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98 lines
3.9 KiB
Python
98 lines
3.9 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ogr2ogrpointsonlines.py
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---------------------
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Date : Janaury 2015
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Copyright : (C) 2015 by Giovanni Manghi
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Email : giovanni dot manghi at naturalgis dot pt
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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__ = 'Giovanni Manghi'
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__date__ = 'January 2015'
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__copyright__ = '(C) 2015, Giovanni Manghi'
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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 processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterString
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from processing.core.parameters import ParameterNumber
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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.system import isWindows
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from processing.algs.gdal.OgrAlgorithm import OgrAlgorithm
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from processing.algs.gdal.GdalUtils import GdalUtils
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class Ogr2OgrPointsOnLines(OgrAlgorithm):
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OUTPUT_LAYER = 'OUTPUT_LAYER'
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INPUT_LAYER = 'INPUT_LAYER'
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DISTANCE = 'DISTANCE'
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GEOMETRY = 'GEOMETRY'
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OPTIONS = 'OPTIONS'
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def defineCharacteristics(self):
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self.name = 'Create points along lines'
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self.group = '[OGR] Geoprocessing'
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self.addParameter(ParameterVector(self.INPUT_LAYER, 'Input layer',
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[ParameterVector.VECTOR_TYPE_LINE], False))
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self.addParameter(ParameterString(self.GEOMETRY, 'Geometry column name ("geometry" for Shapefiles, may be different for other formats)',
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'geometry', optional=False))
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self.addParameter(ParameterNumber(self.DISTANCE, 'Distance from line start represented as fraction of line length', 0, 1, 0.5))
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self.addParameter(ParameterString(self.OPTIONS, 'Additional creation options (see ogr2ogr manual)',
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'', optional=True))
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self.addOutput(OutputVector(self.OUTPUT_LAYER, 'Output layer'))
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def processAlgorithm(self, progress):
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inLayer = self.getParameterValue(self.INPUT_LAYER)
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ogrLayer = self.ogrConnectionString(inLayer)[1:-1]
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layername = "'" + self.ogrLayerName(inLayer) + "'"
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distance = unicode(self.getParameterValue(self.DISTANCE))
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geometry = unicode(self.getParameterValue(self.GEOMETRY))
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output = self.getOutputFromName(self.OUTPUT_LAYER)
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outFile = output.value
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output = self.ogrConnectionString(outFile)
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options = unicode(self.getParameterValue(self.OPTIONS))
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arguments = []
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arguments.append(output)
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arguments.append(ogrLayer)
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arguments.append(self.ogrLayerName(inLayer))
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arguments.append('-dialect sqlite -sql "SELECT ST_Line_Interpolate_Point(')
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arguments.append(geometry)
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arguments.append(',')
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arguments.append(distance)
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arguments.append('),*')
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arguments.append('FROM')
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arguments.append(layername)
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arguments.append('"')
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if len(options) > 0:
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arguments.append(options)
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commands = []
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if isWindows():
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commands = ['cmd.exe', '/C ', 'ogr2ogr.exe',
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GdalUtils.escapeAndJoin(arguments)]
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else:
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commands = ['ogr2ogr', GdalUtils.escapeAndJoin(arguments)]
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GdalUtils.runGdal(commands, progress)
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