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applied patch for multiple grass sessions added points in polygon weighted
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131 changes: 131 additions & 0 deletions
131
python/plugins/sextante/ftools/PointsInPolygonWeighted.py
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# -*- coding: utf-8 -*- | ||
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""" | ||
*************************************************************************** | ||
PointsInPolygon.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.parameters.ParameterTableField import ParameterTableField | ||
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__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__ = '$Format:%H$' | ||
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import os.path | ||
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from PyQt4 import QtGui | ||
from PyQt4.QtCore import * | ||
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from qgis.core import * | ||
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from sextante.core.GeoAlgorithm import GeoAlgorithm | ||
from sextante.core.QGisLayers import QGisLayers | ||
from sextante.core.SextanteLog import SextanteLog | ||
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from sextante.parameters.ParameterVector import ParameterVector | ||
from sextante.parameters.ParameterString import ParameterString | ||
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from sextante.outputs.OutputVector import OutputVector | ||
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from sextante.ftools import FToolsUtils as utils | ||
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class PointsInPolygonWeighted(GeoAlgorithm): | ||
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POLYGONS = "POLYGONS" | ||
POINTS = "POINTS" | ||
OUTPUT = "OUTPUT" | ||
FIELD = "FIELD" | ||
WEIGHT = "WEIGHT" | ||
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def getIcon(self): | ||
return QtGui.QIcon(os.path.dirname(__file__) + "/icons/sum_points.png") | ||
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def defineCharacteristics(self): | ||
self.name = "Count points in polygon(weighted)" | ||
self.group = "Analysis tools" | ||
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self.addParameter(ParameterVector(self.POLYGONS, "Polygons", ParameterVector.VECTOR_TYPE_POLYGON)) | ||
self.addParameter(ParameterVector(self.POINTS, "Points", ParameterVector.VECTOR_TYPE_POINT)) | ||
self.addParameter(ParameterTableField(self.WEIGHT, "Weight field", self.POINTS)) | ||
self.addParameter(ParameterString(self.FIELD, "Count field name", "NUMPOINTS")) | ||
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self.addOutput(OutputVector(self.OUTPUT, "Result")) | ||
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def processAlgorithm(self, progress): | ||
polyLayer = QGisLayers.getObjectFromUri(self.getParameterValue(self.POLYGONS)) | ||
pointLayer = QGisLayers.getObjectFromUri(self.getParameterValue(self.POINTS)) | ||
fieldName = self.getParameterValue(self.FIELD) | ||
fieldidx = pointLayer.dataProvider().fieldNameIndex(self.getParameterValue(self.WEIGHT)) | ||
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polyProvider = polyLayer.dataProvider() | ||
pointProvider = pointLayer.dataProvider() | ||
if polyProvider.crs() != pointProvider.crs(): | ||
SextanteLog.addToLog(SextanteLog.LOG_WARNING, | ||
"CRS warning: Input layers have non-matching CRS. This may cause unexpected results.") | ||
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idxCount, fieldList = utils.findOrCreateField(polyLayer, polyLayer.pendingFields(), fieldName) | ||
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fieldList, | ||
polyProvider.geometryType(), polyProvider.crs()) | ||
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spatialIndex = utils.createSpatialIndex(pointProvider) | ||
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pointProvider.rewind() | ||
pointProvider.select() | ||
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allAttrs = polyLayer.pendingAllAttributesList() | ||
polyLayer.select(allAttrs) | ||
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ftPoly = QgsFeature() | ||
ftPoint = QgsFeature() | ||
outFeat = QgsFeature() | ||
geom = QgsGeometry() | ||
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current = 0 | ||
total = 100.0 / float(polyProvider.featureCount()) | ||
hasIntersections = False | ||
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while polyLayer.nextFeature(ftPoly): | ||
geom = ftPoly.geometry() | ||
atMap = ftPoly.attributeMap() | ||
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count = 0 | ||
hasIntersections = False | ||
points = spatialIndex.intersects(geom.boundingBox()) | ||
if len(points) > 0: | ||
hasIntersections = True | ||
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if hasIntersections: | ||
for i in points: | ||
pointLayer.featureAtId(int(i), ftPoint, True, False) | ||
tmpGeom = QgsGeometry(ftPoint.geometry()) | ||
if geom.contains(tmpGeom): | ||
try: | ||
weight = float(ftPoint.attributeMap()[fieldidx]) | ||
except: | ||
weight = 1 | ||
count += weight | ||
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outFeat.setGeometry(geom) | ||
outFeat.setAttributeMap(atMap) | ||
outFeat.addAttribute(idxCount, QVariant(count)) | ||
writer.addFeature(outFeat) | ||
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current += 1 | ||
progress.setPercentage(int(current * total)) | ||
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del writer |
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