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8398aae04b
when appropriate: - warp (i.e. reproject) - translate (i.e. file format conversion) - rearrange bands - clip by extent/mask
174 lines
7.6 KiB
Python
174 lines
7.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ClipRasterByMask.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 qgis.PyQt.QtGui import QIcon
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from qgis.core import (QgsRasterFileWriter,
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QgsProcessing,
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QgsProcessingException,
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QgsProcessingParameterDefinition,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterRasterLayer,
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QgsProcessingParameterEnum,
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QgsProcessingParameterString,
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QgsProcessingParameterNumber,
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QgsProcessingParameterBoolean,
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QgsProcessingParameterRasterDestination)
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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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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class ClipRasterByMask(GdalAlgorithm):
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INPUT = 'INPUT'
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MASK = 'MASK'
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NODATA = 'NODATA'
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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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DATA_TYPE = 'DATA_TYPE'
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OUTPUT = 'OUTPUT'
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TYPES = ['Use input layer data type', 'Byte', 'Int16', 'UInt16', 'UInt32', 'Int32', 'Float32', 'Float64', 'CInt16', 'CInt32', 'CFloat32', 'CFloat64']
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def __init__(self):
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super().__init__()
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def initAlgorithm(self, config=None):
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self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT,
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self.tr('Input layer')))
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self.addParameter(QgsProcessingParameterFeatureSource(self.MASK,
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self.tr('Mask layer'),
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[QgsProcessing.TypeVectorPolygon]))
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self.addParameter(QgsProcessingParameterNumber(self.NODATA,
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self.tr('Assign a specified nodata value to output bands'),
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type=QgsProcessingParameterNumber.Double,
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defaultValue=None,
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optional=True))
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self.addParameter(QgsProcessingParameterBoolean(self.ALPHA_BAND,
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self.tr('Create an output alpha band'),
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defaultValue=False))
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self.addParameter(QgsProcessingParameterBoolean(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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defaultValue=True))
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self.addParameter(QgsProcessingParameterBoolean(self.KEEP_RESOLUTION,
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self.tr('Keep resolution of output raster'),
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defaultValue=False))
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options_param = QgsProcessingParameterString(self.OPTIONS,
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self.tr('Additional creation options'),
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defaultValue='',
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optional=True)
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options_param.setFlags(options_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
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options_param.setMetadata({
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'widget_wrapper': {
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'class': 'processing.algs.gdal.ui.RasterOptionsWidget.RasterOptionsWidgetWrapper'}})
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self.addParameter(options_param)
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dataType_param = QgsProcessingParameterEnum(self.DATA_TYPE,
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self.tr('Output data type'),
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self.TYPES,
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allowMultiple=False,
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defaultValue=0)
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dataType_param.setFlags(dataType_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
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self.addParameter(dataType_param)
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self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT,
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self.tr('Clipped (mask)')))
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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 groupId(self):
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return 'rasterextraction'
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def commandName(self):
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return 'gdalwarp'
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def getConsoleCommands(self, parameters, context, feedback, executing=True):
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inLayer = self.parameterAsRasterLayer(parameters, self.INPUT, context)
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if inLayer is None:
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raise QgsProcessingException(self.invalidRasterError(parameters, self.INPUT))
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maskLayer, maskLayerName = self.getOgrCompatibleSource(self.MASK, parameters, context, feedback, executing)
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if self.NODATA in parameters and parameters[self.NODATA] is not None:
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nodata = self.parameterAsDouble(parameters, self.NODATA, context)
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else:
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nodata = None
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options = self.parameterAsString(parameters, self.OPTIONS, context)
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out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
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arguments = []
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data_type = self.parameterAsEnum(parameters, self.DATA_TYPE, context)
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if data_type:
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arguments.append('-ot ' + self.TYPES[data_type])
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arguments.append('-of')
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arguments.append(QgsRasterFileWriter.driverForExtension(os.path.splitext(out)[1]))
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if self.parameterAsBool(parameters, self.KEEP_RESOLUTION, context):
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arguments.append('-tr')
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arguments.append(str(inLayer.rasterUnitsPerPixelX()))
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arguments.append(str(-inLayer.rasterUnitsPerPixelY()))
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arguments.append('-tap')
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arguments.append('-cutline')
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arguments.append(maskLayer)
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if self.parameterAsBool(parameters, self.CROP_TO_CUTLINE, context):
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arguments.append('-crop_to_cutline')
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if self.parameterAsBool(parameters, self.ALPHA_BAND, context):
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arguments.append('-dstalpha')
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if nodata is not None:
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arguments.append('-dstnodata {}'.format(nodata))
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if options:
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arguments.extend(GdalUtils.parseCreationOptions(options))
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arguments.append(inLayer.source())
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arguments.append(out)
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return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]
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