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Is there any C# library which can take a shapefile as an input with projection information defined (e.g, EPSG 3011) and return a new shapefile with user specified projection (e.g, EPSG 4326) ?

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GDAL/OGR has C# bindings. You might want to check it out. Alternatively, you might also want to check dotspatial. The dotspatial page has sample code on reprojecting a shape file.

You can do this in ogr ( It's provided in the FWTools package ). No need to code in C#.

ogr2ogr -s_srs EPSG:3011 -t_srs EPSG:4326 outfile.shp infile.shp

Thanks @iant for pointing it out.

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OK! is there any piece of code you may know, which could take shapefile as an input ? – user1899 Feb 8 '12 at 13:40
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ogr2ogr will do this – iant♦ Feb 8 '12 at 14:19
@user1899 Why does it have to be a C# library btw? – R.K. Feb 8 '12 at 15:02
As i understand it is command line tool, But I need to change shapefile projection within my web C# application code. How I use ogr2ogr in my C# code? – user1899 Feb 8 '12 at 17:00
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@user1899 Use the C# bindings for that. – R.K. Feb 9 '12 at 2:52

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