osr_usgs.py

#!/usr/bin/env pytest
###############################################################################
# $Id$
#
# Project:  GDAL/OGR Test Suite
# Purpose:  Test some USGS specific translation issues.
# Author:   Andrey Kiselev, dron@remotesensing.org
#
###############################################################################
# Copyright (c) 2004, Andrey Kiselev <dron@remotesensing.org>
#
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###############################################################################



from osgeo import gdal
from osgeo import osr
import pytest

###############################################################################
# Test the osr.SpatialReference.ImportFromUSGS() function.
#


def test_osr_usgs_1():

    srs = osr.SpatialReference()
    srs.ImportFromUSGS(
        8, 0,
        (0.0, 0.0,
         gdal.DecToPackedDMS(47.0), gdal.DecToPackedDMS(62.0),
         gdal.DecToPackedDMS(45.0), gdal.DecToPackedDMS(54.5),
         0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0),
        15)

    assert srs.GetProjParm(osr.SRS_PP_STANDARD_PARALLEL_1) == pytest.approx(47.0, abs=0.0000005) and srs.GetProjParm(osr.SRS_PP_STANDARD_PARALLEL_2) == pytest.approx(62.0, abs=0.0000005) and srs.GetProjParm(osr.SRS_PP_LATITUDE_OF_CENTER) == pytest.approx(54.5, abs=0.0000005) and srs.GetProjParm(osr.SRS_PP_LONGITUDE_OF_CENTER) == pytest.approx(45.0, abs=0.0000005) and srs.GetProjParm(osr.SRS_PP_FALSE_EASTING) == pytest.approx(0.0, abs=0.0000005) and srs.GetProjParm(osr.SRS_PP_FALSE_NORTHING) == pytest.approx(0.0, abs=0.0000005), \
        'Can not import Equidistant Conic projection.'

###############################################################################
# Test the osr.SpatialReference.ExportToUSGS() function.
#


def test_osr_usgs_2():

    srs = osr.SpatialReference()
    srs.ImportFromWkt("""PROJCS["unnamed",GEOGCS["NAD27",\
    DATUM["North_American_Datum_1927",\
    SPHEROID["Clarke 1866",6378206.4,294.9786982139006,\
    AUTHORITY["EPSG","7008"]],AUTHORITY["EPSG","6267"]],\
    PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433],\
    AUTHORITY["EPSG","4267"]],PROJECTION["Lambert_Conformal_Conic_2SP"],\
    PARAMETER["standard_parallel_1",33.90363402777778],\
    PARAMETER["standard_parallel_2",33.62529002777778],\
    PARAMETER["latitude_of_origin",33.76446202777777],\
    PARAMETER["central_meridian",-117.4745428888889],\
    PARAMETER["false_easting",0],PARAMETER["false_northing",0],\
    UNIT["metre",1,AUTHORITY["EPSG","9001"]]]""")

    (proj_code, _, params, datum_code) = srs.ExportToUSGS()

    assert proj_code == 4 and datum_code == 0 and gdal.PackedDMSToDec(params[2]) == pytest.approx(33.90363403, abs=0.0000005) and gdal.PackedDMSToDec(params[3]) == pytest.approx(33.62529003, abs=0.0000005) and gdal.PackedDMSToDec(params[4]) == pytest.approx(-117.4745429, abs=0.0000005) and gdal.PackedDMSToDec(params[5]) == pytest.approx(33.76446203, abs=0.0000005), \
        'Can not import Lambert Conformal Conic projection.'