Hi, I'm wondering what is done differently on the (a|b| c).tile.openstreetmap.org server compared to my own installation, regarding world boundaries & coastlines & especially lakes on high (larger scale) zoom levels.
Below is a few links to screenshots detailing what I mean, the tile on the left is created by my installation of OSM + Mapnik + mod_tile + rendered , the tile on the right is the same tile from OSM server (http://a.tile.openstreetmap.org/6/37/18.png ) My setup is using data downloaded recently (osm.xml , mapnik, world_boundaries, processed_p, Planet.osm) and osm.xml has not been customized for the first two example images (other than paths & database logins). Files have been downloaded from the places described at http://wiki.openstreetmap.org/index.php/Mapnik Why is my version of the map lacking lots of detail (the big lake, coastline detail, scattered little bodies of water) that is visible in the osm generated image? http://xe.nic.fi/~xenic/tile_problem.png If I zoom in enough, I do eventually get the lake visible in my rendering (again left is my installation, right is tile.osm.org): http://xe.nic.fi/~xenic/tile_zoomed.png Now, I tried fiddling with osm.xml to view processed_p (the more detailed information that does contain the lake) data on higher zoom levels, but I end up with a nasty grid covering the image: <Style name="coast-poly"> <Rule> <MaxScaleDenominator>2500000000</MaxScaleDenominator> <PolygonSymbolizer> <CssParameter name="fill">#f2efe9</CssParameter> </PolygonSymbolizer> </Rule> </Style> results in this: http://xe.nic.fi/~xenic/tile_grid.png the visible Grid seems to be made up of actual lines within the data, as changing the style to: <Style name="coast-poly"> <Rule> <MaxScaleDenominator>2500000000</MaxScaleDenominator> <PolygonSymbolizer> <CssParameter name="fill">#f2efe9</CssParameter> </PolygonSymbolizer> <LineSymbolizer> <CssParameter name="stroke">black</CssParameter> <CssParameter name="stroke-width">0.2</CssParameter> </LineSymbolizer> </Rule> </Style> results in this: http://xe.nic.fi/~xenic/tile_grid_black.png The same effect can also be seen at (for example) http://www.opencyclemap.org/ , If you zoom into a global view of Finland and then change the Base Layer from the top-right corner to something else than OSM Cycle Map the various lakes disappear. Any help / ideas to get the Mapnik rendering to match that of OpenStreetMap.org would be appreciated. Cheers, Xenic _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
