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I have a shape file with nature preservation areas (Biosphärenreservate) in Germany. I think the projection must be something like gauss-krüger zone 4 Pulkovo or something like that. When I reproject it to UTM-33N WGS84 it reprojects but is not exactly accurate. The borders don't quite match my other shape (the other file)

Could anyone here help me with that problem. That would be nice!

best regards desputin

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Are you sure the projection of the other file is ok? – johanvdw May 18 '12 at 8:56
You may want to mark some of the answers to questions you've asked as "accepted", otherwise you might find you get fewer answers in the future. – MerseyViking May 18 '12 at 8:57
Thanks for the advice. I don't see a "accept" button anywhere. (who created this stackexchange anyway? Half the time here has to be spent with burocracy!) – desputin May 18 '12 at 9:07
No I'm not 100% sure the biosphärenreservate are projected correctly. – desputin May 18 '12 at 9:15
accept button is here - – vinayan May 18 '12 at 9:32
up vote 6 down vote accepted

Opening up biosph-res-2010.prj in a text editor, I get:


So you were almost right - I get the (apparently deprecated) DHDN / 3-degree Gauss zone 3 (EPSG:31463)

What I think your problem is, is not one of projection, but of digitization and simplification. Overlaying biosph-res-2010 (red) and gebiet_UTM33 (blue) on Google aerial imagery gives me this:

enter image description here

So your biosphärenreservate line matches the coast quite closely, but the blue line has far fewer points, and isn't shifted by a uniform amount. So the quality of your data is questionable rather than your projection.

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Thank you very much! – desputin May 18 '12 at 13:56

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