[OpenLayers-Dev] Projection

[Adam Ratcliffe]

Yes quite right,  I hadn't had my morning coffee when I wrote that ;)

On 14/08/2010, at 9:25 AM, <christopher.schmidt at nokia.com> wrote:

> 
> 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 at openlayers.org
>>> http://openlayers.org/mailman/listinfo/dev
>> 
>> _______________________________________________
>> Dev mailing list
>> Dev at openlayers.org
>> http://openlayers.org/mailman/listinfo/dev
>