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RasterAU_GDA94_2020DirInv.py
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RasterAU_GDA94_2020DirInv.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
RasterAU_GDA94_2020DirInv.py
---------------------
Date : August 2019
Copyright : (C) 2019 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__ = 'Alexander Bruy, Giovanni Manghi'
__date__ = 'August 2019'
__copyright__ = '(C) 2019, Giovanni Manghi'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import os
from urllib.request import urlretrieve
from qgis.PyQt.QtGui import QIcon
from qgis.core import (QgsRasterFileWriter,
QgsProcessingException,
QgsProcessingParameterRasterLayer,
QgsProcessingParameterEnum,
QgsProcessingParameterRasterDestination
)
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.algs.gdal.GdalUtils import GdalUtils
from ntv2_transformations.transformations import au_transformation_gda
pluginPath = os.path.dirname(__file__)
class RasterAU_GDA94_2020DirInv(GdalAlgorithm):
INPUT = 'INPUT'
TRANSF = 'TRANSF'
SRC_CRS = 'SRC_CRS'
DST_CRS = 'DST_CRS'
ZONE = 'ZONE'
OUTPUT = 'OUTPUT'
def __init__(self):
super().__init__()
def name(self):
return 'aurastertransformgda'
def displayName(self):
return '[AU] GDA94 to GDA2020 Direct and inverse Raster Transformation'
def group(self):
return '[AU] Australia'
def groupId(self):
return 'australia'
def tags(self):
return 'raster,grid,ntv2,direct,inverse,australia'.split(',')
def shortHelpString(self):
return 'Direct and inverse raster transformations using Australia NTv2 grids.'
def icon(self):
return QIcon(os.path.join(pluginPath, 'icons', 'au.png'))
def initAlgorithm(self, config=None):
self.directions = ['Direct: Old CRS -> New CRS',
'Inverse: New CRS -> Old CRS'
]
self.src_datums = (('GDA94 MGA [EPSG:283XX] (Conformal only)', '283'),
('GDA94 Latitude and Longitude [EPSG:4283] (Conformal only)', '4283'),
('GDA94 MGA [EPSG:283XX] (Conformal and Distortion)', '283cd'),
('GDA94 Latitude and Longitude [EPSG:4283] (Conformal and Distortion)', '4283cd'),
)
self.dst_datums = (('GDA2020 MGA [EPSG:78XX]', 78),
('GDA2020 Latitude and Longitude [EPSG:7844]', 7844),
)
self.zones = ['n/a',
'49',
'50',
'51',
'52',
'53',
'54',
'55',
'56']
self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT,
'Input raster'))
self.addParameter(QgsProcessingParameterEnum(self.TRANSF,
'Transformation',
options=self.directions,
defaultValue=0))
self.addParameter(QgsProcessingParameterEnum(self.SRC_CRS,
'Old CRS',
options=[i[0] for i in self.src_datums],
defaultValue=0))
self.addParameter(QgsProcessingParameterEnum(self.DST_CRS,
'New CRS',
options=[i[0] for i in self.dst_datums],
defaultValue=0))
self.addParameter(QgsProcessingParameterEnum(self.ZONE,
'UTM Zone',
options=self.zones,
defaultValue=0))
self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT,
'Output'))
def getConsoleCommands(self, parameters, context, feedback, executing=True):
inLayer = self.parameterAsRasterLayer(parameters, self.INPUT, context)
if inLayer is None:
raise QgsProcessingException(self.invalidRasterError(parameters, self.INPUT))
outFile = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
self.setOutputValue(self.OUTPUT, outFile)
direction = self.parameterAsEnum(parameters, self.TRANSF, context)
src_crs = self.src_datums[self.parameterAsEnum(parameters, self.SRC_CRS, context)][1]
dst_crs = self.dst_datums[self.parameterAsEnum(parameters, self.DST_CRS, context)][1]
v = self.parameterAsEnum(parameters, self.ZONE, context)
zone = '' if v == 0 else self.zones[v]
old, new = au_transformation_gda(src_crs, dst_crs, zone)
arguments = []
if direction == 0:
# Direct transformation
arguments.append('-s_srs')
arguments.append(old[0])
arguments.append('-t_srs')
arguments.append(new[0])
else:
# Inverse transformation
arguments = ['-s_srs']
arguments.append(new[0])
arguments.append('-t_srs')
arguments.append(old[0])
arguments.append('-multi')
arguments.append('-of')
arguments.append(QgsRasterFileWriter.driverForExtension(os.path.splitext(outFile)[1]))
arguments.append(inLayer.source())
arguments.append(outFile)
arguments.append('&&')
arguments.append('gdal_edit.py')
arguments.append('-a_srs')
if direction == 0:
arguments.append(new[1])
else:
arguments.append(old[1])
arguments.append(outFile)
if not os.path.isfile(os.path.join(pluginPath, 'grids', 'GDA94_GDA2020_conformal.gsb')):
urlretrieve('http://www.naturalgis.pt/downloads/ntv2grids/au/GDA94_GDA2020_conformal.gsb', os.path.join(pluginPath, 'grids', 'GDA94_GDA2020_conformal.gsb'))
urlretrieve('http://www.naturalgis.pt/downloads/ntv2grids/au/GDA94_GDA2020_conformal_and_distortion.gsb', os.path.join(pluginPath, 'grids', 'GDA94_GDA2020_conformal_and_distortion.gsb'))
return ['gdalwarp', GdalUtils.escapeAndJoin(arguments)]