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208 lines
10 KiB
Python
208 lines
10 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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merge.py
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---------------------
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Date : October 2014
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Copyright : (C) 2014 by Radoslaw Guzinski
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Email : rmgu at dhi-gras 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__ = 'Radoslaw Guzinski'
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__date__ = 'October 2014'
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__copyright__ = '(C) 2014, Radoslaw Guzinski'
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import os
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import pathlib
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from qgis.PyQt.QtCore import QCoreApplication
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from qgis.PyQt.QtGui import QIcon
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from qgis.core import (QgsProcessingAlgorithm,
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QgsProcessing,
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QgsProcessingParameterDefinition,
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QgsProperty,
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QgsProcessingParameters,
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QgsProcessingParameterMultipleLayers,
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QgsProcessingParameterEnum,
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QgsProcessingParameterBoolean,
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QgsProcessingParameterRasterDestination,
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QgsProcessingParameterCrs,
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QgsProcessingParameterString,
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QgsProcessingOutputLayerDefinition,
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QgsProcessingUtils)
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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 buildvrt(GdalAlgorithm):
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INPUT = 'INPUT'
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OUTPUT = 'OUTPUT'
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RESOLUTION = 'RESOLUTION'
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SEPARATE = 'SEPARATE'
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PROJ_DIFFERENCE = 'PROJ_DIFFERENCE'
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ADD_ALPHA = 'ADD_ALPHA'
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ASSIGN_CRS = 'ASSIGN_CRS'
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RESAMPLING = 'RESAMPLING'
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SRC_NODATA = 'SRC_NODATA'
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EXTRA = 'EXTRA'
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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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class ParameterVrtDestination(QgsProcessingParameterRasterDestination):
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def __init__(self, name, description):
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super().__init__(name, description)
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def clone(self):
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copy = ParameterVrtDestination(self.name(), self.description())
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return copy
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def defaultFileExtension(self):
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return 'vrt'
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def createFileFilter(self):
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return '{} (*.vrt *.VRT)'.format(QCoreApplication.translate("GdalAlgorithm", 'VRT files'))
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def supportedOutputRasterLayerExtensions(self):
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return ['vrt']
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def parameterAsOutputLayer(self, definition, value, context):
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return super(QgsProcessingParameterRasterDestination, self).parameterAsOutputLayer(definition, value, context)
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def isSupportedOutputValue(self, value, context):
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output_path = QgsProcessingParameters.parameterAsOutputLayer(self, value, context)
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if pathlib.Path(output_path).suffix.lower() != '.vrt':
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return False, QCoreApplication.translate("GdalAlgorithm", 'Output filename must use a .vrt extension')
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return True, ''
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self.RESAMPLING_OPTIONS = ((self.tr('Nearest Neighbour'), 'nearest'),
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(self.tr('Bilinear'), 'bilinear'),
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(self.tr('Cubic Convolution'), 'cubic'),
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(self.tr('B-Spline Convolution'), 'cubicspline'),
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(self.tr('Lanczos Windowed Sinc'), 'lanczos'),
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(self.tr('Average'), 'average'),
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(self.tr('Mode'), 'mode'))
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self.RESOLUTION_OPTIONS = ((self.tr('Average'), 'average'),
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(self.tr('Highest'), 'highest'),
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(self.tr('Lowest'), 'lowest'))
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self.addParameter(QgsProcessingParameterMultipleLayers(self.INPUT,
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self.tr('Input layers'),
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QgsProcessing.TypeRaster))
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self.addParameter(QgsProcessingParameterEnum(self.RESOLUTION,
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self.tr('Resolution'),
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options=[i[0] for i in self.RESOLUTION_OPTIONS],
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defaultValue=0))
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self.addParameter(QgsProcessingParameterBoolean(self.SEPARATE,
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self.tr('Place each input file into a separate band'),
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defaultValue=True))
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self.addParameter(QgsProcessingParameterBoolean(self.PROJ_DIFFERENCE,
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self.tr('Allow projection difference'),
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defaultValue=False))
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add_alpha_param = QgsProcessingParameterBoolean(self.ADD_ALPHA,
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self.tr('Add alpha mask band to VRT when source raster has none'),
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defaultValue=False)
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add_alpha_param.setFlags(add_alpha_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
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self.addParameter(add_alpha_param)
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assign_crs = QgsProcessingParameterCrs(self.ASSIGN_CRS,
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self.tr('Override projection for the output file'),
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defaultValue=None, optional=True)
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assign_crs.setFlags(assign_crs.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
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self.addParameter(assign_crs)
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resampling = QgsProcessingParameterEnum(self.RESAMPLING,
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self.tr('Resampling algorithm'),
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options=[i[0] for i in self.RESAMPLING_OPTIONS],
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defaultValue=0)
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resampling.setFlags(resampling.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
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self.addParameter(resampling)
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src_nodata_param = QgsProcessingParameterString(self.SRC_NODATA,
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self.tr('Nodata value(s) for input bands (space separated)'),
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defaultValue=None,
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optional=True)
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src_nodata_param.setFlags(src_nodata_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
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self.addParameter(src_nodata_param)
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extra_param = QgsProcessingParameterString(self.EXTRA,
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self.tr('Additional command-line parameters'),
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defaultValue=None,
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optional=True)
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extra_param.setFlags(extra_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
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self.addParameter(extra_param)
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self.addParameter(ParameterVrtDestination(self.OUTPUT, QCoreApplication.translate("ParameterVrtDestination", 'Virtual')))
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def name(self):
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return 'buildvirtualraster'
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def displayName(self):
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return QCoreApplication.translate("buildvrt", 'Build virtual raster')
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def icon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'gdaltools', 'vrt.png'))
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def group(self):
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return QCoreApplication.translate("buildvrt", 'Raster miscellaneous')
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def groupId(self):
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return 'rastermiscellaneous'
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def commandName(self):
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return "gdalbuildvrt"
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def getConsoleCommands(self, parameters, context, feedback, executing=True):
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arguments = []
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arguments.append('-resolution')
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arguments.append(self.RESOLUTION_OPTIONS[self.parameterAsEnum(parameters, self.RESOLUTION, context)][1])
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if self.parameterAsBoolean(parameters, buildvrt.SEPARATE, context):
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arguments.append('-separate')
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if self.parameterAsBoolean(parameters, buildvrt.PROJ_DIFFERENCE, context):
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arguments.append('-allow_projection_difference')
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if self.parameterAsBoolean(parameters, buildvrt.ADD_ALPHA, context):
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arguments.append('-addalpha')
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crs = self.parameterAsCrs(parameters, self.ASSIGN_CRS, context)
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if crs.isValid():
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arguments.append('-a_srs')
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arguments.append(GdalUtils.gdal_crs_string(crs))
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arguments.append('-r')
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arguments.append(self.RESAMPLING_OPTIONS[self.parameterAsEnum(parameters, self.RESAMPLING, context)][1])
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if self.SRC_NODATA in parameters and parameters[self.SRC_NODATA] not in (None, ''):
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nodata = self.parameterAsString(parameters, self.SRC_NODATA, context)
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arguments.append('-srcnodata "{}"'.format(nodata))
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if self.EXTRA in parameters and parameters[self.EXTRA] not in (None, ''):
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extra = self.parameterAsString(parameters, self.EXTRA, context)
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arguments.append(extra)
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# Always write input files to a text file in case there are many of them and the
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# length of the command will be longer then allowed in command prompt
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list_file = GdalUtils.writeLayerParameterToTextFile(filename='buildvrtInputFiles.txt', alg=self, parameters=parameters, parameter_name=self.INPUT, context=context, executing=executing, quote=False)
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arguments.append('-input_file_list')
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arguments.append(list_file)
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out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
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self.setOutputValue(self.OUTPUT, out)
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arguments.append(out)
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return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]
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