[Qgis-user] problems to transform gk2 ->etrs

[Bernhard Ströbl]

Hallo Jan,

the x-coordinate of your result is a valid ETRS89 coordinate, the 
y-coordinate is valid, too, however there is a shift to the south of 
some 300 metres compared to EPSG31466.
AFAIK Proj4 settings for EPSG25832 does not carry any datum information 
so no datum shift is performed.

Maybe you should use the BETA2007 grid 
http://crs.bkg.bund.de/crseu/crs/descrtrans/BeTA/de_dhdn2etrs_beta.php 
(German)

Will send you my findings on EPSG31468 (GK4) to ETRS89 using cs2cs in a PM.

Bernhard

Am 22.06.2012 14:11, schrieb Jan Tappenbeck:
> Hi !
>
> my job is to transform images form gk2 (EPSG:31466) to etrs89 zone 32N
> (EPSG 25832) and i start following command by the qgis-gdal dialog:
>
> gdalwarp -s_srs EPSG:31466 -t_srs EPSG:25832 -of GTiff
> E:/jan_testauswertungen/xxxx_test/Luftbild/rgb/675735.tif
> E:/jan_testauswertungen/xxxx_test/Luftbild/rgb/test_wordfile.tif
>
> but the result image is on a wrong position - look into the world-files:
>
> source:
> 0.0500000000
> 0.0000000000
> 0.0000000000
> -0.0500000000
> 2567500.0249999999
> 5673999.9749999996
>
> target:
> 0.0499895212
> 0.0000000000
> 0.0000000000
> -0.0499895212
> 357801.5026061685
> 5673694.2809244990
>
> did anyone had a idea ?
>
> regards Jan :-)
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>


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