# -*- coding: utf-8 -*- """ *************************************************************************** Union.py --------------------- Date : August 2012 Copyright : (C) 2012 by Victor Olaya Email : volayaf at gmail dot com *************************************************************************** * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * * * *************************************************************************** """ __author__ = 'Victor Olaya' __date__ = 'August 2012' __copyright__ = '(C) 2012, Victor Olaya' # This will get replaced with a git SHA1 when you do a git archive __revision__ = '$Format:%H$' import os from qgis.PyQt.QtGui import QIcon from qgis.core import (QgsFeatureRequest, QgsFeature, QgsGeometry, QgsWkbTypes, QgsMessageLog, QgsProcessingUtils) from processing.algs.qgis import QgisAlgorithm from processing.core.parameters import ParameterVector from processing.core.outputs import OutputVector from processing.tools import vector pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0] wkbTypeGroups = { 'Point': (QgsWkbTypes.Point, QgsWkbTypes.MultiPoint, QgsWkbTypes.Point25D, QgsWkbTypes.MultiPoint25D,), 'LineString': (QgsWkbTypes.LineString, QgsWkbTypes.MultiLineString, QgsWkbTypes.LineString25D, QgsWkbTypes.MultiLineString25D,), 'Polygon': (QgsWkbTypes.Polygon, QgsWkbTypes.MultiPolygon, QgsWkbTypes.Polygon25D, QgsWkbTypes.MultiPolygon25D,), } for key, value in list(wkbTypeGroups.items()): for const in value: wkbTypeGroups[const] = key class Union(QgisAlgorithm): INPUT = 'INPUT' INPUT2 = 'INPUT2' OUTPUT = 'OUTPUT' def icon(self): return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'union.png')) def group(self): return self.tr('Vector overlay tools') def __init__(self): super().__init__() self.addParameter(ParameterVector(Union.INPUT, self.tr('Input layer'))) self.addParameter(ParameterVector(Union.INPUT2, self.tr('Input layer 2'))) self.addOutput(OutputVector(Union.OUTPUT, self.tr('Union'))) def name(self): return 'union' def displayName(self): return self.tr('Union') def processAlgorithm(self, parameters, context, feedback): vlayerA = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(Union.INPUT), context) vlayerB = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(Union.INPUT2), context) geomType = vlayerA.wkbType() fields = vector.combineVectorFields(vlayerA, vlayerB) writer = self.getOutputFromName(Union.OUTPUT).getVectorWriter(fields, geomType, vlayerA.crs(), context) inFeatA = QgsFeature() inFeatB = QgsFeature() outFeat = QgsFeature() indexA = QgsProcessingUtils.createSpatialIndex(vlayerB, context) indexB = QgsProcessingUtils.createSpatialIndex(vlayerA, context) count = 0 nElement = 0 featuresA = QgsProcessingUtils.getFeatures(vlayerA, context) nFeat = QgsProcessingUtils.featureCount(vlayerA, context) for inFeatA in featuresA: feedback.setProgress(nElement / float(nFeat) * 50) nElement += 1 lstIntersectingB = [] geom = inFeatA.geometry() atMapA = inFeatA.attributes() intersects = indexA.intersects(geom.boundingBox()) if len(intersects) < 1: try: outFeat.setGeometry(geom) outFeat.setAttributes(atMapA) writer.addFeature(outFeat) except: # This really shouldn't happen, as we haven't # edited the input geom at all QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'), self.tr('Processing'), QgsMessageLog.INFO) else: request = QgsFeatureRequest().setFilterFids(intersects) engine = QgsGeometry.createGeometryEngine(geom.geometry()) engine.prepareGeometry() for inFeatB in vlayerB.getFeatures(request): count += 1 atMapB = inFeatB.attributes() tmpGeom = inFeatB.geometry() if engine.intersects(tmpGeom.geometry()): int_geom = geom.intersection(tmpGeom) lstIntersectingB.append(tmpGeom) if not int_geom: # There was a problem creating the intersection QgsMessageLog.logMessage(self.tr('GEOS geoprocessing error: One or more input features have invalid geometry.'), self.tr('Processing'), QgsMessageLog.INFO) int_geom = QgsGeometry() else: int_geom = QgsGeometry(int_geom) if int_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(int_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection: # Intersection produced different geomety types temp_list = int_geom.asGeometryCollection() for i in temp_list: if i.type() == geom.type(): int_geom = QgsGeometry(i) try: outFeat.setGeometry(int_geom) outFeat.setAttributes(atMapA + atMapB) writer.addFeature(outFeat) except: QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'), self.tr('Processing'), QgsMessageLog.INFO) else: # Geometry list: prevents writing error # in geometries of different types # produced by the intersection # fix #3549 if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]: try: outFeat.setGeometry(int_geom) outFeat.setAttributes(atMapA + atMapB) writer.addFeature(outFeat) except: QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'), self.tr('Processing'), QgsMessageLog.INFO) # the remaining bit of inFeatA's geometry # if there is nothing left, this will just silently fail and we're good diff_geom = QgsGeometry(geom) if len(lstIntersectingB) != 0: intB = QgsGeometry.unaryUnion(lstIntersectingB) diff_geom = diff_geom.difference(intB) if diff_geom.wkbType() == 0 or QgsWkbTypes.flatType(diff_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection: temp_list = diff_geom.asGeometryCollection() for i in temp_list: if i.type() == geom.type(): diff_geom = QgsGeometry(i) try: outFeat.setGeometry(diff_geom) outFeat.setAttributes(atMapA) writer.addFeature(outFeat) except: QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'), self.tr('Processing'), QgsMessageLog.INFO) length = len(vlayerA.fields()) atMapA = [None] * length featuresA = QgsProcessingUtils.getFeatures(vlayerB, context) nFeat = QgsProcessingUtils.featureCount(vlayerB, context) for inFeatA in featuresA: feedback.setProgress(nElement / float(nFeat) * 100) add = False geom = inFeatA.geometry() diff_geom = QgsGeometry(geom) atMap = [None] * length atMap.extend(inFeatA.attributes()) intersects = indexB.intersects(geom.boundingBox()) if len(intersects) < 1: try: outFeat.setGeometry(geom) outFeat.setAttributes(atMap) writer.addFeature(outFeat) except: QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'), self.tr('Processing'), QgsMessageLog.INFO) else: request = QgsFeatureRequest().setFilterFids(intersects) # use prepared geometries for faster intersection tests engine = QgsGeometry.createGeometryEngine(diff_geom.geometry()) engine.prepareGeometry() for inFeatB in vlayerA.getFeatures(request): atMapB = inFeatB.attributes() tmpGeom = inFeatB.geometry() if engine.intersects(tmpGeom.geometry()): add = True diff_geom = QgsGeometry(diff_geom.difference(tmpGeom)) else: try: # Ihis only happens if the bounding box # intersects, but the geometry doesn't outFeat.setGeometry(diff_geom) outFeat.setAttributes(atMap) 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.INFO) if add: try: outFeat.setGeometry(diff_geom) outFeat.setAttributes(atMap) 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.INFO) nElement += 1 del writer