mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-31 00:06:02 -04:00
133 lines
4.8 KiB
Python
133 lines
4.8 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
extractprojection.py
|
|
---------------------
|
|
Date : September 2013
|
|
Copyright : (C) 2013 by Alexander Bruy
|
|
Email : alexander dot bruy at gmail dot com
|
|
***************************************************************************
|
|
* *
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published by *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
|
|
__author__ = 'Alexander Bruy'
|
|
__date__ = 'September 2013'
|
|
__copyright__ = '(C) 2013, Alexander Bruy'
|
|
|
|
import os
|
|
|
|
from qgis.PyQt.QtGui import QIcon
|
|
|
|
from osgeo import gdal, osr
|
|
|
|
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
|
|
from qgis.core import QgsProcessingException
|
|
from qgis.core import (QgsProcessingParameterRasterLayer,
|
|
QgsProcessingParameterBoolean,
|
|
QgsProcessingOutputFile)
|
|
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
|
|
|
|
|
class ExtractProjection(GdalAlgorithm):
|
|
INPUT = 'INPUT'
|
|
PRJ_FILE_CREATE = 'PRJ_FILE_CREATE'
|
|
WORLD_FILE = 'WORLD_FILE'
|
|
PRJ_FILE = 'PRJ_FILE'
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
def initAlgorithm(self, config=None):
|
|
self.addParameter(QgsProcessingParameterRasterLayer(
|
|
self.INPUT,
|
|
self.tr('Input file')))
|
|
self.addParameter(QgsProcessingParameterBoolean(
|
|
self.PRJ_FILE_CREATE,
|
|
self.tr('Create also .prj file'), False))
|
|
self.addOutput(QgsProcessingOutputFile(
|
|
self.WORLD_FILE,
|
|
self.tr('World file')))
|
|
self.addOutput(QgsProcessingOutputFile(
|
|
self.PRJ_FILE,
|
|
self.tr('ESRI Shapefile prj file')))
|
|
|
|
def name(self):
|
|
return 'extractprojection'
|
|
|
|
def displayName(self):
|
|
return self.tr('Extract projection')
|
|
|
|
def icon(self):
|
|
return QIcon(os.path.join(pluginPath, 'images', 'gdaltools',
|
|
'projection-export.png'))
|
|
|
|
def group(self):
|
|
return self.tr('Raster projections')
|
|
|
|
def groupId(self):
|
|
return 'rasterprojections'
|
|
|
|
def commandName(self):
|
|
return 'extractprojection'
|
|
|
|
def getConsoleCommands(self, parameters, context, feedback,
|
|
executing=True):
|
|
return [self.commandName()]
|
|
|
|
def processAlgorithm(self, parameters, context, feedback):
|
|
createPrj = self.parameterAsBoolean(parameters,
|
|
self.PRJ_FILE_CREATE,
|
|
context)
|
|
raster = self.parameterAsRasterLayer(parameters, self.INPUT,
|
|
context)
|
|
if raster.dataProvider().name() != 'gdal':
|
|
raise QgsProcessingException(self.tr('This algorithm can '
|
|
'only be used with '
|
|
'GDAL raster layers'))
|
|
rasterPath = raster.source()
|
|
rasterDS = gdal.Open(rasterPath, gdal.GA_ReadOnly)
|
|
geotransform = rasterDS.GetGeoTransform()
|
|
inputcrs = raster.crs()
|
|
crs = inputcrs.toWkt()
|
|
raster = None
|
|
rasterDS = None
|
|
|
|
outFileName = os.path.splitext(str(rasterPath))[0]
|
|
|
|
results = {}
|
|
if crs != '' and createPrj:
|
|
tmp = osr.SpatialReference()
|
|
tmp.ImportFromWkt(crs)
|
|
tmp.MorphToESRI()
|
|
crs = tmp.ExportToWkt()
|
|
tmp = None
|
|
|
|
with open(outFileName + '.prj', 'wt') as prj:
|
|
prj.write(crs)
|
|
results[self.PRJ_FILE] = outFileName + '.prj'
|
|
else:
|
|
results[self.PRJ_FILE] = None
|
|
|
|
with open(outFileName + '.wld', 'wt') as wld:
|
|
wld.write('%0.8f\n' % geotransform[1])
|
|
wld.write('%0.8f\n' % geotransform[4])
|
|
wld.write('%0.8f\n' % geotransform[2])
|
|
wld.write('%0.8f\n' % geotransform[5])
|
|
wld.write('%0.8f\n' % (geotransform[0]
|
|
+ 0.5 * geotransform[1]
|
|
+ 0.5 * geotransform[2]))
|
|
wld.write('%0.8f\n' % (geotransform[3]
|
|
+ 0.5 * geotransform[4]
|
|
+ 0.5 * geotransform[5]))
|
|
results[self.WORLD_FILE] = outFileName + '.wld'
|
|
|
|
return results
|