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2628c480c5
Prevent changes to files that weren't changed between releases. This eases review of the changes between releases significantly.
134 lines
4.8 KiB
Python
134 lines
4.8 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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extractprojection.py
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---------------------
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Date : September 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__ = 'September 2013'
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__copyright__ = '(C) 2013, Alexander Bruy'
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import os
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from qgis.PyQt.QtGui import QIcon
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from osgeo import gdal, osr
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from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
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from qgis.core import QgsProcessingException
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from qgis.core import (QgsProcessingParameterRasterLayer,
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QgsProcessingParameterBoolean,
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QgsProcessingOutputFile)
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class ExtractProjection(GdalAlgorithm):
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INPUT = 'INPUT'
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PRJ_FILE_CREATE = 'PRJ_FILE_CREATE'
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WORLD_FILE = 'WORLD_FILE'
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PRJ_FILE = 'PRJ_FILE'
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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(
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self.INPUT,
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self.tr('Input file')))
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self.addParameter(QgsProcessingParameterBoolean(
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self.PRJ_FILE_CREATE,
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self.tr('Create also .prj file'), False))
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self.addOutput(QgsProcessingOutputFile(
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self.WORLD_FILE,
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self.tr('World file')))
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self.addOutput(QgsProcessingOutputFile(
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self.PRJ_FILE,
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self.tr('ESRI Shapefile prj file')))
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def name(self):
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return 'extractprojection'
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def displayName(self):
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return self.tr('Extract projection')
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def icon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'gdaltools',
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'projection-export.png'))
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def group(self):
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return self.tr('Raster projections')
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def groupId(self):
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return 'rasterprojections'
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def commandName(self):
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return 'extractprojection'
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def getConsoleCommands(self, parameters, context, feedback,
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executing=True):
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return [self.commandName()]
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def processAlgorithm(self, parameters, context, feedback):
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createPrj = self.parameterAsBoolean(parameters,
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self.PRJ_FILE_CREATE,
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context)
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raster = self.parameterAsRasterLayer(parameters, self.INPUT,
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context)
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if not raster.dataProvider().name() == 'gdal':
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raise QgsProcessingException(self.tr('This algorithm can '
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'only be used with '
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'GDAL raster layers'))
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rasterPath = raster.source()
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rasterDS = gdal.Open(rasterPath, gdal.GA_ReadOnly)
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geotransform = rasterDS.GetGeoTransform()
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inputcrs = raster.crs()
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crs = inputcrs.toWkt()
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raster = None
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rasterDS = None
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outFileName = os.path.splitext(str(rasterPath))[0]
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results = {}
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if crs != '' and createPrj:
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tmp = osr.SpatialReference()
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tmp.ImportFromWkt(crs)
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tmp.MorphToESRI()
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crs = tmp.ExportToWkt()
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tmp = None
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with open(outFileName + '.prj', 'wt') as prj:
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prj.write(crs)
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results[self.PRJ_FILE] = outFileName + '.prj'
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else:
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results[self.PRJ_FILE] = None
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with open(outFileName + '.wld', 'wt') as wld:
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wld.write('%0.8f\n' % geotransform[1])
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wld.write('%0.8f\n' % geotransform[4])
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wld.write('%0.8f\n' % geotransform[2])
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wld.write('%0.8f\n' % geotransform[5])
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wld.write('%0.8f\n' % (geotransform[0]
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+ 0.5 * geotransform[1]
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+ 0.5 * geotransform[2]))
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wld.write('%0.8f\n' % (geotransform[3]
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+ 0.5 * geotransform[4]
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+ 0.5 * geotransform[5]))
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results[self.WORLD_FILE] = outFileName + '.wld'
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return results
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