<html><head><title>Re: [gdal-dev] transformation with nadgrids</title>
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<span style=" font-family:'Courier New'; font-size: 9pt;">Ralf,<br>
<br>
I did not expect it to be that simple ;-). I was expecting problems with the direction of the HeTA-grid and therefore didn't give it a try.<br>
<br>
Thanks a lot<br>
<br>
Wolfgang<br>
<br>
<br>
<br>
Monday, December 13, 2010, 12:47:07 PM, you wrote:<br>
<br>
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<td width=904><span style=" font-family:'courier new'; font-size: 13pt;">Hi Wolfgang,<br>
is gdalwarp/ogr2ogr -t_srs "+proj=tmerc +lat_0=0 +lon_0=9 +k=1.000000 +x_0=3500000 +y_0=0 +ellps=bessel +units=m +nadgrids=./HeTa2010.gsb +wktext" -s_srs "+proj=utm +zone=32 +ellps=GRS80 +datum=WGS84 +units=m" ... not working for you?<br>
The default EPSG:25832 can also be written as <span style=" color: #181615;">"+proj=tmerc +lat_0=0 +lon_0=9 +k=0.9996 +x_0=500000 +y_0=0 +ellps=<span style=" color: #000000;">WGS84<span style=" color: #181615;"> +units=m +<span style=" color: #000000;">wktext"<br>
Gr<br>
Ralf<br>
Am Montag 13 Dezember 2010, 12:07:51 schrieb Wolfgang Lahr:<br>
> Hello list,<br>
> <br>
> I am using GDAL/OGR to transform raster and vector data from German<br>
> Gauss-Krueger (DHDN) to ETRS/UTM like so:<br>
> <br>
> gdalwarp/ogr2ogr -s_srs "+proj=tmerc +lat_0=0 +lon_0=9 +k=1.000000<br>
> +x_0=3500000 +y_0=0 +ellps=bessel +units=m +nadgrids=./HeTa2010.gsb<br>
> +wktext" -t_srs "+proj=utm +zone=32 +ellps=GRS80 +datum=WGS84 +units=m"<br>
> ...<br>
> <br>
> This works very well (Kudos to Frank and co-developers!!).<br>
> <br>
> Now, the question came up, how to do it just the other way round, ie from<br>
> ETRS/UTM to Gauss-Krueger (DHDN) using the same grid.<br>
> <br>
> Any hints?<br>
> <br>
> Regards and thanks<br>
> <br>
> Wolfgang<br>
> <br>
> _______________________________________________<br>
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> gdal-dev@lists.osgeo.org<br>
> http://lists.osgeo.org/mailman/listinfo/gdal-dev</td>
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<span style=" font-family:'arial'; color: #c0c0c0;"><i>-- <br>
mit freundlichem Gruß,<br>
Wolfgang Lahr<br>
<br>
Dr. Wolfgang Lahr<br>
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