[OpenLayers-Users] Is it possible to completely change the projection of a Map?

[Christopher Schmidt]

On Mon, May 07, 2007 at 12:01:47PM +0100, Nick Whitelegg wrote:
> Hello everyone,
> 
> As part of an OpenStreetMap editing application I'm doing, I would like to be 
> able to replace not only the layers but also the projection of the base map. 
> The application is a point-of-interest editor for OpenStreetMap, it allows 
> users to use the OpenLayers Vector layer to trace the outlines of lakes and 
> woods and also add POIs like hill summits. I want users to be able to switch 
> between two base layers.
> 
> The two base layers comprise Freemap (OpenStreetMap rendering client) which is 
> projected in Mercator, and the New Popular Edition (old Ordnance Survey maps 
> of the UK) which has the OSGB36 projection.

Add the projection properties to each layer. Layers inherit their
projection from the map, but if they're different, then when you switch
layers, the projection will change.

Regards,
-- 
Christopher Schmidt
MetaCarta