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114 lines
5.3 KiB
Python
114 lines
5.3 KiB
Python
# -*- 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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from builtins import str
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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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import os
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from qgis.core import (QgsProcessingParameterRasterLayer,
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QgsProcessingParameterBand,
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QgsProcessingParameterBoolean,
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QgsProcessingParameterNumber,
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QgsProcessingParameterRasterDestination)
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from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
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from processing.algs.gdal.GdalUtils import GdalUtils
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class hillshade(GdalAlgorithm):
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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 __init__(self):
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super().__init__()
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def initAlgorithm(self, config=None):
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self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT, self.tr('Input layer')))
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self.addParameter(QgsProcessingParameterBand(self.BAND,
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self.tr('Band number'), parentLayerParameterName=self.INPUT))
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self.addParameter(QgsProcessingParameterBoolean(self.COMPUTE_EDGES,
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self.tr('Compute edges'), defaultValue=False))
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self.addParameter(QgsProcessingParameterBoolean(self.ZEVENBERGEN,
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self.tr("Use Zevenbergen&Thorne formula (instead of the Horn's one)"), defaultValue=False))
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self.addParameter(QgsProcessingParameterNumber(self.Z_FACTOR,
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self.tr('Z factor (vertical exaggeration)'),
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type=QgsProcessingParameterNumber.Double, minValue=0.0, maxValue=99999999.999999, defaultValue=1.0))
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self.addParameter(QgsProcessingParameterNumber(self.SCALE,
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self.tr('Scale (ratio of vert. units to horiz.)'),
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type=QgsProcessingParameterNumber.Double, minValue=0.0, maxValue=99999999.999999, defaultValue=1.0))
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self.addParameter(QgsProcessingParameterNumber(self.AZIMUTH,
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self.tr('Azimuth of the light'),
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type=QgsProcessingParameterNumber.Double, minValue=0.0, maxValue=359.9, defaultValue=315.0))
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self.addParameter(QgsProcessingParameterNumber(self.ALTITUDE,
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self.tr('Altitude of the light'),
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type=QgsProcessingParameterNumber.Double, minValue=0.0, maxValue=99999999.999999, defaultValue=45.0))
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self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT, self.tr('Hillshade')))
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def name(self):
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return 'hillshade'
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def displayName(self):
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return self.tr('Hillshade')
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def group(self):
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return self.tr('Raster analysis')
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def getConsoleCommands(self, parameters, context, feedback):
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arguments = ['hillshade']
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arguments.append(self.parameterAsRasterLayer(parameters, self.INPUT, context).source())
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arguments.append(str(self.parameterAsOutputLayer(parameters, self.OUTPUT, context)))
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arguments.append('-b')
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arguments.append(str(self.parameterAsInt(parameters, self.BAND, context)))
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arguments.append('-z')
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arguments.append(str(self.parameterAsDouble(parameters, self.Z_FACTOR, context)))
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arguments.append('-s')
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arguments.append(str(self.parameterAsDouble(parameters, self.SCALE, context)))
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arguments.append('-az')
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arguments.append(str(self.parameterAsDouble(parameters, self.AZIMUTH, context)))
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arguments.append('-alt')
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arguments.append(str(self.parameterAsDouble(parameters, self.ALTITUDE, context)))
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if self.parameterAsBool(parameters, self.COMPUTE_EDGES, context):
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arguments.append('-compute_edges')
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if self.parameterAsBool(parameters, self.ZEVENBERGEN, context):
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arguments.append('-alg')
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arguments.append('ZevenbergenThorne')
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return ['gdaldem', GdalUtils.escapeAndJoin(arguments)]
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