Thank you very much - problem solved. There was an indeed an old version of libgdal around (gdal1.5.2 - also self-compiled under /usr/local/lib)
The strange thing is that the svn trunk version reports as older (libgdal.so.1.12.0) even if it is newer than gdal1.5.2, which reports as libgdal.so.1.12.2 Thanks again for the hint, Andreas > Andreas Neumann wrote: >> Hi, >> >> I was compiling gdal with python support from svn-trunk and ran into the >> same problem as described at >> >> http://www.nabble.com/Problem-with-gdal_polygonize.py-td19839558.html >> >> When I start a python script I get the following error message: >> >> ------------------ >> gdal_merge.py -o orthofoto_2008.tif -init 255,255,255 -v -co >> "COMPRESS=PACKBITS" -of GTiff OF_10cm/69*.tif >> Traceback (most recent call last): >> File "/usr/local/bin/gdal_merge.py", line 31, in <module> >> import gdal >> File "/usr/local/lib/python2.5/site-packages/gdal.py", line 2, in >> <module> >> from osgeo.gdal import deprecation_warn >> File "/usr/local/lib/python2.5/site-packages/osgeo/gdal.py", line 7, >> in >> <module> >> import _gdal >> ImportError: /usr/local/lib/python2.5/site-packages/osgeo/_gdal.so: >> undefined symbol: GDALPolygonize >> ------------------ >> >> My system is Ubuntu 8.10 (Intrepid Ibex). I used the following configure >> options: > > Andreas, > > My guess would be that the GDAL Python bindings are ending up running > against an older libgdal.so. Is it possible that you have a > /usr/lib/libgdal.so that is 1.5.x and getting picked up instead of > /usr/local/lib/libgdal.so? > > Best regards, > -- > ---------------------------------------+-------------------------------------- > I set the clouds in motion - turn up | Frank Warmerdam, > [EMAIL PROTECTED] > light and sound - activate the windows | http://pobox.com/~warmerdam > and watch the world go round - Rush | Geospatial Programmer for Rent > > -- Andreas Neumann Böschacherstrasse 6, CH-8624 Grüt/Gossau, Switzerland Email: [EMAIL PROTECTED], Web: * http://www.carto.net/ (Carto and SVG resources) * http://www.carto.net/neumann/ (personal page) * http://www.svgopen.org/ (SVG Open Conference) * http://www.geofoto.ch/ (Georeferenced Photos of Switzerland) _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev