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162 lines
6.3 KiB
Python
162 lines
6.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ClipByMask.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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from builtins import str
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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 qgis.PyQt.QtGui import QIcon
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from qgis.core import QgsProcessingUtils
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from osgeo import gdal
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from processing.core.parameters import (ParameterRaster,
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ParameterVector,
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ParameterBoolean,
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ParameterString,
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ParameterSelection)
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from processing.core.outputs import OutputRaster
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from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
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from processing.algs.gdal.GdalUtils import GdalUtils
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from processing.tools import dataobjects
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from processing.tools.vector import ogrConnectionString
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class ClipByMask(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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MASK = 'MASK'
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ALPHA_BAND = 'ALPHA_BAND'
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CROP_TO_CUTLINE = 'CROP_TO_CUTLINE'
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KEEP_RESOLUTION = 'KEEP_RESOLUTION'
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OPTIONS = 'OPTIONS'
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RTYPE = 'RTYPE'
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TYPE = ['Byte', 'Int16', 'UInt16', 'UInt32', 'Int32', 'Float32', 'Float64']
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def name(self):
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return 'cliprasterbymasklayer'
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def displayName(self):
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return self.tr('Clip raster by mask layer')
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def icon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'gdaltools', 'raster-clip.png'))
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def group(self):
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return self.tr('Raster extraction')
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def defineCharacteristics(self):
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self.addParameter(ParameterRaster(self.INPUT, self.tr('Input layer'), False))
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self.addParameter(ParameterVector(self.MASK, self.tr('Mask layer'),
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[dataobjects.TYPE_VECTOR_POLYGON]))
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self.addParameter(ParameterString(self.NO_DATA,
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self.tr("Nodata value, leave blank to take the nodata value from input"),
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'', optional=True))
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self.addParameter(ParameterBoolean(self.ALPHA_BAND,
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self.tr('Create and output alpha band'),
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False))
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self.addParameter(ParameterBoolean(self.CROP_TO_CUTLINE,
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self.tr('Crop the extent of the target dataset to the extent of the cutline'),
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True))
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self.addParameter(ParameterBoolean(self.KEEP_RESOLUTION,
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self.tr('Keep resolution of output raster'),
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False))
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self.addParameter(ParameterString(self.OPTIONS,
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self.tr('Additional creation options'),
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optional=True,
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metadata={'widget_wrapper': 'processing.algs.gdal.ui.RasterOptionsWidget.RasterOptionsWidgetWrapper'}))
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self.addParameter(ParameterSelection(self.RTYPE,
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self.tr('Output raster type'),
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self.TYPE, 5))
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self.addOutput(OutputRaster(self.OUTPUT, self.tr('Clipped (mask)')))
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def getConsoleCommands(self):
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out = self.getOutputValue(self.OUTPUT)
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mask = self.getParameterValue(self.MASK)
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context = dataobjects.createContext()
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maskLayer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.MASK), context)
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ogrMask = ogrConnectionString(mask)[1:-1]
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noData = self.getParameterValue(self.NO_DATA)
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opts = self.getParameterValue(self.OPTIONS)
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if noData is not None:
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noData = str(noData)
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addAlphaBand = self.getParameterValue(self.ALPHA_BAND)
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cropToCutline = self.getParameterValue(self.CROP_TO_CUTLINE)
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keepResolution = self.getParameterValue(self.KEEP_RESOLUTION)
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arguments = []
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arguments.append('-ot')
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arguments.append(self.TYPE[self.getParameterValue(self.RTYPE)])
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arguments.append('-q')
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arguments.append('-of')
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arguments.append(GdalUtils.getFormatShortNameFromFilename(out))
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if noData and len(noData) > 0:
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arguments.append('-dstnodata')
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arguments.append(noData)
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if keepResolution:
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r = gdal.Open(self.getParameterValue(self.INPUT))
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geoTransform = r.GetGeoTransform()
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r = None
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arguments.append('-tr')
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arguments.append(str(geoTransform[1]))
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arguments.append(str(geoTransform[5]))
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arguments.append('-tap')
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arguments.append('-cutline')
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arguments.append(ogrMask)
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if maskLayer and maskLayer.subsetString() != '':
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arguments.append('-cwhere')
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arguments.append(maskLayer.subsetString())
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if cropToCutline:
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arguments.append('-crop_to_cutline')
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if addAlphaBand:
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arguments.append('-dstalpha')
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if opts:
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arguments.append('-co')
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arguments.append(opts)
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if GdalUtils.version() in [2010000, 2010100]:
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arguments.append("--config GDALWARP_IGNORE_BAD_CUTLINE YES")
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arguments.append(self.getParameterValue(self.INPUT))
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arguments.append(out)
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return ['gdalwarp', GdalUtils.escapeAndJoin(arguments)]
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