[OpenLayers-Users] Projection and extent confusion

[Christopher Schmidt]

On Thu, Jun 18, 2009 at 11:33:25AM -0400, Alexandre.Laplante at statcan.gc.ca wrote:
> Hello everyone,
> 
> I am confused about how projections and extent work in openlayers. I
> have map data that is in EPSG:42304. I have not changed any projection
> or extent settings in openlayers. When I try to view my data with
> openlayers, the map comes out upsidedown and squeezed.
> 
> I'm using mapserver, and when I go to this address:
> http://localhost/cgi-bin/mapserv.exe?map=../test/service/alex.map&servic
> e=WMS&version=1.1.1&layer=gcar&SRS=EPSG:42304&mode=map
> the map renders properly. But when I try to view it with default
> settings in openlayers, it comes out wrong.
> 
> My question is, do I have to let openlayers know what is the projection
> and extent of my data, and if so, how?

Yes.

 http://faq.openlayers.org/map/how-do-i-set-a-different-projection-on-my-map/

Regards,
-- 
Christopher Schmidt
MetaCarta