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81 lines
3.2 KiB
Python
81 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ReliefAuto.py
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---------------------
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Date : October 2016
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Copyright : (C) 2016 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 2016'
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__copyright__ = '(C) 2016, 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 qgis.analysis import QgsRelief
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from processing.core.GeoAlgorithm import GeoAlgorithm
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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 processing.core.outputs import OutputTable
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from processing.tools import raster
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class ReliefAuto(GeoAlgorithm):
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INPUT_LAYER = 'INPUT_LAYER'
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Z_FACTOR = 'Z_FACTOR'
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OUTPUT_LAYER = 'OUTPUT_LAYER'
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FREQUENCY_DISTRIBUTION = 'FREQUENCY_DISTRIBUTION'
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def getIcon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'dem.png'))
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def defineCharacteristics(self):
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self.name, self.i18n_name = self.trAlgorithm('Relief (automatic colors)')
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self.group, self.i18n_group = self.trAlgorithm('Raster terrain analysis')
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self.addParameter(ParameterRaster(self.INPUT_LAYER,
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self.tr('Elevation layer')))
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self.addParameter(ParameterNumber(self.Z_FACTOR,
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self.tr('Z factor'), 1.0, 999999.99, 1.0))
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self.addOutput(OutputRaster(self.OUTPUT_LAYER,
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self.tr('Relief')))
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self.addOutput(OutputTable(self.FREQUENCY_DISTRIBUTION,
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self.tr('Frequency distribution')))
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def processAlgorithm(self, progress):
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inputFile = self.getParameterValue(self.INPUT_LAYER)
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zFactor = self.getParameterValue(self.Z_FACTOR)
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outputFile = self.getOutputValue(self.OUTPUT_LAYER)
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frequencyDistribution = self.getOutputValue(self.FREQUENCY_DISTRIBUTION)
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outputFormat = raster.formatShortNameFromFileName(outputFile)
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relief = QgsRelief(inputFile, outputFile, outputFormat)
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colors = relief.calculateOptimizedReliefClasses()
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relief.setReliefColors(colors)
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relief.setZFactor(zFactor)
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relief.exportFrequencyDistributionToCsv(frequencyDistribution)
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relief.processRaster(None)
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