Hello,
I have recently upgraded from GDAL 1.9.2 to GDAL 1.11.0. With this upgrade,
I've experienced difficulties in extracting the projection definition from the
swisstopo dataset
(http://www.swisstopo.admin.ch/internet/swisstopo/en/home/products/height/swissALTI3D/swissALTI3D.html).
In GDAL-1.9.2, running gdalinfo on the lv95 GeoTIFF, 2m data returns the
following Coordinate System:
PROJCS["Hotine Oblique Mercator Azimuth Center",
GEOGCS["CH1903+ (L+T1997)",
DATUM["CH1903+ (L+T1997)",
SPHEROID["Bessel",6377397.155,299.1528131060786],
TOWGS84[674.374,15.056,405.346,0,0,0,0]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]],
PROJECTION["Hotine_Oblique_Mercator_Azimuth_Center"],
PARAMETER["latitude_of_center",46.95240555555557],
PARAMETER["longitude_of_center",7.439583333333334],
PARAMETER["azimuth",90.00000000000003],
PARAMETER["scale_factor",1],
PARAMETER["false_easting",2600000],
PARAMETER["false_northing",1200000],
UNIT["meters",1]]
However in GDAL-1.11.0, gdalinfo on the same file returns the following
(truncated) WKT for the Coordinate System:
PROJCS["Hotine Oblique Mercator Azimuth Center",
GEOGCS["CH1903+ (L+T1997)",
DATUM["CH1903+ (L+T1997)",
SPHEROID["Bessel",6377397.155,299.1528131060786],
TOWGS84[674.374,15.056,405.346,0,0,0,0]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]],
UNIT["meters",1]]
Notice that PROJECTION and related PARAMETER fields are missing in the WKT.
I've run gdalinfo from GDAL-1.10.0 and 1.10.1 with results identical to
GDAL-1.11.0. I suspect that the issue lies with the fact that the coordinate
system is defined using ESRI WKT.
Is it possible in 1.11.0 to obtain a complete Projection WKT from
GDALGetProjectionRef() that would include the
PROJECTION["Hotine_Oblique_Mercator_Azimuth_Center"] in order to construct a
OGRSpatialReference from the ESRI WKT?
Thanks in advance,
Alex
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