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81 lines
3.2 KiB
Python
81 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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PointsLayerFromTable.py
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---------------------
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Date : January 2013
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Copyright : (C) 2013 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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from sextante.parameters.ParameterTable import ParameterTable
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from sextante.parameters.ParameterTableField import ParameterTableField
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__author__ = 'Victor Olaya'
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__date__ = 'August 2013'
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__copyright__ = '(C) 2013, 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 sextante.core.GeoAlgorithm import GeoAlgorithm
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from PyQt4.QtCore import *
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from PyQt4.QtGui import *
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from qgis.core import *
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from sextante.core.QGisLayers import QGisLayers
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from sextante.outputs.OutputVector import OutputVector
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class PointsLayerFromTable(GeoAlgorithm):
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INPUT = "INPUT"
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XFIELD = "XFIELD"
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YFIELD = "YFIELD"
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OUTPUT = "OUTPUT"
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def processAlgorithm(self, progress):
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source = self.getParameterValue(self.INPUT)
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vlayer = QGisLayers.getObjectFromUri(source)
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output = self.getOutputFromName(self.OUTPUT)
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vprovider = vlayer.dataProvider()
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fields = vprovider.fields()
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writer = output.getVectorWriter(fields, QGis.WKBPoint, self.crs)
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xfieldindex = vlayer.fieldNameIndex(self.getParameterValue(self.XFIELD))
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yfieldindex = vlayer.fieldNameIndex(self.getParameterValue(self.YFIELD))
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outFeat = QgsFeature()
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nElement = 0
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features = QGisLayers.features(vlayer)
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nFeat = len(features)
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for feature in features:
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nElement += 1
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progress.setPercentage((nElement*100)/nFeat)
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attrs = feature.attributes()
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try:
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x = float(attrs[xfieldindex].toString())
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y = float(attrs[yfieldindex].toString())
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except:
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continue
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pt = QgsPoint(x, y)
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outFeat.setGeometry(QgsGeometry.fromPoint(pt))
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outFeat.setAttributes(attrs)
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writer.addFeature(outFeat)
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del writer
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def defineCharacteristics(self):
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self.name = "Points layer from table"
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self.group = "Vector creation tools"
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self.addParameter(ParameterTable(self.INPUT, "Input layer"))
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self.addParameter(ParameterTableField(self.XFIELD, "X field", self.INPUT, ParameterTableField.DATA_TYPE_ANY))
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self.addParameter(ParameterTableField(self.YFIELD, "Y field", self.INPUT, ParameterTableField.DATA_TYPE_ANY))
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self.addOutput(OutputVector(self.OUTPUT, "Output layer"))
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