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RasterCH_LV95ETRS89DirInv.py
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RasterCH_LV95ETRS89DirInv.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
RasterCH_LV95ETRS89DirInv.py
---------------------
Date : March 2015
Copyright : (C) 2015 by Giovanni Manghi
Email : giovanni dot manghi at naturalgis dot pt
***************************************************************************
* *
* 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__ = 'Giovanni Manghi'
__date__ = 'March 2015'
__copyright__ = '(C) 2015, Giovanni Manghi'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import inspect
import os
from PyQt4.QtGui import *
from qgis.core import *
from processing.gui.Help2Html import getHtmlFromRstFile
try:
from processing.parameters.ParameterRaster import ParameterRaster
from processing.parameters.ParameterSelection import ParameterSelection
from processing.outputs.OutputRaster import OutputRaster
except:
from processing.core.parameters import ParameterRaster
from processing.core.parameters import ParameterSelection
from processing.core.outputs import OutputRaster
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.algs.gdal.GdalUtils import GdalUtils
class RasterCH_LV95ETRS89DirInv(GdalAlgorithm):
INPUT = 'INPUT'
OUTPUT = 'OUTPUT'
TRANSF = 'TRANSF'
TRANSF_OPTIONS = ['Direct: CH1903/LV03 [EPSG:21781] -> New Data]',
'Inverse: New Data -> CH1903/LV03 [EPSG:21781]']
CRS = 'CRS'
CRS_OPTIONS = ['ETRS89 [EPSG:4258]',
'CH1903+ [EPSG:2056]']
GRID = 'GRID'
GRID_OPTIONS = ['CHENyx06']
def getIcon(self):
return QIcon(os.path.dirname(__file__) + '/icons/ch.png')
def help(self):
name = self.commandLineName().split(':')[1].lower()
filename = os.path.join(os.path.dirname(inspect.getfile(self.__class__)), 'help', name + '.rst')
try:
html = getHtmlFromRstFile(filename)
return True, html
except:
return False, None
def defineCharacteristics(self):
self.name = '[CH] Direct and inverse Raster transformation'
self.group = '[CH] Switzerland'
self.addParameter(ParameterRaster(self.INPUT, 'Input raster', False))
self.addParameter(ParameterSelection(self.TRANSF, 'Transformation',
self.TRANSF_OPTIONS))
self.addParameter(ParameterSelection(self.CRS, 'New Datum',
self.CRS_OPTIONS))
self.addParameter(ParameterSelection(self.GRID, 'NTv2 Grid',
self.GRID_OPTIONS))
self.addOutput(OutputRaster(self.OUTPUT, 'Output'))
def processAlgorithm(self, progress):
if self.getParameterValue(self.TRANSF) == 0:
# Direct transformation
arguments = ['-t_srs']
if self.getParameterValue(self.CRS) == 0:
# CH1903+/LV95
if self.getParameterValue(self.GRID) == 0:
# CHENyx06
arguments.append('+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 +k_0=1 +x_0=2600000 +y_0=1200000 +ellps=bessel +nadgrids=@null +wktext +units=m')
gridname = 'CHENYX06a.gsb'
else:
# ETRS89
if self.getParameterValue(self.GRID) == 0:
# CHENyx06
arguments.append('EPSG:4258')
gridname = 'chenyx06etrs.gsb'
arguments.append('-s_srs')
arguments.append('+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 +k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel +nadgrids=' + os.path.dirname(__file__) + '/grids/' + gridname + ' +wktext +units=m +no_defs')
else:
# Inverse transformation
arguments = ['-s_srs']
if self.getParameterValue(self.CRS) == 0:
# CH1903+/LV95
if self.getParameterValue(self.GRID) == 0:
# CHENyx06
arguments.append('+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 +k_0=1 +x_0=2600000 +y_0=1200000 +ellps=bessel +nadgrids=@null +wktext +units=m')
gridname = 'CHENYX06a.gsb'
else:
# ETRS89
if self.getParameterValue(self.GRID) == 0:
# CHENyx06
arguments.append('EPSG:4258')
gridname = 'chenyx06etrs.gsb'
arguments.append('-t_srs')
arguments.append('+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 +k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel +nadgrids=' + os.path.dirname(__file__) + '/grids/' + gridname + ' +wktext +units=m +no_defs')
arguments.append('-multi')
arguments.append('-of')
out = self.getOutputValue(self.OUTPUT)
arguments.append(GdalUtils.getFormatShortNameFromFilename(out))
arguments.append(self.getParameterValue(self.INPUT))
arguments.append(out)
if os.path.isfile(os.path.dirname(__file__) + '/grids/CHENYX06a.gsb') is False:
import urllib
urllib.urlretrieve ("https://github.com/NaturalGIS/ntv2_transformations_grids_and_sample_data/raw/master/ch/CHENYX06a.gsb", os.path.dirname(__file__) + "/grids/CHENYX06a.gsb")
urllib.urlretrieve ("https://github.com/NaturalGIS/ntv2_transformations_grids_and_sample_data/raw/master/ch/chenyx06etrs.gsb", os.path.dirname(__file__) + "/grids/chenyx06etrs.gsb")
GdalUtils.runGdal(['gdalwarp', GdalUtils.escapeAndJoin(arguments)],
progress)