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89 lines
3.2 KiB
Python
89 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ClipByExtent.py
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---------------------
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Date : September 2013
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Copyright : (C) 2013 by Alexander Bruy
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Email : alexander bruy 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__ = 'Alexander Bruy'
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__date__ = 'September 2013'
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__copyright__ = '(C) 2013, Alexander Bruy'
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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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import os
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from PyQt4 import QtGui
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from qgis.core import *
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from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
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from processing.core.parameters import ParameterRaster
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from processing.core.parameters import ParameterExtent
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from processing.core.parameters import ParameterString
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from processing.core.outputs import OutputRaster
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from processing.algs.gdal.GdalUtils import GdalUtils
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class ClipByExtent(GdalAlgorithm):
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INPUT = 'INPUT'
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OUTPUT = 'OUTPUT'
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NO_DATA = 'NO_DATA'
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PROJWIN = 'PROJWIN'
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EXTRA = 'EXTRA'
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def defineCharacteristics(self):
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self.name = 'Clip raster by extent'
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self.group = '[GDAL] Extraction'
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self.addParameter(ParameterRaster(self.INPUT, 'Input layer', False))
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self.addParameter(ParameterString(self.NO_DATA,
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'Nodata value, leave as none to take the nodata value from input',
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'none'))
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self.addParameter(ParameterExtent(self.PROJWIN, 'Clipping extent'))
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self.addParameter(ParameterString(self.EXTRA,
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'Additional creation parameters', '', optional=True))
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self.addOutput(OutputRaster(self.OUTPUT, 'Output layer'))
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def processAlgorithm(self, progress):
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out = self.getOutputValue(self.OUTPUT)
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noData = str(self.getParameterValue(self.NO_DATA))
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projwin = str(self.getParameterValue(self.PROJWIN))
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extra = str(self.getParameterValue(self.EXTRA))
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arguments = []
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arguments.append('-of')
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arguments.append(GdalUtils.getFormatShortNameFromFilename(out))
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arguments.append('-a_nodata')
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arguments.append(noData)
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regionCoords = projwin.split(',')
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arguments.append('-projwin')
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arguments.append(regionCoords[0])
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arguments.append(regionCoords[3])
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arguments.append(regionCoords[1])
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arguments.append(regionCoords[2])
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if len(extra) > 0:
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arguments.append(extra)
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arguments.append(self.getParameterValue(self.INPUT))
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arguments.append(out)
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GdalUtils.runGdal(['gdal_translate',
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GdalUtils.escapeAndJoin(arguments)], progress)
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