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2628c480c5
Prevent changes to files that weren't changed between releases. This eases review of the changes between releases significantly.
92 lines
3.8 KiB
Python
92 lines
3.8 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 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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import os
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from qgis.PyQt.QtGui import QIcon
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from qgis.analysis import QgsHillshadeFilter
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from qgis.core import (QgsRasterFileWriter,
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QgsProcessingParameterRasterLayer,
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QgsProcessingParameterNumber,
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QgsProcessingParameterRasterDestination)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class Hillshade(QgisAlgorithm):
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INPUT = 'INPUT'
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Z_FACTOR = 'Z_FACTOR'
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AZIMUTH = 'AZIMUTH'
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V_ANGLE = 'V_ANGLE'
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OUTPUT = 'OUTPUT'
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def icon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'dem.png'))
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def group(self):
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return self.tr('Raster terrain analysis')
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def groupId(self):
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return 'rasterterrainanalysis'
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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,
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self.tr('Elevation layer')))
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self.addParameter(QgsProcessingParameterNumber(self.Z_FACTOR,
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self.tr('Z factor'), QgsProcessingParameterNumber.Double,
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1, False, 0.00))
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self.addParameter(QgsProcessingParameterNumber(self.AZIMUTH,
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self.tr('Azimuth (horizontal angle)'), QgsProcessingParameterNumber.Double,
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300, False, 0, 360))
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self.addParameter(QgsProcessingParameterNumber(self.V_ANGLE,
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self.tr('Vertical angle'), QgsProcessingParameterNumber.Double,
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40, False, 1, 90))
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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 processAlgorithm(self, parameters, context, feedback):
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inputFile = self.parameterAsRasterLayer(parameters, self.INPUT, context).source()
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zFactor = self.parameterAsDouble(parameters, self.Z_FACTOR, context)
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azimuth = self.parameterAsDouble(parameters, self.AZIMUTH, context)
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vAngle = self.parameterAsDouble(parameters, self.V_ANGLE, context)
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outputFile = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
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outputFormat = QgsRasterFileWriter.driverForExtension(os.path.splitext(outputFile)[1])
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hillshade = QgsHillshadeFilter(inputFile, outputFile, outputFormat, azimuth, vAngle)
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hillshade.setZFactor(zFactor)
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hillshade.processRaster(feedback)
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return {self.OUTPUT: outputFile}
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