[Tilecache] Why is the bounding box/resolution from the original request not honored?

[Christopher Schmidt]

On Sun, Nov 09, 2008 at 12:36:09PM -0500, chris marx wrote:
> Hi,
>  I just got tilecache working on xp and win 2003, and with my wms (using
> manifold gis) the open layers example works great. However, I configured
> tilecache in the hopes of using it in conjunction with google maps. However,
> it appears that tilecache is not honoring the wms requests that are being
> generated from the script in google maps (see below). The requests are
> valid, if I point the script directly at the wms, the tiles come back just
> fine. But when i put tilecache in between, I get
> 
> An error occurred: Current y value 37.718590 is too far from tile
> corner y 37.968750
> 
> You can see the working google map with tiles coming back directly from the
> wms here:

You must use Spherical Mercator to overlay tiles on Google Maps. 

http://trac.openlayers.org/wiki/SphericalMercator


Regards,
-- 
Christopher Schmidt
MetaCarta