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84 lines
3.2 KiB
Python
84 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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r_mapcalc.py
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------------
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Date : February 2016
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Copyright : (C) 2016 by Médéric Ribreux
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Email : medspx at medspx dot fr
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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__ = 'Médéric Ribreux'
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__date__ = 'February 2016'
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__copyright__ = '(C) 2016, Médéric Ribreux'
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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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from os import path
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def checkParameterValuesBeforeExecuting(alg, parameters, context):
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""" Verify if we have the right parameters """
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if (alg.parameterAsString(parameters, 'expression', context)
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and alg.parameterAsString(parameters, 'file', context)):
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return alg.tr("You need to set either inline expression or a rules file!")
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return None
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def processInputs(alg, parameters, context):
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# We need to use the same raster names than in QGIS
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if alg.getParameterValue('maps'):
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rasters = alg.getParameterValue('maps').split(',')
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for raster in rasters:
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if raster in list(alg.exportedLayers.keys()):
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continue
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alg.setSessionProjectionFromLayer(raster, alg.commands)
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destFilename = path.splitext(path.basename(raster))[0]
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alg.exportedLayers[raster] = destFilename
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command = 'r.in.gdal input={} output={} --overwrite -o'.format(raster, destFilename)
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alg.commands.append(command)
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alg.setSessionProjectionFromProject(alg.commands)
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region = str(alg.getParameterValue(alg.GRASS_REGION_EXTENT_PARAMETER))
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regionCoords = region.split(',')
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command = 'g.region'
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command += ' -a'
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command += ' n=' + str(regionCoords[3])
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command += ' s=' + str(regionCoords[2])
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command += ' e=' + str(regionCoords[1])
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command += ' w=' + str(regionCoords[0])
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cellsize = alg.getParameterValue(alg.GRASS_REGION_CELLSIZE_PARAMETER)
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if cellsize:
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command += ' res=' + str(cellsize)
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else:
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command += ' res=' + str(alg.getDefaultCellsize(parameters, context))
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alignToResolution = alg.getParameterValue(alg.GRASS_REGION_ALIGN_TO_RESOLUTION)
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if alignToResolution:
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command += ' -a'
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alg.commands.append(command)
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def processCommand(alg, parameters, context):
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# Remove output for command
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output_dir = alg.getOutputFromName('output_dir')
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maps = alg.getParameterFromName('maps')
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alg.removeOutputFromName('output_dir')
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alg.parameters.remove(maps)
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alg.processCommand()
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alg.addOutput(output_dir)
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alg.addParameter(maps)
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