[udig-devel] A problem with a geotiff CRS

[Silvia Franceschi]

Hi Andrea,
provided that I am not an expert of projections and gdal I think you 
have something wrong in the geotif.
I tried using the gdalinfo and the results of the projection is:

 PROJCS["ED50 / UTM zone 33N",
    GEOGCS["ED50",
        DATUM["European_Datum_1950",
            SPHEROID["International 1924",6378388,297.000000000005,
                AUTHORITY["EPSG","7022"]],
            AUTHORITY["EPSG","6230"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4230"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",15],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","23033"]]

If you use udig and the crs tool the same projection have this description:

PROJCS["ED50 / UTM zone 33N",
  GEOGCS["ED50",
    DATUM["European_Datum_1950",
      SPHEROID["International 1924", 6378388.0, 297.0,
    AUTHORITY["EPSG","7022"]],
      AUTHORITY["EPSG","6230"]],
    PRIMEM["Greenwich", 0.0,
    AUTHORITY["EPSG","8901"]],
    UNIT["degree", 0.017453292519943295],
    AXIS["Lon", EAST],
    AXIS["Lat", NORTH],
    AUTHORITY["EPSG","4230"]],
  PROJECTION["Transverse_Mercator"],
  PARAMETER["central_meridian", 15.0],
  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["x", EAST],
  AXIS["y", NORTH],
  AUTHORITY["EPSG","23033"]]

The two look quite similar but with some differences, maybe some of the 
developers can explain us if this could be a problem and what of the 
differences is the real problem... or maybe this is not the reason of 
the error...
At that point really I don't know what it could be.

Ciao

Silvia




iomeneandrei wrote:
> Hi Silvia,
> I have added a .prj file and I have the some result. 
> I'm attaching the geotiff and prj files. Could you make a test?
>
>
> Silvia Franceschi-2 wrote:
>   
>> Hi Andrea,
>> although it is a geotiff, did you try to add a .prj file with the same 
>> name of your tiff and that extension?
>>
>>     
>
> http://www.nabble.com/file/p17531016/DEM3.zip DEM3.zip 
>
> Then udig does not read the crs info inside a pure geotiff?
>
> Ciao e grazie,
>
> a
>
> -----
> Andrea Borruso
>
> ----------------------------------------------------
> email: aborruso at tin.it
> blog: http://blog.spaziogis.it
> ----------------------------------------------------
>