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87 lines
3.3 KiB
Python
87 lines
3.3 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.core.GeoAlgorithm import GeoAlgorithm
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from processing.parameters.ParameterRaster import ParameterRaster
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from processing.parameters.ParameterExtent import ParameterExtent
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from processing.parameters.ParameterString import ParameterString
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from processing.outputs.OutputRaster import OutputRaster
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from processing.gdal.GdalUtils import GdalUtils
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class ClipByExtent(GeoAlgorithm):
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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 getIcon(self):
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filepath = os.path.dirname(__file__) + "/icons/raster-clip.png"
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return QtGui.QIcon(filepath)
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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, "Nodata value, leave as none to take the nodata value from input", "none"))
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self.addParameter(ParameterExtent(self.PROJWIN, "Clipping extent"))
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self.addParameter(ParameterString(self.EXTRA, "Additional creation parameters", ""))
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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", GdalUtils.escapeAndJoin(arguments)], progress)
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