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# -*- coding: utf-8 -*-
"""
***************************************************************************
slopearea.py
---------------------
Date : October 2012
Copyright : (C) 2012 by Alexander Bruy
Email : alexander dot bruy at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
__author__ = 'Alexander Bruy'
__date__ = 'October 2012'
__copyright__ = '(C) 2012, Alexander Bruy'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import os
from qgis.PyQt.QtGui import QIcon
from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.core.ProcessingConfig import ProcessingConfig
from processing.core.GeoAlgorithmExecutionException import \
GeoAlgorithmExecutionException
from processing.core.parameters import ParameterRaster
from processing.core.parameters import ParameterNumber
from processing.core.outputs import OutputRaster
from .TauDEMUtils import TauDEMUtils
class SlopeArea(GeoAlgorithm):
SLOPE_GRID = 'SLOPE_GRID'
AREA_GRID = 'AREA_GRID'
SLOPE_EXPONENT = 'SLOPE_EXPONENT'
AREA_EXPONENT = 'AREA_EXPONENT'
SLOPE_AREA_GRID = 'SLOPE_AREA_GRID'
def getIcon(self):
return QIcon(os.path.dirname(__file__) + '/../../images/taudem.svg')
def defineCharacteristics(self):
self.name, self.i18n_name = self.trAlgorithm('Slope Area Combination')
self.cmdName = 'slopearea'
self.group, self.i18n_group = self.trAlgorithm('Stream Network Analysis tools')
self.addParameter(ParameterRaster(self.SLOPE_GRID,
self.tr('Slope Grid'), False))
self.addParameter(ParameterRaster(self.AREA_GRID,
self.tr('Contributing Area Grid'), False))
self.addParameter(ParameterNumber(self.SLOPE_EXPONENT,
self.tr('Slope Exponent'), 0, None, 2))
self.addParameter(ParameterNumber(self.AREA_EXPONENT,
self.tr('Area Exponent'), 0, None, 1))
self.addOutput(OutputRaster(self.SLOPE_AREA_GRID,
self.tr('Slope Area Grid')))
def processAlgorithm(self, progress):
commands = []
commands.append(os.path.join(TauDEMUtils.mpiexecPath(), 'mpiexec'))
processNum = ProcessingConfig.getSetting(TauDEMUtils.MPI_PROCESSES)
if processNum <= 0:
raise GeoAlgorithmExecutionException(
self.tr('Wrong number of MPI processes used. Please set '
'correct number before running TauDEM algorithms.'))
commands.append('-n')
commands.append(unicode(processNum))
commands.append(os.path.join(TauDEMUtils.taudemPath(), self.cmdName))
commands.append('-slp')
commands.append(self.getParameterValue(self.SLOPE_GRID))
commands.append('-sca')
commands.append(self.getParameterValue(self.AREA_GRID))
commands.append('-par')
commands.append(unicode(self.getParameterValue(self.SLOPE_EXPONENT)))
commands.append(unicode(self.getParameterValue(self.AREA_EXPONENT)))
commands.append('-sa')
commands.append(self.getOutputValue(self.SLOPE_AREA_GRID))
TauDEMUtils.executeTauDEM(commands, progress)
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