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286 lines
10 KiB
Python
286 lines
10 KiB
Python
"""
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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 (
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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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)
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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(
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QCoreApplication.translate("GdalAlgorithm", "VRT files")
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)
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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(
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QgsProcessingParameterRasterDestination, self
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).parameterAsOutputLayer(definition, value, context)
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def isSupportedOutputValue(self, value, context):
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output_path = QgsProcessingParameters.parameterAsOutputLayer(
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self, value, context, testOnly=True
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)
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if pathlib.Path(output_path).suffix.lower() != ".vrt":
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return False, QCoreApplication.translate(
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"GdalAlgorithm", "Output filename must use a .vrt extension"
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)
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return True, ""
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self.RESAMPLING_OPTIONS = (
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(self.tr("Nearest Neighbour"), "nearest"),
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(self.tr("Bilinear (2x2 Kernel)"), "bilinear"),
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(self.tr("Cubic (4x4 Kernel)"), "cubic"),
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(self.tr("Cubic B-Spline (4x4 Kernel)"), "cubicspline"),
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(self.tr("Lanczos (6x6 Kernel)"), "lanczos"),
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(self.tr("Average"), "average"),
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(self.tr("Mode"), "mode"),
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)
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self.RESOLUTION_OPTIONS = (
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(self.tr("Average"), "average"),
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(self.tr("Highest"), "highest"),
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(self.tr("Lowest"), "lowest"),
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)
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self.addParameter(
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QgsProcessingParameterMultipleLayers(
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self.INPUT, self.tr("Input layers"), QgsProcessing.SourceType.TypeRaster
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)
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)
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self.addParameter(
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QgsProcessingParameterEnum(
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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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)
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)
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separate_param = QgsProcessingParameterBoolean(
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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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)
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# default to not using separate bands is a friendlier option, but we can't change the parameter's actual
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# defaultValue without breaking API!
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separate_param.setGuiDefaultValueOverride(False)
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self.addParameter(separate_param)
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self.addParameter(
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QgsProcessingParameterBoolean(
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self.PROJ_DIFFERENCE,
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self.tr("Allow projection difference"),
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defaultValue=False,
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)
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)
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add_alpha_param = QgsProcessingParameterBoolean(
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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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)
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add_alpha_param.setFlags(
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add_alpha_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
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)
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self.addParameter(add_alpha_param)
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assign_crs = QgsProcessingParameterCrs(
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self.ASSIGN_CRS,
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self.tr("Override projection for the output file"),
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defaultValue=None,
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optional=True,
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)
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assign_crs.setFlags(
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assign_crs.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
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)
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self.addParameter(assign_crs)
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resampling = QgsProcessingParameterEnum(
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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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)
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resampling.setFlags(
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resampling.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
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)
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self.addParameter(resampling)
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src_nodata_param = QgsProcessingParameterString(
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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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)
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src_nodata_param.setFlags(
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src_nodata_param.flags()
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| QgsProcessingParameterDefinition.Flag.FlagAdvanced
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)
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self.addParameter(src_nodata_param)
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extra_param = QgsProcessingParameterString(
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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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)
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extra_param.setFlags(
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extra_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
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)
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self.addParameter(extra_param)
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self.addParameter(
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ParameterVrtDestination(
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self.OUTPUT,
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QCoreApplication.translate("ParameterVrtDestination", "Virtual"),
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)
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)
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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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"-overwrite",
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"-resolution",
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self.RESOLUTION_OPTIONS[
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self.parameterAsEnum(parameters, self.RESOLUTION, context)
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][1],
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]
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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(
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self.RESAMPLING_OPTIONS[
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self.parameterAsEnum(parameters, self.RESAMPLING, context)
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][1]
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)
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if self.SRC_NODATA in parameters and parameters[self.SRC_NODATA] not in (
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None,
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"",
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):
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nodata = self.parameterAsString(parameters, self.SRC_NODATA, context)
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arguments.append("-srcnodata")
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arguments.append(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(
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filename="buildvrtInputFiles.txt",
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alg=self,
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parameters=parameters,
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parameter_name=self.INPUT,
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context=context,
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executing=executing,
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quote=False,
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)
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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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