[gdal-dev] Trimble 33_3ITRF to WKT and proj4

[Kai-Christian Bruhn]

Dear list-members,

I'm not really sure, whether this is the right place, but I saw several 
discussions of converting from WKT to proj4 etc. on this list, so I hope 
you could provide valuable info's

Since months I'm struggling with results of a GNSS-survey in Turkey. The 
data made available to me are in a projection called 33_3ITRF by 
Trimble. The parameters
Datum: ITRF (Molodensky)
Geoid: EGM96 (Global)
Projection: Transverse - Mercator
Central Meridian: 33°00'00''E
False Easting: 5000000
Scale: 1

Now I want to start working on these data in a clean open OSGEO 
environment and I'm looking for valid wkt and proj4 descriptions of this 
coordinate system. A project-partner provided a .prj-file (which was 
successfully used for testing transformations in an ESRI-environment, I 
guess).
Using the http://prj2epsg.org tool, I get the following WKT:

PROJCS["UnknownSystem",GEOGCS["GCS_ITRF_1996",DATUM["D_ITRF_1996",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Gauss_Kruger"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",33.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]] 


which does not pass testepsg-validation (from the FWTools) complaining 
about the 'Transverse Mercator' string. 'tmerc' doesn't work also.

Am I on the complete wrong track? How would a valid WKT and proj4 string 
look like? Is there an EPSG-Code for the 33_3ITRF-System?

Cheers

Kai