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osr_pm.py
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#!/usr/bin/env python
###############################################################################
# $Id$
#
# Project: GDAL/OGR Test Suite
# Purpose: Test some prime meridian related issues with EPSG translation
# and evaluation by PROJ.4.
# Author: Frank Warmerdam <[email protected]>
#
###############################################################################
# Copyright (c) 2003, Frank Warmerdam <[email protected]>
#
# 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.
###############################################################################
import sys
sys.path.append('../pymod')
import gdaltest
from osgeo import osr
###############################################################################
# Check that EPSG:27572 lookup has the prime meridian properly set,
# and the central meridian.
def osr_pm_1():
srs = osr.SpatialReference()
srs.ImportFromEPSG(27572)
if abs(float(srs.GetAttrValue('PRIMEM', 1)) - 2.33722917) > 0.0000005:
gdaltest.post_reason('Wrong prime meridian.')
return 'fail'
if abs(srs.GetProjParm(osr.SRS_PP_CENTRAL_MERIDIAN) - 0.0) > 0.0000005:
gdaltest.post_reason('Wrong central meridian.')
return 'fail'
return 'success'
###############################################################################
# Check that EPSG:27572 lookup has the prime meridian properly set,
# and the central meridian in the PROJ.4 string.
def osr_pm_2():
srs = osr.SpatialReference()
srs.ImportFromEPSG(27572)
proj4_srs = srs.ExportToProj4()
if proj4_srs.find('+pm=paris') == -1:
print(proj4_srs)
gdaltest.post_reason('prime meridian wrong or missing.')
return 'fail'
if proj4_srs.find('+lon_0=0') == -1:
print(proj4_srs)
gdaltest.post_reason('+lon_0 is wrong.')
return 'fail'
return 'success'
###############################################################################
# Convert PROJ.4 format to WKT and verify that PM and central meridian
# are properly preserved.
def osr_pm_3():
srs = osr.SpatialReference()
srs.ImportFromProj4('+proj=utm +zone=30 +datum=WGS84 +pm=bogota')
if abs(float(srs.GetAttrValue('PRIMEM', 1)) + 74.08091666678081) > 0.0000005:
gdaltest.post_reason('Wrong prime meridian.')
return 'fail'
if abs(srs.GetProjParm(osr.SRS_PP_CENTRAL_MERIDIAN) + 3.0) > 0.0000005:
gdaltest.post_reason('Wrong central meridian.')
return 'fail'
return 'success'
###############################################################################
gdaltest_list = [
osr_pm_1,
osr_pm_2,
osr_pm_3,
None]
if __name__ == '__main__':
gdaltest.setup_run('osr_pm')
gdaltest.run_tests(gdaltest_list)
gdaltest.summarize()