# -*- 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 Qgis, QgsFeatureRequest, QgsFeature, QgsGeometry, QgsWkbTypes, QgsWkbTypes from processing.core.GeoAlgorithm import GeoAlgorithm from processing.core.ProcessingLog import ProcessingLog from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException from processing.core.parameters import ParameterVector from processing.core.outputs import OutputVector from processing.tools import dataobjects, 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(GeoAlgorithm): INPUT = 'INPUT' INPUT2 = 'INPUT2' OUTPUT = 'OUTPUT' def getIcon(self): return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'union.png')) def defineCharacteristics(self): self.name, self.i18n_name = self.trAlgorithm('Union') self.group, self.i18n_group = self.trAlgorithm('Vector overlay tools') 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 processAlgorithm(self, progress): vlayerA = dataobjects.getObjectFromUri(self.getParameterValue(Union.INPUT)) vlayerB = dataobjects.getObjectFromUri(self.getParameterValue(Union.INPUT2)) geomType = vlayerA.wkbType() fields = vector.combineVectorFields(vlayerA, vlayerB) writer = self.getOutputFromName(Union.OUTPUT).getVectorWriter(fields, geomType, vlayerA.crs()) inFeatA = QgsFeature() inFeatB = QgsFeature() outFeat = QgsFeature() indexA = vector.spatialindex(vlayerB) indexB = vector.spatialindex(vlayerA) count = 0 nElement = 0 featuresA = vector.features(vlayerA) nFeat = len(featuresA) for inFeatA in featuresA: progress.setPercentage(nElement / float(nFeat) * 50) nElement += 1 lstIntersectingB = [] geom = inFeatA.geometry() atMapA = inFeatA.attributes() intersects = indexA.intersects(geom.boundingBox()) if len(intersects) < 1: try: outFeat.setGeometry(geom) outFeat.setAttributes(atMapA) writer.addFeature(outFeat) except: # This really shouldn't happen, as we haven't # edited the input geom at all ProcessingLog.addToLog(ProcessingLog.LOG_INFO, self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.')) else: for id in intersects: count += 1 request = QgsFeatureRequest().setFilterFid(id) inFeatB = next(vlayerB.getFeatures(request)) atMapB = inFeatB.attributes() tmpGeom = inFeatB.geometry() if geom.intersects(tmpGeom): int_geom = geom.intersection(tmpGeom) lstIntersectingB.append(tmpGeom) if not int_geom: # There was a problem creating the intersection ProcessingLog.addToLog(ProcessingLog.LOG_INFO, self.tr('GEOS geoprocessing error: One or more input features have invalid geometry.')) int_geom = QgsGeometry() else: int_geom = QgsGeometry(int_geom) if int_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(int_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection: # Intersection produced different geomety types temp_list = int_geom.asGeometryCollection() for i in temp_list: if i.type() == geom.type(): int_geom = QgsGeometry(i) try: outFeat.setGeometry(int_geom) outFeat.setAttributes(atMapA + atMapB) writer.addFeature(outFeat) except: ProcessingLog.addToLog(ProcessingLog.LOG_INFO, self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.')) else: # Geometry list: prevents writing error # in geometries of different types # produced by the intersection # fix #3549 if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]: try: outFeat.setGeometry(int_geom) outFeat.setAttributes(atMapA + atMapB) writer.addFeature(outFeat) except: ProcessingLog.addToLog(ProcessingLog.LOG_INFO, self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.')) # the remaining bit of inFeatA's geometry # if there is nothing left, this will just silently fail and we're good diff_geom = QgsGeometry(geom) if len(lstIntersectingB) != 0: intB = QgsGeometry.unaryUnion(lstIntersectingB) diff_geom = diff_geom.difference(intB) if diff_geom.isGeosEmpty() or not diff_geom.isGeosValid(): ProcessingLog.addToLog(ProcessingLog.LOG_ERROR, self.tr('GEOS geoprocessing error: One or more input features have invalid geometry.')) if diff_geom.wkbType() == 0 or QgsWkbTypes.flatType(diff_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection: temp_list = diff_geom.asGeometryCollection() for i in temp_list: if i.type() == geom.type(): diff_geom = QgsGeometry(i) try: outFeat.setGeometry(diff_geom) outFeat.setAttributes(atMapA) writer.addFeature(outFeat) except: ProcessingLog.addToLog(ProcessingLog.LOG_INFO, self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.')) length = len(vlayerA.fields()) atMapA = [None] * length featuresA = vector.features(vlayerB) nFeat = len(featuresA) for inFeatA in featuresA: progress.setPercentage(nElement / float(nFeat) * 100) add = False geom = inFeatA.geometry() diff_geom = QgsGeometry(geom) atMap = [None] * length atMap.extend(inFeatA.attributes()) intersects = indexB.intersects(geom.boundingBox()) if len(intersects) < 1: try: outFeat.setGeometry(geom) outFeat.setAttributes(atMap) writer.addFeature(outFeat) except: ProcessingLog.addToLog(ProcessingLog.LOG_INFO, self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.')) else: for id in intersects: request = QgsFeatureRequest().setFilterFid(id) inFeatB = next(vlayerA.getFeatures(request)) atMapB = inFeatB.attributes() tmpGeom = inFeatB.geometry() if diff_geom.intersects(tmpGeom): add = True diff_geom = QgsGeometry(diff_geom.difference(tmpGeom)) if diff_geom.isGeosEmpty() or not diff_geom.isGeosValid(): ProcessingLog.addToLog(ProcessingLog.LOG_ERROR, self.tr('GEOS geoprocessing error: One or more input features have invalid geometry.')) else: try: # Ihis only happends if the bounding box # intersects, but the geometry doesn't outFeat.setGeometry(diff_geom) outFeat.setAttributes(atMap) writer.addFeature(outFeat) except: ProcessingLog.addToLog(ProcessingLog.LOG_INFO, self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.')) if add: try: outFeat.setGeometry(diff_geom) outFeat.setAttributes(atMap) writer.addFeature(outFeat) except: ProcessingLog.addToLog(ProcessingLog.LOG_INFO, self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.')) nElement += 1 del writer