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pep8 --ignore=E111,E128,E201,E202,E203,E211,E221,E222,E225,E226,E227,E231,E241,E261,E265,E272,E302,E303,E501,E701 \
--exclude="ui_*.py,debian/*,python/ext-libs/*" \
.
139 lines
5.5 KiB
Python
139 lines
5.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ExtractByLocation.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 qgis.core import QGis, QgsFeatureRequest, QgsGeometry
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterBoolean
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from processing.core.outputs import OutputVector
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from processing.tools import dataobjects, vector
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class ExtractByLocation(GeoAlgorithm):
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INPUT = 'INPUT'
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INTERSECT = 'INTERSECT'
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TOUCHES = 'TOUCHES'
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OVERLAPS = 'OVERLAPS'
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WITHIN = 'WITHIN'
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OUTPUT = 'OUTPUT'
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METHODS = ['creating new selection', 'adding to current selection',
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'removing from current selection']
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opFlags = 0
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operators = {'TOUCHES':1,'OVERLAPS':2,'WITHIN':4}
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def defineCharacteristics(self):
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self.name = 'Extract by location'
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self.group = 'Vector selection tools'
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self.addParameter(ParameterVector(self.INPUT,
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self.tr('Layer to select from'), [ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterVector(self.INTERSECT,
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self.tr('Additional layer (intersection layer)'),
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[ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterBoolean(
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self.TOUCHES,
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self.tr('Include input features that touch the selection features'),
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[True]))
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self.addParameter(ParameterBoolean(
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self.OVERLAPS,
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self.tr('Include input features that overlap/cross the selection features'),
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[True]))
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self.addParameter(ParameterBoolean(
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self.WITHIN,
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self.tr('Include input features completely within the selection features'),
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[True]))
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self.addOutput(OutputVector(self.OUTPUT, self.tr('Selection')))
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def processAlgorithm(self, progress):
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filename = self.getParameterValue(self.INPUT)
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layer = dataobjects.getObjectFromUri(filename)
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filename = self.getParameterValue(self.INTERSECT)
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selectLayer = dataobjects.getObjectFromUri(filename)
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index = vector.spatialindex(layer)
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def _points_op(geomA,geomB):
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return geomA.intersects(geomB)
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def _poly_lines_op(geomA,geomB):
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if geomA.disjoint(geomB):
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return False
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intersects = False
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if self.opFlags & self.operators['TOUCHES']:
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intersects |= geomA.touches(geomB)
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if not intersects and (self.opFlags & self.operators['OVERLAPS']):
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if geomB.type() == QGis.Line or geomA.type() == QGis.Line:
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intersects |= geomA.crosses(geomB)
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else:
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intersects |= geomA.overlaps(geomB)
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if not intersects and (self.opFlags & self.operators['WITHIN']):
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intersects |= geomA.contains(geomB)
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return intersects
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def _sp_operator():
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if layer.geometryType() == QGis.Point:
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return _points_op
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else:
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return _poly_lines_op
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self.opFlags = 0
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if self.getParameterValue(self.TOUCHES):
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self.opFlags |= self.operators['TOUCHES']
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if self.getParameterValue(self.OVERLAPS):
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self.opFlags |= self.operators['OVERLAPS']
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if self.getParameterValue(self.WITHIN):
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self.opFlags |= self.operators['WITHIN']
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sp_operator = _sp_operator()
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output = self.getOutputFromName(self.OUTPUT)
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writer = output.getVectorWriter(layer.pendingFields(),
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layer.dataProvider().geometryType(), layer.crs())
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geom = QgsGeometry()
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selectedSet = []
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current = 0
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features = vector.features(selectLayer)
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featureCount = len(features)
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total = 100.0 / float(len(features))
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for current,f in enumerate(features):
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geom = QgsGeometry(f.geometry())
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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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feat = layer.getFeatures(request).next()
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tmpGeom = QgsGeometry(feat.geometry())
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if sp_operator(geom,tmpGeom):
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selectedSet.append(feat.id())
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progress.setPercentage(int(current * total))
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for i, f in enumerate(vector.features(layer)):
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if f.id() in selectedSet:
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writer.addFeature(f)
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progress.setPercentage(100 * i / float(featureCount))
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del writer
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