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e38849d750
Correctly generate commands when run on eg /vsis3/ layer sources, and translate credential options to "--config KEY VALUE" arguments for GDAL commands
157 lines
7.1 KiB
Python
157 lines
7.1 KiB
Python
"""
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***************************************************************************
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viewshed.py
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---------------------
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Date : October 2019
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Copyright : (C) 2019 by Alexander Bruy
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Email : alexander dot 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__ = 'October 2019'
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__copyright__ = '(C) 2019, Alexander Bruy'
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import os
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from qgis.core import (QgsRasterFileWriter,
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QgsProcessingException,
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QgsProcessingParameterDefinition,
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QgsProcessingParameterRasterLayer,
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QgsProcessingParameterBand,
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QgsProcessingParameterPoint,
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QgsProcessingParameterNumber,
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QgsProcessingParameterDistance,
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QgsProcessingParameterString,
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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 viewshed(GdalAlgorithm):
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INPUT = 'INPUT'
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BAND = 'BAND'
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OBSERVER = 'OBSERVER'
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OBSERVER_HEIGHT = 'OBSERVER_HEIGHT'
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TARGET_HEIGHT = 'TARGET_HEIGHT'
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MAX_DISTANCE = 'MAX_DISTANCE'
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OPTIONS = 'OPTIONS'
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EXTRA = 'EXTRA'
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OUTPUT = 'OUTPUT'
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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(QgsProcessingParameterBand(self.BAND,
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self.tr('Band number'),
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1,
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parentLayerParameterName=self.INPUT))
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self.addParameter(QgsProcessingParameterPoint(self.OBSERVER,
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self.tr('Observer location')))
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self.addParameter(QgsProcessingParameterNumber(self.OBSERVER_HEIGHT,
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self.tr('Observer height, DEM units'),
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type=QgsProcessingParameterNumber.Type.Double,
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minValue=0.0,
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defaultValue=1.0))
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self.addParameter(QgsProcessingParameterNumber(self.TARGET_HEIGHT,
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self.tr('Target height, DEM units'),
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type=QgsProcessingParameterNumber.Type.Double,
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minValue=0.0,
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defaultValue=1.0))
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self.addParameter(QgsProcessingParameterDistance(self.MAX_DISTANCE,
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self.tr('Maximum distance from observer to compute visibility'),
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parentParameterName=self.INPUT,
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minValue=0.0,
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defaultValue=100.0))
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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.Flag.FlagAdvanced)
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options_param.setMetadata({'widget_wrapper': {'widget_type': 'rasteroptions'}})
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self.addParameter(options_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.Flag.FlagAdvanced)
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self.addParameter(extra_param)
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self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT,
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self.tr('Output')))
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def name(self):
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return 'viewshed'
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def displayName(self):
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return self.tr('Viewshed')
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def group(self):
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return self.tr('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 'gdal_viewshed'
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def getConsoleCommands(self, parameters, context, feedback, executing=True):
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dem = self.parameterAsRasterLayer(parameters, self.INPUT, context)
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if dem is None:
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raise QgsProcessingException(self.invalidRasterError(parameters, self.INPUT))
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dem_input_details = GdalUtils.gdal_connection_details_from_layer(
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dem)
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out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
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self.setOutputValue(self.OUTPUT, out)
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observer = self.parameterAsPoint(parameters, self.OBSERVER, context, dem.crs())
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arguments = [
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'-b',
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f'{self.parameterAsInt(parameters, self.BAND, context)}',
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'-ox',
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f'{observer.x()}',
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'-oy',
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f'{observer.y()}',
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'-oz',
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f'{self.parameterAsDouble(parameters, self.OBSERVER_HEIGHT, context)}',
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'-tz',
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f'{self.parameterAsDouble(parameters, self.TARGET_HEIGHT, context)}',
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'-md',
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f'{self.parameterAsDouble(parameters, self.MAX_DISTANCE, context)}',
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'-f',
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QgsRasterFileWriter.driverForExtension(os.path.splitext(out)[1])
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]
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options = self.parameterAsString(parameters, self.OPTIONS, context)
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if options:
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arguments.extend(GdalUtils.parseCreationOptions(options))
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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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arguments.append(dem_input_details.connection_string)
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arguments.append(out)
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if dem_input_details.credential_options:
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arguments.extend(dem_input_details.credential_options_as_arguments())
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return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]
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