Hi, I stopped my trials with rendering OSM maps to epsg:2393 projection with Mapnik and generate_image.py utility. Instead, I have been trying to learn first how to make maps in default epsg:900913 projection. Unfortunately, however closely I try to follow the instructions I am always getting maps which have different east-west extents than I am giving as parameters in the generate_image.py script.
My environment: - Python 2.5 - Mapnik Windows binaries from: http://download.berlios.de/mapnik/mapnik_win32_py25-0.5.0.zip) - Generate_image.py downloaded from: http://svn.openstreetmap.org/applications/rendering/mapnik/generate_image.py) - OSM data downloaded from: http://download.geofabrik.de/osm/europe/finland.osm.bz2 - OSM data uploaded to PostGIS with osm2pgsql.exe (WIndows binaries) Upload done with options: osm2pgsql -d postgis -p osm_g -m finland.osm.bz2 - osm.xml downloades from: http://svn.openstreetmap.org/applications/rendering/mapnik/osm.xml In addition I have downloaded and installed symbol files, shoreline data and World boundaries as advised in: http://svn.openstreetmap.org/applications/rendering/mapnik/install.txt All I have changed are PostGIS database connection parameters and paths to shapefiles. The system works with all the layers and I can generate maps. The problem is that the resulting maps do not have the same extents as I give in the generate_image.py file as input parameters. For example, if I give these ll extents in generate_image.py: ll = (24.0,60.0,25.0,61.0) the resulting map actually covers this area: ll (23.4841,60.0,25.5117,61.0) I have taken the latter coordinates from Information Freeway coordinate display and verified them with GPS. I have repeated this test by different ll values dozens of times and the result is always the same. Latitude values in the resulting maps are the same I asked for, but not the longitude values. Is there anybody out there who could verify if there really is some faulty coordinate transformation used for converting longitudes or am I just doing something wrong? -Jukka Rahkonen- _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
