[GRASS-user] GeoTIFF, EPSG and GRASS

[Adrien ANDRÉ]

Hi!

with GDAL i use EPSG:2972 to reproject any new raster i'm lead to work with.

gdalinfo says:

Coordinate System is:
PROJCS["RGFG95 / UTM zone 22N",
    GEOGCS["RGFG95",
        DATUM["Reseau_Geodesique_Francais_Guyane_1995",
            SPHEROID["GRS 1980",6378137,298.2572221010002,
                AUTHORITY["EPSG","7019"]],
            TOWGS84[0,0,0,0,0,0,0],
            AUTHORITY["EPSG","6624"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4624"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-51],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","2972"]]

I've created the GRASS location from this same code, and all imports are
successful.

After exporting, the gdalinfo output is different:

Coordinate System is:
PROJCS["UTM Zone 22, Northern Hemisphere",
    GEOGCS["grs80",
        DATUM["unknown",
            SPHEROID["Geodetic_Reference_System_1980", 6378137,
298.257222101]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-51],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]]]

The PROJCS has lost its AUTHORITY parameter.
Would someone know why this happens? Is there a way to fix this?

Thanks in advance,

regards,

Adrien
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