[Fwd: Re: [Qgis-user] Projection not recognised EPSG:31259]

[Roland Kaiser]

Werner-

prj files generated by ERSI products generally lack TOWGS parameters
(see EPSG:1618, CoordinateTransformation, http://www.epsg-registry.org).
Maybe this is solved in ARCGIS 9.3.

As Albin suggested you can try to use this prj file.

PROJCS["Austria_MGI_M34",GEOGCS["GCS_MGI",DATUM["D_MGI",SPHEROID 
["Bessel_1841",6377397.155,299.1528128],TOWGS84 
[577.326,90.129,463.919,5.137,1.474,5.297,2.4232]],PRIMEM["Greenwich", 
0.0],UNIT["Degree",0.0174532925199433]],PROJECTION 
["Transverse_Mercator"],PARAMETER["False_Easting", 750000.0],PARAMETER 
["False_Northing",-5000000.0],PARAMETER["Central_Meridian", 
16.33333333333334],PARAMETER["Scale_Factor",1.0],PARAMETER 
["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

A recent version of proj4 will have EPSG:31259 including towgs
parameters, at least on my system (Mac OS X).

GDAL 1.6.0, released 2008/12/04
PROJ.4, Rel. 4.6.1, 21 August 2008

+init=epsg:31259 +proj=tmerc +lat_0=0 +lon_0=16.33333333333333
+k=1 +x_0=750000 +y_0=-5000000 +ellps=bessel
+towgs84=577.326,90.129,463.919,5.137,1.474,5.297,2.4232 +units=m
+no_defs

Hope this helps.

Roland

BTW, don't trust prj files delivered by Austrian Government!



> Thx for your answers!
> But .. I assume a delivered projection file as correct - and you  
> did not say that government fails or the projection is wrong ..
> The provided .prj from you are really nice - but i guess in fact it  
> does not solve the problem.
> I just wanted to know where the problem is to investigate it..
> Are the .prj files wrong?
> does gdal/ogr something strange?
> is qgis acting wrong?
>
> so wheres the real problem behind this all?
>
> thx for your hints
> regards
> Werner
>> Hello,
>>
>> I had also problems with ESRI-generated .prj - Files for Austria  
>> (in my
>> case M31) - I solved it by manually editing the .prj - File  
>> respectively
>> using those I have attached...
>>
>> See also the following page: http://www.alectoria.at/content/view/ 
>> 17/1/
>>
>> HTH,
>>
>> Albin
>
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