[gdal-dev] Odd things after using ogr2ogr

[Kai Behncke]

Dear users:

I did it in the following way: With gdalwarp I projected an air image to 31467.
With ogr2ogr I transformed a shape from 4326 to 31467.

To have a comparison I transformed my data also with ArcGIS.

Then I loaded the data (in Quantum GIS and in ArcGIS)- everything looked fine, so I have got what I want.
Furthermore I compared with other already projected geodata, everything wonderfull!


Then I loaded the original-shape file (4326) in Quantum GIS and made on the fly
 a projection of these data to 31467 - and then the skip occured.

You can see the result in the following image:
http://www.selbstverwaltung-bundesweit.de/test/loesung.PNG

(selektion_roads are the original data (4326) projected to 31467 in Q-GIS,
selektion_roads_31467 transformed with fwtools).

However, with the air image and selektion_roads_31467 I have got what I wanted.

Best regards, Kai
-------- Original-Nachricht --------
> Datum: Thu, 23 Oct 2008 11:01:29 +0200
> Von: "Kai Behncke" <Kai-Behncke at gmx.de>
> An: Frank Warmerdam <warmerdam at pobox.com>, gdal-dev at lists.osgeo.org
> Betreff: Re: [gdal-dev] Odd things after using ogr2ogr

> Dear Frank,
> 
> thank you for that hint.
> 
> > I imagine there is an issue with how the datum shifting is being done.
> > It looks to me that by default EPSG:31467 does not have datum shift
> > parameters supplied with it (as expected by GDAL/OGR).
> 
> Is there a possibility to put this datum shift parameters manually?
> 
> > Even if they are the same version, I would suspect that one way there
> > are proper datum shift parameters being used, and the other way there
> > are not.
> 
> In which way there are proper datum shift parametes used?
> 
> Thank you very much again, Kai
> 
> -- 
> GMX Kostenlose Spiele: Einfach online spielen und Spaß haben mit Pastry
> Passion!
> http://games.entertainment.gmx.net/de/entertainment/games/free/puzzle/6169196
> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev

-- 
Ist Ihr Browser Vista-kompatibel? Jetzt die neuesten 
Browser-Versionen downloaden: http://www.gmx.net/de/go/browser