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132 lines
4.7 KiB
Python
132 lines
4.7 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ExportGeometryInfo.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 qgis.core import *
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from processing import interface
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.tools import dataobjects, vector
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from processing.parameters.ParameterVector import ParameterVector
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from processing.parameters.ParameterSelection import ParameterSelection
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from processing.outputs.OutputVector import OutputVector
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from processing.tools import vector as utils
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class ExportGeometryInfo(GeoAlgorithm):
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INPUT = "INPUT"
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METHOD = "CALC_METHOD"
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OUTPUT = "OUTPUT"
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CALC_METHODS = ["Layer CRS",
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"Project CRS",
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"Ellipsoidal"
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]
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#===========================================================================
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# def getIcon(self):
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# return QtGui.QIcon(os.path.dirname(__file__) + "/icons/export_geometry.png")
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#===========================================================================
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def defineCharacteristics(self):
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self.name = "Export/Add geometry columns"
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self.group = "Vector table tools"
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self.addParameter(ParameterVector(self.INPUT, "Input layer", [ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterSelection(self.METHOD, "Calculate using", self.CALC_METHODS, 0))
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self.addOutput(OutputVector(self.OUTPUT, "Output layer"))
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def processAlgorithm(self, progress):
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layer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))
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method = self.getParameterValue(self.METHOD)
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geometryType = layer.geometryType()
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idx1 = -1
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idx2 = -1
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fields = layer.pendingFields()
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if geometryType == QGis.Polygon:
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idx1, fields = utils.findOrCreateField(layer, fields, "area", 21, 6)
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idx2, fields = utils.findOrCreateField(layer, fields, "perimeter", 21, 6)
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elif geometryType == QGis.Line:
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idx1, fields = utils.findOrCreateField(layer, fields, "length", 21, 6)
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idx2 = idx1
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else:
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idx1, fields = utils.findOrCreateField(layer, fields, "xcoord", 21, 6)
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idx2, fields = utils.findOrCreateField(layer, fields, "ycoord", 21, 6)
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields.toList(),
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layer.dataProvider().geometryType(), layer.crs())
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print idx1, idx2
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ellips = None
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crs = None
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coordTransform = None
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# calculate with:
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# 0 - layer CRS
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# 1 - project CRS
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# 2 - ellipsoidal
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if method == 2:
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ellips = QgsProject.instance().readEntry("Measure", "/Ellipsoid", "NONE")[0]
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crs = layer.crs().srsid()
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elif method == 1:
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mapCRS = interface.iface.mapCanvas().mapRenderer().destinationCrs()
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layCRS = layer.crs()
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coordTransform = QgsCoordinateTransform(layCRS, mapCRS)
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outFeat = QgsFeature()
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inGeom = QgsGeometry()
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outFeat.initAttributes(len(fields))
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outFeat.setFields(fields)
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current = 0
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features = vector.features(layer)
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total = 100.0 / float(len(features))
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for f in features:
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inGeom = f.geometry()
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if method == 1:
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inGeom.transform(coordTransform)
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(attr1, attr2) = utils.simpleMeasure(inGeom, method, ellips, crs)
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outFeat.setGeometry(inGeom)
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attrs = f.attributes()
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attrs.insert(idx1, attr1)
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if attr2 is not None:
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attrs.insert(idx2, attr2)
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outFeat.setAttributes(attrs)
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writer.addFeature(outFeat)
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current += 1
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progress.setPercentage(int(current * total))
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del writer
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