On Aug 13, 2010, at 5:21 PM, ext Adam Ratcliffe wrote: > 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
(Which is, of course, on the OpenLayers website.) -- Chris > 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 _______________________________________________ Dev mailing list Dev@openlayers.org http://openlayers.org/mailman/listinfo/dev
