[OpenLayers-Users] changes in wms between 2.4 and 2.6

[Joanne Cook]

Hi Chris,

Sorry for the delay in responding to this- but it didn't make any difference:
http://mapdata.thehumanjourney.net/index_26.html
now includes the reproject option. 

So, to make sure I understand- do I now need to use the spherical mercator option when overlaying on virtual earth, google et al even if all my data is served in EPSG 4326?

Thanks

Jo

-----------------------------------------------------
Joanne Cook
Information Systems Coordinator
Oxford Archaeology (North)
01524 880212
http://thehumanjourney.net

----- Original Message -----
From: "Christopher Schmidt" <crschmidt at metacarta.com>
To: "Joanne Cook" <j.cook at oxfordarch.co.uk>
Cc: users at openlayers.org
Sent: 22 April 2008 17:23:29 o'clock (GMT) Europe/London
Subject: Re: [OpenLayers-Users] changes in wms between 2.4 and 2.6

On Tue, Apr 22, 2008 at 05:14:20PM +0100, Joanne Cook wrote:
> Hi all,
> 
> I am wondering if there have been any changes in the way wms is handled between openlayers 2.4 and 2.6. I went to upgrade my site from one to the other, and found that my wms layers display in a different location, when all I've changed is the line that says to look in folder Openlayers-2.6 rather than 2.4 for the javascript.(I even downloaded a clean copy of 2.4 to check it wasn't any changes I had made). 
> 
> It looks like a projection issue- you can see the difference if you look at the following:
> 
> http://mapdata.thehumanjourney.net uses 2.4
> http://mapdata.thehumanjourney.net/index_26.html uses 2.6
> 
> If you zoom in far enough to engage the wfs, then sites are in the correct location in both versions of the map.
> 
> Can anyone help me with this- or give me an idea how to debug it?

In 2.5, we turned the default 'reproject' option on WMS layers to
'false', because it offers a false sense of success in overlaying raster
layers of different projections which isn't really accurate.

Setting reproject: true should fix this issue for use now, but you
should really at some point look into using SphericalMercator:
http://crschmidt.net/~crschmidt/spherical_mercator.html explains some of
the how.

Regards,
-- 
Christopher Schmidt
MetaCarta




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