[OpenLayers-Users] change projection layer dynamically

[Roald de Wit]

Hi Toni,

OpenLayers cannot combine WMS layers with different projections nor can 
it easily switch projections, certainly not on the fly based on the 
region you are viewing!
What I advise you to do is the following if you have no control over 
these WMS servers and cannot have them serve all images in one 
projection: have MapServer act as a reprojecting proxy for you. 
MapServer can act as a WMS client and reproject the imagery into the 
projection you want. This page describes how to do this: [1].

If you need more assistance with setting up or configuring MapServer I 
advise you to ask their mailing list.

I hope this helps.

Regards, Roald

[1] http://mapserver.org/ogc/wms_client.html

toni hernández wrote:
> hi,
>
> I have a map that gets some WMS layers from two different servers all 
> over spain.
>
> There is one wms server that needs a concrete epsg parameter (23029, 
> 23030 or 23031) depending on the zone of spain. This server does not 
> accept epsg:4326.
>
> So dependig on the zone of the map that is being displaid I need to 
> change the WMS layer projection.
> is this possible?
>
>