EPSG:4326 is the code for the WGS84 coordinate reference system. OpenStreetMap tiles are rendered using the Spherical Mercator coordinate reference system (EPSG:900913 )so in order to use longitude/latitude coordinates with a Spherical Mercator map they must first be reprojected to Spherical Mercator coordinates.
There's a good description of this on the OSM website: http://docs.openlayers.org/library/spherical_mercator.html Cheers Adam On 14/08/2010, at 2:44 AM, Leonardo Gaona wrote: > What are the projections EPSG: 4326 ?? > and why we must transform from EPSG: 4326 to EPSG:900913 when we use osm maps > _______________________________________________ > Dev mailing list > Dev@openlayers.org > http://openlayers.org/mailman/listinfo/dev _______________________________________________ Dev mailing list Dev@openlayers.org http://openlayers.org/mailman/listinfo/dev
