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[processing] add Clip raster by extent algorithm (fix #8602)
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# -*- coding: utf-8 -*- | ||
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""" | ||
*************************************************************************** | ||
ClipByExtent.py | ||
--------------------- | ||
Date : September 2013 | ||
Copyright : (C) 2012 by Alexander Bruy | ||
Email : alexander bruy at gmail dot com | ||
*************************************************************************** | ||
* * | ||
* This program is free software; you can redistribute it and/or modify * | ||
* it under the terms of the GNU General Public License as published by * | ||
* the Free Software Foundation; either version 2 of the License, or * | ||
* (at your option) any later version. * | ||
* * | ||
*************************************************************************** | ||
""" | ||
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__author__ = 'Alexander Bruy' | ||
__date__ = 'September 2013' | ||
__copyright__ = '(C) 2013, Alexander Bruy' | ||
# This will get replaced with a git SHA1 when you do a git archive | ||
__revision__ = '$Format:%H$' | ||
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import os | ||
from PyQt4 import QtGui | ||
from qgis.core import * | ||
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from processing.core.GeoAlgorithm import GeoAlgorithm | ||
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from processing.parameters.ParameterRaster import ParameterRaster | ||
from processing.parameters.ParameterExtent import ParameterExtent | ||
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" | ||
OUTPUT = "OUTPUT" | ||
NO_DATA = "NO_DATA" | ||
PROJWIN = "PROJWIN" | ||
EXTRA = "EXTRA" | ||
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def getIcon(self): | ||
filepath = os.path.dirname(__file__) + "/icons/raster-clip.png" | ||
return QtGui.QIcon(filepath) | ||
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def defineCharacteristics(self): | ||
self.name = "Clip raster by extent" | ||
self.group = "[GDAL] Extraction" | ||
self.addParameter(ParameterRaster(self.INPUT, "Input layer", False)) | ||
self.addParameter(ParameterString(self.NO_DATA, "Nodata value, leave as none to take the nodata value from input", "none")) | ||
self.addParameter(ParameterExtent(self.PROJWIN, "Clipping extent")) | ||
self.addParameter(ParameterString(self.EXTRA, "Additional creation parameters", "")) | ||
self.addOutput(OutputRaster(self.OUTPUT, "Output layer")) | ||
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def processAlgorithm(self, progress): | ||
out = self.getOutputValue(self.OUTPUT) | ||
noData = str(self.getParameterValue(self.NO_DATA)) | ||
projwin = str(self.getParameterValue(self.PROJWIN)) | ||
extra = str(self.getParameterValue(self.EXTRA)) | ||
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arguments = [] | ||
arguments.append("-of") | ||
arguments.append(GdalUtils.getFormatShortNameFromFilename(out)) | ||
arguments.append("-a_nodata") | ||
arguments.append(noData) | ||
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regionCoords = projwin.split(",") | ||
arguments.append("-projwin") | ||
arguments.append(regionCoords[0]) | ||
arguments.append(regionCoords[3]) | ||
arguments.append(regionCoords[1]) | ||
arguments.append(regionCoords[2]) | ||
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if len(extra) > 0: | ||
arguments.append(extra) | ||
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arguments.append(self.getParameterValue(self.INPUT)) | ||
arguments.append(out) | ||
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GdalUtils.runGdal(["gdal_translate", GdalUtils.escapeAndJoin(arguments)], progress) |
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