def processAlgorithm(self, parameters, context, feedback):
filename = self.getParameterValue(self.INPUT)
layer = QgsProcessingUtils.mapLayerFromString(filename, context)
filename = self.getParameterValue(self.INTERSECT)
selectLayer = QgsProcessingUtils.mapLayerFromString(filename, context)
predicates = self.getParameterValue(self.PREDICATE)
precision = self.getParameterValue(self.PRECISION)
index = QgsProcessingUtils.createSpatialIndex(layer, context)
output = self.getOutputFromName(self.OUTPUT)
writer = output.getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(), context)
if 'disjoint' in predicates:
disjoinSet = []
for feat in QgsProcessingUtils.getFeatures(layer, context):
disjoinSet.append(feat.id())
selectedSet = []
features = QgsProcessingUtils.getFeatures(selectLayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(selectLayer, context)
for current, f in enumerate(features):
geom = vector.snapToPrecision(f.geometry(), precision)
bbox = geom.boundingBox()
bbox.grow(0.51 * precision)
intersects = index.intersects(bbox)
request = QgsFeatureRequest().setFilterFids(intersects).setSubsetOfAttributes([])
for feat in layer.getFeatures(request):
tmpGeom = vector.snapToPrecision(feat.geometry(), precision)
res = False
for predicate in predicates:
if predicate == 'disjoint':
if tmpGeom.intersects(geom):
try:
disjoinSet.remove(feat.id())
except:
pass # already removed
else:
res = getattr(tmpGeom, predicate)(geom)
if res:
selectedSet.append(feat.id())
break
feedback.setProgress(int(current * total))
if 'disjoint' in predicates:
selectedSet = selectedSet + disjoinSet
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
if f.id() in selectedSet:
writer.addFeature(f)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
filename = self.getParameterValue(self.INPUT)
layer = QgsProcessingUtils.mapLayerFromString(filename, context)
field = self.getParameterValue(self.FIELD)
method = self.getParameterValue(self.METHOD)
index = layer.fields().lookupField(field)
features = QgsProcessingUtils.getFeatures(layer, context)
featureCount = QgsProcessingUtils.featureCount(layer, context)
unique = QgsProcessingUtils.uniqueValues(layer, index, context)
value = int(self.getParameterValue(self.NUMBER))
if method == 0:
if value > featureCount:
raise GeoAlgorithmExecutionException(
self.tr('Selected number is greater that feature count. '
'Choose lesser value and try again.'))
else:
if value > 100:
raise GeoAlgorithmExecutionException(
self.tr("Percentage can't be greater than 100. Set "
"correct value and try again."))
value = value / 100.0
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), layer.wkbType(),
layer.crs(), context)
selran = []
total = 100.0 / (featureCount * len(unique))
features = QgsProcessingUtils.getFeatures(layer, context)
classes = defaultdict(list)
for i, feature in enumerate(features):
attrs = feature.attributes()
classes[attrs[index]].append(feature)
feedback.setProgress(int(i * total))
for subset in classes.values():
selValue = value if method != 1 else int(round(value * len(subset), 0))
selran.extend(random.sample(subset, selValue))
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for (i, feat) in enumerate(selran):
writer.addFeature(feat)
feedback.setProgress(int(i * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
crsId = self.getParameterValue(self.TARGET_CRS)
targetCrs = QgsCoordinateReferenceSystem()
targetCrs.createFromUserInput(crsId)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), layer.wkbType(),
targetCrs, context)
layerCrs = layer.crs()
crsTransform = QgsCoordinateTransform(layerCrs, targetCrs)
outFeat = QgsFeature()
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
geom = f.geometry()
geom.transform(crsTransform)
outFeat.setGeometry(geom)
outFeat.setAttributes(f.attributes())
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
self.crs = targetCrs
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('line_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)
self.fid = 0
self.lineId = 0
self.pointId = 0
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
geom = f.geometry()
if geom.isMultipart():
lines = geom.asMultiPolyline()
for line in lines:
for i in range(len(line) - 1):
p1 = line[i]
p2 = line[i + 1]
(x1, y1) = raster.mapToPixel(p1.x(), p1.y(),
geoTransform)
(x2, y2) = raster.mapToPixel(p2.x(), p2.y(),
geoTransform)
self.buildLine(x1, y1, x2, y2, geoTransform,
writer, outFeature)
else:
points = geom.asPolyline()
for i in range(len(points) - 1):
p1 = points[i]
p2 = points[i + 1]
(x1, y1) = raster.mapToPixel(p1.x(), p1.y(), geoTransform)
(x2, y2) = raster.mapToPixel(p2.x(), p2.y(), geoTransform)
self.buildLine(x1, y1, x2, y2, geoTransform, writer,
outFeature)
self.pointId = 0
self.lineId += 1
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(layer.fields(), QgsWkbTypes.Polygon, layer.crs(), context)
distance = self.getParameterValue(self.DISTANCE)
segments = int(self.getParameterValue(self.SEGMENTS))
join_style = self.getParameterValue(self.JOIN_STYLE) + 1
if self.getParameterValue(self.SIDE) == 0:
side = QgsGeometry.SideLeft
else:
side = QgsGeometry.SideRight
miter_limit = self.getParameterValue(self.MITRE_LIMIT)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
output_feature = input_feature
input_geometry = input_feature.geometry()
if input_geometry:
output_geometry = input_geometry.singleSidedBuffer(distance, segments,
side, join_style, miter_limit)
if not output_geometry:
raise GeoAlgorithmExecutionException(
self.tr('Error calculating single sided buffer'))
output_feature.setGeometry(output_geometry)
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
fields = layer.fields()
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields, layer.wkbType(), layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
geoms = dict()
for current, f in enumerate(features):
geoms[f.id()] = f.geometry()
feedback.setProgress(int(current * total))
cleaned = dict(geoms)
for i, g in list(geoms.items()):
for j in list(cleaned.keys()):
if i == j or i not in cleaned:
continue
if g.isGeosEqual(cleaned[j]):
del cleaned[j]
total = 100.0 / len(cleaned)
request = QgsFeatureRequest().setFilterFids(list(cleaned.keys()))
for current, f in enumerate(layer.getFeatures(request)):
writer.addFeature(f)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
valuesFieldName = self.getParameterValue(self.VALUES_FIELD_NAME)
categoriesFieldName = self.getParameterValue(self.CATEGORIES_FIELD_NAME)
output = self.getOutputFromName(self.OUTPUT)
valuesField = layer.fields().lookupField(valuesFieldName)
categoriesField = layer.fields().lookupField(categoriesFieldName)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
values = {}
for current, feat in enumerate(features):
feedback.setProgress(int(current * total))
attrs = feat.attributes()
try:
value = float(attrs[valuesField])
cat = str(attrs[categoriesField])
if cat not in values:
values[cat] = []
values[cat].append(value)
except:
pass
fields = ['category', 'min', 'max', 'mean', 'stddev', 'sum', 'count']
writer = output.getTableWriter(fields)
stat = QgsStatisticalSummary(QgsStatisticalSummary.Min | QgsStatisticalSummary.Max |
QgsStatisticalSummary.Mean | QgsStatisticalSummary.StDevSample |
QgsStatisticalSummary.Sum | QgsStatisticalSummary.Count)
for (cat, v) in list(values.items()):
stat.calculate(v)
record = [cat, stat.min(), stat.max(), stat.mean(), stat.sampleStDev(), stat.sum(), stat.count()]
writer.addRecord(record)
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
max_iterations = self.getParameterValue(self.MAX_ITERATIONS)
angle_tolerance = self.getParameterValue(self.ANGLE_TOLERANCE)
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
output_feature = input_feature
input_geometry = input_feature.geometry()
if input_geometry:
output_geometry = input_geometry.orthogonalize(1.0e-8, max_iterations, angle_tolerance)
if not output_geometry:
raise GeoAlgorithmExecutionException(
self.tr('Error orthogonalizing geometry'))
output_feature.setGeometry(output_geometry)
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(layer.fields(), QgsWkbTypes.Point, layer.crs(), context)
outFeat = QgsFeature()
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, feat in enumerate(features):
inGeom = feat.geometry()
attrs = feat.attributes()
if inGeom.isNull():
outGeom = QgsGeometry(None)
else:
outGeom = QgsGeometry(inGeom.centroid())
if not outGeom:
raise GeoAlgorithmExecutionException(
self.tr('Error calculating centroid'))
outFeat.setGeometry(outGeom)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(), context)
start_distance = self.getParameterValue(self.START_DISTANCE)
end_distance = self.getParameterValue(self.END_DISTANCE)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
output_feature = input_feature
input_geometry = input_feature.geometry()
if input_geometry:
output_geometry = input_geometry.extendLine(start_distance, end_distance)
if not output_geometry:
raise GeoAlgorithmExecutionException(
self.tr('Error calculating extended line'))
output_feature.setGeometry(output_geometry)
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), QgsWkbTypes.Polygon,
layer.crs(), context)
outFeat = QgsFeature()
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
outGeomList = []
if f.geometry().isMultipart():
outGeomList = f.geometry().asMultiPolyline()
else:
outGeomList.append(f.geometry().asPolyline())
polyGeom = self.removeBadLines(outGeomList)
if len(polyGeom) != 0:
outFeat.setGeometry(QgsGeometry.fromPolygon(polyGeom))
attrs = f.attributes()
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, inFeat in enumerate(features):
outFeat = QgsFeature()
attrs = inFeat.attributes()
outFeat.setAttributes(attrs)
inGeom = inFeat.geometry()
if inGeom:
outGeom = inGeom.mergeLines()
if outGeom is None:
raise GeoAlgorithmExecutionException(
self.tr('Error merging lines'))
outFeat.setGeometry(outGeom)
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
fields = layer.fields()
fields.append(QgsField('node_pos', QVariant.Int))
fields.append(QgsField('node_index', QVariant.Int))
fields.append(QgsField('distance', QVariant.Double))
fields.append(QgsField('angle', QVariant.Double))
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(fields, QgsWkbTypes.Point, layer.crs(), context)
node_indices_string = self.getParameterValue(self.NODES)
indices = []
for node in node_indices_string.split(','):
try:
indices.append(int(node))
except:
raise GeoAlgorithmExecutionException(
self.tr('\'{}\' is not a valid node index').format(node))
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
input_geometry = f.geometry()
if not input_geometry:
writer.addFeature(f)
else:
total_nodes = input_geometry.geometry().nCoordinates()
for node in indices:
if node < 0:
node_index = total_nodes + node
else:
node_index = node
if node_index < 0 or node_index >= total_nodes:
continue
distance = input_geometry.distanceToVertex(node_index)
angle = math.degrees(input_geometry.angleAtVertex(node_index))
output_feature = QgsFeature()
attrs = f.attributes()
attrs.append(node)
attrs.append(node_index)
attrs.append(distance)
attrs.append(angle)
output_feature.setAttributes(attrs)
point = input_geometry.vertexAt(node_index)
output_feature.setGeometry(QgsGeometry.fromPoint(point))
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
fields = layer.fields()
fields.append(QgsField('node_index', QVariant.Int))
fields.append(QgsField('distance', QVariant.Double))
fields.append(QgsField('angle', QVariant.Double))
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields, QgsWkbTypes.Point, layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
input_geometry = f.geometry()
if not input_geometry:
writer.addFeature(f)
else:
points = vector.extractPoints(input_geometry)
for i, point in enumerate(points):
distance = input_geometry.distanceToVertex(i)
angle = math.degrees(input_geometry.angleAtVertex(i))
attrs = f.attributes()
attrs.append(i)
attrs.append(distance)
attrs.append(angle)
output_feature = QgsFeature()
output_feature.setAttributes(attrs)
output_feature.setGeometry(QgsGeometry.fromPoint(point))
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
fieldName = self.getParameterValue(self.FIELD)
idx = layer.fields().lookupField(fieldName)
fields = layer.fields()
fields[idx] = QgsField(fieldName, QVariant.Double, '', 24, 15)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields, layer.wkbType(), layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
value = f[idx]
try:
if '%' in value:
f[idx] = float(value.replace('%', '')) / 100.0
else:
f[idx] = float(value)
except:
f[idx] = None
writer.addFeature(f)
feedback.setProgress(int(current * total))
del writer
def layerOmmb(self, layer, context, writer, feedback):
req = QgsFeatureRequest().setSubsetOfAttributes([])
features = QgsProcessingUtils.getFeatures(layer, context, req)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
newgeometry = QgsGeometry()
first = True
for current, inFeat in enumerate(features):
if first:
newgeometry = inFeat.geometry()
first = False
else:
newgeometry = newgeometry.combine(inFeat.geometry())
feedback.setProgress(int(current * total))
geometry, area, angle, width, height = newgeometry.orientedMinimumBoundingBox()
if geometry:
outFeat = QgsFeature()
outFeat.setGeometry(geometry)
outFeat.setAttributes([area,
width * 2 + height * 2,
angle,
width,
height])
writer.addFeature(outFeat)
def processAlgorithm(self, parameters, context, feedback):
filename = self.getParameterValue(self.INPUT)
layer = QgsProcessingUtils.mapLayerFromString(filename, context)
method = self.getParameterValue(self.METHOD)
features = QgsProcessingUtils.getFeatures(layer, context)
featureCount = QgsProcessingUtils.featureCount(layer, context)
value = int(self.getParameterValue(self.NUMBER))
if method == 0:
if value > featureCount:
raise GeoAlgorithmExecutionException(
self.tr('Selected number is greater than feature count. '
'Choose a lower value and try again.'))
else:
if value > 100:
raise GeoAlgorithmExecutionException(
self.tr("Percentage can't be greater than 100. Set a "
"different value and try again."))
value = int(round(value / 100.0000, 4) * featureCount)
selran = random.sample(list(range(featureCount)), value)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), layer.wkbType(),
layer.crs(), context)
total = 100.0 / featureCount
for i, feat in enumerate(features):
if i in selran:
writer.addFeature(feat)
feedback.setProgress(int(i * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layerA = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(Difference.INPUT), context)
layerB = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(Difference.OVERLAY), context)
geomType = QgsWkbTypes.multiType(layerA.wkbType())
writer = self.getOutputFromName(
Difference.OUTPUT).getVectorWriter(layerA.fields(), geomType, layerA.crs(), context)
outFeat = QgsFeature()
index = QgsProcessingUtils.createSpatialIndex(layerB, context)
selectionA = QgsProcessingUtils.getFeatures(layerA, context)
total = 100.0 / QgsProcessingUtils.featureCount(layerA, context)
for current, inFeatA in enumerate(selectionA):
geom = inFeatA.geometry()
diff_geom = QgsGeometry(geom)
attrs = inFeatA.attributes()
intersections = index.intersects(geom.boundingBox())
request = QgsFeatureRequest().setFilterFids(intersections).setSubsetOfAttributes([])
for inFeatB in layerB.getFeatures(request):
tmpGeom = inFeatB.geometry()
if diff_geom.intersects(tmpGeom):
diff_geom = QgsGeometry(diff_geom.difference(tmpGeom))
try:
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
except:
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'), self.tr('Processing'), QgsMessageLog.WARNING)
continue
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(), context)
delta_x = self.getParameterValue(self.DELTA_X)
delta_y = self.getParameterValue(self.DELTA_Y)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
output_feature = input_feature
input_geometry = input_feature.geometry()
if input_geometry:
output_geometry = input_geometry
output_geometry.translate(delta_x, delta_y)
if not output_geometry:
raise GeoAlgorithmExecutionException(
self.tr('Error translating geometry'))
output_feature.setGeometry(output_geometry)
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
min_area = self.getParameterValue(self.MIN_AREA)
if min_area is not None:
try:
min_area = float(min_area)
except:
pass
if min_area == 0.0:
min_area = -1.0
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(),
context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
if f.hasGeometry():
if min_area is not None:
f.setGeometry(f.geometry().removeInteriorRings(min_area))
else:
f.setGeometry(f.geometry().removeInteriorRings())
writer.addFeature(f)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
reference_layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.REFERENCE_LAYER), context)
tolerance = self.getParameterValue(self.TOLERANCE)
mode = self.getParameterValue(self.BEHAVIOR)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(),
context)
features = QgsProcessingUtils.getFeatures(layer, context)
self.processed = 0
self.feedback = feedback
self.total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
if self.getParameterValue(self.INPUT) != self.getParameterValue(self.REFERENCE_LAYER):
snapper = QgsGeometrySnapper(reference_layer)
snapper.featureSnapped.connect(self.featureSnapped)
snapped_features = snapper.snapFeatures(features, tolerance, mode)
for f in snapped_features:
writer.addFeature(QgsFeature(f))
else:
# snapping internally
snapper = QgsInternalGeometrySnapper(tolerance, mode)
processed = 0
for f in features:
out_feature = f
out_feature.setGeometry(snapper.snapFeature(f))
writer.addFeature(out_feature)
processed += 1
feedback.setProgress(processed * self.total)
del writer
def processAlgorithm(self, parameters, context, feedback):
inLayer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
inField = self.getParameterValue(self.INPUT_FIELD)
targetLayer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.TARGET_LAYER), context)
targetField = self.getParameterValue(self.TARGET_FIELD)
matType = self.getParameterValue(self.MATRIX_TYPE)
nPoints = self.getParameterValue(self.NEAREST_POINTS)
outputFile = self.getOutputFromName(self.DISTANCE_MATRIX)
if nPoints < 1:
nPoints = QgsProcessingUtils.featureCount(targetLayer, context)
self.writer = outputFile.getTableWriter([])
if matType == 0:
# Linear distance matrix
self.linearMatrix(context, inLayer, inField, targetLayer, targetField,
matType, nPoints, feedback)
elif matType == 1:
# Standard distance matrix
self.regularMatrix(context, inLayer, inField, targetLayer, targetField,
nPoints, feedback)
elif matType == 2:
# Summary distance matrix
self.linearMatrix(context, inLayer, inField, targetLayer, targetField,
matType, nPoints, feedback)
def regularMatrix(self, context, inLayer, inField, targetLayer, targetField,
nPoints, feedback):
index = QgsProcessingUtils.createSpatialIndex(targetLayer, context)
inIdx = inLayer.fields().lookupField(inField)
distArea = QgsDistanceArea()
first = True
features = QgsProcessingUtils.getFeatures(inLayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(inLayer, context)
for current, inFeat in enumerate(features):
inGeom = inFeat.geometry()
inID = str(inFeat.attributes()[inIdx])
featList = index.nearestNeighbor(inGeom.asPoint(), nPoints)
if first:
first = False
data = ['ID']
for i in range(len(featList)):
data.append('DIST_{0}'.format(i + 1))
self.writer.addRecord(data)
data = [inID]
for i in featList:
request = QgsFeatureRequest().setFilterFid(i)
outFeat = next(targetLayer.getFeatures(request))
outGeom = outFeat.geometry()
dist = distArea.measureLine(inGeom.asPoint(),
outGeom.asPoint())
data.append(str(float(dist)))
self.writer.addRecord(data)
feedback.setProgress(int(current * total))
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
iterations = self.getParameterValue(self.ITERATIONS)
offset = self.getParameterValue(self.OFFSET)
max_angle = self.getParameterValue(self.MAX_ANGLE)
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
output_feature = input_feature
if input_feature.geometry():
output_geometry = input_feature.geometry().smooth(iterations, offset, -1, max_angle)
if not output_geometry:
raise GeoAlgorithmExecutionException(
self.tr('Error smoothing geometry'))
output_feature.setGeometry(output_geometry)
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
fieldname = self.getParameterValue(self.FIELD)
output = self.getOutputFromName(self.OUTPUT)
vlayer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
fieldindex = vlayer.fields().lookupField(fieldname)
fields = vlayer.fields()
fields.append(QgsField('NUM_FIELD', QVariant.Int))
writer = output.getVectorWriter(fields, vlayer.wkbType(), vlayer.crs(), context)
outFeat = QgsFeature()
classes = {}
features = QgsProcessingUtils.getFeatures(vlayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(vlayer, context)
for current, feature in enumerate(features):
feedback.setProgress(int(current * total))
inGeom = feature.geometry()
outFeat.setGeometry(inGeom)
atMap = feature.attributes()
clazz = atMap[fieldindex]
if clazz not in classes:
classes[clazz] = len(list(classes.keys()))
atMap.append(classes[clazz])
outFeat.setAttributes(atMap)
writer.addFeature(outFeat)
del writer
def processAlgorithm(self, parameters, context, feedback):
layerPoints = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.POINTS), context)
layerHubs = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.HUBS), context)
fieldName = self.getParameterValue(self.FIELD)
units = self.UNITS[self.getParameterValue(self.UNIT)]
if layerPoints.source() == layerHubs.source():
raise GeoAlgorithmExecutionException(
self.tr('Same layer given for both hubs and spokes'))
fields = layerPoints.fields()
fields.append(QgsField('HubName', QVariant.String))
fields.append(QgsField('HubDist', QVariant.Double))
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields, QgsWkbTypes.Point, layerPoints.crs(),
context)
index = QgsProcessingUtils.createSpatialIndex(layerHubs, context)
distance = QgsDistanceArea()
distance.setSourceCrs(layerPoints.crs())
distance.setEllipsoid(QgsProject.instance().ellipsoid())
# Scan source points, find nearest hub, and write to output file
features = QgsProcessingUtils.getFeatures(layerPoints, context)
total = 100.0 / QgsProcessingUtils.featureCount(layerPoints, context)
for current, f in enumerate(features):
src = f.geometry().boundingBox().center()
neighbors = index.nearestNeighbor(src, 1)
ft = next(layerHubs.getFeatures(QgsFeatureRequest().setFilterFid(neighbors[0]).setSubsetOfAttributes([fieldName], layerHubs.fields())))
closest = ft.geometry().boundingBox().center()
hubDist = distance.measureLine(src, closest)
attributes = f.attributes()
attributes.append(ft[fieldName])
if units == 'Feet':
attributes.append(hubDist * 3.2808399)
elif units == 'Miles':
attributes.append(hubDist * 0.000621371192)
elif units == 'Kilometers':
attributes.append(hubDist / 1000.0)
elif units != 'Meters':
attributes.append(sqrt(
pow(src.x() - closest.x(), 2.0) +
pow(src.y() - closest.y(), 2.0)))
else:
attributes.append(hubDist)
feat = QgsFeature()
feat.setAttributes(attributes)
feat.setGeometry(QgsGeometry.fromPoint(src))
writer.addFeature(feat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
source = self.getParameterValue(self.INPUT)
vlayer = QgsProcessingUtils.mapLayerFromString(source, context)
output = self.getOutputFromName(self.OUTPUT)
fields = vlayer.fields()
x_field_index = fields.lookupField(self.getParameterValue(self.XFIELD))
y_field_index = fields.lookupField(self.getParameterValue(self.YFIELD))
z_field_index = None
if self.getParameterValue(self.ZFIELD):
z_field_index = fields.lookupField(self.getParameterValue(self.ZFIELD))
m_field_index = None
if self.getParameterValue(self.MFIELD):
m_field_index = fields.lookupField(self.getParameterValue(self.MFIELD))
wkb_type = QgsWkbTypes.Point
if z_field_index is not None:
wkb_type = QgsWkbTypes.addZ(wkb_type)
if m_field_index is not None:
wkb_type = QgsWkbTypes.addM(wkb_type)
crsId = self.getParameterValue(self.TARGET_CRS)
target_crs = QgsCoordinateReferenceSystem()
target_crs.createFromUserInput(crsId)
writer = output.getVectorWriter(fields, wkb_type, target_crs, context)
features = QgsProcessingUtils.getFeatures(vlayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(vlayer, context)
for current, feature in enumerate(features):
feedback.setProgress(int(current * total))
attrs = feature.attributes()
try:
x = float(attrs[x_field_index])
y = float(attrs[y_field_index])
point = QgsPoint(x, y)
if z_field_index is not None:
try:
point.addZValue(float(attrs[z_field_index]))
except:
point.addZValue(0.0)
if m_field_index is not None:
try:
point.addMValue(float(attrs[m_field_index]))
except:
point.addMValue(0.0)
feature.setGeometry(QgsGeometry(point))
except:
pass # no geometry
writer.addFeature(feature)
del writer
def processAlgorithm(self, parameters, context, feedback):
filename = self.getParameterValue(self.INPUT)
inputLayer = QgsProcessingUtils.mapLayerFromString(filename, context)
method = self.getParameterValue(self.METHOD)
filename2 = self.getParameterValue(self.INTERSECT)
selectLayer = QgsProcessingUtils.mapLayerFromString(filename2, context)
predicates = self.getParameterValue(self.PREDICATE)
precision = self.getParameterValue(self.PRECISION)
oldSelection = set(inputLayer.selectedFeatureIds())
inputLayer.removeSelection()
index = QgsProcessingUtils.createSpatialIndex(inputLayer, context)
if 'disjoint' in predicates:
disjoinSet = []
for feat in QgsProcessingUtils.getFeatures(inputLayer, context):
disjoinSet.append(feat.id())
geom = QgsGeometry()
selectedSet = []
features = QgsProcessingUtils.getFeatures(selectLayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(selectLayer, context)
for current, f in enumerate(features):
geom = vector.snapToPrecision(f.geometry(), precision)
bbox = geom.boundingBox()
bbox.grow(0.51 * precision)
intersects = index.intersects(bbox)
request = QgsFeatureRequest().setFilterFids(intersects).setSubsetOfAttributes([])
for feat in inputLayer.getFeatures(request):
tmpGeom = vector.snapToPrecision(feat.geometry(), precision)
res = False
for predicate in predicates:
if predicate == 'disjoint':
if tmpGeom.intersects(geom):
try:
disjoinSet.remove(feat.id())
except:
pass # already removed
else:
res = getattr(tmpGeom, predicate)(geom)
if res:
selectedSet.append(feat.id())
break
feedback.setProgress(int(current * total))
if 'disjoint' in predicates:
selectedSet = selectedSet + disjoinSet
if method == 1:
selectedSet = list(oldSelection.union(selectedSet))
elif method == 2:
selectedSet = list(oldSelection.difference(selectedSet))
inputLayer.selectByIds(selectedSet)
self.setOutputValue(self.OUTPUT, filename)
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, parameters, context, feedback):
layers = self.getParameterValue(self.INPUT_DATASOURCES)
query = self.getParameterValue(self.INPUT_QUERY)
uid_field = self.getParameterValue(self.INPUT_UID_FIELD)
geometry_field = self.getParameterValue(self.INPUT_GEOMETRY_FIELD)
geometry_type = self.getParameterValue(self.INPUT_GEOMETRY_TYPE)
geometry_crs = self.getParameterValue(self.INPUT_GEOMETRY_CRS)
df = QgsVirtualLayerDefinition()
layerIdx = 1
if layers:
for layerSource in layers.split(';'):
layer = QgsProcessingUtils.mapLayerFromString(layerSource, context)
if layer:
df.addSource('input{}'.format(layerIdx), layer.id())
layerIdx += 1
if query == '':
raise GeoAlgorithmExecutionException(
self.tr('Empty SQL. Please enter valid SQL expression and try again.'))
else:
df.setQuery(query)
if uid_field:
df.setUid(uid_field)
if geometry_type == 1: # no geometry
df.setGeometryWkbType(QgsWkbTypes.NullGeometry)
else:
if geometry_field:
df.setGeometryField(geometry_field)
if geometry_type > 1:
df.setGeometryWkbType(geometry_type - 1)
if geometry_crs:
crs = QgsCoordinateReferenceSystem(geometry_crs)
if crs.isValid():
df.setGeometrySrid(crs.postgisSrid())
vLayer = QgsVectorLayer(df.toString(), "temp_vlayer", "virtual")
if not vLayer.isValid():
raise GeoAlgorithmExecutionException(vLayer.dataProvider().error().message())
writer = self.getOutputFromName(self.OUTPUT_LAYER).getVectorWriter(vLayer.fields(),
vLayer.wkbType() if geometry_type != 1 else 1,
vLayer.crs(), context)
features = QgsProcessingUtils.getFeatures(vLayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(vLayer, context)
outFeat = QgsFeature()
for current, inFeat in enumerate(features):
outFeat.setAttributes(inFeat.attributes())
if geometry_type != 1:
outFeat.setGeometry(inFeat.geometry())
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT_LAYER), context)
writer = self.getOutputFromName(self.OUTPUT_TABLE).getVectorWriter(
layer.fields(), QgsWkbTypes.NoGeometry,
QgsCoordinateReferenceSystem(), context)
request = QgsFeatureRequest().setFlags(QgsFeatureRequest.NoGeometry)
features = QgsProcessingUtils.getFeatures(layer, context, request)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
writer.addFeature(input_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
layer = dataobjects.getLayerFromString(
self.getParameterValue(self.INPUT_LAYER))
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
if input_feature.hasGeometry():
writer.addFeature(input_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT_LAYER), context)
valuesFieldName = self.getParameterValue(self.VALUES_FIELD_NAME)
categoriesFieldName = self.getParameterValue(
self.CATEGORIES_FIELD_NAME)
output = self.getOutputFromName(self.OUTPUT)
valuesField = layer.fields().lookupField(valuesFieldName)
categoriesField = layer.fields().lookupField(categoriesFieldName)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
values = {}
for current, feat in enumerate(features):
feedback.setProgress(int(current * total))
attrs = feat.attributes()
try:
value = float(attrs[valuesField])
cat = str(attrs[categoriesField])
if cat not in values:
values[cat] = []
values[cat].append(value)
except:
pass
fields = ['category', 'min', 'max', 'mean', 'stddev', 'sum', 'count']
writer = output.getTableWriter(fields)
stat = QgsStatisticalSummary(QgsStatisticalSummary.Min
| QgsStatisticalSummary.Max
| QgsStatisticalSummary.Mean
| QgsStatisticalSummary.StDevSample
| QgsStatisticalSummary.Sum
| QgsStatisticalSummary.Count)
for (cat, v) in list(values.items()):
stat.calculate(v)
record = [
cat,
stat.min(),
stat.max(),
stat.mean(),
stat.sampleStDev(),
stat.sum(),
stat.count()
]
writer.addRecord(record)
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT_LAYER), context)
fieldName = self.getParameterValue(self.FIELD_NAME)
outputFile = self.getOutputValue(self.OUTPUT_HTML_FILE)
request = QgsFeatureRequest().setFlags(
QgsFeatureRequest.NoGeometry).setSubsetOfAttributes([fieldName],
layer.fields())
stat = QgsStringStatisticalSummary()
features = QgsProcessingUtils.getFeatures(layer, context, request)
count = QgsProcessingUtils.featureCount(layer, context)
total = 100.0 / float(count)
for current, ft in enumerate(features):
stat.addValue(ft[fieldName])
feedback.setProgress(int(current * total))
stat.finalize()
data = []
data.append(self.tr('Analyzed layer: {}').format(layer.name()))
data.append(self.tr('Analyzed field: {}').format(fieldName))
data.append(self.tr('Minimum length: {}').format(stat.minLength()))
data.append(self.tr('Maximum length: {}').format(stat.maxLength()))
data.append(self.tr('Mean length: {}').format(stat.meanLength()))
data.append(
self.tr('Filled values: {}').format(stat.count() -
stat.countMissing()))
data.append(
self.tr('NULL (missing) values: {}').format(stat.countMissing()))
data.append(self.tr('Count: {}').format(stat.count()))
data.append(self.tr('Unique: {}').format(stat.countDistinct()))
data.append(self.tr('Minimum string value: {}').format(stat.min()))
data.append(self.tr('Maximum string value: {}').format(stat.max()))
self.createHTML(outputFile, data)
self.setOutputValue(self.MIN_LEN, stat.minLength())
self.setOutputValue(self.MAX_LEN, stat.maxLength())
self.setOutputValue(self.MEAN_LEN, stat.meanLength())
self.setOutputValue(self.FILLED, stat.count() - stat.countMissing())
self.setOutputValue(self.EMPTY, stat.countMissing())
self.setOutputValue(self.COUNT, stat.count())
self.setOutputValue(self.UNIQUE, stat.countDistinct())
self.setOutputValue(self.MIN_VALUE, stat.min())
self.setOutputValue(self.MAX_VALUE, stat.max())
def processAlgorithm(self, context, feedback):
layerHub = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.HUBS), context)
layerSpoke = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.SPOKES), context)
fieldHub = self.getParameterValue(self.HUB_FIELD)
fieldSpoke = self.getParameterValue(self.SPOKE_FIELD)
if layerHub.source() == layerSpoke.source():
raise GeoAlgorithmExecutionException(
self.tr('Same layer given for both hubs and spokes'))
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
layerSpoke.fields(), QgsWkbTypes.LineString, layerSpoke.crs(),
context)
spokes = QgsProcessingUtils.getFeatures(layerSpoke, context)
hubs = QgsProcessingUtils.getFeatures(layerHub, context)
total = 100.0 / QgsProcessingUtils.featureCount(layerSpoke, context)
for current, spokepoint in enumerate(spokes):
p = spokepoint.geometry().boundingBox().center()
spokeX = p.x()
spokeY = p.y()
spokeId = str(spokepoint[fieldSpoke])
for hubpoint in hubs:
hubId = str(hubpoint[fieldHub])
if hubId == spokeId:
p = hubpoint.geometry().boundingBox().center()
hubX = p.x()
hubY = p.y()
f = QgsFeature()
f.setAttributes(spokepoint.attributes())
f.setGeometry(
QgsGeometry.fromPolyline(
[QgsPoint(spokeX, spokeY),
QgsPoint(hubX, hubY)]))
writer.addFeature(f)
break
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
layer = dataobjects.getLayerFromString(self.getParameterValue(self.POINTS))
output = self.getOutputValue(self.OUTPUT)
spatialIndex = vector.spatialindex(layer)
neighbour = QgsFeature()
distance = QgsDistanceArea()
sumDist = 0.00
A = layer.extent()
A = float(A.width() * A.height())
features = QgsProcessingUtils.getFeatures(layer, context)
count = QgsProcessingUtils.featureCount(layer, context)
total = 100.0 / count
for current, feat in enumerate(features):
neighbourID = spatialIndex.nearestNeighbor(
feat.geometry().asPoint(), 2)[1]
request = QgsFeatureRequest().setFilterFid(neighbourID).setSubsetOfAttributes([])
neighbour = next(layer.getFeatures(request))
sumDist += distance.measureLine(neighbour.geometry().asPoint(),
feat.geometry().asPoint())
feedback.setProgress(int(current * total))
do = float(sumDist) / count
de = float(0.5 / math.sqrt(count / A))
d = float(do / de)
SE = float(0.26136 / math.sqrt(count ** 2 / A))
zscore = float((do - de) / SE)
data = []
data.append('Observed mean distance: ' + str(do))
data.append('Expected mean distance: ' + str(de))
data.append('Nearest neighbour index: ' + str(d))
data.append('Number of points: ' + str(count))
data.append('Z-Score: ' + str(zscore))
self.createHTML(output, data)
self.setOutputValue(self.OBSERVED_MD, float(data[0].split(': ')[1]))
self.setOutputValue(self.EXPECTED_MD, float(data[1].split(': ')[1]))
self.setOutputValue(self.NN_INDEX, float(data[2].split(': ')[1]))
self.setOutputValue(self.POINT_COUNT, float(data[3].split(': ')[1]))
self.setOutputValue(self.Z_SCORE, float(data[4].split(': ')[1]))
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT), context)
fieldName = self.getParameterValue(self.FIELD)
geomType = QgsWkbTypes.multiType(layer.wkbType())
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
layer.fields(), geomType, layer.crs(), context)
outFeat = QgsFeature()
inGeom = QgsGeometry()
index = layer.fields().lookupField(fieldName)
collection_geom = {}
collection_attrs = {}
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, feature in enumerate(features):
atMap = feature.attributes()
idVar = atMap[index]
if idVar in [None, NULL]:
outFeat.setAttributes(atMap)
outFeat.setGeometry(feature.geometry())
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
continue
key = str(idVar).strip()
if key not in collection_geom:
collection_geom[key] = []
collection_attrs[key] = atMap
inGeom = feature.geometry()
collection_geom[key].append(inGeom)
feedback.setProgress(int(current * total))
for key, geoms in collection_geom.items():
outFeat.setAttributes(collection_attrs[key])
outFeat.setGeometry(QgsGeometry.collectGeometry(geoms))
writer.addFeature(outFeat)
del writer
def processAlgorithm(self, context, feedback):
vlayer = dataobjects.getLayerFromString(self.getParameterValue(self.INPUT))
output = self.getOutputFromName(self.OUTPUT)
if self.getParameterValue(self.FIELDS):
fields = vlayer.fields()
else:
fields = QgsFields()
if self.getParameterValue(self.GEOMETRY):
fieldsCount = fields.count()
fields.append(QgsField('area', QVariant.Double, 'double', 16, 2))
fields.append(QgsField('perimeter', QVariant.Double,
'double', 16, 2))
allLinesList = []
features = QgsProcessingUtils.getFeatures(vlayer, context, QgsFeatureRequest().setSubsetOfAttributes([]))
feedback.pushInfo(self.tr('Processing lines...'))
total = 40.0 / QgsProcessingUtils.featureCount(vlayer, context)
for current, inFeat in enumerate(features):
if inFeat.geometry():
allLinesList.append(inFeat.geometry())
feedback.setProgress(int(current * total))
feedback.setProgress(40)
feedback.pushInfo(self.tr('Noding lines...'))
allLines = QgsGeometry.unaryUnion(allLinesList)
feedback.setProgress(45)
feedback.pushInfo(self.tr('Polygonizing...'))
polygons = QgsGeometry.polygonize([allLines])
if polygons.isEmpty():
raise GeoAlgorithmExecutionException(self.tr('No polygons were created!'))
feedback.setProgress(50)
feedback.pushInfo('Saving polygons...')
writer = output.getVectorWriter(fields, QgsWkbTypes.Polygon, vlayer.crs(), context)
total = 50.0 / polygons.geometry().numGeometries()
for i in range(polygons.geometry().numGeometries()):
outFeat = QgsFeature()
geom = QgsGeometry(polygons.geometry().geometryN(i).clone())
outFeat.setGeometry(geom)
if self.getParameterValue(self.GEOMETRY):
outFeat.setAttributes([None] * fieldsCount + [geom.geometry().area(),
geom.geometry().perimeter()])
writer.addFeature(outFeat)
feedback.setProgress(50 + int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT), context)
distance = self.getParameterValue(self.DISTANCE)
start_offset = self.getParameterValue(self.START_OFFSET)
end_offset = self.getParameterValue(self.END_OFFSET)
fields = layer.fields()
fields.append(QgsField('distance', QVariant.Double))
fields.append(QgsField('angle', QVariant.Double))
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fields, QgsWkbTypes.Point, layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
input_geometry = input_feature.geometry()
if not input_geometry:
writer.addFeature(input_feature)
else:
if input_geometry.type == QgsWkbTypes.PolygonGeometry:
length = input_geometry.geometry().perimeter()
else:
length = input_geometry.length() - end_offset
current_distance = start_offset
while current_distance <= length:
point = input_geometry.interpolate(current_distance)
angle = math.degrees(
input_geometry.interpolateAngle(current_distance))
output_feature = QgsFeature()
output_feature.setGeometry(point)
attrs = input_feature.attributes()
attrs.append(current_distance)
attrs.append(angle)
output_feature.setAttributes(attrs)
writer.addFeature(output_feature)
current_distance += distance
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
vlayer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
output = self.getOutputFromName(self.OUTPUT)
fields = vlayer.fields()
writer = output.getVectorWriter(fields, QgsWkbTypes.LineString, vlayer.crs(), context)
outFeat = QgsFeature()
features = QgsProcessingUtils.getFeatures(vlayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(vlayer, context)
for current, feature in enumerate(features):
feedback.setProgress(int(current * total))
inGeom = feature.geometry()
atMap = feature.attributes()
segments = self.extractAsSingleSegments(inGeom)
outFeat.setAttributes(atMap)
for segment in segments:
outFeat.setGeometry(segment)
writer.addFeature(outFeat)
del writer
def featureOmbb(self, layer, context, writer, feedback):
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
outFeat = QgsFeature()
for current, inFeat in enumerate(features):
geometry, area, angle, width, height = inFeat.geometry().orientedMinimumBoundingBox()
if geometry:
outFeat.setGeometry(geometry)
attrs = inFeat.attributes()
attrs.extend([area,
width * 2 + height * 2,
angle,
width,
height])
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
else:
feedback.pushInfo(self.tr("Can't calculate an OMBB for feature {0}.").format(inFeat.id()))
feedback.setProgress(int(current * total))
def linearMatrix(self, context, inLayer, inField, targetLayer, targetField,
matType, nPoints, feedback):
if matType == 0:
self.writer.addRecord(['InputID', 'TargetID', 'Distance'])
else:
self.writer.addRecord(['InputID', 'MEAN', 'STDDEV', 'MIN', 'MAX'])
index = QgsProcessingUtils.createSpatialIndex(targetLayer, context)
inIdx = inLayer.fields().lookupField(inField)
outIdx = targetLayer.fields().lookupField(targetField)
distArea = QgsDistanceArea()
features = QgsProcessingUtils.getFeatures(inLayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(inLayer, context)
for current, inFeat in enumerate(features):
inGeom = inFeat.geometry()
inID = str(inFeat.attributes()[inIdx])
featList = index.nearestNeighbor(inGeom.asPoint(), nPoints)
distList = []
vari = 0.0
request = QgsFeatureRequest().setFilterFids(featList).setSubsetOfAttributes([outIdx])
for outFeat in targetLayer.getFeatures(request):
outID = outFeat.attributes()[outIdx]
outGeom = outFeat.geometry()
dist = distArea.measureLine(inGeom.asPoint(),
outGeom.asPoint())
if matType == 0:
self.writer.addRecord([inID, str(outID), str(dist)])
else:
distList.append(float(dist))
if matType != 0:
mean = sum(distList) / len(distList)
for i in distList:
vari += (i - mean) * (i - mean)
vari = math.sqrt(vari / len(distList))
self.writer.addRecord([inID, str(mean),
str(vari), str(min(distList)),
str(max(distList))])
feedback.setProgress(int(current * total))
def processAlgorithm(self, context, feedback):
output = self.getOutputFromName(self.OUTPUT)
vlayer = \
QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
fields = vlayer.fields()
fields.append(QgsField('AUTO', QVariant.Int))
writer = output.getVectorWriter(fields, vlayer.wkbType(), vlayer.crs(), context)
outFeat = QgsFeature()
features = QgsProcessingUtils.getFeatures(vlayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(vlayer, context)
for current, feat in enumerate(features):
feedback.setProgress(int(current * total))
geom = feat.geometry()
outFeat.setGeometry(geom)
attrs = feat.attributes()
attrs.append(current)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT), context)
tolerance = self.getParameterValue(self.TOLERANCE)
method = self.getParameterValue(self.METHOD)
pointsBefore = 0
pointsAfter = 0
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
layer.fields(), layer.wkbType(), layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
if method != 0:
simplifier = QgsMapToPixelSimplifier(
QgsMapToPixelSimplifier.SimplifyGeometry, tolerance, method)
for current, input_feature in enumerate(features):
out_feature = input_feature
if input_feature.geometry():
input_geometry = input_feature.geometry()
pointsBefore += input_geometry.geometry().nCoordinates()
if method == 0: # distance
output_geometry = input_geometry.simplify(tolerance)
else:
output_geometry = simplifier.simplify(input_geometry)
pointsAfter += output_geometry.geometry().nCoordinates()
out_feature.setGeometry(output_geometry)
writer.addFeature(out_feature)
feedback.setProgress(int(current * total))
del writer
QgsMessageLog.logMessage(
self.
tr('Simplify: Input geometries have been simplified from {0} to {1} points'
).format(pointsBefore, pointsAfter), self.tr('Processing'),
QgsMessageLog.INFO)
def featureExtent(self, layer, context, writer, feedback):
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
feat = QgsFeature()
for current, f in enumerate(features):
rect = f.geometry().boundingBox()
minx = rect.xMinimum()
miny = rect.yMinimum()
maxx = rect.xMaximum()
maxy = rect.yMaximum()
height = rect.height()
width = rect.width()
cntx = minx + width / 2.0
cnty = miny + height / 2.0
area = width * height
perim = 2 * width + 2 * height
rect = [
QgsPoint(minx, miny),
QgsPoint(minx, maxy),
QgsPoint(maxx, maxy),
QgsPoint(maxx, miny),
QgsPoint(minx, miny)
]
geometry = QgsGeometry().fromPolygon([rect])
feat.setGeometry(geometry)
attrs = [
minx,
miny,
maxx,
maxy,
cntx,
cnty,
area,
perim,
height,
width,
]
feat.setAttributes(attrs)
writer.addFeature(feat)
feedback.setProgress(int(current * total))
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(layer.fields(), QgsWkbTypes.Point, layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
output_feature = input_feature
if input_feature.geometry():
output_geometry = input_feature.geometry().centroid()
if not output_geometry:
QgsMessageLog.logMessage('Error calculating centroid for feature {}'.format(input_feature.id()), self.tr('Processing'), QgsMessageLog.WARNING)
output_feature.setGeometry(output_geometry)
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), QgsWkbTypes.LineString,
layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
if f.hasGeometry():
lines = QgsGeometry(f.geometry().geometry().boundary()).asGeometryCollection()
for line in lines:
f.setGeometry(line)
writer.addFeature(f)
else:
writer.addFeature(f)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
vertices = self.getParameterValue(self.VERTICES)
isPolygon = layer.geometryType() == QgsWkbTypes.PolygonGeometry
writer = self.getOutputFromName(
self.OUTPUT).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
feature = f
if feature.hasGeometry():
new_geometry = feature.geometry().densifyByCount(int(vertices))
feature.setGeometry(new_geometry)
writer.addFeature(feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
layerA = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(Difference.INPUT), context)
layerB = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(Difference.OVERLAY), context)
geomType = QgsWkbTypes.multiType(layerA.wkbType())
writer = self.getOutputFromName(Difference.OUTPUT).getVectorWriter(
layerA.fields(), geomType, layerA.crs(), context)
outFeat = QgsFeature()
index = QgsProcessingUtils.createSpatialIndex(layerB, context)
selectionA = QgsProcessingUtils.getFeatures(layerA, context)
total = 100.0 / QgsProcessingUtils.featureCount(layerA, context)
for current, inFeatA in enumerate(selectionA):
geom = inFeatA.geometry()
diff_geom = QgsGeometry(geom)
attrs = inFeatA.attributes()
intersections = index.intersects(geom.boundingBox())
request = QgsFeatureRequest().setFilterFids(
intersections).setSubsetOfAttributes([])
for inFeatB in layerB.getFeatures(request):
tmpGeom = inFeatB.geometry()
if diff_geom.intersects(tmpGeom):
diff_geom = QgsGeometry(diff_geom.difference(tmpGeom))
try:
outFeat.setGeometry(diff_geom)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
except:
QgsMessageLog.logMessage(
self.
tr('Feature geometry error: One or more output features ignored due to invalid geometry.'
), self.tr('Processing'), QgsMessageLog.WARNING)
continue
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
field_name = self.getParameterValue(self.FIELD_NAME)
field = layer.fields().at(layer.fields().lookupField(field_name))
output_file = self.getOutputValue(self.OUTPUT_HTML_FILE)
request = QgsFeatureRequest().setFlags(QgsFeatureRequest.NoGeometry).setSubsetOfAttributes([field_name], layer.fields())
features = QgsProcessingUtils.getFeatures(layer, context, request)
count = QgsProcessingUtils.featureCount(layer, context)
data = []
data.append(self.tr('Analyzed layer: {}').format(layer.name()))
data.append(self.tr('Analyzed field: {}').format(field_name))
if field.isNumeric():
data.extend(self.calcNumericStats(features, feedback, field, count))
elif field.type() in (QVariant.Date, QVariant.Time, QVariant.DateTime):
data.extend(self.calcDateTimeStats(features, feedback, field, count))
else:
data.extend(self.calcStringStats(features, feedback, field, count))
self.createHTML(output_file, data)
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT_LAYER), context)
tolerance = self.getParameterValue(self.TOLERANCE)
fields = layer.fields()
fields.append(QgsField('dist_pole', QVariant.Double))
writer = self.getOutputFromName(self.OUTPUT_LAYER).getVectorWriter(
fields, QgsWkbTypes.Point, layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
output_feature = input_feature
input_geometry = input_feature.geometry()
if input_geometry:
output_geometry, distance = input_geometry.poleOfInaccessibility(
tolerance)
if not output_geometry:
raise GeoAlgorithmExecutionException(
self.tr('Error calculating pole of inaccessibility'))
attrs = input_feature.attributes()
attrs.append(distance)
output_feature.setAttributes(attrs)
output_feature.setGeometry(output_geometry)
else:
attrs = input_feature.attributes()
attrs.append(NULL)
output_feature.setAttributes(attrs)
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT_LAYER), context)
input_wkb = layer.wkbType()
if QgsWkbTypes.geometryType(input_wkb) == QgsWkbTypes.LineGeometry:
output_wkb = QgsWkbTypes.MultiPoint
elif QgsWkbTypes.geometryType(
input_wkb) == QgsWkbTypes.PolygonGeometry:
output_wkb = QgsWkbTypes.MultiLineString
if QgsWkbTypes.hasZ(input_wkb):
output_wkb = QgsWkbTypes.addZ(output_wkb)
if QgsWkbTypes.hasM(input_wkb):
output_wkb = QgsWkbTypes.addM(output_wkb)
writer = self.getOutputFromName(self.OUTPUT_LAYER).getVectorWriter(
layer.fields(), output_wkb, layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
output_feature = input_feature
input_geometry = input_feature.geometry()
if input_geometry:
output_geometry = QgsGeometry(
input_geometry.geometry().boundary())
if not output_geometry:
raise GeoAlgorithmExecutionException(
self.tr('Error calculating boundary'))
output_feature.setGeometry(output_geometry)
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT), context)
reference_layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.REFERENCE_LAYER), context)
tolerance = self.getParameterValue(self.TOLERANCE)
mode = self.getParameterValue(self.BEHAVIOR)
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
layer.fields(), layer.wkbType(), layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
self.processed = 0
self.feedback = feedback
self.total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
if self.getParameterValue(self.INPUT) != self.getParameterValue(
self.REFERENCE_LAYER):
snapper = QgsGeometrySnapper(reference_layer)
snapper.featureSnapped.connect(self.featureSnapped)
snapped_features = snapper.snapFeatures(features, tolerance, mode)
for f in snapped_features:
writer.addFeature(QgsFeature(f))
else:
# snapping internally
snapper = QgsInternalGeometrySnapper(tolerance, mode)
processed = 0
for f in features:
out_feature = f
out_feature.setGeometry(snapper.snapFeature(f))
writer.addFeature(out_feature)
processed += 1
feedback.setProgress(processed * self.total)
del writer
def layerOmmb(self, layer, context, writer, feedback):
req = QgsFeatureRequest().setSubsetOfAttributes([])
features = QgsProcessingUtils.getFeatures(layer, context, req)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
newgeometry = QgsGeometry()
first = True
for current, inFeat in enumerate(features):
if first:
newgeometry = inFeat.geometry()
first = False
else:
newgeometry = newgeometry.combine(inFeat.geometry())
feedback.setProgress(int(current * total))
geometry, area, angle, width, height = newgeometry.orientedMinimumBoundingBox(
)
if geometry:
outFeat = QgsFeature()
outFeat.setGeometry(geometry)
outFeat.setAttributes(
[area, width * 2 + height * 2, angle, width, height])
writer.addFeature(outFeat)
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT), context)
fields = layer.fields()
fields.append(QgsField('node_index', QVariant.Int))
fields.append(QgsField('distance', QVariant.Double))
fields.append(QgsField('angle', QVariant.Double))
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fields, QgsWkbTypes.Point, layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, f in enumerate(features):
input_geometry = f.geometry()
if not input_geometry:
writer.addFeature(f)
else:
points = vector.extractPoints(input_geometry)
for i, point in enumerate(points):
distance = input_geometry.distanceToVertex(i)
angle = math.degrees(input_geometry.angleAtVertex(i))
attrs = f.attributes()
attrs.append(i)
attrs.append(distance)
attrs.append(angle)
output_feature = QgsFeature()
output_feature.setAttributes(attrs)
output_feature.setGeometry(QgsGeometry.fromPoint(point))
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_LAYER), context)
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(layer.fields(), QgsWkbTypes.Point, layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
for current, input_feature in enumerate(features):
output_feature = input_feature
input_geometry = input_feature.geometry()
if input_geometry:
output_geometry = input_geometry.pointOnSurface()
if not output_geometry:
raise GeoAlgorithmExecutionException(
self.tr('Error calculating point on surface'))
output_feature.setGeometry(output_geometry)
writer.addFeature(output_feature)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.INPUT_LAYER), context)
fieldName = self.getParameterValue(self.FIELD_NAME)
fieldType = self.TYPES[self.getParameterValue(self.FIELD_TYPE)]
width = self.getParameterValue(self.FIELD_LENGTH)
precision = self.getParameterValue(self.FIELD_PRECISION)
newField = self.getParameterValue(self.NEW_FIELD)
formula = self.getParameterValue(self.FORMULA)
output = self.getOutputFromName(self.OUTPUT_LAYER)
fields = layer.fields()
if newField:
fields.append(QgsField(fieldName, fieldType, '', width, precision))
writer = output.getVectorWriter(fields, layer.wkbType(), layer.crs(),
context)
exp = QgsExpression(formula)
da = QgsDistanceArea()
da.setSourceCrs(layer.crs())
da.setEllipsoid(QgsProject.instance().ellipsoid())
exp.setGeomCalculator(da)
exp.setDistanceUnits(QgsProject.instance().distanceUnits())
exp.setAreaUnits(QgsProject.instance().areaUnits())
exp_context = QgsExpressionContext(
QgsExpressionContextUtils.globalProjectLayerScopes(layer))
if not exp.prepare(exp_context):
raise GeoAlgorithmExecutionException(
self.tr('Evaluation error: {0}').format(exp.evalErrorString()))
outFeature = QgsFeature()
outFeature.initAttributes(len(fields))
outFeature.setFields(fields)
error = ''
calculationSuccess = True
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
rownum = 1
for current, f in enumerate(features):
rownum = current + 1
exp_context.setFeature(f)
exp_context.lastScope().setVariable("row_number", rownum)
value = exp.evaluate(exp_context)
if exp.hasEvalError():
calculationSuccess = False
error = exp.evalErrorString()
break
else:
outFeature.setGeometry(f.geometry())
for fld in f.fields():
outFeature[fld.name()] = f[fld.name()]
outFeature[fieldName] = value
writer.addFeature(outFeature)
feedback.setProgress(int(current * total))
del writer
if not calculationSuccess:
raise GeoAlgorithmExecutionException(
self.tr('An error occurred while evaluating the calculation '
'string:\n{0}').format(error))
def buffering(feedback,
context,
writer,
distance,
field,
useField,
layer,
dissolve,
segments,
endCapStyle=1,
joinStyle=1,
mitreLimit=2):
if useField:
field = layer.fields().lookupField(field)
outFeat = QgsFeature()
current = 0
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
# With dissolve
if dissolve:
buffered_geometries = []
for inFeat in features:
attrs = inFeat.attributes()
if useField:
value = attrs[field]
else:
value = distance
inGeom = inFeat.geometry()
buffered_geometries.append(
inGeom.buffer(float(value), segments, endCapStyle, joinStyle,
mitreLimit))
current += 1
feedback.setProgress(int(current * total))
final_geometry = QgsGeometry.unaryUnion(buffered_geometries)
outFeat.setGeometry(final_geometry)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
else:
# Without dissolve
for inFeat in features:
attrs = inFeat.attributes()
if useField:
value = attrs[field]
else:
value = distance
inGeom = inFeat.geometry()
outFeat = QgsFeature()
outGeom = inGeom.buffer(float(value), segments, endCapStyle,
joinStyle, mitreLimit)
outFeat.setGeometry(outGeom)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
current += 1
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, context, feedback):
layer = self.getParameterValue(self.INPUT_LAYER)
mapping = self.getParameterValue(self.FIELDS_MAPPING)
output = self.getOutputFromName(self.OUTPUT_LAYER)
layer = QgsProcessingUtils.mapLayerFromString(layer, context)
fields = QgsFields()
expressions = []
da = QgsDistanceArea()
da.setSourceCrs(layer.crs())
da.setEllipsoid(QgsProject.instance().ellipsoid())
exp_context = layer.createExpressionContext()
for field_def in mapping:
fields.append(
QgsField(field_def['name'], field_def['type'],
field_def['length'], field_def['precision']))
expression = QgsExpression(field_def['expression'])
expression.setGeomCalculator(da)
expression.setDistanceUnits(QgsProject.instance().distanceUnits())
expression.setAreaUnits(QgsProject.instance().areaUnits())
expression.prepare(exp_context)
if expression.hasParserError():
raise GeoAlgorithmExecutionException(
self.tr(u'Parser error in expression "{}": {}').format(
str(expression.expression()),
str(expression.parserErrorString())))
expressions.append(expression)
writer = output.getVectorWriter(fields, layer.wkbType(), layer.crs(),
context)
# Create output vector layer with new attributes
error_exp = None
inFeat = QgsFeature()
outFeat = QgsFeature()
features = QgsProcessingUtils.getFeatures(layer, context)
count = QgsProcessingUtils.featureCount(layer, context)
if count > 0:
total = 100.0 / count
for current, inFeat in enumerate(features):
rownum = current + 1
geometry = inFeat.geometry()
outFeat.setGeometry(geometry)
attrs = []
for i in range(0, len(mapping)):
field_def = mapping[i]
expression = expressions[i]
exp_context.setFeature(inFeat)
exp_context.lastScope().setVariable("row_number", rownum)
value = expression.evaluate(exp_context)
if expression.hasEvalError():
error_exp = expression
break
attrs.append(value)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
else:
feedback.setProgress(100)
del writer
if error_exp is not None:
raise GeoAlgorithmExecutionException(
self.tr(u'Evaluation error in expression "{}": {}').format(
str(error_exp.expression()),
str(error_exp.parserErrorString())))
def processAlgorithm(self, context, feedback):
layer = QgsProcessingUtils.mapLayerFromString(
self.getParameterValue(self.POINTS), context)
weightField = self.getParameterValue(self.WEIGHT)
uniqueField = self.getParameterValue(self.UID)
if weightField is None:
weightIndex = -1
else:
weightIndex = layer.fields().lookupField(weightField)
if uniqueField is None:
uniqueIndex = -1
else:
uniqueIndex = layer.fields().lookupField(uniqueField)
fieldList = QgsFields()
fieldList.append(QgsField('MEAN_X', QVariant.Double, '', 24, 15))
fieldList.append(QgsField('MEAN_Y', QVariant.Double, '', 24, 15))
fieldList.append(QgsField('UID', QVariant.String, '', 255))
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
fieldList, QgsWkbTypes.Point, layer.crs(), context)
features = QgsProcessingUtils.getFeatures(layer, context)
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
means = {}
for current, feat in enumerate(features):
feedback.setProgress(int(current * total))
if uniqueIndex == -1:
clazz = "Single class"
else:
clazz = str(feat.attributes()[uniqueIndex]).strip()
if weightIndex == -1:
weight = 1.00
else:
try:
weight = float(feat.attributes()[weightIndex])
except:
weight = 1.00
if weight < 0:
raise GeoAlgorithmExecutionException(
self.
tr('Negative weight value found. Please fix your data and try again.'
))
if clazz not in means:
means[clazz] = (0, 0, 0)
(cx, cy, totalweight) = means[clazz]
geom = QgsGeometry(feat.geometry())
geom = vector.extractPoints(geom)
for i in geom:
cx += i.x() * weight
cy += i.y() * weight
totalweight += weight
means[clazz] = (cx, cy, totalweight)
current = 0
total = 100.0 / len(means)
for (clazz, values) in list(means.items()):
outFeat = QgsFeature()
cx = values[0] / values[2]
cy = values[1] / values[2]
meanPoint = QgsPoint(cx, cy)
outFeat.setGeometry(QgsGeometry.fromPoint(meanPoint))
outFeat.setAttributes([cx, cy, clazz])
writer.addFeature(outFeat)
current += 1
feedback.setProgress(int(current * total))
del writer
