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95 lines
3.8 KiB
Python
95 lines
3.8 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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Intersection.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from PyQt4.QtCore import *
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from PyQt4.QtGui import *
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from qgis.core import *
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.parameters.ParameterVector import ParameterVector
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from processing.outputs.OutputVector import OutputVector
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from processing.tools import dataobjects, vector
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class Intersection(GeoAlgorithm):
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INPUT = 'INPUT'
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INPUT2 = 'INPUT2'
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OUTPUT = 'OUTPUT'
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def processAlgorithm(self, progress):
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vlayerA = dataobjects.getObjectFromUri(
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self.getParameterValue(self.INPUT))
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vlayerB = dataobjects.getObjectFromUri(
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self.getParameterValue(self.INPUT2))
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vproviderA = vlayerA.dataProvider()
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fields = vector.combineVectorFields(vlayerA, vlayerB)
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields,
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vproviderA.geometryType(), vproviderA.crs())
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inFeatA = QgsFeature()
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inFeatB = QgsFeature()
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outFeat = QgsFeature()
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index = vector.spatialindex(vlayerB)
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nElement = 0
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selectionA = vector.features(vlayerA)
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nFeat = len(selectionA)
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for inFeatA in selectionA:
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nElement += 1
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progress.setPercentage(nElement / float(nFeat) * 100)
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geom = QgsGeometry(inFeatA.geometry())
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atMapA = inFeatA.attributes()
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intersects = index.intersects(geom.boundingBox())
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for i in intersects:
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request = QgsFeatureRequest().setFilterFid(i)
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inFeatB = vlayerB.getFeatures(request).next()
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tmpGeom = QgsGeometry(inFeatB.geometry())
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if geom.intersects(tmpGeom):
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atMapB = inFeatB.attributes()
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int_geom = QgsGeometry(geom.intersection(tmpGeom))
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if int_geom.wkbType() == 7:
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int_com = geom.combine(tmpGeom)
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int_sym = geom.symDifference(tmpGeom)
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int_geom = QgsGeometry(int_com.difference(int_sym))
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outFeat.setGeometry(int_geom)
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attrs = []
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attrs.extend(atMapA)
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attrs.extend(atMapB)
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outFeat.setAttributes(attrs)
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writer.addFeature(outFeat)
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del writer
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def defineCharacteristics(self):
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self.name = 'Intersection'
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self.group = 'Vector overlay tools'
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self.addParameter(ParameterVector(self.INPUT, 'Input layer',
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[ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterVector(self.INPUT2,
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'Intersect layer',
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[ParameterVector.VECTOR_TYPE_ANY]))
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self.addOutput(OutputVector(self.OUTPUT, 'Intersection'))
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