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| Original file line number | Diff line number | Diff line change |
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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 PointsInPolygonUnique(GeoAlgorithm): | ||
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| POLYGONS = "POLYGONS" | ||
| POINTS = "POINTS" | ||
| OUTPUT = "OUTPUT" | ||
| FIELD = "FIELD" | ||
| CLASSFIELD = "CLASSFIELD" | ||
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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 unique points in polygon" | ||
| self.group = "Analysis tools" | ||
| self.addParameter(ParameterVector(self.POLYGONS, "Polygons", ParameterVector.VECTOR_TYPE_POLYGON)) | ||
| self.addParameter(ParameterVector(self.POINTS, "Points", ParameterVector.VECTOR_TYPE_POINT)) | ||
| self.addParameter(ParameterTableField(self.CLASSFIELD, "Class field", self.POINTS)) | ||
| self.addParameter(ParameterString(self.FIELD, "Count field name", "NUMPOINTS")) | ||
| 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) | ||
| classFieldName = self.getParameterValue(self.CLASSFIELD) | ||
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| output = self.getOutputValue(self.OUTPUT) | ||
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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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| classFieldIndex = pointProvider.fieldNameIndex(classFieldName) | ||
| 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 = float(polyProvider.featureCount()) | ||
| hasIntersections = False | ||
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| while polyLayer.nextFeature(ftPoly): | ||
| geom = ftPoly.geometry() | ||
| atMap = ftPoly.attributeMap() | ||
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| classes = [] | ||
| 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, True) | ||
| tmpGeom = QgsGeometry(ftPoint.geometry()) | ||
| if geom.contains(tmpGeom): | ||
| clazz = ftPoint.attributeMap()[classFieldIndex].toString() | ||
| if not clazz in classes: | ||
| classes.append(clazz) | ||
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| outFeat.setGeometry(geom) | ||
| outFeat.setAttributeMap(atMap) | ||
| outFeat.addAttribute(idxCount, QVariant(len(classes))) | ||
| writer.addFeature(outFeat) | ||
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| current += 1 | ||
| progress.setPercentage(current / total) | ||
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| del writer |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| #Definition of inputs and outputs | ||
| #================================== | ||
| ##input=vector | ||
| ##class_field=field input | ||
| ##value_field=field input | ||
| ##output=output vector | ||
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| #Algorithm body | ||
| #================================== | ||
| from sextante.core.QGisLayers import QGisLayers | ||
| from qgis.core import * | ||
| from PyQt4.QtCore import * | ||
| from sextante.core.SextanteVectorWriter import SextanteVectorWriter | ||
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| # "input" contains the location of the selected layer. | ||
| # We get the actual object, so we can get its bounds | ||
| layer = QGisLayers.getObjectFromUri(input) | ||
| provider = layer.dataProvider() | ||
| allAttrs = provider.attributeIndexes() | ||
| provider.select( allAttrs ) | ||
| fields = provider.fields() | ||
| fields[len(fields)] = QgsField("UNIQ_COUNT", QVariant.Int) | ||
| writer = SextanteVectorWriter(output, None, fields, provider.geometryType(), provider.crs() ) | ||
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| # Fields are defined by their names, but QGIS needs the index for the attributes map | ||
| class_field_index = provider.fieldNameIndex(class_field) | ||
| value_field_index = provider.fieldNameIndex(value_field) | ||
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| inFeat = QgsFeature() | ||
| outFeat = QgsFeature() | ||
| inGeom = QgsGeometry() | ||
| nFeat = provider.featureCount() | ||
| nElement = 0 | ||
| classes = {} | ||
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| #Iterate over input layer to count unique values in each class | ||
| while provider.nextFeature(inFeat): | ||
| #Printing a number to the console to indicate progress | ||
| print int((50 * nElement)/nFeat) | ||
| nElement += 1 | ||
| atMap = inFeat.attributeMap() | ||
| clazz = atMap[class_field_index].toString() | ||
| value = atMap[value_field_index].toString() | ||
| if clazz not in classes: | ||
| classes[clazz] = [] | ||
| if value not in classes[clazz]: | ||
| classes[clazz].append(value) | ||
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| # Create output vector layer with additional attribute | ||
| while provider.nextFeature(inFeat): | ||
| print int((500 * nElement)/nFeat) | ||
| nElement += 1 | ||
| inGeom = inFeat.geometry() | ||
| outFeat.setGeometry( inGeom ) | ||
| atMap = inFeat.attributeMap() | ||
| clazz = atMap[class_field_index].toString() | ||
| outFeat.setAttributeMap( atMap ) | ||
| outFeat.addAttribute( len(provider.fields()), QVariant(len(classes[clazz]))) | ||
| writer.addFeature( outFeat ) | ||
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| del writer |