本文整理汇总了Python中qgis.core.QgsFeatureRequest.setDestinationCrs方法的典型用法代码示例。如果您正苦于以下问题:Python QgsFeatureRequest.setDestinationCrs方法的具体用法?Python QgsFeatureRequest.setDestinationCrs怎么用?Python QgsFeatureRequest.setDestinationCrs使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.core.QgsFeatureRequest
的用法示例。
在下文中一共展示了QgsFeatureRequest.setDestinationCrs方法的10个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: processAlgorithm
# 需要导入模块: from qgis.core import QgsFeatureRequest [as 别名]
# 或者: from qgis.core.QgsFeatureRequest import setDestinationCrs [as 别名]
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())
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
sourceA.fields(), geomType, sourceA.sourceCrs())
featB = QgsFeature()
outFeat = QgsFeature()
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
if featA.hasGeometry():
geom = featA.geometry()
diffGeom = QgsGeometry(geom)
attrs = featA.attributes()
intersects = indexB.intersects(geom.boundingBox())
request = QgsFeatureRequest().setFilterFids(intersects).setSubsetOfAttributes([])
request.setDestinationCrs(sourceA.sourceCrs(), context.transformContext())
for featB in sourceB.getFeatures(request):
if feedback.isCanceled():
break
tmpGeom = featB.geometry()
if diffGeom.intersects(tmpGeom):
diffGeom = QgsGeometry(diffGeom.difference(tmpGeom))
outFeat.setGeometry(diffGeom)
outFeat.setAttributes(attrs)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
else:
sink.addFeature(featA, QgsFeatureSink.FastInsert)
count += 1
feedback.setProgress(int(count * total))
return {self.OUTPUT: dest_id}
示例2: processAlgorithm
# 需要导入模块: from qgis.core import QgsFeatureRequest [as 别名]
# 或者: from qgis.core.QgsFeatureRequest import setDestinationCrs [as 别名]
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)
#.........这里部分代码省略.........
示例3: processAlgorithm
# 需要导入模块: from qgis.core import QgsFeatureRequest [as 别名]
# 或者: from qgis.core.QgsFeatureRequest import setDestinationCrs [as 别名]
def processAlgorithm(self, parameters, context, feedback):
network = self.parameterAsSource(parameters, self.INPUT, context)
if network is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
startPoints = self.parameterAsSource(parameters, self.START_POINTS, context)
if startPoints is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.START_POINTS))
strategy = self.parameterAsEnum(parameters, self.STRATEGY, context)
travelCost = self.parameterAsDouble(parameters, self.TRAVEL_COST, context)
directionFieldName = self.parameterAsString(parameters, self.DIRECTION_FIELD, context)
forwardValue = self.parameterAsString(parameters, self.VALUE_FORWARD, context)
backwardValue = self.parameterAsString(parameters, self.VALUE_BACKWARD, context)
bothValue = self.parameterAsString(parameters, self.VALUE_BOTH, context)
defaultDirection = self.parameterAsEnum(parameters, self.DEFAULT_DIRECTION, context)
speedFieldName = self.parameterAsString(parameters, self.SPEED_FIELD, context)
defaultSpeed = self.parameterAsDouble(parameters, self.DEFAULT_SPEED, context)
tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context)
include_bounds = True # default to true to maintain 3.0 API
if self.INCLUDE_BOUNDS in parameters:
include_bounds = self.parameterAsBool(parameters, self.INCLUDE_BOUNDS, context)
fields = startPoints.fields()
fields.append(QgsField('type', QVariant.String, '', 254, 0))
fields.append(QgsField('start', QVariant.String, '', 254, 0))
feat = QgsFeature()
feat.setFields(fields)
directionField = -1
if directionFieldName:
directionField = network.fields().lookupField(directionFieldName)
speedField = -1
if speedFieldName:
speedField = network.fields().lookupField(speedFieldName)
director = QgsVectorLayerDirector(network,
directionField,
forwardValue,
backwardValue,
bothValue,
defaultDirection)
distUnit = context.project().crs().mapUnits()
multiplier = QgsUnitTypes.fromUnitToUnitFactor(distUnit, QgsUnitTypes.DistanceMeters)
if strategy == 0:
strategy = QgsNetworkDistanceStrategy()
else:
strategy = QgsNetworkSpeedStrategy(speedField,
defaultSpeed,
multiplier * 1000.0 / 3600.0)
director.addStrategy(strategy)
builder = QgsGraphBuilder(network.sourceCrs(),
True,
tolerance)
feedback.pushInfo(QCoreApplication.translate('ServiceAreaFromLayer', 'Loading start points…'))
request = QgsFeatureRequest()
request.setDestinationCrs(network.sourceCrs(), context.transformContext())
features = startPoints.getFeatures(request)
total = 100.0 / startPoints.featureCount() if startPoints.featureCount() else 0
points = []
source_attributes = {}
i = 0
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not f.hasGeometry():
continue
for p in f.geometry().vertices():
points.append(QgsPointXY(p))
source_attributes[i] = f.attributes()
i += 1
feedback.setProgress(int(current * total))
feedback.pushInfo(QCoreApplication.translate('ServiceAreaFromLayer', 'Building graph…'))
snappedPoints = director.makeGraph(builder, points, feedback)
feedback.pushInfo(QCoreApplication.translate('ServiceAreaFromLayer', 'Calculating service areas…'))
graph = builder.graph()
(point_sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, QgsWkbTypes.MultiPoint, network.sourceCrs())
(line_sink, line_dest_id) = self.parameterAsSink(parameters, self.OUTPUT_LINES, context,
fields, QgsWkbTypes.MultiLineString, network.sourceCrs())
total = 100.0 / len(snappedPoints) if snappedPoints else 1
for i, p in enumerate(snappedPoints):
if feedback.isCanceled():
break
idxStart = graph.findVertex(snappedPoints[i])
#.........这里部分代码省略.........
示例4: processAlgorithm
# 需要导入模块: from qgis.core import QgsFeatureRequest [as 别名]
# 或者: from qgis.core.QgsFeatureRequest import setDestinationCrs [as 别名]
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())
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
geom = featA.geometry()
diffGeom = QgsGeometry(geom)
attrs = featA.attributes()
intersects = indexB.intersects(geom.boundingBox())
request = QgsFeatureRequest().setFilterFids(intersects).setSubsetOfAttributes([])
request.setDestinationCrs(sourceA.sourceCrs())
for featB in sourceB.getFeatures(request):
if feedback.isCanceled():
break
tmpGeom = featB.geometry()
if diffGeom.intersects(tmpGeom):
diffGeom = QgsGeometry(diffGeom.difference(tmpGeom))
try:
outFeat.setGeometry(diffGeom)
outFeat.setAttributes(attrs)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'),
self.tr('Processing'), QgsMessageLog.WARNING)
continue
count += 1
feedback.setProgress(int(count * total))
length = len(sourceA.fields())
for featA in sourceB.getFeatures(QgsFeatureRequest().setDestinationCrs(sourceA.sourceCrs())):
if feedback.isCanceled():
break
geom = featA.geometry()
diffGeom = QgsGeometry(geom)
attrs = featA.attributes()
attrs = [NULL] * length + attrs
intersects = indexA.intersects(geom.boundingBox())
request = QgsFeatureRequest().setFilterFids(intersects).setSubsetOfAttributes([])
for featB in sourceA.getFeatures(request):
if feedback.isCanceled():
break
tmpGeom = featB.geometry()
if diffGeom.intersects(tmpGeom):
diffGeom = QgsGeometry(diffGeom.difference(tmpGeom))
try:
outFeat.setGeometry(diffGeom)
outFeat.setAttributes(attrs)
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
except:
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'),
self.tr('Processing'), QgsMessageLog.WARNING)
continue
count += 1
feedback.setProgress(int(count * total))
return {self.OUTPUT: dest_id}
示例5: processAlgorithm
# 需要导入模块: from qgis.core import QgsFeatureRequest [as 别名]
# 或者: from qgis.core.QgsFeatureRequest import setDestinationCrs [as 别名]
def processAlgorithm(self, parameters, context, feedback):
network = self.parameterAsSource(parameters, self.INPUT, context)
startPoints = self.parameterAsSource(parameters, self.START_POINTS, context)
endPoint = self.parameterAsPoint(parameters, self.END_POINT, context, network.sourceCrs())
strategy = self.parameterAsEnum(parameters, self.STRATEGY, context)
directionFieldName = self.parameterAsString(parameters, self.DIRECTION_FIELD, context)
forwardValue = self.parameterAsString(parameters, self.VALUE_FORWARD, context)
backwardValue = self.parameterAsString(parameters, self.VALUE_BACKWARD, context)
bothValue = self.parameterAsString(parameters, self.VALUE_BOTH, context)
defaultDirection = self.parameterAsEnum(parameters, self.DEFAULT_DIRECTION, context)
speedFieldName = self.parameterAsString(parameters, self.SPEED_FIELD, context)
defaultSpeed = self.parameterAsDouble(parameters, self.DEFAULT_SPEED, context)
tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context)
fields = startPoints.fields()
fields.append(QgsField('start', QVariant.String, '', 254, 0))
fields.append(QgsField('end', QVariant.String, '', 254, 0))
fields.append(QgsField('cost', QVariant.Double, '', 20, 7))
feat = QgsFeature()
feat.setFields(fields)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, QgsWkbTypes.LineString, network.sourceCrs())
directionField = -1
if directionFieldName:
directionField = network.fields().lookupField(directionFieldName)
speedField = -1
if speedFieldName:
speedField = network.fields().lookupField(speedFieldName)
director = QgsVectorLayerDirector(network,
directionField,
forwardValue,
backwardValue,
bothValue,
defaultDirection)
distUnit = context.project().crs().mapUnits()
multiplier = QgsUnitTypes.fromUnitToUnitFactor(distUnit, QgsUnitTypes.DistanceMeters)
if strategy == 0:
strategy = QgsNetworkDistanceStrategy()
else:
strategy = QgsNetworkSpeedStrategy(speedField,
defaultSpeed,
multiplier * 1000.0 / 3600.0)
multiplier = 3600
director.addStrategy(strategy)
builder = QgsGraphBuilder(network.sourceCrs(),
True,
tolerance)
feedback.pushInfo(self.tr('Loading start points...'))
request = QgsFeatureRequest()
request.setDestinationCrs(network.sourceCrs())
features = startPoints.getFeatures(request)
total = 100.0 / startPoints.featureCount() if startPoints.featureCount() else 0
points = [endPoint]
source_attributes = {}
i = 1
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not f.hasGeometry():
continue
for p in f.geometry().vertices():
points.append(QgsPointXY(p))
source_attributes[i] = f.attributes()
i += 1
feedback.setProgress(int(current * total))
feedback.pushInfo(self.tr('Building graph...'))
snappedPoints = director.makeGraph(builder, points, feedback)
feedback.pushInfo(self.tr('Calculating shortest paths...'))
graph = builder.graph()
idxEnd = graph.findVertex(snappedPoints[0])
nPoints = len(snappedPoints)
total = 100.0 / nPoints if nPoints else 1
for i in range(1, nPoints):
if feedback.isCanceled():
break
idxStart = graph.findVertex(snappedPoints[i])
tree, costs = QgsGraphAnalyzer.dijkstra(graph, idxStart, 0)
if tree[idxEnd] == -1:
msg = self.tr('There is no route from start point ({}) to end point ({}).'.format(points[i].toString(), endPoint.toString()))
feedback.reportError(msg)
# add feature with no geometry
#.........这里部分代码省略.........
示例6: processAlgorithm
# 需要导入模块: from qgis.core import QgsFeatureRequest [as 别名]
# 或者: from qgis.core.QgsFeatureRequest import setDestinationCrs [as 别名]
def processAlgorithm(self, parameters, context, feedback):
network = self.parameterAsSource(parameters, self.INPUT, context)
startPoints = self.parameterAsSource(parameters, self.START_POINTS, context)
strategy = self.parameterAsEnum(parameters, self.STRATEGY, context)
travelCost = self.parameterAsDouble(parameters, self.TRAVEL_COST, context)
directionFieldName = self.parameterAsString(parameters, self.DIRECTION_FIELD, context)
forwardValue = self.parameterAsString(parameters, self.VALUE_FORWARD, context)
backwardValue = self.parameterAsString(parameters, self.VALUE_BACKWARD, context)
bothValue = self.parameterAsString(parameters, self.VALUE_BOTH, context)
defaultDirection = self.parameterAsEnum(parameters, self.DEFAULT_DIRECTION, context)
speedFieldName = self.parameterAsString(parameters, self.SPEED_FIELD, context)
defaultSpeed = self.parameterAsDouble(parameters, self.DEFAULT_SPEED, context)
tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context)
fields = startPoints.fields()
fields.append(QgsField('type', QVariant.String, '', 254, 0))
fields.append(QgsField('start', QVariant.String, '', 254, 0))
feat = QgsFeature()
feat.setFields(fields)
directionField = -1
if directionFieldName:
directionField = network.fields().lookupField(directionFieldName)
speedField = -1
if speedFieldName:
speedField = network.fields().lookupField(speedFieldName)
director = QgsVectorLayerDirector(network,
directionField,
forwardValue,
backwardValue,
bothValue,
defaultDirection)
distUnit = context.project().crs().mapUnits()
multiplier = QgsUnitTypes.fromUnitToUnitFactor(distUnit, QgsUnitTypes.DistanceMeters)
if strategy == 0:
strategy = QgsNetworkDistanceStrategy()
else:
strategy = QgsNetworkSpeedStrategy(speedField,
defaultSpeed,
multiplier * 1000.0 / 3600.0)
director.addStrategy(strategy)
builder = QgsGraphBuilder(network.sourceCrs(),
True,
tolerance)
feedback.pushInfo(self.tr('Loading start points...'))
request = QgsFeatureRequest()
request.setDestinationCrs(network.sourceCrs())
features = startPoints.getFeatures(request)
total = 100.0 / startPoints.featureCount() if startPoints.featureCount() else 0
points = []
source_attributes = {}
i = 0
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not f.hasGeometry():
continue
for p in f.geometry().vertices():
points.append(QgsPointXY(p))
source_attributes[i] = f.attributes()
i += 1
feedback.setProgress(int(current * total))
feedback.pushInfo(self.tr('Building graph...'))
snappedPoints = director.makeGraph(builder, points, feedback)
feedback.pushInfo(self.tr('Calculating service areas...'))
graph = builder.graph()
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, QgsWkbTypes.MultiPoint, network.sourceCrs())
vertices = []
upperBoundary = []
lowerBoundary = []
total = 100.0 / len(snappedPoints) if snappedPoints else 1
for i, p in enumerate(snappedPoints):
if feedback.isCanceled():
break
idxStart = graph.findVertex(snappedPoints[i])
origPoint = points[i].toString()
tree, cost = QgsGraphAnalyzer.dijkstra(graph, idxStart, 0)
for j, v in enumerate(cost):
if v > travelCost and tree[j] != -1:
vertexId = graph.edge(tree[j]).fromVertex()
if cost[vertexId] <= travelCost:
vertices.append(j)
#.........这里部分代码省略.........
示例7: processAlgorithm
# 需要导入模块: from qgis.core import QgsFeatureRequest [as 别名]
# 或者: from qgis.core.QgsFeatureRequest import setDestinationCrs [as 别名]
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 int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]:
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))
#.........这里部分代码省略.........
示例8: processAlgorithm
# 需要导入模块: from qgis.core import QgsFeatureRequest [as 别名]
# 或者: from qgis.core.QgsFeatureRequest import setDestinationCrs [as 别名]
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}
示例9: processAlgorithm
# 需要导入模块: from qgis.core import QgsFeatureRequest [as 别名]
# 或者: from qgis.core.QgsFeatureRequest import setDestinationCrs [as 别名]
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
#.........这里部分代码省略.........
示例10: processAlgorithm
# 需要导入模块: from qgis.core import QgsFeatureRequest [as 别名]
# 或者: from qgis.core.QgsFeatureRequest import setDestinationCrs [as 别名]
def processAlgorithm(self, parameters, context, feedback):
network = self.parameterAsSource(parameters, self.INPUT, context)
startPoint = self.parameterAsPoint(parameters, self.START_POINT, context, network.sourceCrs())
endPoints = self.parameterAsSource(parameters, self.END_POINTS, context)
strategy = self.parameterAsEnum(parameters, self.STRATEGY, context)
directionFieldName = self.parameterAsString(parameters, self.DIRECTION_FIELD, context)
forwardValue = self.parameterAsString(parameters, self.VALUE_FORWARD, context)
backwardValue = self.parameterAsString(parameters, self.VALUE_BACKWARD, context)
bothValue = self.parameterAsString(parameters, self.VALUE_BOTH, context)
defaultDirection = self.parameterAsEnum(parameters, self.DEFAULT_DIRECTION, context)
speedFieldName = self.parameterAsString(parameters, self.SPEED_FIELD, context)
defaultSpeed = self.parameterAsDouble(parameters, self.DEFAULT_SPEED, context)
tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context)
fields = QgsFields()
fields.append(QgsField('start', QVariant.String, '', 254, 0))
fields.append(QgsField('end', QVariant.String, '', 254, 0))
fields.append(QgsField('cost', QVariant.Double, '', 20, 7))
feat = QgsFeature()
feat.setFields(fields)
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, QgsWkbTypes.LineString, network.sourceCrs())
directionField = -1
if directionFieldName:
directionField = network.fields().lookupField(directionFieldName)
speedField = -1
if speedFieldName:
speedField = network.fields().lookupField(speedFieldName)
director = QgsVectorLayerDirector(network,
directionField,
forwardValue,
backwardValue,
bothValue,
defaultDirection)
distUnit = context.project().crs().mapUnits()
multiplier = QgsUnitTypes.fromUnitToUnitFactor(distUnit, QgsUnitTypes.DistanceMeters)
if strategy == 0:
strategy = QgsNetworkDistanceStrategy()
else:
strategy = QgsNetworkSpeedStrategy(speedField,
defaultSpeed,
multiplier * 1000.0 / 3600.0)
multiplier = 3600
director.addStrategy(strategy)
builder = QgsGraphBuilder(network.sourceCrs(),
True,
tolerance)
feedback.pushInfo(self.tr('Loading end points...'))
request = QgsFeatureRequest()
request.setFlags(request.flags() ^ QgsFeatureRequest.SubsetOfAttributes)
request.setDestinationCrs(network.sourceCrs())
features = endPoints.getFeatures(request)
total = 100.0 / endPoints.featureCount() if endPoints.featureCount() else 0
points = [startPoint]
for current, f in enumerate(features):
if feedback.isCanceled():
break
points.append(f.geometry().asPoint())
feedback.setProgress(int(current * total))
feedback.pushInfo(self.tr('Building graph...'))
snappedPoints = director.makeGraph(builder, points, feedback)
feedback.pushInfo(self.tr('Calculating shortest paths...'))
graph = builder.graph()
idxStart = graph.findVertex(snappedPoints[0])
tree, cost = QgsGraphAnalyzer.dijkstra(graph, idxStart, 0)
route = []
nPoints = len(snappedPoints)
total = 100.0 / nPoints if nPoints else 1
for i in range(1, nPoints + 1):
if feedback.isCanceled():
break
idxEnd = graph.findVertex(snappedPoints[i])
if tree[idxEnd] == -1:
msg = self.tr('There is no route from start point ({}) to end point ({}).'.format(startPoint.toString(), points[i].toString()))
feedback.setProgressText(msg)
QgsMessageLog.logMessage(msg, self.tr('Processing'), QgsMessageLog.WARNING)
continue
cost = 0.0
current = idxEnd
while current != idxStart:
cost += graph.edge(tree[current]).cost(0)
route.append(graph.vertex(graph.edge(tree[current]).inVertex()).point())
current = graph.edge(tree[current]).outVertex()
#.........这里部分代码省略.........