On Tue, Nov 25, 2008 at 09:30:35AM -0500, Alexandre Leroux wrote:
>
> Hi list,
>
> I have a rather simple question about the state of WMS tile caching. The
> wiki pages content is mostly one or two years old now:
> http://wiki.osgeo.org/wiki/WMS_Tile_Caching
> http://wiki.osgeo.org/wiki/WMS_Tiling_Client_Recommendation
>
> I took a look at
> http://www.tilecache.org/ and
> http://geowebcache.org/trac
> but wasn't able to confidently answer my question.
>
> Can WMS tiles be cached by the server for any WMS client and still serve
> WMS according to the standard?
TileCache does not support this. However, what some people (including
myself) have done is:
* Set up a Layer to be served via WMS (GeoServer, for example)
* Set up a TileCache in front of it
* Set up a MapServer in front of it, using GDAL's WMS-C support:
http://gdal.org/frmt_wms.html
Then, a request from a client like OpenLayers can go directly to the
TileCache, while a request from a 'normal' WMS client can go to the
MapServer layer which pulls from the cache.
However, I would not recommend this technique if you expect heavy load
-- the restriction of tilecache to not do stitching is somewhat
intentional. (Enough people complain about it being slow without ading
in intentional slowdowns!)
Regards,
--
Christopher Schmidt
Web Developer
_______________________________________________
Discuss mailing list
Discuss@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/discuss
