[GRASS-dev] GRASS - UDig projection definitions

[Andrea Antonello]

Thanks Moritz,
this also means that there is no easy way (something like parse that and
that and then create the WTK), the proj pack has to be there, right?

Andrea



Moritz Lennert probaly wrote:
> 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
>