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97 lines
3.9 KiB
Python
97 lines
3.9 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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lengtharea.py
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---------------------
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Date : October 2012
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Copyright : (C) 2012 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 2012'
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__copyright__ = '(C) 2012, 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 processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.ProcessingConfig import ProcessingConfig
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from processing.core.GeoAlgorithmExecutionException import \
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GeoAlgorithmExecutionException
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from processing.core.parameters import ParameterRaster
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from processing.core.parameters import ParameterNumber
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from processing.core.outputs import OutputRaster
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from .TauDEMUtils import TauDEMUtils
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class LengthArea(GeoAlgorithm):
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LENGTH_GRID = 'LENGTH_GRID'
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CONTRIB_AREA_GRID = 'CONTRIB_AREA_GRID'
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THRESHOLD = 'THRESHOLD'
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EXPONENT = 'EXPONENT'
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STREAM_SOURCE_GRID = 'STREAM_SOURCE_GRID'
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def getIcon(self):
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return QIcon(os.path.dirname(__file__) + '/../../images/taudem.svg')
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def defineCharacteristics(self):
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self.name, self.i18n_name = self.trAlgorithm('Length Area Stream Source')
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self.cmdName = 'lengtharea'
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self.group, self.i18n_group = self.trAlgorithm('Stream Network Analysis tools')
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self.addParameter(ParameterRaster(self.LENGTH_GRID,
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self.tr('Length Grid'), False))
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self.addParameter(ParameterRaster(self.CONTRIB_AREA_GRID,
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self.tr('Contributing Area Grid'), False))
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self.addParameter(ParameterNumber(self.THRESHOLD,
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self.tr('Threshold'), 0, None, 0.03))
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self.addParameter(ParameterNumber(self.EXPONENT,
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self.tr('Exponent'), 0, None, 1.3))
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self.addOutput(OutputRaster(self.STREAM_SOURCE_GRID,
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self.tr('Stream Source Grid')))
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def processAlgorithm(self, progress):
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commands = []
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commands.append(os.path.join(TauDEMUtils.mpiexecPath(), 'mpiexec'))
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processNum = ProcessingConfig.getSetting(TauDEMUtils.MPI_PROCESSES)
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if processNum <= 0:
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raise GeoAlgorithmExecutionException(
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self.tr('Wrong number of MPI processes used. Please set '
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'correct number before running TauDEM algorithms.'))
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commands.append('-n')
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commands.append(unicode(processNum))
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commands.append(os.path.join(TauDEMUtils.taudemPath(), self.cmdName))
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commands.append('-plen')
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commands.append(self.getParameterValue(self.LENGTH_GRID))
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commands.append('-ad8')
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commands.append(self.getParameterValue(self.CONTRIB_AREA_GRID))
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commands.append('-par')
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commands.append(unicode(self.getParameterValue(self.THRESHOLD)))
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commands.append(unicode(self.getParameterValue(self.EXPONENT)))
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commands.append('-ss')
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commands.append(self.getOutputValue(self.STREAM_SOURCE_GRID))
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TauDEMUtils.executeTauDEM(commands, progress)
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