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I am using mapnik to generate local maps. This works fine for the 'normal' projections, such as 900913.
But when rendering tiles in UTM, i face strange behaviors: the map seems to break some regions (see attached image). I have already searched and found the description of similar problems for UTM rendering, but following the instructions (setting the extent Paramter) did not really help.
These errors only occur when rendering tiles (using the generate_tiles.py script); generating a single image (generate_image.py) works fine...
Am I missing the point?
As you see, some tiles seem to be shifted (like the "da" in "Drogheda")
This is what we did:
setup under windows: complete from the scratch, incl. PostgreSQL 9.1, PostGIS 1.5, Python 2.7, proj4