On Fri, Feb 15, 2013 at 6:02 PM, Gede Mátyás <[email protected]> wrote:
> Dear Gavin,
>
> the problem is probably the difference of the datum shift parameters
> between
> PostGIS and GeoServer transformations.
>
The TOWGS84 parameters GeoServer is picking from the official EPSG database
are indeed
quite different, evething else seems pretty much the same:
PROJCS["Minna / UTM zone 31N",
GEOGCS["Minna",
DATUM["Minna",
SPHEROID["Clarke 1880 (RGS)", 6378249.145, 293.465,
AUTHORITY["EPSG","7012"]],
TOWGS84[-111.92, -87.85, 114.5, 1.875, 0.202, 0.219, 0.032],
AUTHORITY["EPSG","6263"]],
PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]],
UNIT["degree", 0.017453292519943295],
AXIS["Geodetic longitude", EAST],
AXIS["Geodetic latitude", NORTH],
AUTHORITY["EPSG","4263"]],
PROJECTION["Transverse_Mercator", AUTHORITY["EPSG","9807"]],
PARAMETER["central_meridian", 3.0],
PARAMETER["latitude_of_origin", 0.0],
PARAMETER["scale_factor", 0.9996],
PARAMETER["false_easting", 500000.0],
PARAMETER["false_northing", 0.0],
UNIT["m", 1.0],
AXIS["Easting", EAST],
AXIS["Northing", NORTH],
AUTHORITY["EPSG","26331"]]
Still... 5km offset along the north axis seems like a lot
Cheers
Andrea
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