def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
extent = self.parameterAsExtent(parameters, self.TARGET_AREA, context)
target_crs = self.parameterAsCrs(parameters, self.TARGET_AREA_CRS, context)
target_geom = QgsGeometry.fromRect(extent)
fields = QgsFields()
fields.append(QgsField('auth_id', QVariant.String, '', 20))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, QgsWkbTypes.NoGeometry, QgsCoordinateReferenceSystem())
# make intersection tests nice and fast
engine = QgsGeometry.createGeometryEngine(target_geom.constGet())
engine.prepareGeometry()
layer_bounds = QgsGeometry.fromRect(source.sourceExtent())
crses_to_check = QgsCoordinateReferenceSystem.validSrsIds()
total = 100.0 / len(crses_to_check)
found_results = 0
transform_context = QgsCoordinateTransformContext()
for current, srs_id in enumerate(crses_to_check):
if feedback.isCanceled():
break
candidate_crs = QgsCoordinateReferenceSystem.fromSrsId(srs_id)
if not candidate_crs.isValid():
continue
transform_candidate = QgsCoordinateTransform(candidate_crs, target_crs, transform_context)
transformed_bounds = QgsGeometry(layer_bounds)
try:
if not transformed_bounds.transform(transform_candidate) == 0:
continue
except:
continue
try:
if engine.intersects(transformed_bounds.constGet()):
feedback.pushInfo(self.tr('Found candidate CRS: {}').format(candidate_crs.authid()))
f = QgsFeature(fields)
f.setAttributes([candidate_crs.authid()])
sink.addFeature(f, QgsFeatureSink.FastInsert)
found_results += 1
except:
continue
feedback.setProgress(int(current * total))
if found_results == 0:
feedback.reportError(self.tr('No matching projections found'))
return {self.OUTPUT: dest_id}
def processAlgorithm(self, progress):
layerA = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT_A))
layerB = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT_B))
fieldA = self.getParameterValue(self.FIELD_A)
fieldB = self.getParameterValue(self.FIELD_B)
idxA = layerA.fields().lookupField(fieldA)
idxB = layerB.fields().lookupField(fieldB)
fieldList = [layerA.fields()[idxA],
layerB.fields()[idxB]]
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fieldList,
QgsWkbTypes.Point, layerA.crs())
spatialIndex = vector.spatialindex(layerB)
outFeat = QgsFeature()
features = vector.features(layerA)
total = 100.0 / len(features)
hasIntersections = False
for current, inFeatA in enumerate(features):
inGeom = inFeatA.geometry()
hasIntersections = False
lines = spatialIndex.intersects(inGeom.boundingBox())
engine = None
if len(lines) > 0:
hasIntersections = True
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
engine.prepareGeometry()
if hasIntersections:
request = QgsFeatureRequest().setFilterFids(lines)
for inFeatB in layerB.getFeatures(request):
tmpGeom = inFeatB.geometry()
points = []
attrsA = inFeatA.attributes()
attrsB = inFeatB.attributes()
if engine.intersects(tmpGeom.geometry()):
tempGeom = inGeom.intersection(tmpGeom)
if tempGeom.type() == QgsWkbTypes.PointGeometry:
if tempGeom.isMultipart():
points = tempGeom.asMultiPoint()
else:
points.append(tempGeom.asPoint())
for j in points:
outFeat.setGeometry(tempGeom.fromPoint(j))
outFeat.setAttributes([attrsA[idxA],
attrsB[idxB]])
writer.addFeature(outFeat)
progress.setPercentage(int(current * total))
del writer
def processAlgorithm(self, feedback):
extent = str(self.getParameterValue(self.EXTENT)).split(',')
spacing = float(self.getParameterValue(self.SPACING))
inset = float(self.getParameterValue(self.INSET))
randomize = self.getParameterValue(self.RANDOMIZE)
isSpacing = self.getParameterValue(self.IS_SPACING)
crsId = self.getParameterValue(self.CRS)
crs = QgsCoordinateReferenceSystem()
crs.createFromUserInput(crsId)
extent = QgsRectangle(float(extent[0]), float(extent[2]),
float(extent[1]), float(extent[3]))
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fields, QgsWkbTypes.Point, crs)
if randomize:
seed()
area = extent.width() * extent.height()
if isSpacing:
pSpacing = spacing
else:
pSpacing = sqrt(area / spacing)
f = QgsFeature()
f.initAttributes(1)
f.setFields(fields)
count = 0
total = 100.0 / (area / pSpacing)
y = extent.yMaximum() - inset
extent_geom = QgsGeometry.fromRect(extent)
extent_engine = QgsGeometry.createGeometryEngine(extent_geom.geometry())
extent_engine.prepareGeometry()
while y >= extent.yMinimum():
x = extent.xMinimum() + inset
while x <= extent.xMaximum():
if randomize:
geom = QgsGeometry().fromPoint(QgsPoint(
uniform(x - (pSpacing / 2.0), x + (pSpacing / 2.0)),
uniform(y - (pSpacing / 2.0), y + (pSpacing / 2.0))))
else:
geom = QgsGeometry().fromPoint(QgsPoint(x, y))
if extent_engine.intersects(geom.geometry()):
f.setAttribute('id', count)
f.setGeometry(geom)
writer.addFeature(f)
x += pSpacing
count += 1
feedback.setProgress(int(count * total))
y = y - pSpacing
del writer
def processAlgorithm(self, parameters, context, feedback):
spacing = self.parameterAsDouble(parameters, self.SPACING, context)
inset = self.parameterAsDouble(parameters, self.INSET, context)
randomize = self.parameterAsBool(parameters, self.RANDOMIZE, context)
isSpacing = self.parameterAsBool(parameters, self.IS_SPACING, context)
crs = self.parameterAsCrs(parameters, self.CRS, context)
extent = self.parameterAsExtent(parameters, self.EXTENT, context, crs)
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, QgsWkbTypes.Point, crs)
if sink is None:
raise QgsProcessingException(self.invalidSinkError(parameters, self.OUTPUT))
if randomize:
seed()
area = extent.width() * extent.height()
if isSpacing:
pSpacing = spacing
else:
pSpacing = sqrt(area / spacing)
f = QgsFeature()
f.initAttributes(1)
f.setFields(fields)
count = 0
total = 100.0 / (area / pSpacing)
y = extent.yMaximum() - inset
extent_geom = QgsGeometry.fromRect(extent)
extent_engine = QgsGeometry.createGeometryEngine(extent_geom.constGet())
extent_engine.prepareGeometry()
while y >= extent.yMinimum():
x = extent.xMinimum() + inset
while x <= extent.xMaximum():
if feedback.isCanceled():
break
if randomize:
geom = QgsGeometry().fromPointXY(QgsPointXY(
uniform(x - (pSpacing / 2.0), x + (pSpacing / 2.0)),
uniform(y - (pSpacing / 2.0), y + (pSpacing / 2.0))))
else:
geom = QgsGeometry().fromPointXY(QgsPointXY(x, y))
if extent_engine.intersects(geom.constGet()):
f.setAttribute('id', count)
f.setGeometry(geom)
sink.addFeature(f, QgsFeatureSink.FastInsert)
x += pSpacing
count += 1
feedback.setProgress(int(count * total))
y = y - pSpacing
return {self.OUTPUT: dest_id}
def smart_clip(layer_to_clip, mask_layer, callback=None):
"""Smart clip a vector layer with another.
Issue https://github.com/inasafe/inasafe/issues/3186
:param layer_to_clip: The vector layer to clip.
:type layer_to_clip: QgsVectorLayer
:param mask_layer: The vector layer to use for clipping.
:type mask_layer: QgsVectorLayer
:param callback: A function to all to indicate progress. The function
should accept params 'current' (int), 'maximum' (int) and 'step' (str).
Defaults to None.
:type callback: function
:return: The clip vector layer.
:rtype: QgsVectorLayer
.. versionadded:: 4.0
"""
output_layer_name = smart_clip_steps['output_layer_name']
processing_step = smart_clip_steps['step_name']
writer = create_memory_layer(
output_layer_name,
layer_to_clip.geometryType(),
layer_to_clip.crs(),
layer_to_clip.fields()
)
writer.startEditing()
# first build up a list of clip geometries
request = QgsFeatureRequest().setSubsetOfAttributes([])
iterator = mask_layer.getFeatures(request)
feature = next(iterator)
geometries = QgsGeometry(feature.geometry())
# use prepared geometries for faster intersection tests
# noinspection PyArgumentList
engine = QgsGeometry.createGeometryEngine(geometries.geometry())
engine.prepareGeometry()
extent = mask_layer.extent()
for feature in layer_to_clip.getFeatures(QgsFeatureRequest(extent)):
if engine.intersects(feature.geometry().geometry()):
out_feat = QgsFeature()
out_feat.setGeometry(feature.geometry())
out_feat.setAttributes(feature.attributes())
writer.addFeature(out_feat)
writer.commitChanges()
writer.keywords = layer_to_clip.keywords.copy()
writer.keywords['title'] = output_layer_name
check_layer(writer)
return writer
def processAlgorithm(self, progress):
polyLayer = dataobjects.getObjectFromUri(self.getParameterValue(self.POLYGONS))
pointLayer = dataobjects.getObjectFromUri(self.getParameterValue(self.POINTS))
fieldName = self.getParameterValue(self.FIELD)
classFieldName = self.getParameterValue(self.CLASSFIELD)
polyProvider = polyLayer.dataProvider()
fields = polyProvider.fields()
fields.append(QgsField(fieldName, QVariant.Int))
classFieldIndex = pointLayer.fieldNameIndex(classFieldName)
(idxCount, fieldList) = vector.findOrCreateField(polyLayer,
polyLayer.pendingFields(), fieldName)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fields.toList(), polyProvider.geometryType(), polyProvider.crs())
spatialIndex = vector.spatialindex(pointLayer)
ftPoint = QgsFeature()
outFeat = QgsFeature()
geom = QgsGeometry()
current = 0
features = vector.features(polyLayer)
total = 100.0 / float(len(features))
for ftPoly in features:
geom = ftPoly.geometry()
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
attrs = ftPoly.attributes()
classes = set()
points = spatialIndex.intersects(geom.boundingBox())
if len(points) > 0:
request = QgsFeatureRequest().setFilterFids(points)
fit = pointLayer.getFeatures(request)
ftPoint = QgsFeature()
while fit.nextFeature(ftPoint):
tmpGeom = QgsGeometry(ftPoint.geometry())
if engine.contains(tmpGeom.geometry()):
clazz = ftPoint.attributes()[classFieldIndex]
if clazz not in classes:
classes.add(clazz)
outFeat.setGeometry(geom)
if idxCount == len(attrs):
attrs.append(len(classes))
else:
attrs[idxCount] = len(classes)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
current += 1
progress.setPercentage(current / total)
del writer
def processAlgorithm(self, progress):
polyLayer = dataobjects.getObjectFromUri(self.getParameterValue(self.POLYGONS))
pointLayer = dataobjects.getObjectFromUri(self.getParameterValue(self.POINTS))
fieldName = self.getParameterValue(self.FIELD)
fieldIdx = pointLayer.fieldNameIndex(self.getParameterValue(self.WEIGHT))
polyProvider = polyLayer.dataProvider()
fields = polyProvider.fields()
fields.append(QgsField(fieldName, QVariant.Int))
(idxCount, fieldList) = vector.findOrCreateField(polyLayer,
polyLayer.pendingFields(), fieldName)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fields.toList(), polyProvider.geometryType(), polyProvider.crs())
spatialIndex = vector.spatialindex(pointLayer)
ftPoint = QgsFeature()
outFeat = QgsFeature()
geom = QgsGeometry()
features = vector.features(polyLayer)
total = 100.0 / len(features)
for current, ftPoly in enumerate(features):
geom = ftPoly.geometry()
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
attrs = ftPoly.attributes()
count = 0
points = spatialIndex.intersects(geom.boundingBox())
if len(points) > 0:
progress.setText(unicode(len(points)))
request = QgsFeatureRequest().setFilterFids(points)
fit = pointLayer.getFeatures(request)
ftPoint = QgsFeature()
while fit.nextFeature(ftPoint):
tmpGeom = QgsGeometry(ftPoint.geometry())
if engine.contains(tmpGeom.geometry()):
weight = unicode(ftPoint.attributes()[fieldIdx])
try:
count += float(weight)
except:
# Ignore fields with non-numeric values
pass
outFeat.setGeometry(geom)
if idxCount == len(attrs):
attrs.append(count)
else:
attrs[idxCount] = count
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
progress.setPercentage(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
polyLayer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.POLYGONS), context)
pointLayer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.POINTS), context)
fieldName = self.getParameterValue(self.FIELD)
fieldIdx = pointLayer.fields().lookupField(self.getParameterValue(self.WEIGHT))
fields = polyLayer.fields()
fields.append(QgsField(fieldName, QVariant.Int))
(idxCount, fieldList) = vector.findOrCreateField(polyLayer,
polyLayer.fields(), fieldName)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields, polyLayer.wkbType(),
polyLayer.crs(), context)
spatialIndex = QgsProcessingUtils.createSpatialIndex(pointLayer, context)
ftPoint = QgsFeature()
outFeat = QgsFeature()
geom = QgsGeometry()
features = QgsProcessingUtils.getFeatures(polyLayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(polyLayer, context)
for current, ftPoly in enumerate(features):
geom = ftPoly.geometry()
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
attrs = ftPoly.attributes()
count = 0
points = spatialIndex.intersects(geom.boundingBox())
if len(points) > 0:
feedback.setProgressText(str(len(points)))
request = QgsFeatureRequest().setFilterFids(points).setSubsetOfAttributes([fieldIdx])
fit = pointLayer.getFeatures(request)
ftPoint = QgsFeature()
while fit.nextFeature(ftPoint):
tmpGeom = QgsGeometry(ftPoint.geometry())
if engine.contains(tmpGeom.geometry()):
weight = str(ftPoint.attributes()[fieldIdx])
try:
count += float(weight)
except:
# Ignore fields with non-numeric values
pass
outFeat.setGeometry(geom)
if idxCount == len(attrs):
attrs.append(count)
else:
attrs[idxCount] = count
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, progress):
vlayerA = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT))
vlayerB = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT2))
geomType = QgsWkbTypes.multiType(vlayerA.wkbType())
fields = vector.combineVectorFields(vlayerA, vlayerB)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields,
geomType, vlayerA.crs())
outFeat = QgsFeature()
index = vector.spatialindex(vlayerB)
selectionA = vector.features(vlayerA)
total = 100.0 / len(selectionA)
for current, inFeatA in enumerate(selectionA):
progress.setPercentage(int(current * total))
geom = inFeatA.geometry()
atMapA = inFeatA.attributes()
intersects = index.intersects(geom.boundingBox())
request = QgsFeatureRequest().setFilterFids(intersects)
engine = None
if len(intersects) > 0:
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
for inFeatB in vlayerB.getFeatures(request):
tmpGeom = inFeatB.geometry()
if engine.intersects(tmpGeom.geometry()):
atMapB = inFeatB.attributes()
int_geom = QgsGeometry(geom.intersection(tmpGeom))
if int_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(int_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
int_com = geom.combine(tmpGeom)
int_geom = QgsGeometry()
if int_com:
int_sym = geom.symDifference(tmpGeom)
int_geom = QgsGeometry(int_com.difference(int_sym))
if int_geom.isGeosEmpty() or not int_geom.isGeosValid():
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
self.tr('GEOS geoprocessing error: One or '
'more input features have invalid '
'geometry.'))
try:
if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]:
outFeat.setGeometry(int_geom)
attrs = []
attrs.extend(atMapA)
attrs.extend(atMapB)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(ProcessingLog.LOG_INFO,
self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
continue
del writer
def processAlgorithm(self, parameters, context, feedback):
polyLayer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.POLYGONS), context)
pointLayer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.POINTS), context)
fieldName = self.getParameterValue(self.FIELD)
classFieldName = self.getParameterValue(self.CLASSFIELD)
fields = polyLayer.fields()
fields.append(QgsField(fieldName, QVariant.Int))
classFieldIndex = pointLayer.fields().lookupField(classFieldName)
(idxCount, fieldList) = vector.findOrCreateField(polyLayer,
polyLayer.fields(), fieldName)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields, polyLayer.wkbType(),
polyLayer.crs(), context)
spatialIndex = QgsProcessingUtils.createSpatialIndex(pointLayer, context)
ftPoint = QgsFeature()
outFeat = QgsFeature()
geom = QgsGeometry()
features = QgsProcessingUtils.getFeatures(polyLayer, context)
total = 100.0 / polyLayer.featureCount() if polyLayer.featureCount() else 0
for current, ftPoly in enumerate(features):
geom = ftPoly.geometry()
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
attrs = ftPoly.attributes()
classes = set()
points = spatialIndex.intersects(geom.boundingBox())
if len(points) > 0:
request = QgsFeatureRequest().setFilterFids(points).setSubsetOfAttributes([classFieldIndex])
fit = pointLayer.getFeatures(request)
ftPoint = QgsFeature()
while fit.nextFeature(ftPoint):
tmpGeom = QgsGeometry(ftPoint.geometry())
if engine.contains(tmpGeom.geometry()):
clazz = ftPoint.attributes()[classFieldIndex]
if clazz not in classes:
classes.add(clazz)
outFeat.setGeometry(geom)
if idxCount == len(attrs):
attrs.append(len(classes))
else:
attrs[idxCount] = len(classes)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
vlayerA = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
vlayerB = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT2), context)
geomType = QgsWkbTypes.multiType(vlayerA.wkbType())
fields = vector.combineVectorFields(vlayerA, vlayerB)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields, geomType, vlayerA.crs(), context)
outFeat = QgsFeature()
index = QgsProcessingUtils.createSpatialIndex(vlayerB, context)
selectionA = QgsProcessingUtils.getFeatures(vlayerA, context)
total = 100.0 / vlayerA.featureCount() if vlayerA.featureCount() else 0
for current, inFeatA in enumerate(selectionA):
feedback.setProgress(int(current * total))
geom = inFeatA.geometry()
atMapA = inFeatA.attributes()
intersects = index.intersects(geom.boundingBox())
request = QgsFeatureRequest().setFilterFids(intersects)
engine = None
if len(intersects) > 0:
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
for inFeatB in vlayerB.getFeatures(request):
tmpGeom = inFeatB.geometry()
if engine.intersects(tmpGeom.geometry()):
atMapB = inFeatB.attributes()
int_geom = QgsGeometry(geom.intersection(tmpGeom))
if int_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(int_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
int_com = geom.combine(tmpGeom)
int_geom = QgsGeometry()
if int_com:
int_sym = geom.symDifference(tmpGeom)
int_geom = QgsGeometry(int_com.difference(int_sym))
if int_geom.isEmpty() or not int_geom.isGeosValid():
raise GeoAlgorithmExecutionException(
self.tr('GEOS geoprocessing error: One or '
'more input features have invalid '
'geometry.'))
try:
if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]:
outFeat.setGeometry(int_geom)
attrs = []
attrs.extend(atMapA)
attrs.extend(atMapB)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
raise GeoAlgorithmExecutionException(
self.tr('Feature geometry error: One or more '
'output features ignored due to invalid '
'geometry.'))
del writer
def processAlgorithm(self, feedback):
polyLayer = dataobjects.getLayerFromString(self.getParameterValue(self.POLYGONS))
pointLayer = dataobjects.getLayerFromString(self.getParameterValue(self.POINTS))
fieldName = self.getParameterValue(self.FIELD)
fields = polyLayer.fields()
fields.append(QgsField(fieldName, QVariant.Int))
(idxCount, fieldList) = vector.findOrCreateField(polyLayer,
polyLayer.fields(), fieldName)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fields.toList(), polyLayer.wkbType(), polyLayer.crs())
spatialIndex = vector.spatialindex(pointLayer)
ftPoly = QgsFeature()
ftPoint = QgsFeature()
outFeat = QgsFeature()
geom = QgsGeometry()
features = vector.features(polyLayer)
total = 100.0 / len(features)
for current, ftPoly in enumerate(features):
geom = ftPoly.geometry()
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
attrs = ftPoly.attributes()
count = 0
points = spatialIndex.intersects(geom.boundingBox())
if len(points) > 0:
request = QgsFeatureRequest().setFilterFids(points).setSubsetOfAttributes([])
fit = pointLayer.getFeatures(request)
ftPoint = QgsFeature()
while fit.nextFeature(ftPoint):
tmpGeom = ftPoint.geometry()
if engine.contains(tmpGeom.geometry()):
count += 1
outFeat.setGeometry(geom)
if idxCount == len(attrs):
attrs.append(count)
else:
attrs[idxCount] = count
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def compute_graph(features, feedback, create_id_graph=False, min_distance=0):
""" compute topology from a layer/field """
s = Graph(sort_graph=False)
id_graph = None
if create_id_graph:
id_graph = Graph(sort_graph=True)
# skip features without geometry
features_with_geometry = {f_id: f for (f_id, f) in features.items() if f.hasGeometry()}
total = 70.0 / len(features_with_geometry) if features_with_geometry else 1
index = QgsSpatialIndex()
i = 0
for feature_id, f in features_with_geometry.items():
if feedback.isCanceled():
break
g = f.geometry()
if min_distance > 0:
g = g.buffer(min_distance, 5)
engine = QgsGeometry.createGeometryEngine(g.constGet())
engine.prepareGeometry()
feature_bounds = g.boundingBox()
# grow bounds a little so we get touching features
feature_bounds.grow(feature_bounds.width() * 0.01)
intersections = index.intersects(feature_bounds)
for l2 in intersections:
f2 = features_with_geometry[l2]
if engine.intersects(f2.geometry().constGet()):
s.add_edge(f.id(), f2.id())
s.add_edge(f2.id(), f.id())
if id_graph:
id_graph.add_edge(f.id(), f2.id())
index.insertFeature(f)
i += 1
feedback.setProgress(int(i * total))
for feature_id, f in features_with_geometry.items():
if feedback.isCanceled():
break
if feature_id not in s.node_edge:
s.add_edge(feature_id, None)
return s, id_graph
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
extent = self.getParameterValue(self.TARGET_AREA).split(',')
if not extent:
extent = QgsProcessingUtils.combineLayerExtents([layer])
target_crs = QgsCoordinateReferenceSystem(self.getParameterValue(self.TARGET_AREA_CRS))
target_geom = QgsGeometry.fromRect(QgsRectangle(float(extent[0]), float(extent[2]),
float(extent[1]), float(extent[3])))
output_file = self.getOutputValue(self.OUTPUT_HTML_FILE)
# make intersection tests nice and fast
engine = QgsGeometry.createGeometryEngine(target_geom.geometry())
engine.prepareGeometry()
layer_bounds = QgsGeometry.fromRect(layer.extent())
results = []
for srs_id in QgsCoordinateReferenceSystem.validSrsIds():
candidate_crs = QgsCoordinateReferenceSystem.fromSrsId(srs_id)
if not candidate_crs.isValid():
continue
transform_candidate = QgsCoordinateTransform(candidate_crs, target_crs)
transformed_bounds = QgsGeometry(layer_bounds)
try:
if not transformed_bounds.transform(transform_candidate) == 0:
continue
except:
continue
if engine.intersects(transformed_bounds.geometry()):
results.append(candidate_crs.authid())
self.createHTML(output_file, results)
def __init__(self, source, request):
super().__init__(request)
self._request = request if request is not None else QgsFeatureRequest()
self._source = source
self._index = 0
self._transform = QgsCoordinateTransform()
if self._request.destinationCrs().isValid() and self._request.destinationCrs() != self._source._provider.crs():
self._transform = QgsCoordinateTransform(self._source._provider.crs(), self._request.destinationCrs(), self._request.transformContext())
try:
self._filter_rect = self.filterRectToSourceCrs(self._transform)
except QgsCsException as e:
self.close()
return
self._filter_rect = self.filterRectToSourceCrs(self._transform)
if not self._filter_rect.isNull():
self._select_rect_geom = QgsGeometry.fromRect(self._filter_rect)
self._select_rect_engine = QgsGeometry.createGeometryEngine(self._select_rect_geom.constGet())
self._select_rect_engine.prepareGeometry()
else:
self._select_rect_engine = None
self._select_rect_geom = None
self._feature_id_list = None
if self._filter_rect is not None and self._source._provider._spatialindex is not None:
self._feature_id_list = self._source._provider._spatialindex.intersects(self._filter_rect)
def processAlgorithm(self, feedback):
layerA = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT_A))
splitLayer = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT_B))
sameLayer = self.getParameterValue(
self.INPUT_A) == self.getParameterValue(self.INPUT_B)
fieldList = layerA.fields()
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fieldList, QgsWkbTypes.multiType(layerA.wkbType()), layerA.crs())
spatialIndex = QgsSpatialIndex()
splitGeoms = {}
request = QgsFeatureRequest()
request.setSubsetOfAttributes([])
for aSplitFeature in vector.features(splitLayer, request):
splitGeoms[aSplitFeature.id()] = aSplitFeature.geometry()
spatialIndex.insertFeature(aSplitFeature)
# honor the case that user has selection on split layer and has setting "use selection"
outFeat = QgsFeature()
features = vector.features(layerA)
if len(features) == 0:
total = 100
else:
total = 100.0 / float(len(features))
for current, inFeatA in enumerate(features):
inGeom = inFeatA.geometry()
attrsA = inFeatA.attributes()
outFeat.setAttributes(attrsA)
if inGeom.isMultipart():
inGeoms = []
for g in inGeom.asGeometryCollection():
inGeoms.append(g)
else:
inGeoms = [inGeom]
lines = spatialIndex.intersects(inGeom.boundingBox())
if len(lines) > 0: # has intersection of bounding boxes
splittingLines = []
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
engine.prepareGeometry()
for i in lines:
try:
splitGeom = splitGeoms[i]
except:
continue
# check if trying to self-intersect
if sameLayer:
if inFeatA.id() == i:
continue
if engine.intersects(splitGeom.geometry()):
splittingLines.append(splitGeom)
if len(splittingLines) > 0:
for splitGeom in splittingLines:
splitterPList = None
outGeoms = []
split_geom_engine = QgsGeometry.createGeometryEngine(
splitGeom.geometry())
split_geom_engine.prepareGeometry()
while len(inGeoms) > 0:
inGeom = inGeoms.pop()
if inGeom.isNull(
): # this has been encountered and created a run-time error
continue
if split_geom_engine.intersects(inGeom.geometry()):
inPoints = vector.extractPoints(inGeom)
if splitterPList == None:
splitterPList = vector.extractPoints(
splitGeom)
try:
result, newGeometries, topoTestPoints = inGeom.splitGeometry(
splitterPList, False)
except:
ProcessingLog.addToLog(
ProcessingLog.LOG_WARNING,
self.
tr('Geometry exception while splitting'
))
result = 1
# splitGeometry: If there are several intersections
# between geometry and splitLine, only the first one is considered.
if result == 0: # split occurred
if inPoints == vector.extractPoints(
inGeom):
# bug in splitGeometry: sometimes it returns 0 but
# the geometry is unchanged
outGeoms.append(inGeom)
else:
inGeoms.append(inGeom)
for aNewGeom in newGeometries:
inGeoms.append(aNewGeom)
else:
outGeoms.append(inGeom)
else:
outGeoms.append(inGeom)
inGeoms = outGeoms
parts = []
for aGeom in inGeoms:
passed = True
if QgsWkbTypes.geometryType(
aGeom.wkbType()) == QgsWkbTypes.LineGeometry:
numPoints = aGeom.geometry().numPoints()
if numPoints <= 2:
if numPoints == 2:
passed = not aGeom.geometry().isClosed(
) # tests if vertex 0 = vertex 1
else:
passed = False
# sometimes splitting results in lines of zero length
if passed:
parts.append(aGeom)
if len(parts) > 0:
outFeat.setGeometry(QgsGeometry.collectGeometry(parts))
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_VECTOR), context)
rasterPath = str(self.getParameterValue(self.INPUT_RASTER))
rasterDS = gdal.Open(rasterPath, gdal.GA_ReadOnly)
geoTransform = rasterDS.GetGeoTransform()
rasterDS = None
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
fields.append(QgsField('poly_id', QVariant.Int, '', 10, 0))
fields.append(QgsField('point_id', QVariant.Int, '', 10, 0))
writer = self.getOutputFromName(self.OUTPUT_LAYER).getVectorWriter(fields, QgsWkbTypes.Point,
layer.crs(), context)
outFeature = QgsFeature()
outFeature.setFields(fields)
fid = 0
polyId = 0
pointId = 0
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / layer.featureCount() if layer.featureCount() else 0
for current, f in enumerate(features):
geom = f.geometry()
bbox = geom.boundingBox()
xMin = bbox.xMinimum()
xMax = bbox.xMaximum()
yMin = bbox.yMinimum()
yMax = bbox.yMaximum()
(startRow, startColumn) = raster.mapToPixel(xMin, yMax, geoTransform)
(endRow, endColumn) = raster.mapToPixel(xMax, yMin, geoTransform)
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
for row in range(startRow, endRow + 1):
for col in range(startColumn, endColumn + 1):
(x, y) = raster.pixelToMap(row, col, geoTransform)
point = QgsPointXY()
point.setX(x)
point.setY(y)
if engine.contains(point):
outFeature.setGeometry(QgsGeometry(point))
outFeature['id'] = fid
outFeature['poly_id'] = polyId
outFeature['point_id'] = pointId
fid += 1
pointId += 1
writer.addFeature(outFeature, QgsFeatureSink.FastInsert)
pointId = 0
polyId += 1
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
source_layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(Clip.INPUT), context)
mask_layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(Clip.OVERLAY), context)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(source_layer.fields(),
QgsWkbTypes.multiType(source_layer.wkbType()),
source_layer.crs(), context)
# first build up a list of clip geometries
clip_geoms = []
for maskFeat in QgsProcessingUtils.getFeatures(mask_layer, context, QgsFeatureRequest().setSubsetOfAttributes([])):
clip_geoms.append(maskFeat.geometry())
# are we clipping against a single feature? if so, we can show finer progress reports
if len(clip_geoms) > 1:
combined_clip_geom = QgsGeometry.unaryUnion(clip_geoms)
single_clip_feature = False
else:
combined_clip_geom = clip_geoms[0]
single_clip_feature = True
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(combined_clip_geom.geometry())
engine.prepareGeometry()
tested_feature_ids = set()
for i, clip_geom in enumerate(clip_geoms):
input_features = [f for f in QgsProcessingUtils.getFeatures(source_layer, context,
QgsFeatureRequest().setFilterRect(clip_geom.boundingBox()))]
if not input_features:
continue
if single_clip_feature:
total = 100.0 / len(input_features)
else:
total = 0
for current, in_feat in enumerate(input_features):
if not in_feat.geometry():
continue
if in_feat.id() in tested_feature_ids:
# don't retest a feature we have already checked
continue
tested_feature_ids.add(in_feat.id())
if not engine.intersects(in_feat.geometry().geometry()):
continue
if not engine.contains(in_feat.geometry().geometry()):
cur_geom = in_feat.geometry()
new_geom = combined_clip_geom.intersection(cur_geom)
if new_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(new_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
int_com = in_feat.geometry().combine(new_geom)
int_sym = in_feat.geometry().symDifference(new_geom)
new_geom = int_com.difference(int_sym)
else:
# clip geometry totally contains feature geometry, so no need to perform intersection
new_geom = in_feat.geometry()
try:
out_feat = QgsFeature()
out_feat.setGeometry(new_geom)
out_feat.setAttributes(in_feat.attributes())
writer.addFeature(out_feat)
except:
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more '
'output features ignored due to '
'invalid geometry.'), self.tr('Processing'), QgsMessageLog.CRITICAL)
continue
if single_clip_feature:
feedback.setProgress(int(current * total))
if not single_clip_feature:
# coarse progress report for multiple clip geometries
feedback.setProgress(100.0 * i / len(clip_geoms))
del writer
def processAlgorithm(self, feedback):
inLayer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))
boundary = self.getParameterValue(self.MODE) == self.MODE_BOUNDARY
smallestArea = self.getParameterValue(self.MODE) == self.MODE_SMALLEST_AREA
keepSelection = self.getParameterValue(self.KEEPSELECTION)
processLayer = vector.duplicateInMemory(inLayer)
if not keepSelection:
# Make a selection with the values provided
attribute = self.getParameterValue(self.ATTRIBUTE)
comparison = self.comparisons[self.getParameterValue(self.COMPARISON)]
comparisonvalue = self.getParameterValue(self.COMPARISONVALUE)
selectindex = vector.resolveFieldIndex(processLayer, attribute)
selectType = processLayer.fields()[selectindex].type()
selectionError = False
if selectType in [QVariant.Int, QVariant.LongLong, QVariant.UInt, QVariant.ULongLong]:
try:
y = int(comparisonvalue)
except ValueError:
selectionError = True
msg = self.tr('Cannot convert "%s" to integer' % str(comparisonvalue))
elif selectType == QVariant.Double:
try:
y = float(comparisonvalue)
except ValueError:
selectionError = True
msg = self.tr('Cannot convert "%s" to float' % str(comparisonvalue))
elif selectType == QVariant.String:
# 10: string, boolean
try:
y = str(comparisonvalue)
except ValueError:
selectionError = True
msg = self.tr('Cannot convert "%s" to Unicode' % str(comparisonvalue))
elif selectType == QVariant.Date:
# date
dateAndFormat = comparisonvalue.split(' ')
if len(dateAndFormat) == 1:
# QDate object
y = QLocale.system().toDate(dateAndFormat[0])
if y.isNull():
msg = self.tr('Cannot convert "%s" to date with system date format %s' % (str(dateAndFormat), QLocale.system().dateFormat()))
elif len(dateAndFormat) == 2:
y = QDate.fromString(dateAndFormat[0], dateAndFormat[1])
if y.isNull():
msg = self.tr('Cannot convert "%s" to date with format string "%s"' % (str(dateAndFormat[0]), dateAndFormat[1]))
else:
y = QDate()
msg = ''
if y.isNull():
# Conversion was unsuccessful
selectionError = True
msg += self.tr('Enter the date and the date format, e.g. "07.26.2011" "MM.dd.yyyy".')
if (comparison == 'begins with' or comparison == 'contains') \
and selectType != QVariant.String:
selectionError = True
msg = self.tr('"%s" can only be used with string fields' % comparison)
selected = []
if selectionError:
raise GeoAlgorithmExecutionException(
self.tr('Error in selection input: %s' % msg))
else:
for feature in processLayer.getFeatures():
aValue = feature.attributes()[selectindex]
if aValue is None:
continue
if selectType in [QVariant.Int, QVariant.LongLong, QVariant.UInt, QVariant.ULongLong]:
x = int(aValue)
elif selectType == QVariant.Double:
x = float(aValue)
elif selectType == QVariant.String:
# 10: string, boolean
x = str(aValue)
elif selectType == QVariant.Date:
# date
x = aValue # should be date
match = False
if comparison == '==':
match = x == y
elif comparison == '!=':
match = x != y
elif comparison == '>':
match = x > y
elif comparison == '>=':
match = x >= y
elif comparison == '<':
match = x < y
elif comparison == '<=':
match = x <= y
elif comparison == 'begins with':
match = x.startswith(y)
elif comparison == 'contains':
match = x.find(y) >= 0
if match:
selected.append(feature.id())
processLayer.selectByIds(selected)
if processLayer.selectedFeatureCount() == 0:
ProcessingLog.addToLog(ProcessingLog.LOG_WARNING,
self.tr('%s: (No selection in input layer "%s")' % (self.commandLineName(), self.getParameterValue(self.INPUT))))
# Keep references to the features to eliminate
featToEliminate = []
for aFeat in processLayer.selectedFeatures():
featToEliminate.append(aFeat)
# Delete all features to eliminate in processLayer (we won't save this)
processLayer.startEditing()
processLayer.deleteSelectedFeatures()
# ANALYZE
if len(featToEliminate) > 0: # Prevent zero division
start = 20.00
add = 80.00 / len(featToEliminate)
else:
start = 100
feedback.setProgress(start)
madeProgress = True
# We go through the list and see if we find any polygons we can
# merge the selected with. If we have no success with some we
# merge and then restart the whole story.
while madeProgress: # Check if we made any progress
madeProgress = False
featNotEliminated = []
# Iterate over the polygons to eliminate
for i in range(len(featToEliminate)):
feat = featToEliminate.pop()
geom2Eliminate = feat.geometry()
bbox = geom2Eliminate.boundingBox()
fit = processLayer.getFeatures(
QgsFeatureRequest().setFilterRect(bbox).setSubsetOfAttributes([]))
mergeWithFid = None
mergeWithGeom = None
max = 0
min = -1
selFeat = QgsFeature()
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(geom2Eliminate.geometry())
engine.prepareGeometry()
while fit.nextFeature(selFeat):
selGeom = selFeat.geometry()
if engine.intersects(selGeom.geometry()):
# We have a candidate
iGeom = geom2Eliminate.intersection(selGeom)
if not iGeom:
continue
if boundary:
selValue = iGeom.length()
else:
# area. We need a common boundary in
# order to merge
if 0 < iGeom.length():
selValue = selGeom.area()
else:
selValue = -1
if -1 != selValue:
useThis = True
if smallestArea:
if -1 == min:
min = selValue
else:
if selValue < min:
min = selValue
else:
useThis = False
else:
if selValue > max:
max = selValue
else:
useThis = False
if useThis:
mergeWithFid = selFeat.id()
mergeWithGeom = QgsGeometry(selGeom)
# End while fit
if mergeWithFid is not None:
# A successful candidate
newGeom = mergeWithGeom.combine(geom2Eliminate)
if processLayer.changeGeometry(mergeWithFid, newGeom):
madeProgress = True
else:
raise GeoAlgorithmExecutionException(
self.tr('Could not replace geometry of feature with id %s' % mergeWithFid))
start = start + add
feedback.setProgress(start)
else:
featNotEliminated.append(feat)
# End for featToEliminate
featToEliminate = featNotEliminated
# End while
# Create output
output = self.getOutputFromName(self.OUTPUT)
writer = output.getVectorWriter(processLayer.fields(),
processLayer.wkbType(), processLayer.crs())
# Write all features that are left over to output layer
iterator = processLayer.getFeatures()
for feature in iterator:
writer.addFeature(feature)
# Leave processLayer untouched
processLayer.rollBack()
for feature in featNotEliminated:
writer.addFeature(feature)
def processAlgorithm(self, progress):
vlayerA = dataobjects.getObjectFromUri(self.getParameterValue(Union.INPUT))
vlayerB = dataobjects.getObjectFromUri(self.getParameterValue(Union.INPUT2))
geomType = vlayerA.wkbType()
fields = vector.combineVectorFields(vlayerA, vlayerB)
writer = self.getOutputFromName(Union.OUTPUT).getVectorWriter(fields,
geomType, vlayerA.crs())
inFeatA = QgsFeature()
inFeatB = QgsFeature()
outFeat = QgsFeature()
indexA = vector.spatialindex(vlayerB)
indexB = vector.spatialindex(vlayerA)
count = 0
nElement = 0
featuresA = vector.features(vlayerA)
nFeat = len(featuresA)
for inFeatA in featuresA:
progress.setPercentage(nElement / float(nFeat) * 50)
nElement += 1
lstIntersectingB = []
geom = inFeatA.geometry()
atMapA = inFeatA.attributes()
intersects = indexA.intersects(geom.boundingBox())
if len(intersects) < 1:
try:
outFeat.setGeometry(geom)
outFeat.setAttributes(atMapA)
writer.addFeature(outFeat)
except:
# This really shouldn't happen, as we haven't
# edited the input geom at all
ProcessingLog.addToLog(ProcessingLog.LOG_INFO,
self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
else:
request = QgsFeatureRequest().setFilterFids(intersects)
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
for inFeatB in vlayerB.getFeatures(request):
count += 1
atMapB = inFeatB.attributes()
tmpGeom = inFeatB.geometry()
if engine.intersects(tmpGeom.geometry()):
int_geom = geom.intersection(tmpGeom)
lstIntersectingB.append(tmpGeom)
if not int_geom:
# There was a problem creating the intersection
ProcessingLog.addToLog(ProcessingLog.LOG_INFO,
self.tr('GEOS geoprocessing error: One or more input features have invalid geometry.'))
int_geom = QgsGeometry()
else:
int_geom = QgsGeometry(int_geom)
if int_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(int_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
# Intersection produced different geomety types
temp_list = int_geom.asGeometryCollection()
for i in temp_list:
if i.type() == geom.type():
int_geom = QgsGeometry(i)
try:
outFeat.setGeometry(int_geom)
outFeat.setAttributes(atMapA + atMapB)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(ProcessingLog.LOG_INFO,
self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
else:
# Geometry list: prevents writing error
# in geometries of different types
# produced by the intersection
# fix #3549
if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]:
try:
outFeat.setGeometry(int_geom)
outFeat.setAttributes(atMapA + atMapB)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(ProcessingLog.LOG_INFO,
self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
# the remaining bit of inFeatA's geometry
# if there is nothing left, this will just silently fail and we're good
diff_geom = QgsGeometry(geom)
if len(lstIntersectingB) != 0:
intB = QgsGeometry.unaryUnion(lstIntersectingB)
diff_geom = diff_geom.difference(intB)
if diff_geom.isGeosEmpty() or not diff_geom.isGeosValid():
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
self.tr('GEOS geoprocessing error: One or more input features have invalid geometry.'))
if diff_geom.wkbType() == 0 or QgsWkbTypes.flatType(diff_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
temp_list = diff_geom.asGeometryCollection()
for i in temp_list:
if i.type() == geom.type():
diff_geom = QgsGeometry(i)
try:
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMapA)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(ProcessingLog.LOG_INFO,
self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
length = len(vlayerA.fields())
atMapA = [None] * length
featuresA = vector.features(vlayerB)
nFeat = len(featuresA)
for inFeatA in featuresA:
progress.setPercentage(nElement / float(nFeat) * 100)
add = False
geom = inFeatA.geometry()
diff_geom = QgsGeometry(geom)
atMap = [None] * length
atMap.extend(inFeatA.attributes())
intersects = indexB.intersects(geom.boundingBox())
if len(intersects) < 1:
try:
outFeat.setGeometry(geom)
outFeat.setAttributes(atMap)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(ProcessingLog.LOG_INFO,
self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
else:
request = QgsFeatureRequest().setFilterFids(intersects)
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(diff_geom.geometry())
engine.prepareGeometry()
for inFeatB in vlayerA.getFeatures(request):
atMapB = inFeatB.attributes()
tmpGeom = inFeatB.geometry()
if engine.intersects(tmpGeom.geometry()):
add = True
diff_geom = QgsGeometry(diff_geom.difference(tmpGeom))
if diff_geom.isGeosEmpty() or not diff_geom.isGeosValid():
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
self.tr('GEOS geoprocessing error: One or more input features have invalid geometry.'))
else:
try:
# Ihis only happends if the bounding box
# intersects, but the geometry doesn't
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMap)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(ProcessingLog.LOG_INFO,
self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
if add:
try:
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMap)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(ProcessingLog.LOG_INFO,
self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
nElement += 1
del writer
def processAlgorithm(self, context, feedback):
layerA = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT_A), context)
layerB = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT_B), context)
sameLayer = self.getParameterValue(
self.INPUT_A) == self.getParameterValue(self.INPUT_B)
fieldList = layerA.fields()
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fieldList, QgsWkbTypes.LineString, layerA.crs(), context)
spatialIndex = QgsProcessingUtils.createSpatialIndex(layerB, context)
outFeat = QgsFeature()
features = QgsProcessingUtils.getFeatures(layerA, context)
total = 100.0 / QgsProcessingUtils.featureCount(layerA, context)
for current, inFeatA in enumerate(features):
inGeom = inFeatA.geometry()
attrsA = inFeatA.attributes()
outFeat.setAttributes(attrsA)
inLines = [inGeom]
lines = spatialIndex.intersects(inGeom.boundingBox())
engine = None
if len(lines) > 0:
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
engine.prepareGeometry()
if len(lines) > 0: # hasIntersections
splittingLines = []
request = QgsFeatureRequest().setFilterFids(
lines).setSubsetOfAttributes([])
for inFeatB in layerB.getFeatures(request):
# check if trying to self-intersect
if sameLayer:
if inFeatA.id() == inFeatB.id():
continue
splitGeom = inFeatB.geometry()
if engine.intersects(splitGeom.geometry()):
splittingLines.append(splitGeom)
if len(splittingLines) > 0:
for splitGeom in splittingLines:
splitterPList = vector.extractPoints(splitGeom)
outLines = []
split_geom_engine = QgsGeometry.createGeometryEngine(
splitGeom.geometry())
split_geom_engine.prepareGeometry()
while len(inLines) > 0:
inGeom = inLines.pop()
inPoints = vector.extractPoints(inGeom)
if split_geom_engine.intersects(inGeom.geometry()):
try:
result, newGeometries, topoTestPoints = inGeom.splitGeometry(
splitterPList, False)
except:
QgsMessageLog.logMessage(
self.
tr('Geometry exception while splitting'
), self.tr('Processing'),
QgsMessageLog.WARNING)
result = 1
# splitGeometry: If there are several intersections
# between geometry and splitLine, only the first one is considered.
if result == 0: # split occurred
if inPoints == vector.extractPoints(
inGeom):
# bug in splitGeometry: sometimes it returns 0 but
# the geometry is unchanged
outLines.append(inGeom)
else:
inLines.append(inGeom)
for aNewGeom in newGeometries:
inLines.append(aNewGeom)
else:
outLines.append(inGeom)
else:
outLines.append(inGeom)
inLines = outLines
for aLine in inLines:
if len(aLine.asPolyline()) > 2 or \
(len(aLine.asPolyline()) == 2 and
aLine.asPolyline()[0] != aLine.asPolyline()[1]):
# sometimes splitting results in lines of zero length
outFeat.setGeometry(aLine)
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, progress):
vlayerA = dataobjects.getObjectFromUri(self.getParameterValue(Union.INPUT))
vlayerB = dataobjects.getObjectFromUri(self.getParameterValue(Union.INPUT2))
geomType = vlayerA.wkbType()
fields = vector.combineVectorFields(vlayerA, vlayerB)
writer = self.getOutputFromName(Union.OUTPUT).getVectorWriter(fields, geomType, vlayerA.crs())
inFeatA = QgsFeature()
inFeatB = QgsFeature()
outFeat = QgsFeature()
indexA = vector.spatialindex(vlayerB)
indexB = vector.spatialindex(vlayerA)
count = 0
nElement = 0
featuresA = vector.features(vlayerA)
nFeat = len(featuresA)
for inFeatA in featuresA:
progress.setPercentage(nElement / float(nFeat) * 50)
nElement += 1
lstIntersectingB = []
geom = inFeatA.geometry()
atMapA = inFeatA.attributes()
intersects = indexA.intersects(geom.boundingBox())
if len(intersects) < 1:
try:
outFeat.setGeometry(geom)
outFeat.setAttributes(atMapA)
writer.addFeature(outFeat)
except:
# This really shouldn't happen, as we haven't
# edited the input geom at all
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.tr("Feature geometry error: One or more output features ignored due to invalid geometry."),
)
else:
request = QgsFeatureRequest().setFilterFids(intersects)
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
for inFeatB in vlayerB.getFeatures(request):
count += 1
atMapB = inFeatB.attributes()
tmpGeom = inFeatB.geometry()
if engine.intersects(tmpGeom.geometry()):
int_geom = geom.intersection(tmpGeom)
lstIntersectingB.append(tmpGeom)
if not int_geom:
# There was a problem creating the intersection
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.tr("GEOS geoprocessing error: One or more input features have invalid geometry."),
)
int_geom = QgsGeometry()
else:
int_geom = QgsGeometry(int_geom)
if (
int_geom.wkbType() == QgsWkbTypes.Unknown
or QgsWkbTypes.flatType(int_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection
):
# Intersection produced different geomety types
temp_list = int_geom.asGeometryCollection()
for i in temp_list:
if i.type() == geom.type():
int_geom = QgsGeometry(i)
try:
outFeat.setGeometry(int_geom)
outFeat.setAttributes(atMapA + atMapB)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.tr(
"Feature geometry error: One or more output features ignored due to invalid geometry."
),
)
else:
# Geometry list: prevents writing error
# in geometries of different types
# produced by the intersection
# fix #3549
if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]:
try:
outFeat.setGeometry(int_geom)
outFeat.setAttributes(atMapA + atMapB)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.tr(
"Feature geometry error: One or more output features ignored due to invalid geometry."
),
)
# the remaining bit of inFeatA's geometry
# if there is nothing left, this will just silently fail and we're good
diff_geom = QgsGeometry(geom)
if len(lstIntersectingB) != 0:
intB = QgsGeometry.unaryUnion(lstIntersectingB)
diff_geom = diff_geom.difference(intB)
if diff_geom.isGeosEmpty() or not diff_geom.isGeosValid():
ProcessingLog.addToLog(
ProcessingLog.LOG_ERROR,
self.tr("GEOS geoprocessing error: One or more input features have invalid geometry."),
)
if (
diff_geom.wkbType() == 0
or QgsWkbTypes.flatType(diff_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection
):
temp_list = diff_geom.asGeometryCollection()
for i in temp_list:
if i.type() == geom.type():
diff_geom = QgsGeometry(i)
try:
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMapA)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.tr("Feature geometry error: One or more output features ignored due to invalid geometry."),
)
length = len(vlayerA.fields())
atMapA = [None] * length
featuresA = vector.features(vlayerB)
nFeat = len(featuresA)
for inFeatA in featuresA:
progress.setPercentage(nElement / float(nFeat) * 100)
add = False
geom = inFeatA.geometry()
diff_geom = QgsGeometry(geom)
atMap = [None] * length
atMap.extend(inFeatA.attributes())
intersects = indexB.intersects(geom.boundingBox())
if len(intersects) < 1:
try:
outFeat.setGeometry(geom)
outFeat.setAttributes(atMap)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.tr("Feature geometry error: One or more output features ignored due to invalid geometry."),
)
else:
request = QgsFeatureRequest().setFilterFids(intersects)
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(diff_geom.geometry())
engine.prepareGeometry()
for inFeatB in vlayerA.getFeatures(request):
atMapB = inFeatB.attributes()
tmpGeom = inFeatB.geometry()
if engine.intersects(tmpGeom.geometry()):
add = True
diff_geom = QgsGeometry(diff_geom.difference(tmpGeom))
if diff_geom.isGeosEmpty() or not diff_geom.isGeosValid():
ProcessingLog.addToLog(
ProcessingLog.LOG_ERROR,
self.tr("GEOS geoprocessing error: One or more input features have invalid geometry."),
)
else:
try:
# Ihis only happends if the bounding box
# intersects, but the geometry doesn't
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMap)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.tr(
"Feature geometry error: One or more output features ignored due to invalid geometry."
),
)
if add:
try:
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMap)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.tr("Feature geometry error: One or more output features ignored due to invalid geometry."),
)
nElement += 1
del writer
def processAlgorithm(self, parameters, context, feedback):
sourceA = self.parameterAsSource(parameters, self.INPUT, context)
sourceB = self.parameterAsSource(parameters, self.INTERSECT, context)
fieldsA = self.parameterAsFields(parameters, self.INPUT_FIELDS,
context)
fieldsB = self.parameterAsFields(parameters, self.INTERSECT_FIELDS,
context)
fieldListA = QgsFields()
field_indices_a = []
if len(fieldsA) > 0:
for f in fieldsA:
idxA = sourceA.fields().lookupField(f)
if idxA >= 0:
field_indices_a.append(idxA)
fieldListA.append(sourceA.fields()[idxA])
else:
fieldListA = sourceA.fields()
field_indices_a = [i for i in range(0, fieldListA.count())]
fieldListB = QgsFields()
field_indices_b = []
if len(fieldsB) > 0:
for f in fieldsB:
idxB = sourceB.fields().lookupField(f)
if idxB >= 0:
field_indices_b.append(idxB)
fieldListB.append(sourceB.fields()[idxB])
else:
fieldListB = sourceB.fields()
field_indices_b = [i for i in range(0, fieldListB.count())]
fieldListB = vector.testForUniqueness(fieldListA, fieldListB)
for b in fieldListB:
fieldListA.append(b)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT,
context, fieldListA,
QgsWkbTypes.Point,
sourceA.sourceCrs())
spatialIndex = QgsSpatialIndex(
sourceB.getFeatures(QgsFeatureRequest().setSubsetOfAttributes(
[]).setDestinationCrs(sourceA.sourceCrs())), feedback)
outFeat = QgsFeature()
features = sourceA.getFeatures(
QgsFeatureRequest().setSubsetOfAttributes(field_indices_a))
total = 100.0 / sourceA.featureCount() if sourceA.featureCount() else 0
for current, inFeatA in enumerate(features):
if feedback.isCanceled():
break
if not inFeatA.hasGeometry():
continue
inGeom = inFeatA.geometry()
has_intersections = False
lines = spatialIndex.intersects(inGeom.boundingBox())
engine = None
if len(lines) > 0:
has_intersections = True
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
engine.prepareGeometry()
if has_intersections:
request = QgsFeatureRequest().setFilterFids(lines)
request.setDestinationCrs(sourceA.sourceCrs())
request.setSubsetOfAttributes(field_indices_b)
for inFeatB in sourceB.getFeatures(request):
if feedback.isCanceled():
break
tmpGeom = inFeatB.geometry()
points = []
if engine.intersects(tmpGeom.geometry()):
tempGeom = inGeom.intersection(tmpGeom)
out_attributes = [
inFeatA.attributes()[i] for i in field_indices_a
]
out_attributes.extend(
[inFeatB.attributes()[i] for i in field_indices_b])
if tempGeom.type() == QgsWkbTypes.PointGeometry:
if tempGeom.isMultipart():
points = tempGeom.asMultiPoint()
else:
points.append(tempGeom.asPoint())
for j in points:
outFeat.setGeometry(tempGeom.fromPoint(j))
outFeat.setAttributes(out_attributes)
sink.addFeature(outFeat,
QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}
def assign_highest_value(exposure, hazard, callback=None):
"""Assign the highest hazard value to an indivisible feature.
For indivisible polygon exposure layers such as buildings, we need to
assigned the greatest hazard that each polygon touches and use that as the
effective hazard class.
Issue https://github.com/inasafe/inasafe/issues/3192
We follow the concept here that any part of the exposure dataset that
touches the hazard is affected, and the greatest hazard is the effective
hazard.
:param exposure: The building vector layer.
:type exposure: QgsVectorLayer
:param hazard: The vector layer to use for hazard.
:type hazard: QgsVectorLayer
:param callback: A function to all to indicate progress. The function
should accept params 'current' (int), 'maximum' (int) and 'step' (str).
Defaults to None.
:type callback: function
:return: The new impact layer.
:rtype: QgsVectorLayer
.. versionadded:: 4.0
"""
output_layer_name = assign_highest_value_steps['output_layer_name']
processing_step = assign_highest_value_steps['step_name']
hazard_inasafe_fields = hazard.keywords['inasafe_fields']
if not hazard.keywords.get('classification'):
raise InvalidKeywordsForProcessingAlgorithm
if not hazard_inasafe_fields.get(hazard_class_field['key']):
raise InvalidKeywordsForProcessingAlgorithm
indices = []
exposure.startEditing()
for field in hazard.fields():
exposure.addAttribute(field)
indices.append(exposure.fieldNameIndex(field.name()))
exposure.commitChanges()
provider = exposure.dataProvider()
spatial_index = create_spatial_index(exposure)
# cache features from exposure layer for faster retrieval
exposure_features = {}
for f in exposure.getFeatures():
exposure_features[f.id()] = f
# Todo callback
# total = 100.0 / len(selectionA)
hazard_field = hazard_inasafe_fields[hazard_class_field['key']]
layer_classification = None
for classification in hazard_classification['types']:
if classification['key'] == hazard.keywords['classification']:
layer_classification = classification
break
# Get a ordered list of classes like ['high', 'medium', 'low']
levels = [key['key'] for key in layer_classification['classes']]
levels.append(not_exposed_class['key'])
# Let's loop over the hazard layer, from high to low hazard zone.
for hazard_value in levels:
expression = '"%s" = \'%s\'' % (hazard_field, hazard_value)
hazard_request = QgsFeatureRequest().setFilterExpression(expression)
update_map = {}
for area in hazard.getFeatures(hazard_request):
geometry = area.geometry()
intersects = spatial_index.intersects(geometry.boundingBox())
# use prepared geometry: makes multiple intersection tests faster
geometry_prepared = QgsGeometry.createGeometryEngine(
geometry.geometry())
geometry_prepared.prepareGeometry()
# We need to loop over each intersections exposure / hazard.
for i in intersects:
building = exposure_features[i]
building_geometry = building.geometry()
if geometry_prepared.intersects(building_geometry.geometry()):
update_map[building.id()] = {}
for index, value in zip(indices, area.attributes()):
update_map[building.id()][index] = value
# We don't want this building again, let's remove it from
# the index.
spatial_index.deleteFeature(building)
provider.changeAttributeValues(update_map)
exposure.updateExtents()
exposure.updateFields()
exposure.keywords['inasafe_fields'].update(
hazard.keywords['inasafe_fields'])
exposure.keywords['layer_purpose'] = layer_purpose_exposure_summary['key']
exposure.keywords['exposure_keywords'] = exposure.keywords.copy()
exposure.keywords['aggregation_keywords'] = (
hazard.keywords['aggregation_keywords'].copy())
exposure.keywords['hazard_keywords'] = (
hazard.keywords['hazard_keywords'].copy())
exposure.keywords['title'] = output_layer_name
check_layer(exposure)
return exposure
def processAlgorithm(self, parameters, context, feedback):
inLayer = self.parameterAsVectorLayer(parameters, self.INPUT, context)
boundary = self.parameterAsEnum(parameters, self.MODE,
context) == self.MODE_BOUNDARY
smallestArea = self.parameterAsEnum(parameters, self.MODE,
context) == self.MODE_SMALLEST_AREA
if inLayer.selectedFeatureCount() == 0:
feedback.reportError(
self.tr('{0}: (No selection in input layer "{1}")').format(
self.displayName(), parameters[self.INPUT]))
featToEliminate = []
selFeatIds = inLayer.selectedFeatureIds()
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT,
context, inLayer.fields(),
inLayer.wkbType(),
inLayer.sourceCrs())
if sink is None:
raise QgsProcessingException(
self.invalidSinkError(parameters, self.OUTPUT))
for aFeat in inLayer.getFeatures():
if feedback.isCanceled():
break
if aFeat.id() in selFeatIds:
# Keep references to the features to eliminate
featToEliminate.append(aFeat)
else:
# write the others to output
sink.addFeature(aFeat, QgsFeatureSink.FastInsert)
# Delete all features to eliminate in processLayer
processLayer = QgsProcessingUtils.mapLayerFromString(dest_id, context)
processLayer.startEditing()
# ANALYZE
if len(featToEliminate) > 0: # Prevent zero division
start = 20.00
add = 80.00 / len(featToEliminate)
else:
start = 100
feedback.setProgress(start)
madeProgress = True
# We go through the list and see if we find any polygons we can
# merge the selected with. If we have no success with some we
# merge and then restart the whole story.
while madeProgress: # Check if we made any progress
madeProgress = False
featNotEliminated = []
# Iterate over the polygons to eliminate
for i in range(len(featToEliminate)):
if feedback.isCanceled():
break
feat = featToEliminate.pop()
geom2Eliminate = feat.geometry()
bbox = geom2Eliminate.boundingBox()
fit = processLayer.getFeatures(
QgsFeatureRequest().setFilterRect(
bbox).setSubsetOfAttributes([]))
mergeWithFid = None
mergeWithGeom = None
max = 0
min = -1
selFeat = QgsFeature()
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(
geom2Eliminate.constGet())
engine.prepareGeometry()
while fit.nextFeature(selFeat):
if feedback.isCanceled():
break
selGeom = selFeat.geometry()
if engine.intersects(selGeom.constGet()):
# We have a candidate
iGeom = geom2Eliminate.intersection(selGeom)
if not iGeom:
continue
if boundary:
selValue = iGeom.length()
else:
# area. We need a common boundary in
# order to merge
if 0 < iGeom.length():
selValue = selGeom.area()
else:
selValue = -1
if -1 != selValue:
useThis = True
if smallestArea:
if -1 == min:
min = selValue
else:
if selValue < min:
min = selValue
else:
useThis = False
else:
if selValue > max:
max = selValue
else:
useThis = False
if useThis:
mergeWithFid = selFeat.id()
mergeWithGeom = QgsGeometry(selGeom)
# End while fit
if mergeWithFid is not None:
# A successful candidate
newGeom = mergeWithGeom.combine(geom2Eliminate)
if processLayer.changeGeometry(mergeWithFid, newGeom):
madeProgress = True
else:
raise QgsProcessingException(
self.
tr('Could not replace geometry of feature with id {0}'
).format(mergeWithFid))
start = start + add
feedback.setProgress(start)
else:
featNotEliminated.append(feat)
# End for featToEliminate
featToEliminate = featNotEliminated
# End while
if not processLayer.commitChanges():
raise QgsProcessingException(self.tr('Could not commit changes'))
for feature in featNotEliminated:
if feedback.isCanceled():
break
sink.addFeature(feature, QgsFeatureSink.FastInsert)
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
if source is None:
raise QgsProcessingException(
self.invalidSourceError(parameters, self.INPUT))
join_source = self.parameterAsSource(parameters, self.JOIN, context)
if join_source is None:
raise QgsProcessingException(
self.invalidSourceError(parameters, self.JOIN))
join_fields = self.parameterAsFields(parameters, self.JOIN_FIELDS,
context)
discard_nomatch = self.parameterAsBool(parameters,
self.DISCARD_NONMATCHING,
context)
summaries = [
self.statistics[i][0] for i in sorted(
self.parameterAsEnums(parameters, self.SUMMARIES, context))
]
if not summaries:
# none selected, so use all
summaries = [s[0] for s in self.statistics]
source_fields = source.fields()
fields_to_join = QgsFields()
join_field_indexes = []
if not join_fields:
# no fields selected, use all
join_fields = [
join_source.fields().at(i).name()
for i in range(len(join_source.fields()))
]
def addFieldKeepType(original, stat):
"""
Adds a field to the output, keeping the same data type as the original
"""
field = QgsField(original)
field.setName(field.name() + '_' + stat)
fields_to_join.append(field)
def addField(original, stat, type):
"""
Adds a field to the output, with a specified type
"""
field = QgsField(original)
field.setName(field.name() + '_' + stat)
field.setType(type)
if type == QVariant.Double:
field.setLength(20)
field.setPrecision(6)
fields_to_join.append(field)
numeric_fields = (('count', QVariant.Int,
'count'), ('unique', QVariant.Int, 'variety'),
('min', QVariant.Double,
'min'), ('max', QVariant.Double,
'max'), ('range', QVariant.Double,
'range'), ('sum', QVariant.Double,
'sum'),
('mean', QVariant.Double,
'mean'), ('median', QVariant.Double, 'median'),
('stddev', QVariant.Double,
'stDev'), ('minority', QVariant.Double, 'minority'),
('majority', QVariant.Double,
'majority'), ('q1', QVariant.Double,
'firstQuartile'),
('q3', QVariant.Double,
'thirdQuartile'), ('iqr', QVariant.Double,
'interQuartileRange'))
datetime_fields = (('count', QVariant.Int, 'count'),
('unique', QVariant.Int, 'countDistinct'),
('empty', QVariant.Int, 'countMissing'),
('filled', QVariant.Int), ('min', None), ('max',
None))
string_fields = (('count', QVariant.Int,
'count'), ('unique', QVariant.Int, 'countDistinct'),
('empty', QVariant.Int, 'countMissing'),
('filled', QVariant.Int), ('min', None, 'min'),
('max', None, 'max'), ('min_length', QVariant.Int,
'minLength'),
('max_length', QVariant.Int, 'maxLength'),
('mean_length', QVariant.Double, 'meanLength'))
field_types = []
for f in join_fields:
idx = join_source.fields().lookupField(f)
if idx >= 0:
join_field_indexes.append(idx)
join_field = join_source.fields().at(idx)
if join_field.isNumeric():
field_types.append('numeric')
field_list = numeric_fields
elif join_field.type() in (QVariant.Date, QVariant.Time,
QVariant.DateTime):
field_types.append('datetime')
field_list = datetime_fields
else:
field_types.append('string')
field_list = string_fields
for f in field_list:
if f[0] in summaries:
if f[1] is not None:
addField(join_field, f[0], f[1])
else:
addFieldKeepType(join_field, f[0])
out_fields = QgsProcessingUtils.combineFields(source_fields,
fields_to_join)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT,
context, out_fields,
source.wkbType(),
source.sourceCrs())
if sink is None:
raise QgsProcessingException(
self.invalidSinkError(parameters, self.OUTPUT))
# do the join
predicates = [
self.predicates[i][0]
for i in self.parameterAsEnums(parameters, self.PREDICATE, context)
]
features = source.getFeatures()
total = 100.0 / source.featureCount() if source.featureCount() else 0
# bounding box transform
bbox_transform = QgsCoordinateTransform(source.sourceCrs(),
join_source.sourceCrs(),
context.project())
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not f.hasGeometry():
if not discard_nomatch:
# ensure consistent count of attributes - otherwise non matching
# features will have incorrect attribute length
# and provider may reject them
attrs = f.attributes()
if len(attrs) < len(out_fields):
attrs += [NULL] * (len(out_fields) - len(attrs))
f.setAttributes(attrs)
sink.addFeature(f, QgsFeatureSink.FastInsert)
continue
bbox = bbox_transform.transformBoundingBox(
f.geometry().boundingBox())
engine = None
values = []
request = QgsFeatureRequest().setFilterRect(
bbox).setSubsetOfAttributes(
join_field_indexes).setDestinationCrs(
source.sourceCrs(), context.transformContext())
for test_feat in join_source.getFeatures(request):
if feedback.isCanceled():
break
join_attributes = []
for a in join_field_indexes:
join_attributes.append(test_feat[a])
if engine is None:
engine = QgsGeometry.createGeometryEngine(
f.geometry().constGet())
engine.prepareGeometry()
for predicate in predicates:
if getattr(engine,
predicate)(test_feat.geometry().constGet()):
values.append(join_attributes)
break
feedback.setProgress(int(current * total))
if len(values) == 0:
if discard_nomatch:
continue
else:
# ensure consistent count of attributes - otherwise non matching
# features will have incorrect attribute length
# and provider may reject them
attrs = f.attributes()
if len(attrs) < len(out_fields):
attrs += [NULL] * (len(out_fields) - len(attrs))
f.setAttributes(attrs)
sink.addFeature(f, QgsFeatureSink.FastInsert)
else:
attrs = f.attributes()
for i in range(len(join_field_indexes)):
attribute_values = [v[i] for v in values]
field_type = field_types[i]
if field_type == 'numeric':
stat = QgsStatisticalSummary()
for v in attribute_values:
stat.addVariant(v)
stat.finalize()
for s in numeric_fields:
if s[0] in summaries:
attrs.append(getattr(stat, s[2])())
elif field_type == 'datetime':
stat = QgsDateTimeStatisticalSummary()
stat.calculate(attribute_values)
for s in datetime_fields:
if s[0] in summaries:
if s[0] == 'filled':
attrs.append(stat.count() -
stat.countMissing())
elif s[0] == 'min':
attrs.append(
stat.statistic(
QgsDateTimeStatisticalSummary.Min))
elif s[0] == 'max':
attrs.append(
stat.statistic(
QgsDateTimeStatisticalSummary.Max))
else:
attrs.append(getattr(stat, s[2])())
else:
stat = QgsStringStatisticalSummary()
for v in attribute_values:
if v == NULL:
stat.addString('')
else:
stat.addString(str(v))
stat.finalize()
for s in string_fields:
if s[0] in summaries:
if s[0] == 'filled':
attrs.append(stat.count() -
stat.countMissing())
else:
attrs.append(getattr(stat, s[2])())
f.setAttributes(attrs)
sink.addFeature(f, QgsFeatureSink.FastInsert)
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
line_source = self.parameterAsSource(parameters, self.LINES, context)
poly_source = self.parameterAsSource(parameters, self.POLYGONS, context)
length_field_name = self.parameterAsString(parameters, self.LEN_FIELD, context)
count_field_name = self.parameterAsString(parameters, self.COUNT_FIELD, context)
fields = poly_source.fields()
if fields.lookupField(length_field_name) < 0:
fields.append(QgsField(length_field_name, QVariant.Double))
length_field_index = fields.lookupField(length_field_name)
if fields.lookupField(count_field_name) < 0:
fields.append(QgsField(count_field_name, QVariant.Int))
count_field_index = fields.lookupField(count_field_name)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, poly_source.wkbType(), poly_source.sourceCrs())
spatialIndex = QgsSpatialIndex(line_source.getFeatures(
QgsFeatureRequest().setSubsetOfAttributes([]).setDestinationCrs(poly_source.sourceCrs(), context.transformContext())), feedback)
distArea = QgsDistanceArea()
distArea.setSourceCrs(poly_source.sourceCrs(), context.transformContext())
distArea.setEllipsoid(context.project().ellipsoid())
features = poly_source.getFeatures()
total = 100.0 / poly_source.featureCount() if poly_source.featureCount() else 0
for current, poly_feature in enumerate(features):
if feedback.isCanceled():
break
output_feature = QgsFeature()
count = 0
length = 0
if poly_feature.hasGeometry():
poly_geom = poly_feature.geometry()
has_intersections = False
lines = spatialIndex.intersects(poly_geom.boundingBox())
engine = None
if len(lines) > 0:
has_intersections = True
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(poly_geom.constGet())
engine.prepareGeometry()
if has_intersections:
request = QgsFeatureRequest().setFilterFids(lines).setSubsetOfAttributes([]).setDestinationCrs(poly_source.sourceCrs(), context.transformContext())
for line_feature in line_source.getFeatures(request):
if feedback.isCanceled():
break
if engine.intersects(line_feature.geometry().constGet()):
outGeom = poly_geom.intersection(line_feature.geometry())
length += distArea.measureLength(outGeom)
count += 1
output_feature.setGeometry(poly_geom)
attrs = poly_feature.attributes()
if length_field_index == len(attrs):
attrs.append(length)
else:
attrs[length_field_index] = length
if count_field_index == len(attrs):
attrs.append(count)
else:
attrs[count_field_index] = count
output_feature.setAttributes(attrs)
sink.addFeature(output_feature, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
spacing = self.parameterAsDouble(parameters, self.SPACING, context)
inset = self.parameterAsDouble(parameters, self.INSET, context)
randomize = self.parameterAsBool(parameters, self.RANDOMIZE, context)
isSpacing = self.parameterAsBool(parameters, self.IS_SPACING, context)
crs = self.parameterAsCrs(parameters, self.CRS, context)
extent = self.parameterAsExtent(parameters, self.EXTENT, context, crs)
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, QgsWkbTypes.Point, crs)
if sink is None:
raise QgsProcessingException(self.invalidSinkError(parameters, self.OUTPUT))
if randomize:
seed()
area = extent.width() * extent.height()
if isSpacing:
pSpacing = spacing
else:
pSpacing = sqrt(area / spacing)
f = QgsFeature()
f.initAttributes(1)
f.setFields(fields)
count = 0
id = 0
total = 100.0 / (area / pSpacing)
y = extent.yMaximum() - inset
extent_geom = QgsGeometry.fromRect(extent)
extent_engine = QgsGeometry.createGeometryEngine(extent_geom.constGet())
extent_engine.prepareGeometry()
while y >= extent.yMinimum():
x = extent.xMinimum() + inset
while x <= extent.xMaximum():
if feedback.isCanceled():
break
if randomize:
geom = QgsGeometry(QgsPoint(
uniform(x - (pSpacing / 2.0), x + (pSpacing / 2.0)),
uniform(y - (pSpacing / 2.0), y + (pSpacing / 2.0))))
else:
geom = QgsGeometry(QgsPoint(x, y))
if extent_engine.intersects(geom.constGet()):
f.setAttributes([id])
f.setGeometry(geom)
sink.addFeature(f, QgsFeatureSink.FastInsert)
x += pSpacing
id += 1
count += 1
feedback.setProgress(int(count * total))
y = y - pSpacing
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
sourceA = self.parameterAsSource(parameters, self.INPUT, context)
sourceB = self.parameterAsSource(parameters, self.OVERLAY, context)
geomType = QgsWkbTypes.multiType(sourceA.wkbType())
fields = QgsProcessingUtils.combineFields(sourceA.fields(),
sourceB.fields())
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT,
context, fields, geomType,
sourceA.sourceCrs())
featA = QgsFeature()
featB = QgsFeature()
outFeat = QgsFeature()
indexA = QgsSpatialIndex(sourceA, feedback)
indexB = QgsSpatialIndex(
sourceB.getFeatures(QgsFeatureRequest().setSubsetOfAttributes(
[]).setDestinationCrs(sourceA.sourceCrs(),
context.transformContext())), feedback)
total = 100.0 / (sourceA.featureCount() *
sourceB.featureCount()) if sourceA.featureCount(
) and sourceB.featureCount() else 1
count = 0
for featA in sourceA.getFeatures():
if feedback.isCanceled():
break
lstIntersectingB = []
geom = featA.geometry()
atMapA = featA.attributes()
intersects = indexB.intersects(geom.boundingBox())
if len(intersects) < 1:
try:
geom.convertToMultiType()
outFeat.setGeometry(geom)
outFeat.setAttributes(atMapA)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
# This really shouldn't happen, as we haven't
# edited the input geom at all
feedback.pushInfo(
self.
tr('Feature geometry error: One or more output features ignored due to invalid geometry.'
))
else:
request = QgsFeatureRequest().setFilterFids(
intersects).setSubsetOfAttributes([])
request.setDestinationCrs(sourceA.sourceCrs(),
context.transformContext())
engine = QgsGeometry.createGeometryEngine(geom.constGet())
engine.prepareGeometry()
for featB in sourceB.getFeatures(request):
atMapB = featB.attributes()
tmpGeom = featB.geometry()
if engine.intersects(tmpGeom.constGet()):
int_geom = geom.intersection(tmpGeom)
lstIntersectingB.append(tmpGeom)
if not int_geom:
# There was a problem creating the intersection
feedback.pushInfo(
self.
tr('Feature geometry error: One or more output features ignored due to invalid geometry.'
))
int_geom = QgsGeometry()
else:
int_geom = QgsGeometry(int_geom)
if int_geom.wkbType(
) == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(
int_geom.wkbType(
)) == QgsWkbTypes.GeometryCollection:
# Intersection produced different geomety types
temp_list = int_geom.asGeometryCollection()
for i in temp_list:
if i.type() == geom.type():
int_geom = QgsGeometry(i)
try:
int_geom.convertToMultiType()
outFeat.setGeometry(int_geom)
outFeat.setAttributes(atMapA + atMapB)
sink.addFeature(
outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(
self.
tr('Feature geometry error: One or more output features ignored due to invalid geometry.'
))
else:
# Geometry list: prevents writing error
# in geometries of different types
# produced by the intersection
# fix #3549
if QgsWkbTypes.geometryType(int_geom.wkbType(
)) == QgsWkbTypes.geometryType(geomType):
try:
int_geom.convertToMultiType()
outFeat.setGeometry(int_geom)
outFeat.setAttributes(atMapA + atMapB)
sink.addFeature(outFeat,
QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(
self.
tr('Feature geometry error: One or more output features ignored due to invalid geometry.'
))
# the remaining bit of featA's geometry
# if there is nothing left, this will just silently fail and we're good
diff_geom = QgsGeometry(geom)
if len(lstIntersectingB) != 0:
intB = QgsGeometry.unaryUnion(lstIntersectingB)
diff_geom = diff_geom.difference(intB)
if diff_geom.wkbType(
) == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(
diff_geom.wkbType()) == QgsWkbTypes.GeometryCollection:
temp_list = diff_geom.asGeometryCollection()
for i in temp_list:
if i.type() == geom.type():
diff_geom = QgsGeometry(i)
try:
diff_geom.convertToMultiType()
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMapA)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(
self.
tr('Feature geometry error: One or more output features ignored due to invalid geometry.'
))
count += 1
feedback.setProgress(int(count * total))
length = len(sourceA.fields())
atMapA = [None] * length
for featA in sourceB.getFeatures(QgsFeatureRequest().setDestinationCrs(
sourceA.sourceCrs(), context.transformContext())):
if feedback.isCanceled():
break
add = False
geom = featA.geometry()
diff_geom = QgsGeometry(geom)
atMap = [None] * length
atMap.extend(featA.attributes())
intersects = indexA.intersects(geom.boundingBox())
if len(intersects) < 1:
try:
geom.convertToMultiType()
outFeat.setGeometry(geom)
outFeat.setAttributes(atMap)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(
self.
tr('Feature geometry error: One or more output features ignored due to invalid geometry.'
))
else:
request = QgsFeatureRequest().setFilterFids(
intersects).setSubsetOfAttributes([])
request.setDestinationCrs(sourceA.sourceCrs(),
context.transformContext())
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(diff_geom.constGet())
engine.prepareGeometry()
for featB in sourceA.getFeatures(request):
atMapB = featB.attributes()
tmpGeom = featB.geometry()
if engine.intersects(tmpGeom.constGet()):
add = True
diff_geom = QgsGeometry(diff_geom.difference(tmpGeom))
else:
try:
# Ihis only happens if the bounding box
# intersects, but the geometry doesn't
diff_geom.convertToMultiType()
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMap)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(
self.
tr('Feature geometry error: One or more output features ignored due to invalid geometry.'
))
if add:
try:
diff_geom.convertToMultiType()
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMap)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(
self.
tr('Feature geometry error: One or more output features ignored due to invalid geometry.'
))
count += 1
feedback.setProgress(int(count * total))
return {self.OUTPUT: dest_id}
def processAlgorithm(self, feedback):
layerA = dataobjects.getLayerFromString(
self.getParameterValue(self.INPUT_A))
layerB = dataobjects.getLayerFromString(
self.getParameterValue(self.INPUT_B))
fieldA = self.getParameterValue(self.FIELD_A)
fieldB = self.getParameterValue(self.FIELD_B)
idxA = layerA.fields().lookupField(fieldA)
idxB = layerB.fields().lookupField(fieldB)
if idxA != -1:
fieldListA = QgsFields()
fieldListA.append(layerA.fields()[idxA])
else:
fieldListA = layerA.fields()
if idxB != -1:
fieldListB = QgsFields()
fieldListB.append(layerB.fields()[idxB])
else:
fieldListB = layerB.fields()
fieldListB = vector.testForUniqueness(fieldListA, fieldListB)
fieldListA.extend(fieldListB)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fieldListA, QgsWkbTypes.Point, layerA.crs())
spatialIndex = vector.spatialindex(layerB)
outFeat = QgsFeature()
features = vector.features(layerA)
total = 100.0 / len(features)
hasIntersections = False
for current, inFeatA in enumerate(features):
inGeom = inFeatA.geometry()
hasIntersections = False
lines = spatialIndex.intersects(inGeom.boundingBox())
engine = None
if len(lines) > 0:
hasIntersections = True
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
engine.prepareGeometry()
if hasIntersections:
request = QgsFeatureRequest().setFilterFids(lines)
for inFeatB in layerB.getFeatures(request):
tmpGeom = inFeatB.geometry()
points = []
attrsA = inFeatA.attributes()
if idxA != -1:
attrsA = [attrsA[idxA]]
attrsB = inFeatB.attributes()
if idxB != -1:
attrsB = [attrsB[idxB]]
if engine.intersects(tmpGeom.geometry()):
tempGeom = inGeom.intersection(tmpGeom)
if tempGeom.type() == QgsWkbTypes.PointGeometry:
if tempGeom.isMultipart():
points = tempGeom.asMultiPoint()
else:
points.append(tempGeom.asPoint())
for j in points:
outFeat.setGeometry(tempGeom.fromPoint(j))
attrsA.extend(attrsB)
outFeat.setAttributes(attrsA)
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
sourceA = self.parameterAsSource(parameters, self.INPUT, context)
sourceB = self.parameterAsSource(parameters, self.OVERLAY, context)
geomType = QgsWkbTypes.multiType(sourceA.wkbType())
fieldsA = self.parameterAsFields(parameters, self.INPUT_FIELDS,
context)
fieldsB = self.parameterAsFields(parameters, self.OVERLAY_FIELDS,
context)
fieldListA = QgsFields()
field_indices_a = []
if len(fieldsA) > 0:
for f in fieldsA:
idxA = sourceA.fields().lookupField(f)
if idxA >= 0:
field_indices_a.append(idxA)
fieldListA.append(sourceA.fields()[idxA])
else:
fieldListA = sourceA.fields()
field_indices_a = [i for i in range(0, fieldListA.count())]
fieldListB = QgsFields()
field_indices_b = []
if len(fieldsB) > 0:
for f in fieldsB:
idxB = sourceB.fields().lookupField(f)
if idxB >= 0:
field_indices_b.append(idxB)
fieldListB.append(sourceB.fields()[idxB])
else:
fieldListB = sourceB.fields()
field_indices_b = [i for i in range(0, fieldListB.count())]
fieldListB = vector.testForUniqueness(fieldListA, fieldListB)
for b in fieldListB:
fieldListA.append(b)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT,
context, fieldListA, geomType,
sourceA.sourceCrs())
outFeat = QgsFeature()
indexB = QgsSpatialIndex(
sourceB.getFeatures(QgsFeatureRequest().setSubsetOfAttributes(
[]).setDestinationCrs(sourceA.sourceCrs())), feedback)
total = 100.0 / sourceA.featureCount() if sourceA.featureCount() else 1
count = 0
for featA in sourceA.getFeatures(
QgsFeatureRequest().setSubsetOfAttributes(field_indices_a)):
if feedback.isCanceled():
break
if not featA.hasGeometry():
continue
geom = featA.geometry()
atMapA = featA.attributes()
intersects = indexB.intersects(geom.boundingBox())
request = QgsFeatureRequest().setFilterFids(intersects)
request.setDestinationCrs(sourceA.sourceCrs())
request.setSubsetOfAttributes(field_indices_b)
engine = None
if len(intersects) > 0:
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
for featB in sourceB.getFeatures(request):
if feedback.isCanceled():
break
tmpGeom = featB.geometry()
if engine.intersects(tmpGeom.geometry()):
out_attributes = [
featA.attributes()[i] for i in field_indices_a
]
out_attributes.extend(
[featB.attributes()[i] for i in field_indices_b])
int_geom = QgsGeometry(geom.intersection(tmpGeom))
if int_geom.wkbType(
) == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(
int_geom.geometry().wkbType(
)) == QgsWkbTypes.GeometryCollection:
int_com = geom.combine(tmpGeom)
int_geom = QgsGeometry()
if int_com:
int_sym = geom.symDifference(tmpGeom)
int_geom = QgsGeometry(int_com.difference(int_sym))
if int_geom.isEmpty() or not int_geom.isGeosValid():
raise QgsProcessingException(
self.tr('GEOS geoprocessing error: One or '
'more input features have invalid '
'geometry.'))
try:
if QgsWkbTypes.geometryType(int_geom.wkbType(
)) == QgsWkbTypes.geometryType(geomType):
int_geom.convertToMultiType()
outFeat.setGeometry(int_geom)
outFeat.setAttributes(out_attributes)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
raise QgsProcessingException(
self.tr('Feature geometry error: One or more '
'output features ignored due to invalid '
'geometry.'))
count += 1
feedback.setProgress(int(count * total))
return {self.OUTPUT: dest_id}
def processAlgorithm(self, progress):
inLayer = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT))
boundary = self.getParameterValue(self.MODE) == self.MODE_BOUNDARY
smallestArea = self.getParameterValue(
self.MODE) == self.MODE_SMALLEST_AREA
keepSelection = self.getParameterValue(self.KEEPSELECTION)
processLayer = vector.duplicateInMemory(inLayer)
if not keepSelection:
# Make a selection with the values provided
attribute = self.getParameterValue(self.ATTRIBUTE)
comparison = self.comparisons[self.getParameterValue(
self.COMPARISON)]
comparisonvalue = self.getParameterValue(self.COMPARISONVALUE)
selectindex = vector.resolveFieldIndex(processLayer, attribute)
selectType = processLayer.fields()[selectindex].type()
selectionError = False
if selectType in [
QVariant.Int, QVariant.LongLong, QVariant.UInt,
QVariant.ULongLong
]:
try:
y = int(comparisonvalue)
except ValueError:
selectionError = True
msg = self.tr('Cannot convert "%s" to integer' %
str(comparisonvalue))
elif selectType == QVariant.Double:
try:
y = float(comparisonvalue)
except ValueError:
selectionError = True
msg = self.tr('Cannot convert "%s" to float' %
str(comparisonvalue))
elif selectType == QVariant.String:
# 10: string, boolean
try:
y = str(comparisonvalue)
except ValueError:
selectionError = True
msg = self.tr('Cannot convert "%s" to unicode' %
str(comparisonvalue))
elif selectType == QVariant.Date:
# date
dateAndFormat = comparisonvalue.split(' ')
if len(dateAndFormat) == 1:
# QDate object
y = QLocale.system().toDate(dateAndFormat[0])
if y.isNull():
msg = self.tr(
'Cannot convert "%s" to date with system date format %s'
% (str(dateAndFormat),
QLocale.system().dateFormat()))
elif len(dateAndFormat) == 2:
y = QDate.fromString(dateAndFormat[0], dateAndFormat[1])
if y.isNull():
msg = self.tr(
'Cannot convert "%s" to date with format string "%s"'
% (str(dateAndFormat[0]), dateAndFormat[1]))
else:
y = QDate()
msg = ''
if y.isNull():
# Conversion was unsuccessfull
selectionError = True
msg += self.tr(
'Enter the date and the date format, e.g. "07.26.2011" "MM.dd.yyyy".'
)
if (comparison == 'begins with' or comparison == 'contains') \
and selectType != QVariant.String:
selectionError = True
msg = self.tr('"%s" can only be used with string fields' %
comparison)
selected = []
if selectionError:
raise GeoAlgorithmExecutionException(
self.tr('Error in selection input: %s' % msg))
else:
for feature in processLayer.getFeatures():
aValue = feature.attributes()[selectindex]
if aValue is None:
continue
if selectType in [
QVariant.Int, QVariant.LongLong, QVariant.UInt,
QVariant.ULongLong
]:
x = int(aValue)
elif selectType == QVariant.Double:
x = float(aValue)
elif selectType == QVariant.String:
# 10: string, boolean
x = str(aValue)
elif selectType == QVariant.Date:
# date
x = aValue # should be date
match = False
if comparison == '==':
match = x == y
elif comparison == '!=':
match = x != y
elif comparison == '>':
match = x > y
elif comparison == '>=':
match = x >= y
elif comparison == '<':
match = x < y
elif comparison == '<=':
match = x <= y
elif comparison == 'begins with':
match = x.startswith(y)
elif comparison == 'contains':
match = x.find(y) >= 0
if match:
selected.append(feature.id())
processLayer.selectByIds(selected)
if processLayer.selectedFeatureCount() == 0:
ProcessingLog.addToLog(
ProcessingLog.LOG_WARNING,
self.tr('%s: (No selection in input layer "%s")' %
(self.commandLineName(),
self.getParameterValue(self.INPUT))))
# Keep references to the features to eliminate
featToEliminate = []
for aFeat in processLayer.selectedFeatures():
featToEliminate.append(aFeat)
# Delete all features to eliminate in processLayer (we won't save this)
processLayer.startEditing()
processLayer.deleteSelectedFeatures()
# ANALYZE
if len(featToEliminate) > 0: # Prevent zero division
start = 20.00
add = 80.00 / len(featToEliminate)
else:
start = 100
progress.setPercentage(start)
madeProgress = True
# We go through the list and see if we find any polygons we can
# merge the selected with. If we have no success with some we
# merge and then restart the whole story.
while madeProgress: # Check if we made any progress
madeProgress = False
featNotEliminated = []
# Iterate over the polygons to eliminate
for i in range(len(featToEliminate)):
feat = featToEliminate.pop()
geom2Eliminate = feat.geometry()
bbox = geom2Eliminate.boundingBox()
fit = processLayer.getFeatures(
QgsFeatureRequest().setFilterRect(
bbox).setSubsetOfAttributes([]))
mergeWithFid = None
mergeWithGeom = None
max = 0
min = -1
selFeat = QgsFeature()
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(
geom2Eliminate.geometry())
engine.prepareGeometry()
while fit.nextFeature(selFeat):
selGeom = selFeat.geometry()
if engine.intersects(selGeom.geometry()):
# We have a candidate
iGeom = geom2Eliminate.intersection(selGeom)
if not iGeom:
continue
if boundary:
selValue = iGeom.length()
else:
# area. We need a common boundary in
# order to merge
if 0 < iGeom.length():
selValue = selGeom.area()
else:
selValue = -1
if -1 != selValue:
useThis = True
if smallestArea:
if -1 == min:
min = selValue
else:
if selValue < min:
min = selValue
else:
useThis = False
else:
if selValue > max:
max = selValue
else:
useThis = False
if useThis:
mergeWithFid = selFeat.id()
mergeWithGeom = QgsGeometry(selGeom)
# End while fit
if mergeWithFid is not None:
# A successful candidate
newGeom = mergeWithGeom.combine(geom2Eliminate)
if processLayer.changeGeometry(mergeWithFid, newGeom):
madeProgress = True
else:
raise GeoAlgorithmExecutionException(
self.
tr('Could not replace geometry of feature with id %s'
% mergeWithFid))
start = start + add
progress.setPercentage(start)
else:
featNotEliminated.append(feat)
# End for featToEliminate
featToEliminate = featNotEliminated
# End while
# Create output
output = self.getOutputFromName(self.OUTPUT)
writer = output.getVectorWriter(processLayer.fields(),
processLayer.wkbType(),
processLayer.crs())
# Write all features that are left over to output layer
iterator = processLayer.getFeatures()
for feature in iterator:
writer.addFeature(feature)
# Leave processLayer untouched
processLayer.rollBack()
for feature in featNotEliminated:
writer.addFeature(feature)
def processAlgorithm(self, parameters, context, feedback):
inLayer = self.parameterAsVectorLayer(parameters, self.INPUT, context)
boundary = self.parameterAsEnum(parameters, self.MODE, context) == self.MODE_BOUNDARY
smallestArea = self.parameterAsEnum(parameters, self.MODE, context) == self.MODE_SMALLEST_AREA
if inLayer.selectedFeatureCount() == 0:
feedback.reportError(self.tr('{0}: (No selection in input layer "{1}")').format(self.displayName(), parameters[self.INPUT]))
featToEliminate = []
selFeatIds = inLayer.selectedFeatureIds()
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
inLayer.fields(), inLayer.wkbType(), inLayer.sourceCrs())
if sink is None:
raise QgsProcessingException(self.invalidSinkError(parameters, self.OUTPUT))
for aFeat in inLayer.getFeatures():
if feedback.isCanceled():
break
if aFeat.id() in selFeatIds:
# Keep references to the features to eliminate
featToEliminate.append(aFeat)
else:
# write the others to output
sink.addFeature(aFeat, QgsFeatureSink.FastInsert)
# Delete all features to eliminate in processLayer
processLayer = QgsProcessingUtils.mapLayerFromString(dest_id, context)
processLayer.startEditing()
# ANALYZE
if len(featToEliminate) > 0: # Prevent zero division
start = 20.00
add = 80.00 / len(featToEliminate)
else:
start = 100
feedback.setProgress(start)
madeProgress = True
# We go through the list and see if we find any polygons we can
# merge the selected with. If we have no success with some we
# merge and then restart the whole story.
while madeProgress: # Check if we made any progress
madeProgress = False
featNotEliminated = []
# Iterate over the polygons to eliminate
for i in range(len(featToEliminate)):
if feedback.isCanceled():
break
feat = featToEliminate.pop()
geom2Eliminate = feat.geometry()
bbox = geom2Eliminate.boundingBox()
fit = processLayer.getFeatures(
QgsFeatureRequest().setFilterRect(bbox).setSubsetOfAttributes([]))
mergeWithFid = None
mergeWithGeom = None
max = 0
min = -1
selFeat = QgsFeature()
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(geom2Eliminate.constGet())
engine.prepareGeometry()
while fit.nextFeature(selFeat):
if feedback.isCanceled():
break
selGeom = selFeat.geometry()
if engine.intersects(selGeom.constGet()):
# We have a candidate
iGeom = geom2Eliminate.intersection(selGeom)
if not iGeom:
continue
if boundary:
selValue = iGeom.length()
else:
# area. We need a common boundary in
# order to merge
if 0 < iGeom.length():
selValue = selGeom.area()
else:
selValue = -1
if -1 != selValue:
useThis = True
if smallestArea:
if -1 == min:
min = selValue
else:
if selValue < min:
min = selValue
else:
useThis = False
else:
if selValue > max:
max = selValue
else:
useThis = False
if useThis:
mergeWithFid = selFeat.id()
mergeWithGeom = QgsGeometry(selGeom)
# End while fit
if mergeWithFid is not None:
# A successful candidate
newGeom = mergeWithGeom.combine(geom2Eliminate)
if processLayer.changeGeometry(mergeWithFid, newGeom):
madeProgress = True
else:
raise QgsProcessingException(
self.tr('Could not replace geometry of feature with id {0}').format(mergeWithFid))
start = start + add
feedback.setProgress(start)
else:
featNotEliminated.append(feat)
# End for featToEliminate
featToEliminate = featNotEliminated
# End while
if not processLayer.commitChanges():
raise QgsProcessingException(self.tr('Could not commit changes'))
for feature in featNotEliminated:
if feedback.isCanceled():
break
sink.addFeature(feature, QgsFeatureSink.FastInsert)
return {self.OUTPUT: dest_id}
def fetch_values_from_layer(self): # pylint: disable=too-many-locals, too-many-branches, too-many-statements
"""
(Re)fetches plot values from the source layer.
"""
# Note: we keep things nice and efficient and only iterate a single time over the layer!
if not self.context_generator:
context = QgsExpressionContext()
context.appendScopes(
QgsExpressionContextUtils.globalProjectLayerScopes(
self.source_layer))
else:
context = self.context_generator.createExpressionContext()
# add a new scope corresponding to the source layer -- this will potentially overwrite any other
# layer scopes which may be present in the context (e.g. from atlas layers), but we need to ensure
# that source layer fields and attributes are present in the context
context.appendScope(
self.source_layer.createExpressionContextScope())
self.settings.data_defined_properties.prepare(context)
self.fetch_layout_properties(context)
def add_source_field_or_expression(field_or_expression):
field_index = self.source_layer.fields().lookupField(
field_or_expression)
if field_index == -1:
expression = QgsExpression(field_or_expression)
if not expression.hasParserError():
expression.prepare(context)
return expression, expression.needsGeometry(
), expression.referencedColumns()
return None, False, {field_or_expression}
x_expression, x_needs_geom, x_attrs = add_source_field_or_expression(self.settings.properties['x_name']) if \
self.settings.properties[
'x_name'] else (None, False, set())
y_expression, y_needs_geom, y_attrs = add_source_field_or_expression(self.settings.properties['y_name']) if \
self.settings.properties[
'y_name'] else (None, False, set())
z_expression, z_needs_geom, z_attrs = add_source_field_or_expression(self.settings.properties['z_name']) if \
self.settings.properties[
'z_name'] else (None, False, set())
additional_info_expression, additional_needs_geom, additional_attrs = add_source_field_or_expression(
self.settings.layout['additional_info_expression']
) if self.settings.layout['additional_info_expression'] else (None,
False,
set())
attrs = set().union(
self.settings.data_defined_properties.referencedFields(), x_attrs,
y_attrs, z_attrs, additional_attrs)
request = QgsFeatureRequest()
if self.settings.data_defined_properties.property(
PlotSettings.PROPERTY_FILTER).isActive():
expression = self.settings.data_defined_properties.property(
PlotSettings.PROPERTY_FILTER).asExpression()
request.setFilterExpression(expression)
request.setExpressionContext(context)
request.setSubsetOfAttributes(attrs, self.source_layer.fields())
if not x_needs_geom and not y_needs_geom and not z_needs_geom and not additional_needs_geom and not self.settings.data_defined_properties.hasActiveProperties(
):
request.setFlags(QgsFeatureRequest.NoGeometry)
visible_geom_engine = None
if self.visible_features_only and self.visible_region is not None:
ct = QgsCoordinateTransform(
self.visible_region.crs(), self.source_layer.crs(),
QgsProject.instance().transformContext())
try:
rect = ct.transformBoundingBox(self.visible_region)
request.setFilterRect(rect)
except QgsCsException:
pass
elif self.visible_features_only and self.polygon_filter is not None:
ct = QgsCoordinateTransform(
self.polygon_filter.crs(), self.source_layer.crs(),
QgsProject.instance().transformContext())
try:
rect = ct.transformBoundingBox(
self.polygon_filter.geometry.boundingBox())
request.setFilterRect(rect)
g = self.polygon_filter.geometry
g.transform(ct)
visible_geom_engine = QgsGeometry.createGeometryEngine(
g.constGet())
visible_geom_engine.prepareGeometry()
except QgsCsException:
pass
if self.selected_features_only:
it = self.source_layer.getSelectedFeatures(request)
else:
it = self.source_layer.getFeatures(request)
# Some plot types don't draw individual glyphs for each feature, but aggregate them instead.
# In that case it doesn't make sense to evaluate expressions for settings like marker size or color for each
# feature. Instead, the evaluation should be executed only once for these settings.
aggregating = self.settings.plot_type in ['box', 'histogram']
executed = False
xx = []
yy = []
zz = []
additional_hover_text = []
marker_sizes = []
colors = []
stroke_colors = []
stroke_widths = []
for f in it:
if visible_geom_engine and not visible_geom_engine.intersects(
f.geometry().constGet()):
continue
self.settings.feature_ids.append(f.id())
context.setFeature(f)
x = None
if x_expression:
x = x_expression.evaluate(context)
if x == NULL or x is None:
continue
elif self.settings.properties['x_name']:
x = f[self.settings.properties['x_name']]
if x == NULL or x is None:
continue
y = None
if y_expression:
y = y_expression.evaluate(context)
if y == NULL or y is None:
continue
elif self.settings.properties['y_name']:
y = f[self.settings.properties['y_name']]
if y == NULL or y is None:
continue
z = None
if z_expression:
z = z_expression.evaluate(context)
if z == NULL or z is None:
continue
elif self.settings.properties['z_name']:
z = f[self.settings.properties['z_name']]
if z == NULL or z is None:
continue
if additional_info_expression:
additional_hover_text.append(
additional_info_expression.evaluate(context))
elif self.settings.layout['additional_info_expression']:
additional_hover_text.append(
f[self.settings.layout['additional_info_expression']])
if x is not None:
xx.append(x)
if y is not None:
yy.append(y)
if z is not None:
zz.append(z)
if self.settings.data_defined_properties.isActive(
PlotSettings.PROPERTY_MARKER_SIZE):
default_value = self.settings.properties['marker_size']
context.setOriginalValueVariable(default_value)
value, _ = self.settings.data_defined_properties.valueAsDouble(
PlotSettings.PROPERTY_MARKER_SIZE, context, default_value)
marker_sizes.append(value)
if self.settings.data_defined_properties.isActive(
PlotSettings.PROPERTY_STROKE_WIDTH):
default_value = self.settings.properties['marker_width']
context.setOriginalValueVariable(default_value)
value, _ = self.settings.data_defined_properties.valueAsDouble(
PlotSettings.PROPERTY_STROKE_WIDTH, context, default_value)
stroke_widths.append(value)
if self.settings.data_defined_properties.isActive(
PlotSettings.PROPERTY_COLOR) and (not aggregating
or not executed):
default_value = QColor(self.settings.properties['in_color'])
value, conversion_success = self.settings.data_defined_properties.valueAsColor(
PlotSettings.PROPERTY_COLOR, context, default_value)
if conversion_success:
# We were given a valid color specification, use that color
colors.append(value.name())
else:
try:
# Attempt to interpret the value as a list of color specifications
value_list = self.settings.data_defined_properties.value(
PlotSettings.PROPERTY_COLOR, context)
color_list = [
QgsSymbolLayerUtils.decodeColor(item).name()
for item in value_list
]
colors.extend(color_list)
except TypeError:
# Not a list of color specifications, use the default color instead
colors.append(default_value.name())
if self.settings.data_defined_properties.isActive(
PlotSettings.PROPERTY_STROKE_COLOR) and (not aggregating
or not executed):
default_value = QColor(self.settings.properties['out_color'])
value, conversion_success = self.settings.data_defined_properties.valueAsColor(
PlotSettings.PROPERTY_STROKE_COLOR, context, default_value)
if conversion_success:
# We were given a valid color specification, use that color
stroke_colors.append(value.name())
else:
try:
# Attempt to interpret the value as a list of color specifications
value_list = self.settings.data_defined_properties.value(
PlotSettings.PROPERTY_STROKE_COLOR, context)
color_list = [
QgsSymbolLayerUtils.decodeColor(item).name()
for item in value_list
]
stroke_colors.extend(color_list)
except TypeError:
# Not a list of color specifications, use the default color instead
stroke_colors.append(default_value.name())
executed = True
self.settings.additional_hover_text = additional_hover_text
self.settings.x = xx
self.settings.y = yy
self.settings.z = zz
if marker_sizes:
self.settings.data_defined_marker_sizes = marker_sizes
if colors:
self.settings.data_defined_colors = colors
if stroke_colors:
self.settings.data_defined_stroke_colors = stroke_colors
if stroke_widths:
self.settings.data_defined_stroke_widths = stroke_widths
def clip(layer_to_clip, mask_layer, callback=None):
"""Clip a vector layer with another.
Issue https://github.com/inasafe/inasafe/issues/3186
Note : This algorithm is copied from :
https://github.com/qgis/QGIS/blob/master/python/plugins/processing/algs/
qgis/Clip.py
:param layer_to_clip: The vector layer to clip.
:type layer_to_clip: QgsVectorLayer
:param mask_layer: The vector layer to use for clipping.
:type mask_layer: QgsVectorLayer
:param callback: A function to all to indicate progress. The function
should accept params 'current' (int), 'maximum' (int) and 'step' (str).
Defaults to None.
:type callback: function
:return: The clip vector layer.
:rtype: QgsVectorLayer
.. versionadded:: 4.0
"""
output_layer_name = clip_steps['output_layer_name']
output_layer_name = output_layer_name % (
layer_to_clip.keywords['layer_purpose'])
processing_step = clip_steps['step_name']
writer = create_memory_layer(
output_layer_name,
layer_to_clip.geometryType(),
layer_to_clip.crs(),
layer_to_clip.fields()
)
writer.startEditing()
# Begin copy/paste from Processing plugin.
# Please follow their code as their code is optimized.
# The code below is not following our coding standards because we want to
# be able to track any diffs from QGIS easily.
# first build up a list of clip geometries
clip_geometries = []
request = QgsFeatureRequest().setSubsetOfAttributes([])
for mask_feature in mask_layer.getFeatures(request):
clip_geometries.append(QgsGeometry(mask_feature.geometry()))
# are we clipping against a single feature? if so,
# we can show finer progress reports
if len(clip_geometries) > 1:
# noinspection PyTypeChecker,PyCallByClass,PyArgumentList
combined_clip_geom = QgsGeometry.unaryUnion(clip_geometries)
single_clip_feature = False
else:
combined_clip_geom = clip_geometries[0]
single_clip_feature = True
# use prepared geometries for faster intersection tests
# noinspection PyArgumentList
engine = QgsGeometry.createGeometryEngine(combined_clip_geom.geometry())
engine.prepareGeometry()
tested_feature_ids = set()
for i, clip_geom in enumerate(clip_geometries):
request = QgsFeatureRequest().setFilterRect(clip_geom.boundingBox())
input_features = [f for f in layer_to_clip.getFeatures(request)]
if not input_features:
continue
if single_clip_feature:
total = 100.0 / len(input_features)
else:
total = 0
for current, in_feat in enumerate(input_features):
if not in_feat.geometry():
continue
if in_feat.id() in tested_feature_ids:
# don't retest a feature we have already checked
continue
tested_feature_ids.add(in_feat.id())
if not engine.intersects(in_feat.geometry().geometry()):
continue
if not engine.contains(in_feat.geometry().geometry()):
cur_geom = in_feat.geometry()
new_geom = combined_clip_geom.intersection(cur_geom)
if new_geom.wkbType() == QgsWKBTypes.Unknown \
or QgsWKBTypes.flatType(
new_geom.geometry().wkbType()) == \
QgsWKBTypes.GeometryCollection:
int_com = in_feat.geometry().combine(new_geom)
int_sym = in_feat.geometry().symDifference(new_geom)
if not int_com or not int_sym:
# LOGGER.debug(
# tr('GEOS geoprocessing error: One or more input '
# 'features have invalid geometry.'))
pass
else:
new_geom = int_com.difference(int_sym)
if new_geom.isGeosEmpty()\
or not new_geom.isGeosValid():
# LOGGER.debug(
# tr('GEOS geoprocessing error: One or more '
# 'input features have invalid geometry.'))
pass
else:
# clip geometry totally contains feature geometry,
# so no need to perform intersection
new_geom = in_feat.geometry()
try:
out_feat = QgsFeature()
out_feat.setGeometry(new_geom)
out_feat.setAttributes(in_feat.attributes())
if new_geom.type() == layer_to_clip.geometryType():
writer.addFeature(out_feat)
except:
LOGGER.debug(
tr('Feature geometry error: One or more output features '
'ignored due to invalid geometry.'))
continue
# TODO implement callback
if single_clip_feature:
# progress.setPercentage(int(current * total))
pass
if not single_clip_feature:
# coarse progress report for multiple clip geometries
# progress.setPercentage(100.0 * i / len(clip_geoms))
pass
# End copy/paste from Processing plugin.
writer.commitChanges()
writer.keywords = layer_to_clip.keywords.copy()
writer.keywords['title'] = output_layer_name
check_layer(writer)
return writer
def processAlgorithm(self, progress):
lineLayer = dataobjects.getObjectFromUri(self.getParameterValue(self.LINES))
polyLayer = dataobjects.getObjectFromUri(self.getParameterValue(self.POLYGONS))
lengthFieldName = self.getParameterValue(self.LEN_FIELD)
countFieldName = self.getParameterValue(self.COUNT_FIELD)
(idxLength, fieldList) = vector.findOrCreateField(polyLayer,
polyLayer.fields(), lengthFieldName)
(idxCount, fieldList) = vector.findOrCreateField(polyLayer, fieldList,
countFieldName)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fieldList.toList(), polyLayer.wkbType(), polyLayer.crs())
spatialIndex = vector.spatialindex(lineLayer)
ftLine = QgsFeature()
ftPoly = QgsFeature()
outFeat = QgsFeature()
inGeom = QgsGeometry()
outGeom = QgsGeometry()
distArea = QgsDistanceArea()
features = vector.features(polyLayer)
total = 100.0 / len(features)
hasIntersections = False
for current, ftPoly in enumerate(features):
inGeom = ftPoly.geometry()
attrs = ftPoly.attributes()
count = 0
length = 0
hasIntersections = False
lines = spatialIndex.intersects(inGeom.boundingBox())
engine = None
if len(lines) > 0:
hasIntersections = True
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
engine.prepareGeometry()
if hasIntersections:
request = QgsFeatureRequest().setFilterFids(lines).setSubsetOfAttributes([])
for ftLine in lineLayer.getFeatures(request):
tmpGeom = ftLine.geometry()
if engine.intersects(tmpGeom.geometry()):
outGeom = inGeom.intersection(tmpGeom)
length += distArea.measureLength(outGeom)
count += 1
outFeat.setGeometry(inGeom)
if idxLength == len(attrs):
attrs.append(length)
else:
attrs[idxLength] = length
if idxCount == len(attrs):
attrs.append(count)
else:
attrs[idxCount] = count
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
progress.setPercentage(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
lineLayer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.LINES), context)
polyLayer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.POLYGONS), context)
lengthFieldName = self.getParameterValue(self.LEN_FIELD)
countFieldName = self.getParameterValue(self.COUNT_FIELD)
(idxLength,
fieldList) = vector.findOrCreateField(polyLayer, polyLayer.fields(),
lengthFieldName)
(idxCount,
fieldList) = vector.findOrCreateField(polyLayer, fieldList,
countFieldName)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fieldList, polyLayer.wkbType(), polyLayer.crs(), context)
spatialIndex = QgsProcessingUtils.createSpatialIndex(
lineLayer, context)
ftLine = QgsFeature()
ftPoly = QgsFeature()
outFeat = QgsFeature()
inGeom = QgsGeometry()
outGeom = QgsGeometry()
distArea = QgsDistanceArea()
features = QgsProcessingUtils.getFeatures(polyLayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(polyLayer, context)
hasIntersections = False
for current, ftPoly in enumerate(features):
inGeom = ftPoly.geometry()
attrs = ftPoly.attributes()
count = 0
length = 0
hasIntersections = False
lines = spatialIndex.intersects(inGeom.boundingBox())
engine = None
if len(lines) > 0:
hasIntersections = True
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
engine.prepareGeometry()
if hasIntersections:
request = QgsFeatureRequest().setFilterFids(
lines).setSubsetOfAttributes([])
for ftLine in lineLayer.getFeatures(request):
tmpGeom = ftLine.geometry()
if engine.intersects(tmpGeom.geometry()):
outGeom = inGeom.intersection(tmpGeom)
length += distArea.measureLength(outGeom)
count += 1
outFeat.setGeometry(inGeom)
if idxLength == len(attrs):
attrs.append(length)
else:
attrs[idxLength] = length
if idxCount == len(attrs):
attrs.append(count)
else:
attrs[idxCount] = count
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
if source is None:
raise QgsProcessingException(
self.invalidSourceError(parameters, self.INPUT))
extent = self.parameterAsExtent(parameters, self.TARGET_AREA, context)
target_crs = self.parameterAsCrs(parameters, self.TARGET_AREA_CRS,
context)
target_geom = QgsGeometry.fromRect(extent)
fields = QgsFields()
fields.append(QgsField('auth_id', QVariant.String, '', 20))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT,
context, fields,
QgsWkbTypes.NoGeometry,
QgsCoordinateReferenceSystem())
if sink is None:
raise QgsProcessingException(
self.invalidSinkError(parameters, self.OUTPUT))
# make intersection tests nice and fast
engine = QgsGeometry.createGeometryEngine(target_geom.constGet())
engine.prepareGeometry()
layer_bounds = QgsGeometry.fromRect(source.sourceExtent())
crses_to_check = QgsCoordinateReferenceSystem.validSrsIds()
total = 100.0 / len(crses_to_check)
found_results = 0
transform_context = QgsCoordinateTransformContext()
for current, srs_id in enumerate(crses_to_check):
if feedback.isCanceled():
break
candidate_crs = QgsCoordinateReferenceSystem.fromSrsId(srs_id)
if not candidate_crs.isValid():
continue
transform_candidate = QgsCoordinateTransform(
candidate_crs, target_crs, transform_context)
transformed_bounds = QgsGeometry(layer_bounds)
try:
if not transformed_bounds.transform(transform_candidate) == 0:
continue
except:
continue
try:
if engine.intersects(transformed_bounds.constGet()):
feedback.pushInfo(
self.tr('Found candidate CRS: {}').format(
candidate_crs.authid()))
f = QgsFeature(fields)
f.setAttributes([candidate_crs.authid()])
sink.addFeature(f, QgsFeatureSink.FastInsert)
found_results += 1
except:
continue
feedback.setProgress(int(current * total))
if found_results == 0:
feedback.reportError(self.tr('No matching projections found'))
return {self.OUTPUT: dest_id}
def processAlgorithm(self, feedback):
vlayerA = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT))
vlayerB = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT2))
geomType = QgsWkbTypes.multiType(vlayerA.wkbType())
fields = vector.combineVectorFields(vlayerA, vlayerB)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fields, geomType, vlayerA.crs())
outFeat = QgsFeature()
index = vector.spatialindex(vlayerB)
selectionA = vector.features(vlayerA)
total = 100.0 / len(selectionA)
for current, inFeatA in enumerate(selectionA):
feedback.setProgress(int(current * total))
geom = inFeatA.geometry()
atMapA = inFeatA.attributes()
intersects = index.intersects(geom.boundingBox())
request = QgsFeatureRequest().setFilterFids(intersects)
engine = None
if len(intersects) > 0:
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
for inFeatB in vlayerB.getFeatures(request):
tmpGeom = inFeatB.geometry()
if engine.intersects(tmpGeom.geometry()):
atMapB = inFeatB.attributes()
int_geom = QgsGeometry(geom.intersection(tmpGeom))
if int_geom.wkbType(
) == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(
int_geom.geometry().wkbType(
)) == QgsWkbTypes.GeometryCollection:
int_com = geom.combine(tmpGeom)
int_geom = QgsGeometry()
if int_com:
int_sym = geom.symDifference(tmpGeom)
int_geom = QgsGeometry(int_com.difference(int_sym))
if int_geom.isEmpty() or not int_geom.isGeosValid():
ProcessingLog.addToLog(
ProcessingLog.LOG_ERROR,
self.tr('GEOS geoprocessing error: One or '
'more input features have invalid '
'geometry.'))
try:
if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[
int_geom.wkbType()]]:
outFeat.setGeometry(int_geom)
attrs = []
attrs.extend(atMapA)
attrs.extend(atMapB)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
except:
ProcessingLog.addToLog(
ProcessingLog.LOG_INFO,
self.
tr('Feature geometry error: One or more output features ignored due to invalid geometry.'
))
continue
del writer
def processAlgorithm(self, parameters, context, feedback):
poly_source = self.parameterAsSource(parameters, self.POLYGONS,
context)
point_source = self.parameterAsSource(parameters, self.POINTS, context)
if point_source is None:
raise QgsProcessingException(
self.invalidSourceError(parameters, self.POINTS))
field_name = self.parameterAsString(parameters, self.FIELD, context)
self.field_name = field_name
if poly_source is None:
fields = QgsFields()
fields.append(QgsField("fid", QVariant.Int, "int", 9, 0))
else:
fields = poly_source.fields()
if fields.lookupField(field_name) < 0:
fields.append(QgsField(field_name, QVariant.LongLong))
field_index = fields.lookupField(field_name)
(sink, self.dest_id) = self.parameterAsSink(
parameters, self.OUTPUT, context, fields, point_source.wkbType(),
point_source.sourceCrs() if poly_source is None else
poly_source.sourceCrs(), QgsFeatureSink.RegeneratePrimaryKey)
if sink is None:
raise QgsProcessingException(
self.invalidSinkError(parameters, self.OUTPUT))
maximumValue = 0
if poly_source is None:
features = point_source.getFeatures()
total = 100.0 / point_source.featureCount(
) if point_source.featureCount() else 0
feedback.pushInfo('Number of points {}'.format(
point_source.featureCount()))
points = {}
for current, point_feature in enumerate(features):
if feedback.isCanceled():
break
point = point_feature.geometry().asPoint()
idList = []
key = str(point.x()) + "_" + str(point.y())
if key in points:
idList = points[key][1]
idList.append(point_feature.id())
points[key] = [point, idList]
for i, key in enumerate(points):
if feedback.isCanceled():
break
point = points[key][0]
output_feature = QgsFeature()
inGeom = QgsGeometry()
output_feature.setGeometry(inGeom.fromPointXY(point))
output_feature.setAttributes([i, len(points[key][1])])
sink.addFeature(output_feature, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
else:
features = poly_source.getFeatures()
total = 100.0 / poly_source.featureCount(
) if poly_source.featureCount() else 0
for current, polygon_feature in enumerate(features):
if feedback.isCanceled():
break
count = 0
output_feature = QgsFeature()
if polygon_feature.hasGeometry():
geom = polygon_feature.geometry()
engine = QgsGeometry.createGeometryEngine(geom.constGet())
engine.prepareGeometry()
count = 0
request = QgsFeatureRequest().setFilterRect(
geom.boundingBox()).setDestinationCrs(
poly_source.sourceCrs(),
context.transformContext())
for point_feature in point_source.getFeatures(request):
if feedback.isCanceled():
break
if engine.contains(
point_feature.geometry().constGet()):
count += 1
output_feature.setGeometry(geom.centroid())
attrs = polygon_feature.attributes()
score = count
if field_index == len(attrs):
attrs.append(score)
else:
attrs[field_index] = score
output_feature.setAttributes(attrs)
sink.addFeature(output_feature, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
return {self.OUTPUT: self.dest_id}
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
line_source = self.parameterAsSource(parameters, self.LINES, context)
sameLayer = parameters[self.INPUT] == parameters[self.LINES]
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
source.fields(), QgsWkbTypes.multiType(source.wkbType()), source.sourceCrs())
spatialIndex = QgsSpatialIndex()
splitGeoms = {}
request = QgsFeatureRequest()
request.setSubsetOfAttributes([])
request.setDestinationCrs(source.sourceCrs())
for aSplitFeature in line_source.getFeatures(request):
if feedback.isCanceled():
break
splitGeoms[aSplitFeature.id()] = aSplitFeature.geometry()
spatialIndex.insertFeature(aSplitFeature)
# honor the case that user has selection on split layer and has setting "use selection"
outFeat = QgsFeature()
features = source.getFeatures()
total = 100.0 / source.featureCount() if source.featureCount() else 100
for current, inFeatA in enumerate(features):
if feedback.isCanceled():
break
inGeom = inFeatA.geometry()
attrsA = inFeatA.attributes()
outFeat.setAttributes(attrsA)
if inGeom.isMultipart():
inGeoms = []
for g in inGeom.asGeometryCollection():
inGeoms.append(g)
else:
inGeoms = [inGeom]
lines = spatialIndex.intersects(inGeom.boundingBox())
if len(lines) > 0: # has intersection of bounding boxes
splittingLines = []
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
engine.prepareGeometry()
for i in lines:
try:
splitGeom = splitGeoms[i]
except:
continue
# check if trying to self-intersect
if sameLayer:
if inFeatA.id() == i:
continue
if engine.intersects(splitGeom.geometry()):
splittingLines.append(splitGeom)
if len(splittingLines) > 0:
for splitGeom in splittingLines:
splitterPList = None
outGeoms = []
split_geom_engine = QgsGeometry.createGeometryEngine(splitGeom.geometry())
split_geom_engine.prepareGeometry()
while len(inGeoms) > 0:
if feedback.isCanceled():
break
inGeom = inGeoms.pop()
if inGeom.isNull(): # this has been encountered and created a run-time error
continue
if split_geom_engine.intersects(inGeom.geometry()):
inPoints = vector.extractPoints(inGeom)
if splitterPList is None:
splitterPList = vector.extractPoints(splitGeom)
try:
result, newGeometries, topoTestPoints = inGeom.splitGeometry(splitterPList, False)
except:
feedback.reportError(self.tr('Geometry exception while splitting'))
result = 1
# splitGeometry: If there are several intersections
# between geometry and splitLine, only the first one is considered.
if result == 0: # split occurred
if inPoints == vector.extractPoints(inGeom):
# bug in splitGeometry: sometimes it returns 0 but
# the geometry is unchanged
outGeoms.append(inGeom)
else:
inGeoms.append(inGeom)
for aNewGeom in newGeometries:
inGeoms.append(aNewGeom)
else:
outGeoms.append(inGeom)
else:
outGeoms.append(inGeom)
inGeoms = outGeoms
parts = []
for aGeom in inGeoms:
if feedback.isCanceled():
break
passed = True
if QgsWkbTypes.geometryType(aGeom.wkbType()) == QgsWkbTypes.LineGeometry:
numPoints = aGeom.geometry().numPoints()
if numPoints <= 2:
if numPoints == 2:
passed = not aGeom.geometry().isClosed() # tests if vertex 0 = vertex 1
else:
passed = False
# sometimes splitting results in lines of zero length
if passed:
parts.append(aGeom)
if len(parts) > 0:
outFeat.setGeometry(QgsGeometry.collectGeometry(parts))
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
if source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
join_source = self.parameterAsSource(parameters, self.JOIN, context)
if join_source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.JOIN))
join_fields = self.parameterAsFields(parameters, self.JOIN_FIELDS, context)
method = self.parameterAsEnum(parameters, self.METHOD, context)
discard_nomatch = self.parameterAsBool(parameters, self.DISCARD_NONMATCHING, context)
prefix = self.parameterAsString(parameters, self.PREFIX, context)
source_fields = source.fields()
fields_to_join = QgsFields()
join_field_indexes = []
if not join_fields:
fields_to_join = join_source.fields()
join_field_indexes = [i for i in range(len(fields_to_join))]
else:
for f in join_fields:
idx = join_source.fields().lookupField(f)
join_field_indexes.append(idx)
if idx >= 0:
fields_to_join.append(join_source.fields().at(idx))
if prefix:
prefixed_fields = QgsFields()
for i in range(len(fields_to_join)):
field = fields_to_join[i]
field.setName(prefix + field.name())
prefixed_fields.append(field)
fields_to_join = prefixed_fields
out_fields = QgsProcessingUtils.combineFields(source_fields, fields_to_join)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
out_fields, source.wkbType(), source.sourceCrs(), QgsFeatureSink.RegeneratePrimaryKey)
if self.OUTPUT in parameters and parameters[self.OUTPUT] is not None and sink is None:
raise QgsProcessingException(self.invalidSinkError(parameters, self.OUTPUT))
(non_matching_sink, non_matching_dest_id) = self.parameterAsSink(parameters, self.NON_MATCHING, context,
source.fields(), source.wkbType(), source.sourceCrs(), QgsFeatureSink.RegeneratePrimaryKey)
if self.NON_MATCHING in parameters and parameters[self.NON_MATCHING] is not None and non_matching_sink is None:
raise QgsProcessingException(self.invalidSinkError(parameters, self.NON_MATCHING))
# do the join
# build a list of 'reversed' predicates, because in this function
# we actually test the reverse of what the user wants (allowing us
# to prepare geometries and optimise the algorithm)
predicates = [self.reversed_predicates[self.predicates[i][0]] for i in
self.parameterAsEnums(parameters, self.PREDICATE, context)]
remaining = set()
if not discard_nomatch or non_matching_sink is not None:
remaining = set(source.allFeatureIds())
added_set = set()
request = QgsFeatureRequest().setSubsetOfAttributes(join_field_indexes).setDestinationCrs(source.sourceCrs(), context.transformContext())
features = join_source.getFeatures(request)
total = 100.0 / join_source.featureCount() if join_source.featureCount() else 0
joined_count = 0
unjoined_count = 0
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not f.hasGeometry():
continue
bbox = f.geometry().boundingBox()
engine = None
request = QgsFeatureRequest().setFilterRect(bbox)
for test_feat in source.getFeatures(request):
if feedback.isCanceled():
break
if method == 1 and test_feat.id() in added_set:
# already added this feature, and user has opted to only output first match
continue
join_attributes = []
for a in join_field_indexes:
join_attributes.append(f[a])
if engine is None:
engine = QgsGeometry.createGeometryEngine(f.geometry().constGet())
engine.prepareGeometry()
for predicate in predicates:
if getattr(engine, predicate)(test_feat.geometry().constGet()):
added_set.add(test_feat.id())
if sink is not None:
# join attributes and add
attributes = test_feat.attributes()
attributes.extend(join_attributes)
output_feature = test_feat
output_feature.setAttributes(attributes)
sink.addFeature(output_feature, QgsFeatureSink.FastInsert)
break
feedback.setProgress(int(current * total))
if not discard_nomatch or non_matching_sink is not None:
remaining = remaining.difference(added_set)
for f in source.getFeatures(QgsFeatureRequest().setFilterFids(list(remaining))):
if feedback.isCanceled():
break
if sink is not None:
sink.addFeature(f, QgsFeatureSink.FastInsert)
if non_matching_sink is not None:
non_matching_sink.addFeature(f, QgsFeatureSink.FastInsert)
result = {}
if sink is not None:
result[self.OUTPUT] = dest_id
if non_matching_sink is not None:
result[self.NON_MATCHING] = non_matching_dest_id
result[self.JOINED_COUNT] = len(added_set)
return result
def processAlgorithm(self, feedback):
extent = str(self.getParameterValue(self.EXTENT)).split(',')
spacing = float(self.getParameterValue(self.SPACING))
inset = float(self.getParameterValue(self.INSET))
randomize = self.getParameterValue(self.RANDOMIZE)
isSpacing = self.getParameterValue(self.IS_SPACING)
crsId = self.getParameterValue(self.CRS)
crs = QgsCoordinateReferenceSystem()
crs.createFromUserInput(crsId)
extent = QgsRectangle(float(extent[0]), float(extent[2]),
float(extent[1]), float(extent[3]))
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fields, QgsWkbTypes.Point, crs)
if randomize:
seed()
area = extent.width() * extent.height()
if isSpacing:
pSpacing = spacing
else:
pSpacing = sqrt(area / spacing)
f = QgsFeature()
f.initAttributes(1)
f.setFields(fields)
count = 0
total = 100.0 / (area / pSpacing)
y = extent.yMaximum() - inset
extent_geom = QgsGeometry.fromRect(extent)
extent_engine = QgsGeometry.createGeometryEngine(
extent_geom.geometry())
extent_engine.prepareGeometry()
while y >= extent.yMinimum():
x = extent.xMinimum() + inset
while x <= extent.xMaximum():
if randomize:
geom = QgsGeometry().fromPoint(
QgsPoint(
uniform(x - (pSpacing / 2.0),
x + (pSpacing / 2.0)),
uniform(y - (pSpacing / 2.0),
y + (pSpacing / 2.0))))
else:
geom = QgsGeometry().fromPoint(QgsPoint(x, y))
if extent_engine.intersects(geom.geometry()):
f.setAttribute('id', count)
f.setGeometry(geom)
writer.addFeature(f)
x += pSpacing
count += 1
feedback.setProgress(int(count * total))
y = y - pSpacing
del writer
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
join_source = self.parameterAsSource(parameters, self.JOIN, context)
join_fields = self.parameterAsFields(parameters, self.JOIN_FIELDS, context)
discard_nomatch = self.parameterAsBool(parameters, self.DISCARD_NONMATCHING, context)
summaries = [self.statistics[i][0] for i in
sorted(self.parameterAsEnums(parameters, self.SUMMARIES, context))]
if not summaries:
# none selected, so use all
summaries = [s[0] for s in self.statistics]
source_fields = source.fields()
fields_to_join = QgsFields()
join_field_indexes = []
if not join_fields:
# no fields selected, use all
join_fields = [join_source.fields().at(i).name() for i in range(len(join_source.fields()))]
def addFieldKeepType(original, stat):
"""
Adds a field to the output, keeping the same data type as the original
"""
field = QgsField(original)
field.setName(field.name() + '_' + stat)
fields_to_join.append(field)
def addField(original, stat, type):
"""
Adds a field to the output, with a specified type
"""
field = QgsField(original)
field.setName(field.name() + '_' + stat)
field.setType(type)
if type == QVariant.Double:
field.setLength(20)
field.setPrecision(6)
fields_to_join.append(field)
numeric_fields = (
('count', QVariant.Int, 'count'),
('unique', QVariant.Int, 'variety'),
('min', QVariant.Double, 'min'),
('max', QVariant.Double, 'max'),
('range', QVariant.Double, 'range'),
('sum', QVariant.Double, 'sum'),
('mean', QVariant.Double, 'mean'),
('median', QVariant.Double, 'median'),
('stddev', QVariant.Double, 'stDev'),
('minority', QVariant.Double, 'minority'),
('majority', QVariant.Double, 'majority'),
('q1', QVariant.Double, 'firstQuartile'),
('q3', QVariant.Double, 'thirdQuartile'),
('iqr', QVariant.Double, 'interQuartileRange')
)
datetime_fields = (
('count', QVariant.Int, 'count'),
('unique', QVariant.Int, 'countDistinct'),
('empty', QVariant.Int, 'countMissing'),
('filled', QVariant.Int),
('min', None),
('max', None)
)
string_fields = (
('count', QVariant.Int, 'count'),
('unique', QVariant.Int, 'countDistinct'),
('empty', QVariant.Int, 'countMissing'),
('filled', QVariant.Int),
('min', None, 'min'),
('max', None, 'max'),
('min_length', QVariant.Int, 'minLength'),
('max_length', QVariant.Int, 'maxLength'),
('mean_length', QVariant.Double, 'meanLength')
)
field_types = []
for f in join_fields:
idx = join_source.fields().lookupField(f)
if idx >= 0:
join_field_indexes.append(idx)
join_field = join_source.fields().at(idx)
if join_field.isNumeric():
field_types.append('numeric')
field_list = numeric_fields
elif join_field.type() in (QVariant.Date, QVariant.Time, QVariant.DateTime):
field_types.append('datetime')
field_list = datetime_fields
else:
field_types.append('string')
field_list = string_fields
for f in field_list:
if f[0] in summaries:
if f[1] is not None:
addField(join_field, f[0], f[1])
else:
addFieldKeepType(join_field, f[0])
out_fields = QgsProcessingUtils.combineFields(source_fields, fields_to_join)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
out_fields, source.wkbType(), source.sourceCrs())
# do the join
predicates = [self.predicates[i][0] for i in self.parameterAsEnums(parameters, self.PREDICATE, context)]
features = source.getFeatures()
total = 100.0 / source.featureCount() if source.featureCount() else 0
# bounding box transform
bbox_transform = QgsCoordinateTransform(source.sourceCrs(), join_source.sourceCrs(), context.project())
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not f.hasGeometry():
if not discard_nomatch:
# ensure consistent count of attributes - otherwise non matching
# features will have incorrect attribute length
# and provider may reject them
attrs = f.attributes()
if len(attrs) < len(out_fields):
attrs += [NULL] * (len(out_fields) - len(attrs))
f.setAttributes(attrs)
sink.addFeature(f, QgsFeatureSink.FastInsert)
continue
bbox = bbox_transform.transformBoundingBox(f.geometry().boundingBox())
engine = None
values = []
request = QgsFeatureRequest().setFilterRect(bbox).setSubsetOfAttributes(join_field_indexes).setDestinationCrs(source.sourceCrs(), context.transformContext())
for test_feat in join_source.getFeatures(request):
if feedback.isCanceled():
break
join_attributes = []
for a in join_field_indexes:
join_attributes.append(test_feat.attributes()[a])
if engine is None:
engine = QgsGeometry.createGeometryEngine(f.geometry().constGet())
engine.prepareGeometry()
for predicate in predicates:
if getattr(engine, predicate)(test_feat.geometry().constGet()):
values.append(join_attributes)
break
feedback.setProgress(int(current * total))
if len(values) == 0:
if discard_nomatch:
continue
else:
# ensure consistent count of attributes - otherwise non matching
# features will have incorrect attribute length
# and provider may reject them
attrs = f.attributes()
if len(attrs) < len(out_fields):
attrs += [NULL] * (len(out_fields) - len(attrs))
f.setAttributes(attrs)
sink.addFeature(f, QgsFeatureSink.FastInsert)
else:
attrs = f.attributes()
for i in range(len(join_field_indexes)):
attribute_values = [v[i] for v in values]
field_type = field_types[i]
if field_type == 'numeric':
stat = QgsStatisticalSummary()
for v in attribute_values:
stat.addVariant(v)
stat.finalize()
for s in numeric_fields:
if s[0] in summaries:
attrs.append(getattr(stat, s[2])())
elif field_type == 'datetime':
stat = QgsDateTimeStatisticalSummary()
stat.calculate(attribute_values)
for s in datetime_fields:
if s[0] in summaries:
if s[0] == 'filled':
attrs.append(stat.count() - stat.countMissing())
elif s[0] == 'min':
attrs.append(stat.statistic(QgsDateTimeStatisticalSummary.Min))
elif s[0] == 'max':
attrs.append(stat.statistic(QgsDateTimeStatisticalSummary.Max))
else:
attrs.append(getattr(stat, s[2])())
else:
stat = QgsStringStatisticalSummary()
for v in attribute_values:
if v == NULL:
stat.addString('')
else:
stat.addString(str(v))
stat.finalize()
for s in string_fields:
if s[0] in summaries:
if s[0] == 'filled':
attrs.append(stat.count() - stat.countMissing())
else:
attrs.append(getattr(stat, s[2])())
f.setAttributes(attrs)
sink.addFeature(f, QgsFeatureSink.FastInsert)
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT_VECTOR, context)
raster_layer = self.parameterAsRasterLayer(parameters,
self.INPUT_RASTER, context)
rasterPath = exportRasterLayer(raster_layer)
rasterDS = gdal.Open(rasterPath, gdal.GA_ReadOnly)
geoTransform = rasterDS.GetGeoTransform()
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
fields.append(QgsField('poly_id', QVariant.Int, '', 10, 0))
fields.append(QgsField('point_id', QVariant.Int, '', 10, 0))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT,
context, fields,
QgsWkbTypes.Point,
raster_layer.crs())
outFeature = QgsFeature()
outFeature.setFields(fields)
fid = 0
polyId = 0
pointId = 0
features = source.getFeatures(QgsFeatureRequest().setDestinationCrs(
raster_layer.crs()))
total = 100.0 / source.featureCount() if source.featureCount() else 0
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not f.hasGeometry():
continue
geom = f.geometry()
bbox = geom.boundingBox()
xMin = bbox.xMinimum()
xMax = bbox.xMaximum()
yMin = bbox.yMinimum()
yMax = bbox.yMaximum()
(startRow,
startColumn) = raster.mapToPixel(xMin, yMax, geoTransform)
(endRow, endColumn) = raster.mapToPixel(xMax, yMin, geoTransform)
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
for row in range(startRow, endRow + 1):
for col in range(startColumn, endColumn + 1):
if feedback.isCanceled():
break
(x, y) = raster.pixelToMap(row, col, geoTransform)
point = QgsPoint(x, y)
if engine.contains(point):
outFeature.setGeometry(QgsGeometry(point))
outFeature['id'] = fid
outFeature['poly_id'] = polyId
outFeature['point_id'] = pointId
fid += 1
pointId += 1
sink.addFeature(outFeature, QgsFeatureSink.FastInsert)
pointId = 0
polyId += 1
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}
def processAlgorithm(self, progress):
layerA = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT_A))
splitLayer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT_B))
sameLayer = self.getParameterValue(self.INPUT_A) == self.getParameterValue(self.INPUT_B)
fieldList = layerA.fields()
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fieldList,
QgsWkbTypes.multiType(layerA.wkbType()), layerA.crs())
spatialIndex = QgsSpatialIndex()
splitGeoms = {}
request = QgsFeatureRequest()
request.setSubsetOfAttributes([])
for aSplitFeature in vector.features(splitLayer, request):
splitGeoms[aSplitFeature.id()] = aSplitFeature.geometry()
spatialIndex.insertFeature(aSplitFeature)
# honor the case that user has selection on split layer and has setting "use selection"
outFeat = QgsFeature()
features = vector.features(layerA)
if len(features) == 0:
total = 100
else:
total = 100.0 / float(len(features))
for current, inFeatA in enumerate(features):
inGeom = inFeatA.geometry()
attrsA = inFeatA.attributes()
outFeat.setAttributes(attrsA)
if inGeom.isMultipart():
inGeoms = []
for g in inGeom.asGeometryCollection():
inGeoms.append(g)
else:
inGeoms = [inGeom]
lines = spatialIndex.intersects(inGeom.boundingBox())
if len(lines) > 0: # has intersection of bounding boxes
splittingLines = []
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
engine.prepareGeometry()
for i in lines:
try:
splitGeom = splitGeoms[i]
except:
continue
# check if trying to self-intersect
if sameLayer:
if inFeatA.id() == i:
continue
if engine.intersects(splitGeom.geometry()):
splittingLines.append(splitGeom)
if len(splittingLines) > 0:
for splitGeom in splittingLines:
splitterPList = None
outGeoms = []
split_geom_engine = QgsGeometry.createGeometryEngine(splitGeom.geometry())
split_geom_engine.prepareGeometry()
while len(inGeoms) > 0:
inGeom = inGeoms.pop()
if inGeom.isEmpty(): # this has been encountered and created a run-time error
continue
if split_geom_engine.intersects(inGeom.geometry()):
inPoints = vector.extractPoints(inGeom)
if splitterPList == None:
splitterPList = vector.extractPoints(splitGeom)
try:
result, newGeometries, topoTestPoints = inGeom.splitGeometry(splitterPList, False)
except:
ProcessingLog.addToLog(ProcessingLog.LOG_WARNING,
self.tr('Geometry exception while splitting'))
result = 1
# splitGeometry: If there are several intersections
# between geometry and splitLine, only the first one is considered.
if result == 0: # split occurred
if inPoints == vector.extractPoints(inGeom):
# bug in splitGeometry: sometimes it returns 0 but
# the geometry is unchanged
outGeoms.append(inGeom)
else:
inGeoms.append(inGeom)
for aNewGeom in newGeometries:
inGeoms.append(aNewGeom)
else:
outGeoms.append(inGeom)
else:
outGeoms.append(inGeom)
inGeoms = outGeoms
parts = []
for aGeom in inGeoms:
passed = True
if QgsWkbTypes.geometryType( aGeom.wkbType() ) == QgsWkbTypes.LineGeometry:
numPoints = aGeom.geometry().numPoints()
if numPoints <= 2:
if numPoints == 2:
passed = not aGeom.geometry().isClosed() # tests if vertex 0 = vertex 1
else:
passed = False
# sometimes splitting results in lines of zero length
if passed:
parts.append(aGeom)
if len(parts) > 0:
outFeat.setGeometry(QgsGeometry.collectGeometry(parts))
writer.addFeature(outFeat)
progress.setPercentage(int(current * total))
del writer
def processAlgorithm(self, progress):
layerA = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT_A))
layerB = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT_B))
sameLayer = self.getParameterValue(self.INPUT_A) == self.getParameterValue(self.INPUT_B)
fieldList = layerA.fields()
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fieldList,
QgsWkbTypes.LineString, layerA.crs())
spatialIndex = vector.spatialindex(layerB)
outFeat = QgsFeature()
features = vector.features(layerA)
total = 100.0 / float(len(features))
for current, inFeatA in enumerate(features):
inGeom = inFeatA.geometry()
attrsA = inFeatA.attributes()
outFeat.setAttributes(attrsA)
inLines = [inGeom]
lines = spatialIndex.intersects(inGeom.boundingBox())
engine = None
if len(lines) > 0:
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
engine.prepareGeometry()
if len(lines) > 0: # hasIntersections
splittingLines = []
request = QgsFeatureRequest().setFilterFids(lines).setSubsetOfAttributes([])
for inFeatB in layerB.getFeatures(request):
# check if trying to self-intersect
if sameLayer:
if inFeatA.id() == inFeatB.id():
continue
splitGeom = inFeatB.geometry()
if engine.intersects(splitGeom.geometry()):
splittingLines.append(splitGeom)
if len(splittingLines) > 0:
for splitGeom in splittingLines:
splitterPList = vector.extractPoints(splitGeom)
outLines = []
split_geom_engine = QgsGeometry.createGeometryEngine(splitGeom.geometry())
split_geom_engine.prepareGeometry()
while len(inLines) > 0:
inGeom = inLines.pop()
inPoints = vector.extractPoints(inGeom)
if split_geom_engine.intersects(inGeom.geometry()):
try:
result, newGeometries, topoTestPoints = inGeom.splitGeometry(splitterPList, False)
except:
ProcessingLog.addToLog(ProcessingLog.LOG_WARNING,
self.tr('Geometry exception while splitting'))
result = 1
# splitGeometry: If there are several intersections
# between geometry and splitLine, only the first one is considered.
if result == 0: # split occurred
if inPoints == vector.extractPoints(inGeom):
# bug in splitGeometry: sometimes it returns 0 but
# the geometry is unchanged
outLines.append(inGeom)
else:
inLines.append(inGeom)
for aNewGeom in newGeometries:
inLines.append(aNewGeom)
else:
outLines.append(inGeom)
else:
outLines.append(inGeom)
inLines = outLines
for aLine in inLines:
if len(aLine.asPolyline()) > 2 or \
(len(aLine.asPolyline()) == 2 and
aLine.asPolyline()[0] != aLine.asPolyline()[1]):
# sometimes splitting results in lines of zero length
outFeat.setGeometry(aLine)
writer.addFeature(outFeat)
progress.setPercentage(int(current * total))
del writer
def processAlgorithm(self, progress):
source_layer = dataobjects.getObjectFromUri(
self.getParameterValue(Clip.INPUT))
mask_layer = dataobjects.getObjectFromUri(
self.getParameterValue(Clip.OVERLAY))
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
source_layer.fields(),
QgsWkbTypes.multiType(source_layer.wkbType()),
source_layer.crs())
# first build up a list of clip geometries
clip_geoms = []
for maskFeat in vector.features(mask_layer, QgsFeatureRequest().setSubsetOfAttributes([])):
clip_geoms.append(maskFeat.geometry())
# are we clipping against a single feature? if so, we can show finer progress reports
if len(clip_geoms) > 1:
combined_clip_geom = QgsGeometry.unaryUnion(clip_geoms)
single_clip_feature = False
else:
combined_clip_geom = clip_geoms[0]
single_clip_feature = True
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(combined_clip_geom.geometry())
engine.prepareGeometry()
tested_feature_ids = set()
for i, clip_geom in enumerate(clip_geoms):
input_features = [f for f in vector.features(source_layer, QgsFeatureRequest().setFilterRect(clip_geom.boundingBox()))]
if not input_features:
continue
if single_clip_feature:
total = 100.0 / len(input_features)
else:
total = 0
for current, in_feat in enumerate(input_features):
if not in_feat.geometry():
continue
if in_feat.id() in tested_feature_ids:
# don't retest a feature we have already checked
continue
tested_feature_ids.add(in_feat.id())
if not engine.intersects(in_feat.geometry().geometry()):
continue
if not engine.contains(in_feat.geometry().geometry()):
cur_geom = in_feat.geometry()
new_geom = combined_clip_geom.intersection(cur_geom)
if new_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(new_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
int_com = in_feat.geometry().combine(new_geom)
int_sym = in_feat.geometry().symDifference(new_geom)
if not int_com or not int_sym:
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
self.tr('GEOS geoprocessing error: One or more '
'input features have invalid geometry.'))
else:
new_geom = int_com.difference(int_sym)
if new_geom.isGeosEmpty() or not new_geom.isGeosValid():
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
self.tr('GEOS geoprocessing error: One or more '
'input features have invalid geometry.'))
else:
# clip geometry totally contains feature geometry, so no need to perform intersection
new_geom = in_feat.geometry()
try:
out_feat = QgsFeature()
out_feat.setGeometry(new_geom)
out_feat.setAttributes(in_feat.attributes())
writer.addFeature(out_feat)
except:
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
self.tr('Feature geometry error: One or more '
'output features ignored due to '
'invalid geometry.'))
continue
if single_clip_feature:
progress.setPercentage(int(current * total))
if not single_clip_feature:
# coarse progress report for multiple clip geometries
progress.setPercentage(100.0 * i / len(clip_geoms))
del writer
def processAlgorithm(self, feedback):
polyLayer = dataobjects.getObjectFromUri(
self.getParameterValue(self.POLYGONS))
pointLayer = dataobjects.getObjectFromUri(
self.getParameterValue(self.POINTS))
fieldName = self.getParameterValue(self.FIELD)
fieldIdx = pointLayer.fields().lookupField(
self.getParameterValue(self.WEIGHT))
fields = polyLayer.fields()
fields.append(QgsField(fieldName, QVariant.Int))
(idxCount,
fieldList) = vector.findOrCreateField(polyLayer, polyLayer.fields(),
fieldName)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fields.toList(), polyLayer.wkbType(), polyLayer.crs())
spatialIndex = vector.spatialindex(pointLayer)
ftPoint = QgsFeature()
outFeat = QgsFeature()
geom = QgsGeometry()
features = vector.features(polyLayer)
total = 100.0 / len(features)
for current, ftPoly in enumerate(features):
geom = ftPoly.geometry()
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
attrs = ftPoly.attributes()
count = 0
points = spatialIndex.intersects(geom.boundingBox())
if len(points) > 0:
feedback.setProgressText(str(len(points)))
request = QgsFeatureRequest().setFilterFids(
points).setSubsetOfAttributes([fieldIdx])
fit = pointLayer.getFeatures(request)
ftPoint = QgsFeature()
while fit.nextFeature(ftPoint):
tmpGeom = QgsGeometry(ftPoint.geometry())
if engine.contains(tmpGeom.geometry()):
weight = str(ftPoint.attributes()[fieldIdx])
try:
count += float(weight)
except:
# Ignore fields with non-numeric values
pass
outFeat.setGeometry(geom)
if idxCount == len(attrs):
attrs.append(count)
else:
attrs[idxCount] = count
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
if source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
join_source = self.parameterAsSource(parameters, self.JOIN, context)
if join_source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.JOIN))
join_fields = self.parameterAsFields(parameters, self.JOIN_FIELDS, context)
method = self.parameterAsEnum(parameters, self.METHOD, context)
discard_nomatch = self.parameterAsBool(parameters, self.DISCARD_NONMATCHING, context)
prefix = self.parameterAsString(parameters, self.PREFIX, context)
source_fields = source.fields()
fields_to_join = QgsFields()
join_field_indexes = []
if not join_fields:
fields_to_join = join_source.fields()
join_field_indexes = [i for i in range(len(fields_to_join))]
else:
for f in join_fields:
idx = join_source.fields().lookupField(f)
join_field_indexes.append(idx)
if idx >= 0:
fields_to_join.append(join_source.fields().at(idx))
if prefix:
prefixed_fields = QgsFields()
for i in range(len(fields_to_join)):
field = fields_to_join[i]
field.setName(prefix + field.name())
prefixed_fields.append(field)
fields_to_join = prefixed_fields
out_fields = QgsProcessingUtils.combineFields(source_fields, fields_to_join)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
out_fields, source.wkbType(), source.sourceCrs())
if sink is None:
raise QgsProcessingException(self.invalidSinkError(parameters, self.OUTPUT))
# do the join
# build a list of 'reversed' predicates, because in this function
# we actually test the reverse of what the user wants (allowing us
# to prepare geometries and optimise the algorithm)
predicates = [self.reversed_predicates[self.predicates[i][0]] for i in
self.parameterAsEnums(parameters, self.PREDICATE, context)]
remaining = set()
if not discard_nomatch:
remaining = set(source.allFeatureIds())
added_set = set()
request = QgsFeatureRequest().setSubsetOfAttributes(join_field_indexes).setDestinationCrs(source.sourceCrs(), context.transformContext())
features = join_source.getFeatures(request)
total = 100.0 / join_source.featureCount() if join_source.featureCount() else 0
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not f.hasGeometry():
continue
bbox = f.geometry().boundingBox()
engine = None
request = QgsFeatureRequest().setFilterRect(bbox)
for test_feat in source.getFeatures(request):
if feedback.isCanceled():
break
if method == 1 and test_feat.id() in added_set:
# already added this feature, and user has opted to only output first match
continue
join_attributes = []
for a in join_field_indexes:
join_attributes.append(f.attributes()[a])
if engine is None:
engine = QgsGeometry.createGeometryEngine(f.geometry().constGet())
engine.prepareGeometry()
for predicate in predicates:
if getattr(engine, predicate)(test_feat.geometry().constGet()):
added_set.add(test_feat.id())
# join attributes and add
attributes = test_feat.attributes()
attributes.extend(join_attributes)
output_feature = test_feat
output_feature.setAttributes(attributes)
sink.addFeature(output_feature, QgsFeatureSink.FastInsert)
break
feedback.setProgress(int(current * total))
if not discard_nomatch:
remaining = remaining.difference(added_set)
for f in source.getFeatures(QgsFeatureRequest().setFilterFids(list(remaining))):
if feedback.isCanceled():
break
sink.addFeature(f, QgsFeatureSink.FastInsert)
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
poly_source = self.parameterAsSource(parameters, self.POLYGONS, context)
if poly_source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.POLYGONS))
point_source = self.parameterAsSource(parameters, self.POINTS, context)
if point_source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.POINTS))
weight_field = self.parameterAsString(parameters, self.WEIGHT, context)
weight_field_index = -1
if weight_field:
weight_field_index = point_source.fields().lookupField(weight_field)
class_field = self.parameterAsString(parameters, self.CLASSFIELD, context)
class_field_index = -1
if class_field:
class_field_index = point_source.fields().lookupField(class_field)
field_name = self.parameterAsString(parameters, self.FIELD, context)
fields = poly_source.fields()
if fields.lookupField(field_name) < 0:
fields.append(QgsField(field_name, QVariant.LongLong))
field_index = fields.lookupField(field_name)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, poly_source.wkbType(), poly_source.sourceCrs(), QgsFeatureSink.RegeneratePrimaryKey)
if sink is None:
raise QgsProcessingException(self.invalidSinkError(parameters, self.OUTPUT))
point_attribute_indices = []
if weight_field_index >= 0:
point_attribute_indices.append(weight_field_index)
if class_field_index >= 0:
point_attribute_indices.append(class_field_index)
features = poly_source.getFeatures()
total = 100.0 / poly_source.featureCount() if poly_source.featureCount() else 0
for current, polygon_feature in enumerate(features):
if feedback.isCanceled():
break
count = 0
output_feature = QgsFeature()
if polygon_feature.hasGeometry():
geom = polygon_feature.geometry()
engine = QgsGeometry.createGeometryEngine(geom.constGet())
engine.prepareGeometry()
count = 0
classes = set()
request = QgsFeatureRequest().setFilterRect(geom.boundingBox()).setDestinationCrs(poly_source.sourceCrs(), context.transformContext())
request.setSubsetOfAttributes(point_attribute_indices)
for point_feature in point_source.getFeatures(request):
if feedback.isCanceled():
break
if engine.contains(point_feature.geometry().constGet()):
if weight_field_index >= 0:
weight = point_feature[weight_field_index]
try:
count += float(weight)
except:
# Ignore fields with non-numeric values
pass
elif class_field_index >= 0:
point_class = point_feature[class_field_index]
if point_class not in classes:
classes.add(point_class)
else:
count += 1
output_feature.setGeometry(geom)
attrs = polygon_feature.attributes()
if class_field_index >= 0:
score = len(classes)
else:
score = count
if field_index == len(attrs):
attrs.append(score)
else:
attrs[field_index] = score
output_feature.setAttributes(attrs)
sink.addFeature(output_feature, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}
def processAlgorithm(self, progress):
layer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT_VECTOR))
rasterPath = str(self.getParameterValue(self.INPUT_RASTER))
rasterDS = gdal.Open(rasterPath, gdal.GA_ReadOnly)
geoTransform = rasterDS.GetGeoTransform()
rasterDS = None
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
fields.append(QgsField('poly_id', QVariant.Int, '', 10, 0))
fields.append(QgsField('point_id', QVariant.Int, '', 10, 0))
writer = self.getOutputFromName(self.OUTPUT_LAYER).getVectorWriter(
fields.toList(), QgsWkbTypes.Point, layer.crs())
outFeature = QgsFeature()
outFeature.setFields(fields)
fid = 0
polyId = 0
pointId = 0
features = vector.features(layer)
total = 100.0 / len(features)
for current, f in enumerate(features):
geom = f.geometry()
bbox = geom.boundingBox()
xMin = bbox.xMinimum()
xMax = bbox.xMaximum()
yMin = bbox.yMinimum()
yMax = bbox.yMaximum()
(startRow, startColumn) = raster.mapToPixel(xMin, yMax, geoTransform)
(endRow, endColumn) = raster.mapToPixel(xMax, yMin, geoTransform)
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
for row in range(startRow, endRow + 1):
for col in range(startColumn, endColumn + 1):
(x, y) = raster.pixelToMap(row, col, geoTransform)
point = QgsPointV2()
point.setX(x)
point.setY(y)
if engine.contains(point):
outFeature.setGeometry(QgsGeometry(point))
outFeature['id'] = fid
outFeature['poly_id'] = polyId
outFeature['point_id'] = pointId
fid += 1
pointId += 1
writer.addFeature(outFeature)
pointId = 0
polyId += 1
progress.setPercentage(int(current * total))
del writer
def processAlgorithm(self, feedback):
inLayer = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT))
boundary = self.getParameterValue(self.MODE) == self.MODE_BOUNDARY
smallestArea = self.getParameterValue(
self.MODE) == self.MODE_SMALLEST_AREA
if inLayer.selectedFeatureCount() == 0:
ProcessingLog.addToLog(
ProcessingLog.LOG_WARNING,
self.tr('%s: (No selection in input layer "%s")' %
(self.commandLineName(),
self.getParameterValue(self.INPUT))))
featToEliminate = []
selFeatIds = inLayer.selectedFeatureIds()
output = self.getOutputFromName(self.OUTPUT)
writer = output.getVectorWriter(inLayer.fields(), inLayer.wkbType(),
inLayer.crs())
for aFeat in inLayer.getFeatures():
if aFeat.id() in selFeatIds:
# Keep references to the features to eliminate
featToEliminate.append(aFeat)
else:
# write the others to output
writer.addFeature(aFeat)
# Delete all features to eliminate in processLayer
processLayer = output.layer
processLayer.startEditing()
# ANALYZE
if len(featToEliminate) > 0: # Prevent zero division
start = 20.00
add = 80.00 / len(featToEliminate)
else:
start = 100
feedback.setProgress(start)
madeProgress = True
# We go through the list and see if we find any polygons we can
# merge the selected with. If we have no success with some we
# merge and then restart the whole story.
while madeProgress: # Check if we made any progress
madeProgress = False
featNotEliminated = []
# Iterate over the polygons to eliminate
for i in range(len(featToEliminate)):
feat = featToEliminate.pop()
geom2Eliminate = feat.geometry()
bbox = geom2Eliminate.boundingBox()
fit = processLayer.getFeatures(
QgsFeatureRequest().setFilterRect(
bbox).setSubsetOfAttributes([]))
mergeWithFid = None
mergeWithGeom = None
max = 0
min = -1
selFeat = QgsFeature()
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(
geom2Eliminate.geometry())
engine.prepareGeometry()
while fit.nextFeature(selFeat):
selGeom = selFeat.geometry()
if engine.intersects(selGeom.geometry()):
# We have a candidate
iGeom = geom2Eliminate.intersection(selGeom)
if not iGeom:
continue
if boundary:
selValue = iGeom.length()
else:
# area. We need a common boundary in
# order to merge
if 0 < iGeom.length():
selValue = selGeom.area()
else:
selValue = -1
if -1 != selValue:
useThis = True
if smallestArea:
if -1 == min:
min = selValue
else:
if selValue < min:
min = selValue
else:
useThis = False
else:
if selValue > max:
max = selValue
else:
useThis = False
if useThis:
mergeWithFid = selFeat.id()
mergeWithGeom = QgsGeometry(selGeom)
# End while fit
if mergeWithFid is not None:
# A successful candidate
newGeom = mergeWithGeom.combine(geom2Eliminate)
if processLayer.changeGeometry(mergeWithFid, newGeom):
madeProgress = True
else:
raise GeoAlgorithmExecutionException(
self.
tr('Could not replace geometry of feature with id %s'
% mergeWithFid))
start = start + add
feedback.setProgress(start)
else:
featNotEliminated.append(feat)
# End for featToEliminate
featToEliminate = featNotEliminated
# End while
if not processLayer.commitChanges():
raise GeoAlgorithmExecutionException(
self.tr('Could not commit changes'))
for feature in featNotEliminated:
writer.addFeature(feature)
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
if source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
strategy = self.parameterAsEnum(parameters, self.STRATEGY, context)
minDistance = self.parameterAsDouble(parameters, self.MIN_DISTANCE, context)
expression = QgsExpression(self.parameterAsString(parameters, self.EXPRESSION, context))
if expression.hasParserError():
raise QgsProcessingException(expression.parserErrorString())
expressionContext = self.createExpressionContext(parameters, context, source)
expression.prepare(expressionContext)
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, QgsWkbTypes.Point, source.sourceCrs(), QgsFeatureSink.RegeneratePrimaryKey)
if sink is None:
raise QgsProcessingException(self.invalidSinkError(parameters, self.OUTPUT))
da = QgsDistanceArea()
da.setSourceCrs(source.sourceCrs(), context.transformContext())
da.setEllipsoid(context.project().ellipsoid())
total = 100.0 / source.featureCount() if source.featureCount() else 0
current_progress = 0
for current, f in enumerate(source.getFeatures()):
if feedback.isCanceled():
break
if not f.hasGeometry():
continue
current_progress = total * current
feedback.setProgress(current_progress)
expressionContext.setFeature(f)
value = expression.evaluate(expressionContext)
if expression.hasEvalError():
feedback.pushInfo(
self.tr('Evaluation error for feature ID {}: {}').format(f.id(), expression.evalErrorString()))
continue
fGeom = f.geometry()
engine = QgsGeometry.createGeometryEngine(fGeom.constGet())
engine.prepareGeometry()
bbox = fGeom.boundingBox()
if strategy == 0:
pointCount = int(value)
else:
pointCount = int(round(value * da.measureArea(fGeom)))
if pointCount == 0:
feedback.pushInfo("Skip feature {} as number of points for it is 0.".format(f.id()))
continue
index = QgsSpatialIndex()
points = dict()
nPoints = 0
nIterations = 0
maxIterations = pointCount * 200
feature_total = total / pointCount if pointCount else 1
random.seed()
while nIterations < maxIterations and nPoints < pointCount:
if feedback.isCanceled():
break
rx = bbox.xMinimum() + bbox.width() * random.random()
ry = bbox.yMinimum() + bbox.height() * random.random()
p = QgsPointXY(rx, ry)
geom = QgsGeometry.fromPointXY(p)
if engine.contains(geom.constGet()) and \
vector.checkMinDistance(p, index, minDistance, points):
f = QgsFeature(nPoints)
f.initAttributes(1)
f.setFields(fields)
f.setAttribute('id', nPoints)
f.setGeometry(geom)
sink.addFeature(f, QgsFeatureSink.FastInsert)
index.addFeature(f)
points[nPoints] = p
nPoints += 1
feedback.setProgress(current_progress + int(nPoints * feature_total))
nIterations += 1
if nPoints < pointCount:
feedback.pushInfo(self.tr('Could not generate requested number of random '
'points. Maximum number of attempts exceeded.'))
feedback.setProgress(100)
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
poly_source = self.parameterAsSource(parameters, self.POLYGONS,
context)
if poly_source is None:
raise QgsProcessingException(
self.invalidSourceError(parameters, self.POLYGONS))
point_source = self.parameterAsSource(parameters, self.POINTS, context)
if point_source is None:
raise QgsProcessingException(
self.invalidSourceError(parameters, self.POINTS))
weight_field = self.parameterAsString(parameters, self.WEIGHT, context)
weight_field_index = -1
if weight_field:
weight_field_index = point_source.fields().lookupField(
weight_field)
class_field = self.parameterAsString(parameters, self.CLASSFIELD,
context)
class_field_index = -1
if class_field:
class_field_index = point_source.fields().lookupField(class_field)
field_name = self.parameterAsString(parameters, self.FIELD, context)
fields = poly_source.fields()
if fields.lookupField(field_name) < 0:
fields.append(QgsField(field_name, QVariant.Int))
field_index = fields.lookupField(field_name)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT,
context, fields,
poly_source.wkbType(),
poly_source.sourceCrs())
if sink is None:
raise QgsProcessingException(
self.invalidSinkError(parameters, self.OUTPUT))
spatialIndex = QgsSpatialIndex(
point_source.getFeatures(QgsFeatureRequest().setSubsetOfAttributes(
[]).setDestinationCrs(poly_source.sourceCrs(),
context.transformContext())), feedback)
point_attribute_indices = []
if weight_field_index >= 0:
point_attribute_indices.append(weight_field_index)
if class_field_index >= 0:
point_attribute_indices.append(class_field_index)
features = poly_source.getFeatures()
total = 100.0 / poly_source.featureCount() if poly_source.featureCount(
) else 0
for current, polygon_feature in enumerate(features):
if feedback.isCanceled():
break
count = 0
output_feature = QgsFeature()
if polygon_feature.hasGeometry():
geom = polygon_feature.geometry()
engine = QgsGeometry.createGeometryEngine(geom.constGet())
engine.prepareGeometry()
count = 0
classes = set()
points = spatialIndex.intersects(geom.boundingBox())
if len(points) > 0:
request = QgsFeatureRequest().setFilterFids(
points).setDestinationCrs(poly_source.sourceCrs(),
context.transformContext())
request.setSubsetOfAttributes(point_attribute_indices)
for point_feature in point_source.getFeatures(request):
if feedback.isCanceled():
break
if engine.contains(
point_feature.geometry().constGet()):
if weight_field_index >= 0:
weight = point_feature.attributes(
)[weight_field_index]
try:
count += float(weight)
except:
# Ignore fields with non-numeric values
pass
elif class_field_index >= 0:
point_class = point_feature.attributes(
)[class_field_index]
if point_class not in classes:
classes.add(point_class)
else:
count += 1
output_feature.setGeometry(geom)
attrs = polygon_feature.attributes()
if class_field_index >= 0:
score = len(classes)
else:
score = count
if field_index == len(attrs):
attrs.append(score)
else:
attrs[field_index] = score
output_feature.setAttributes(attrs)
sink.addFeature(output_feature, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT_VECTOR, context)
if source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT_VECTOR))
raster_layer = self.parameterAsRasterLayer(parameters, self.INPUT_RASTER, context)
rasterPath = raster_layer.source()
rasterDS = gdal.Open(rasterPath, gdal.GA_ReadOnly)
geoTransform = rasterDS.GetGeoTransform()
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
fields.append(QgsField('poly_id', QVariant.Int, '', 10, 0))
fields.append(QgsField('point_id', QVariant.Int, '', 10, 0))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, QgsWkbTypes.Point, raster_layer.crs())
if sink is None:
raise QgsProcessingException(self.invalidSinkError(parameters, self.OUTPUT))
outFeature = QgsFeature()
outFeature.setFields(fields)
fid = 0
polyId = 0
pointId = 0
features = source.getFeatures(QgsFeatureRequest().setDestinationCrs(raster_layer.crs(), context.transformContext()))
total = 100.0 / source.featureCount() if source.featureCount() else 0
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not f.hasGeometry():
continue
geom = f.geometry()
bbox = geom.boundingBox()
xMin = bbox.xMinimum()
xMax = bbox.xMaximum()
yMin = bbox.yMinimum()
yMax = bbox.yMaximum()
(startRow, startColumn) = raster.mapToPixel(xMin, yMax, geoTransform)
(endRow, endColumn) = raster.mapToPixel(xMax, yMin, geoTransform)
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(geom.constGet())
engine.prepareGeometry()
for row in range(startRow, endRow + 1):
for col in range(startColumn, endColumn + 1):
if feedback.isCanceled():
break
(x, y) = raster.pixelToMap(row, col, geoTransform)
point = QgsPoint(x, y)
if engine.contains(point):
outFeature.setGeometry(QgsGeometry(point))
outFeature['id'] = fid
outFeature['poly_id'] = polyId
outFeature['point_id'] = pointId
fid += 1
pointId += 1
sink.addFeature(outFeature, QgsFeatureSink.FastInsert)
pointId = 0
polyId += 1
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
if source is None:
raise QgsProcessingException(
self.invalidSourceError(parameters, self.INPUT))
strategy = self.parameterAsEnum(parameters, self.STRATEGY, context)
minDistance = self.parameterAsDouble(parameters, self.MIN_DISTANCE,
context)
expression = QgsExpression(
self.parameterAsString(parameters, self.EXPRESSION, context))
if expression.hasParserError():
raise QgsProcessingException(expression.parserErrorString())
expressionContext = self.createExpressionContext(
parameters, context, source)
expression.prepare(expressionContext)
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT,
context, fields,
QgsWkbTypes.Point,
source.sourceCrs())
if sink is None:
raise QgsProcessingException(
self.invalidSinkError(parameters, self.OUTPUT))
da = QgsDistanceArea()
da.setSourceCrs(source.sourceCrs(), context.transformContext())
da.setEllipsoid(context.project().ellipsoid())
total = 100.0 / source.featureCount() if source.featureCount() else 0
current_progress = 0
for current, f in enumerate(source.getFeatures()):
if feedback.isCanceled():
break
if not f.hasGeometry():
continue
current_progress = total * current
feedback.setProgress(current_progress)
expressionContext.setFeature(f)
value = expression.evaluate(expressionContext)
if expression.hasEvalError():
feedback.pushInfo(
self.tr('Evaluation error for feature ID {}: {}').format(
f.id(), expression.evalErrorString()))
continue
fGeom = f.geometry()
engine = QgsGeometry.createGeometryEngine(fGeom.constGet())
engine.prepareGeometry()
bbox = fGeom.boundingBox()
if strategy == 0:
pointCount = int(value)
else:
pointCount = int(round(value * da.measureArea(fGeom)))
if pointCount == 0:
feedback.pushInfo(
"Skip feature {} as number of points for it is 0.".format(
f.id()))
continue
index = QgsSpatialIndex()
points = dict()
nPoints = 0
nIterations = 0
maxIterations = pointCount * 200
feature_total = total / pointCount if pointCount else 1
random.seed()
while nIterations < maxIterations and nPoints < pointCount:
if feedback.isCanceled():
break
rx = bbox.xMinimum() + bbox.width() * random.random()
ry = bbox.yMinimum() + bbox.height() * random.random()
p = QgsPointXY(rx, ry)
geom = QgsGeometry.fromPointXY(p)
if engine.contains(geom.constGet()) and \
vector.checkMinDistance(p, index, minDistance, points):
f = QgsFeature(nPoints)
f.initAttributes(1)
f.setFields(fields)
f.setAttribute('id', nPoints)
f.setGeometry(geom)
sink.addFeature(f, QgsFeatureSink.FastInsert)
index.insertFeature(f)
points[nPoints] = p
nPoints += 1
feedback.setProgress(current_progress +
int(nPoints * feature_total))
nIterations += 1
if nPoints < pointCount:
feedback.pushInfo(
self.tr('Could not generate requested number of random '
'points. Maximum number of attempts exceeded.'))
feedback.setProgress(100)
return {self.OUTPUT: dest_id}
def processAlgorithm(self, parameters, context, feedback):
sourceA = self.parameterAsSource(parameters, self.INPUT, context)
sourceB = self.parameterAsSource(parameters, self.OVERLAY, context)
geomType = QgsWkbTypes.multiType(sourceA.wkbType())
fields = vector.combineFields(sourceA.fields(), sourceB.fields())
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, geomType, sourceA.sourceCrs())
featA = QgsFeature()
featB = QgsFeature()
outFeat = QgsFeature()
indexA = QgsSpatialIndex(sourceA, feedback)
indexB = QgsSpatialIndex(sourceB.getFeatures(QgsFeatureRequest().setSubsetOfAttributes([]).setDestinationCrs(sourceA.sourceCrs())), feedback)
total = 100.0 / (sourceA.featureCount() * sourceB.featureCount()) if sourceA.featureCount() and sourceB.featureCount() else 1
count = 0
for featA in sourceA.getFeatures():
if feedback.isCanceled():
break
lstIntersectingB = []
geom = featA.geometry()
atMapA = featA.attributes()
intersects = indexB.intersects(geom.boundingBox())
if len(intersects) < 1:
try:
outFeat.setGeometry(geom)
outFeat.setAttributes(atMapA)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
# This really shouldn't happen, as we haven't
# edited the input geom at all
feedback.pushInfo(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
else:
request = QgsFeatureRequest().setFilterFids(intersects).setSubsetOfAttributes([])
request.setDestinationCrs(sourceA.sourceCrs())
engine = QgsGeometry.createGeometryEngine(geom.geometry())
engine.prepareGeometry()
for featB in sourceB.getFeatures(request):
atMapB = featB.attributes()
tmpGeom = featB.geometry()
if engine.intersects(tmpGeom.geometry()):
int_geom = geom.intersection(tmpGeom)
lstIntersectingB.append(tmpGeom)
if not int_geom:
# There was a problem creating the intersection
feedback.pushInfo(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
int_geom = QgsGeometry()
else:
int_geom = QgsGeometry(int_geom)
if int_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(int_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
# Intersection produced different geomety types
temp_list = int_geom.asGeometryCollection()
for i in temp_list:
if i.type() == geom.type():
int_geom = QgsGeometry(i)
try:
outFeat.setGeometry(int_geom)
outFeat.setAttributes(atMapA + atMapB)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
else:
# Geometry list: prevents writing error
# in geometries of different types
# produced by the intersection
# fix #3549
if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]:
try:
outFeat.setGeometry(int_geom)
outFeat.setAttributes(atMapA + atMapB)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
# the remaining bit of featA's geometry
# if there is nothing left, this will just silently fail and we're good
diff_geom = QgsGeometry(geom)
if len(lstIntersectingB) != 0:
intB = QgsGeometry.unaryUnion(lstIntersectingB)
diff_geom = diff_geom.difference(intB)
if diff_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(diff_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
temp_list = diff_geom.asGeometryCollection()
for i in temp_list:
if i.type() == geom.type():
diff_geom = QgsGeometry(i)
try:
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMapA)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
count += 1
feedback.setProgress(int(count * total))
length = len(sourceA.fields())
atMapA = [None] * length
for featA in sourceB.getFeatures(QgsFeatureRequest().setDestinationCrs(sourceA.sourceCrs())):
if feedback.isCanceled():
break
add = False
geom = featA.geometry()
diff_geom = QgsGeometry(geom)
atMap = [None] * length
atMap.extend(featA.attributes())
intersects = indexA.intersects(geom.boundingBox())
if len(intersects) < 1:
try:
outFeat.setGeometry(geom)
outFeat.setAttributes(atMap)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
else:
request = QgsFeatureRequest().setFilterFids(intersects).setSubsetOfAttributes([])
request.setDestinationCrs(sourceA.sourceCrs())
# use prepared geometries for faster intersection tests
engine = QgsGeometry.createGeometryEngine(diff_geom.geometry())
engine.prepareGeometry()
for featB in sourceA.getFeatures(request):
atMapB = featB.attributes()
tmpGeom = featB.geometry()
if engine.intersects(tmpGeom.geometry()):
add = True
diff_geom = QgsGeometry(diff_geom.difference(tmpGeom))
else:
try:
# Ihis only happens if the bounding box
# intersects, but the geometry doesn't
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMap)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
if add:
try:
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(atMap)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
feedback.pushInfo(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
count += 1
feedback.setProgress(int(count * total))
return {self.OUTPUT: dest_id}
def clip(layer_to_clip, mask_layer, callback=None):
"""Clip a vector layer with another.
Issue https://github.com/inasafe/inasafe/issues/3186
Note : This algorithm is copied from :
https://github.com/qgis/QGIS/blob/master/python/plugins/processing/algs/
qgis/Clip.py
:param layer_to_clip: The vector layer to clip.
:type layer_to_clip: QgsVectorLayer
:param mask_layer: The vector layer to use for clipping.
:type mask_layer: QgsVectorLayer
:param callback: A function to all to indicate progress. The function
should accept params 'current' (int), 'maximum' (int) and 'step' (str).
Defaults to None.
:type callback: function
:return: The clip vector layer.
:rtype: QgsVectorLayer
.. versionadded:: 4.0
"""
output_layer_name = clip_steps['output_layer_name']
output_layer_name = output_layer_name % (
layer_to_clip.keywords['layer_purpose'])
processing_step = clip_steps['step_name']
writer = create_memory_layer(output_layer_name,
layer_to_clip.geometryType(),
layer_to_clip.crs(), layer_to_clip.fields())
writer.startEditing()
# Begin copy/paste from Processing plugin.
# Please follow their code as their code is optimized.
# The code below is not following our coding standards because we want to
# be able to track any diffs from QGIS easily.
# first build up a list of clip geometries
clip_geometries = []
request = QgsFeatureRequest().setSubsetOfAttributes([])
for mask_feature in mask_layer.getFeatures(request):
clip_geometries.append(QgsGeometry(mask_feature.geometry()))
# are we clipping against a single feature? if so,
# we can show finer progress reports
if len(clip_geometries) > 1:
# noinspection PyTypeChecker,PyCallByClass,PyArgumentList
combined_clip_geom = QgsGeometry.unaryUnion(clip_geometries)
single_clip_feature = False
else:
combined_clip_geom = clip_geometries[0]
single_clip_feature = True
# use prepared geometries for faster intersection tests
# noinspection PyArgumentList
engine = QgsGeometry.createGeometryEngine(combined_clip_geom.geometry())
engine.prepareGeometry()
tested_feature_ids = set()
for i, clip_geom in enumerate(clip_geometries):
request = QgsFeatureRequest().setFilterRect(clip_geom.boundingBox())
input_features = [f for f in layer_to_clip.getFeatures(request)]
if not input_features:
continue
if single_clip_feature:
total = 100.0 / len(input_features)
else:
total = 0
for current, in_feat in enumerate(input_features):
if not in_feat.geometry():
continue
if in_feat.id() in tested_feature_ids:
# don't retest a feature we have already checked
continue
tested_feature_ids.add(in_feat.id())
if not engine.intersects(in_feat.geometry().geometry()):
continue
if not engine.contains(in_feat.geometry().geometry()):
cur_geom = in_feat.geometry()
new_geom = combined_clip_geom.intersection(cur_geom)
if new_geom.wkbType() == QgsWKBTypes.Unknown \
or QgsWKBTypes.flatType(
new_geom.geometry().wkbType()) == \
QgsWKBTypes.GeometryCollection:
int_com = in_feat.geometry().combine(new_geom)
int_sym = in_feat.geometry().symDifference(new_geom)
if not int_com or not int_sym:
# LOGGER.debug(
# tr('GEOS geoprocessing error: One or more input '
# 'features have invalid geometry.'))
pass
else:
new_geom = int_com.difference(int_sym)
if new_geom.isGeosEmpty()\
or not new_geom.isGeosValid():
# LOGGER.debug(
# tr('GEOS geoprocessing error: One or more '
# 'input features have invalid geometry.'))
pass
else:
# clip geometry totally contains feature geometry,
# so no need to perform intersection
new_geom = in_feat.geometry()
try:
out_feat = QgsFeature()
out_feat.setGeometry(new_geom)
out_feat.setAttributes(in_feat.attributes())
if new_geom.type() == layer_to_clip.geometryType():
writer.addFeature(out_feat)
except:
LOGGER.debug(
tr('Feature geometry error: One or more output features '
'ignored due to invalid geometry.'))
continue
# TODO implement callback
if single_clip_feature:
# progress.setPercentage(int(current * total))
pass
if not single_clip_feature:
# coarse progress report for multiple clip geometries
# progress.setPercentage(100.0 * i / len(clip_geoms))
pass
# End copy/paste from Processing plugin.
writer.commitChanges()
writer.keywords = layer_to_clip.keywords.copy()
writer.keywords['title'] = output_layer_name
check_layer(writer)
return writer
