[GRASS-dev] GRASS - UDig projection definitions
Moritz Lennert
mlennert at club.worldonline.be
Mon Feb 12 08:10:03 EST 2007
On 12/02/07 13:58, Andrea Antonello wrote:
> Hi developers,
> I'm trying to make udig speak the same language as GRASS, but I found
> one main issue, I'm not able to resolve.
>
> GRASS and UDig use different projection definitions.
> - in Grass the projection file is something like:
> name: Transverse Mercator
> proj: tmerc
> datum: rome40
> towgs84: -225.000,-65.000,9.000
> a: 6378388
> es: 0.0067226700
> lat_0: 0
> lon_0: 9
> k: 0.999600
> x_0: 1500000
> y_0: 0
> no_defs: defined
>
> - whereas in UDig it is WKT:
> PROJCS["Monte Mario / Italy zone 1",
> GEOGCS["Monte Mario",
> DATUM["Monte_Mario",
> SPHEROID["International 1924", 6378388.0, 297.0,
> AUTHORITY["EPSG","7022"]],
> AUTHORITY["EPSG","6265"]],
> PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]],
> UNIT["degree", 0.017453292519943295],
> AXIS["Lon", EAST],
> AXIS["Lat", NORTH],
> AUTHORITY["EPSG","4265"]],
> PROJECTION["Transverse_Mercator"],
> PARAMETER["central_meridian", 9.0],
> PARAMETER["latitude_of_origin", 0.0],
> PARAMETER["scale_factor", 0.9996],
> PARAMETER["false_easting", 1500000.0],
> PARAMETER["false_northing", 0.0],
> UNIT["m", 1.0],
> AXIS["x", EAST],
> AXIS["y", NORTH],
> AUTHORITY["EPSG","3003"]]
>
> I'm no projection wizard, has anyone an idea about how I can go from one
> to the other and back in an easy way?
g.proj -w "Print projection information in WKT format"
Moritz
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