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#!/usr/bin/env python
#******************************************************************************
# $Id: epsg_tr.py 19102 2010-03-15 23:41:44Z warmerdam $
#
# Project: LOS/LAS to NTv2 Translator
# Purpose: Translate one or many LOS/LAS sets into an NTv2 datum shift grid
# file.
# Author: Frank Warmerdam, warmerdam@pobox.com
# Financial Support: i-cubed (http://www.i-cubed.com)
#
#******************************************************************************
# Copyright (c) 2010, Frank Warmerdam
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
#******************************************************************************
from osgeo import osr
from osgeo import gdal
import sys
import string
# dummy object to hold options
class Options:
pass
# =============================================================================
def Usage():
print('Usage: loslas2ntv2.py [-a] [-auto] [-sub_name name] [-parent name]' )
print(' [-created date] [-updated date] [-gs_type name]')
print(' [-system_f name] [-system_t name] [-version version]')
print(' [-major_f axis] [-minor_f axis]')
print(' [-major_t axis] [-minor_t axis]')
print(' [-negate] [src_file.los]* dst_file.gsb ')
print('')
print(' -a: append to existing NTv2 file.')
print(' -auto: process a whole directory of nad27/hpgn los/las files.')
print(' -negate: reverse direction of change.')
print('')
print('eg.')
print(' loslas2ntv2.py -auto *.los' )
print(' loslas2ntv2.py -system_f NAD27 -system_t NAD83 -sub_name conus conus.los conus.gsb')
sys.exit(1)
# =============================================================================
def TranslateLOSLAS( los, ntv2_filename, options ):
# Open the LOS and LAS files.
los_filename = los[:-4] + '.los'
las_filename = los[:-4] + '.las'
los_db = gdal.Open( los_filename )
las_db = gdal.Open( las_filename )
# Create (or append to) the NTv2 file.
create_options = options.create_options
if options.append == 1:
create_options.append( 'APPEND_SUBDATASET=YES' )
ntv2_driver = gdal.GetDriverByName('NTv2')
ntv2_db = ntv2_driver.Create( ntv2_filename,
los_db.RasterXSize, los_db.RasterYSize,
4, gdal.GDT_Float32, create_options )
# Copy georeferencing
ntv2_db.SetGeoTransform( los_db.GetGeoTransform() )
# Copy offsets.
data = las_db.ReadAsArray()
if options.negate:
data = -1 * data
ntv2_db.GetRasterBand(1).WriteArray(data)
data = los_db.ReadAsArray()
if options.negate:
data = -1 * data
ntv2_db.GetRasterBand(2).WriteArray(data)
if len(options.metadata) > 0:
ntv2_db.SetMetadata( options.metadata)
# =============================================================================
# Auto-process the normal NOAA director of los/las files, producing a
# NAD27 NTv2 file, and an HPGN NTv2 file.
def auto_noaa( options, loslas_list ):
options.append = 0
options.verbose_flag = 0
original_metadata = options.metadata
have_nad27 = 0
have_hpgn = 0
for los in loslas_list:
options.create_options = []
options.metadata = original_metadata
if los.find('hpgn') != -1:
ntv2_filename = los[:-4]+'.gsb'
options.append = 0
options.negate = 1
options.metadata.append( 'SUB_NAME=' + los[:2] )
options.metadata.append( 'MAJOR_F=6378137.0' )
options.metadata.append( 'MINOR_F=6356752.31414' )
options.metadata.append( 'MAJOR_T=6378137.0' )
options.metadata.append( 'MINOR_T=6356752.31414' )
options.metadata.append( 'SYSTEM_F=HARN' )
options.metadata.append( 'SYSTEM_T=NAD83' )
else:
ntv2_filename = 'nad27_usa.gsb'
options.metadata.append( 'SUB_NAME=' + los[:-4] )
if have_nad27 == 0:
options.append = 0
options.metadata.append( 'MAJOR_F=6378206.4' )
options.metadata.append( 'MINOR_F=6356583.8' )
options.metadata.append( 'MAJOR_T=6378137.0' )
options.metadata.append( 'MINOR_T=6356752.31414' )
options.metadata.append( 'SYSTEM_F=NAD27' )
options.metadata.append( 'SYSTEM_T=NAD83' )
else:
options.append = 1
have_nad27 = 1
print 'Integrate %s into %s.' % (los, ntv2_filename)
TranslateLOSLAS( los, ntv2_filename, options )
sys.exit(0)
# =============================================================================
if __name__ == '__main__':
ntv2_filename = None
loslas_list = []
auto_flag = 0
options = Options()
options.verbose_flag = 0
options.append = 0
options.create_options = []
options.metadata = []
options.negate = 0
argv = gdal.GeneralCmdLineProcessor( sys.argv )
if argv is None:
sys.exit( 0 )
# Parse command line arguments.
i = 1
while i < len(argv):
arg = argv[i]
if arg == '-v':
options.verbose_flag = 1
elif arg == '-version' and i < len(argv)-1:
options.metadata.append( 'VERSION='+argv[i+1] )
i = i+1
elif arg == '-created' and i < len(argv)-1:
options.metadata.append( 'CREATED='+argv[i+1] )
i = i+1
elif arg == '-updated' and i < len(argv)-1:
options.metadata.append( 'UPDATED='+argv[i+1] )
i = i+1
elif arg == '-system_f' and i < len(argv)-1:
options.metadata.append( 'SYSTEM_F='+argv[i+1] )
i = i+1
elif arg == '-system_t' and i < len(argv)-1:
options.metadata.append( 'SYSTEM_T='+argv[i+1] )
i = i+1
elif arg == '-parent' and i < len(argv)-1:
options.metadata.append( 'PARENT='+argv[i+1] )
i = i+1
elif arg == '-sub_name' and i < len(argv)-1:
options.metadata.append( 'SUB_NAME='+argv[i+1] )
i = i+1
elif arg == '-gs_type' and i < len(argv)-1:
options.metadata.append( 'GS_TYPE='+argv[i+1] )
i = i+1
elif arg == '-major_f' and i < len(argv)-1:
options.metadata.append( 'MAJOR_F='+argv[i+1] )
i = i+1
elif arg == '-minor_f' and i < len(argv)-1:
options.metadata.append( 'MINOR_F='+argv[i+1] )
i = i+1
elif arg == '-major_t' and i < len(argv)-1:
options.metadata.append( 'MAJOR_T='+argv[i+1] )
i = i+1
elif arg == '-minor_t' and i < len(argv)-1:
options.metadata.append( 'MINOR_T='+argv[i+1] )
i = i+1
elif arg == '-negate':
options.negate = 1
elif arg == '-auto':
auto_flag = 1
elif arg == '-a':
options.append = 1
elif arg[0] == '-':
Usage()
elif arg[-4:] == '.los' or arg[-4:] == '.las':
loslas_list.append( arg )
elif arg[-4:] == '.gsb' and ntv2_filename is None:
ntv2_filename = arg
else:
print('Unrecognised argument: ', arg)
Usage()
i = i + 1
if len(loslas_list) == 0:
print('No .los/.las files specified as input.')
Usage()
if auto_flag == 1:
auto_noaa( options, loslas_list )
if ntv2_filename is None:
print('No NTv2 file specified.')
Usage()
# Process loslas files.
for los in loslas_list:
TranslateLOSLAS( los, ntv2_filename, options )
options.append = 1
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