def processAlgorithm(self, progress):
vlayerA = QGisLayers.getObjectFromUri(
self.getParameterValue(Intersection.INPUT))
vlayerB = QGisLayers.getObjectFromUri(
self.getParameterValue(Intersection.INPUT2))
vproviderA = vlayerA.dataProvider()
fields = utils.combineVectorFields(vlayerA, vlayerB)
writer = self.getOutputFromName(Intersection.OUTPUT).getVectorWriter(
fields, vproviderA.geometryType(), vproviderA.crs())
inFeatA = QgsFeature()
inFeatB = QgsFeature()
outFeat = QgsFeature()
index = utils.createSpatialIndex(vlayerB)
nElement = 0
selectionA = QGisLayers.features(vlayerA)
nFeat = len(selectionA)
for inFeatA in selectionA:
nElement += 1
progress.setPercentage(nElement / float(nFeat) * 100)
geom = QgsGeometry(inFeatA.geometry())
atMapA = inFeatA.attributes()
intersects = index.intersects(geom.boundingBox())
for i in intersects:
request = QgsFeatureRequest().setFilterFid(i)
inFeatB = vlayerB.getFeatures(request).next()
tmpGeom = QgsGeometry(inFeatB.geometry())
if geom.intersects(tmpGeom):
atMapB = inFeatB.attributes()
int_geom = QgsGeometry(geom.intersection(tmpGeom))
if int_geom.wkbType() == 7:
int_com = geom.combine(tmpGeom)
int_sym = geom.symDifference(tmpGeom)
int_geom = QgsGeometry(int_com.difference(int_sym))
outFeat.setGeometry(int_geom)
attrs = []
attrs.extend(atMapA)
attrs.extend(atMapB)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
del writer
def processAlgorithm(self, progress):
vlayerA = QGisLayers.getObjectFromUri(self.getParameterValue(Intersection.INPUT))
vlayerB = QGisLayers.getObjectFromUri(self.getParameterValue(Intersection.INPUT2))
vproviderA = vlayerA.dataProvider()
fields = utils.combineVectorFields(vlayerA, vlayerB)
writer = self.getOutputFromName(Intersection.OUTPUT).getVectorWriter(fields, vproviderA.geometryType(), vproviderA.crs() )
inFeatA = QgsFeature()
inFeatB = QgsFeature()
outFeat = QgsFeature()
index = utils.createSpatialIndex(vlayerB)
nElement = 0
selectionA = QGisLayers.features(vlayerA)
nFeat = len(selectionA)
for inFeatA in selectionA:
nElement += 1
progress.setPercentage(nElement/float(nFeat) * 100)
geom = QgsGeometry( inFeatA.geometry() )
atMapA = inFeatA.attributes()
intersects = index.intersects( geom.boundingBox() )
for i in intersects:
request = QgsFeatureRequest().setFilterFid(i)
inFeatB = vlayerB.getFeatures(request).next()
tmpGeom = QgsGeometry(inFeatB.geometry())
if geom.intersects( tmpGeom ):
atMapB = inFeatB.attributes()
int_geom = QgsGeometry( geom.intersection( tmpGeom ) )
if int_geom.wkbType() == 7:
int_com = geom.combine( tmpGeom )
int_sym = geom.symDifference( tmpGeom )
int_geom = QgsGeometry( int_com.difference( int_sym ) )
outFeat.setGeometry( int_geom )
attrs = []
attrs.extend(atMapA)
attrs.extend(atMapB)
outFeat.setAttributes(attrs)
writer.addFeature( outFeat )
del writer
def processAlgorithm(self, progress):
vlayerA = QGisLayers.getObjectFromUri(self.getParameterValue(Union.INPUT))
vlayerB = QGisLayers.getObjectFromUri(self.getParameterValue(Union.INPUT2))
GEOS_EXCEPT = True
FEATURE_EXCEPT = True
vproviderA = vlayerA.dataProvider()
fields = utils.combineVectorFields(vlayerA, vlayerB )
names = [field.name() for field in fields]
ProcessingLog.addToLog(ProcessingLog.LOG_INFO, str(names))
writer = self.getOutputFromName(Union.OUTPUT).getVectorWriter(fields, vproviderA.geometryType(), vproviderA.crs() )
inFeatA = QgsFeature()
inFeatB = QgsFeature()
outFeat = QgsFeature()
indexA = utils.createSpatialIndex(vlayerB)
indexB = utils.createSpatialIndex(vlayerA)
count = 0
nElement = 0
featuresA = QGisLayers.features(vlayerA)
nFeat = len(featuresA)
for inFeatA in featuresA:
progress.setPercentage(nElement/float(nFeat) * 50)
nElement += 1
found = False
geom = QgsGeometry( inFeatA.geometry() )
diff_geom = QgsGeometry( geom )
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
raise GeoAlgorithmExecutionException("Feature exception while computing union")
else:
for id in intersects:
count += 1
request = QgsFeatureRequest().setFilterFid(id)
inFeatB = vlayerB.getFeatures(request).next()
atMapB = inFeatB.attributes()
tmpGeom = QgsGeometry( inFeatB.geometry() )
if geom.intersects( tmpGeom ):
found = True
int_geom = geom.intersection( tmpGeom )
if int_geom is None:
# There was a problem creating the intersection
raise GeoAlgorithmExecutionException("Geometry exception while computing intersection")
else:
int_geom = QgsGeometry(int_geom)
if diff_geom.intersects( tmpGeom ):
diff_geom = diff_geom.difference( tmpGeom )
if diff_geom is None:
# It's possible there was an error here?
diff_geom = QgsGeometry()
else:
diff_geom = QgsGeometry(diff_geom)
if int_geom.wkbType() == 0:
# 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 )
attrs = []
attrs.extend(atMapA)
attrs.extend(atMapB)
outFeat.setAttributes(attrs)
writer.addFeature( outFeat )
except Exception, err:
raise GeoAlgorithmExecutionException("Feature exception while computing union")
else:
# this only happends if the bounding box
# intersects, but the geometry doesn't
try:
outFeat.setGeometry( geom )
outFeat.setAttributes( atMapA )
writer.addFeature( outFeat )
except:
# also shoudn't ever happen
raise GeoAlgorithmExecutionException("Feature exception while computing union")
if found:
try:
if diff_geom.wkbType() == 0:
temp_list = diff_geom.asGeometryCollection()
for i in temp_list:
if i.type() == geom.type():
diff_geom = QgsGeometry( i )
outFeat.setGeometry( diff_geom )
outFeat.setAttributes( atMapA )
writer.addFeature( outFeat )
except Exception, err:
raise GeoAlgorithmExecutionException("Feature exception while computing union")
