mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-04 00:30:59 -05:00
96 lines
4.2 KiB
Python
96 lines
4.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
Intersection.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. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
from sextante.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
|
|
__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__ = '$Format:%H$'
|
|
|
|
from sextante.core.GeoAlgorithm import GeoAlgorithm
|
|
from PyQt4.QtCore import *
|
|
from PyQt4.QtGui import *
|
|
from qgis.core import *
|
|
from sextante.parameters.ParameterVector import ParameterVector
|
|
from sextante.core.QGisLayers import QGisLayers
|
|
from sextante.outputs.OutputVector import OutputVector
|
|
from sextante.algs.ftools import FToolsUtils as utils
|
|
from sextante.core.SextanteLog import SextanteLog
|
|
|
|
class Intersection(GeoAlgorithm):
|
|
|
|
INPUT = "INPUT"
|
|
INPUT2 = "INPUT2"
|
|
OUTPUT = "OUTPUT"
|
|
|
|
#===========================================================================
|
|
# def getIcon(self):
|
|
# return QtGui.QIcon(os.path.dirname(__file__) + "/icons/intersect.png")
|
|
#===========================================================================
|
|
|
|
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 defineCharacteristics(self):
|
|
self.name = "Intersection"
|
|
self.group = "Vector overlay tools"
|
|
self.addParameter(ParameterVector(Intersection.INPUT, "Input layer", ParameterVector.VECTOR_TYPE_ANY))
|
|
self.addParameter(ParameterVector(Intersection.INPUT2, "Intersect layer", ParameterVector.VECTOR_TYPE_ANY))
|
|
self.addOutput(OutputVector(Intersection.OUTPUT, "Intersection"))
|