[Tilecache] TMS question

[Guillaume Sueur]

Hi Chris,

I would expect TC to use the same grid as TMS in TMS mode, regardless to
Google. If Klokan mapTiler's grid is correct, north-east spain is 32,40
at zoom level 6. Tilecache TMS is giving 32,23 (like google), but not
with exactly the same extent (shifted towards south). 
Actually it is not the worst. I've got an OSM wgs cache over France, and
called from google earth with kml extension makes it go to Gulf of
Mexico... 
Another example : shouldn't tile 0/0/0.png cover the whole world ?

Regards

Guillaume


Le lundi 11 janvier 2010 à 13:33 -0500, Christopher Schmidt a écrit :
> On Mon, Jan 11, 2010 at 03:42:35PM +0100, Guillaume Sueur wrote:
> > Hi,
> > 
> > I'm wondering about the TMS grid used in TC. The request I see here
> > (http://labs.metacarta.com/wms-c/tilecache.py/1.0.0/basic/5/32/23.png)
> > doesn't match with what I see there
> > http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/
> > for that area (north-east spain). 
> > 
> > Actually, does TileCache follow a specific TMS grid ?
> 
> Not sure why you'd expect TMS and Google to be the same; Google is indexed
> from the top left corner, TMS from the bottom left.
> 
> Regards,