El día Thursday 10 June 2010 09:49:01, Stefano Moratto dijo: > I use GDAL to download tiles (jpeg) from OpenstreetMap and to compose a > bitmap of the area that is being viewed. The resulting bitmap (not > compressed) is warped and displayed.
Hhhhmmm. Personally, I think you're doing it wrong. If you really need speed for custom reprojections of OSM data, the best thing to do is to render the data locally with Mapnik. i.e.: - Download a planet file - Put it in PostGIS via osm2pgsql - Configure Mapnik to use the projection you need - Use Mapnik to get the desired area rendered You might incur in a speed penalty due to the rendering itself, but you guarantee that there will be no artifacts due to the image warping. And also, you might get a boost by reprojecting the vector data inside PostGIS so Mapnik doesn't have to reproject it on-the-fly. I realise that setting Mapnik is quite a lot of work at first, but it's an idea that is worth considering in your case. Cheers, -- Iván Sánchez Ortega <[email protected]> Un ordenador no es una televisión ni un microondas: es una herramienta compleja. _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
