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104 lines
4.1 KiB
Python
104 lines
4.1 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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hillshade.py
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---------------------
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Date : October 2013
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Copyright : (C) 2013 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 2013'
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__copyright__ = '(C) 2013, 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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from PyQt4.QtGui import *
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.parameters.ParameterRaster import ParameterRaster
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from processing.parameters.ParameterBoolean import ParameterBoolean
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from processing.parameters.ParameterNumber import ParameterNumber
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from processing.outputs.OutputRaster import OutputRaster
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from processing.gdal.GdalUtils import GdalUtils
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from processing.tools.system import *
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class hillshade(GeoAlgorithm):
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INPUT = 'INPUT'
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BAND = 'BAND'
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COMPUTE_EDGES = 'COMPUTE_EDGES'
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ZEVENBERGEN = 'ZEVENBERGEN'
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Z_FACTOR = 'Z_FACTOR'
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SCALE = 'SCALE'
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AZIMUTH = 'AZIMUTH'
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ALTITUDE = 'ALTITUDE'
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OUTPUT = 'OUTPUT'
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#def getIcon(self):
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# filepath = os.path.dirname(__file__) + '/icons/dem.png'
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# return QIcon(filepath)
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def defineCharacteristics(self):
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self.name = 'Hillshade'
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self.group = '[GDAL] Analysis'
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self.addParameter(ParameterRaster(self.INPUT, 'Input layer'))
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self.addParameter(ParameterNumber(self.BAND, 'Band number', 1, 99, 1))
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self.addParameter(ParameterBoolean(self.COMPUTE_EDGES, 'Compute edges',
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False))
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self.addParameter(ParameterBoolean(self.ZEVENBERGEN,
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"Use Zevenbergen&Thorne formula (instead of the Horn's one)",
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False))
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self.addParameter(ParameterNumber(self.Z_FACTOR,
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'Z factor (vertical exaggeration)', 0.0,
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99999999.999999, 1.0))
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self.addParameter(ParameterNumber(self.SCALE,
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'Scale (ratio of vert. units to horiz.)', 0.0,
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99999999.999999, 1.0))
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self.addParameter(ParameterNumber(self.AZIMUTH,
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'Azimuth of the light', 0.0, 359.0, 315.0))
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self.addParameter(ParameterNumber(self.ALTITUDE,
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'Altitude of the light', 0.0, 99999999.999999, 45.0))
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self.addOutput(OutputRaster(self.OUTPUT, 'Output file'))
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def processAlgorithm(self, progress):
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arguments = ['hillshade']
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arguments.append(unicode(self.getParameterValue(self.INPUT)))
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arguments.append(unicode(self.getOutputValue(self.OUTPUT)))
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arguments.append('-b')
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arguments.append(str(self.getParameterValue(self.BAND)))
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arguments.append('-z')
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arguments.append(str(self.getParameterValue(self.Z_FACTOR)))
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arguments.append('-s')
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arguments.append(str(self.getParameterValue(self.SCALE)))
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arguments.append('-az')
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arguments.append(str(self.getParameterValue(self.AZIMUTH)))
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arguments.append('-alt')
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arguments.append(str(self.getParameterValue(self.ALTITUDE)))
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if self.getParameterValue(self.COMPUTE_EDGES):
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arguments.append('-compute_edges')
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if self.getParameterValue(self.ZEVENBERGEN):
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arguments.append('-alg')
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arguments.append('ZevenbergenThorne')
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GdalUtils.runGdal(['gdaldem',
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GdalUtils.escapeAndJoin(arguments)], progress)
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