Re: [geowebcache-users] out-of-phase tiles..

[Arne K. <ak...@op...>]

GeoWebCache ignores the tilesorigin parameter, so try setting your 
tilesorigin to -180.0,-90.0 ?

Rant:
It's a bit tricky, because the WMS-C recommendations don't mention this 
parameter at all, yet the Tile Grid Definition sort of implies it. To be 
honest, I don't understand the reasoning behind the tile grid 
definition, and I think it creates more problems than it solves.

It basically decides where the tile boundaries are based on the bounding 
box specified by the user who administrates the cache. These bounds can 
easily change, And once you set the tilesorigin you're pretty much 
locked. You have to stick to it for the lifetime of the data, and every 
client has to consider this parameter for every request. Sure, the 
clients could check the getCapabilities response, but that requires a 
lot of parsing and it's not obvious how often one has to do that.

So why not base it on the bounds of the projection instead?

GeoWebcache supports custom grid definitions, so you could change the 
grid so that it mimics the tilesorigin behavior, but I don't recommend it.

-Arne


Facundo Garat wrote:
> Hi,
>  i'm trying geowebcache with our application and the resulting tiles 
> are out-of-phase...
>
>  We were using our application against geoserver with no problem, 
> using metatiling (TILESORIGIN and TILED=true in the url request) and 
> everything is ok, but when i put geowebcache in the middle the tiles 
> get out-of-phase... any ideas that may help to find the problem?.
>
>   Right now, we use apache as a reverse proxy so the application 
> doesn't know if the request goes to a geoserver or geowebcache...
>
> thanks in advance,
> facu.- !DSPAM:4038,47f507a5108411096210785!
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