[Tilecache] WMS getMap interface

[Josh Livni]

I am not aware of any WMS servers that let you query (via WMS) for an image
of arbitrary extent, and use tiles (local or remote) as source data.
The only thing I've personally come across that seems like it might fill the
bill is ws-compose (part of modest maps codebase).  With ws-compose.py
running as a service, you can basically give it some arbitrary extent and
image size and a service provider for the tiles, and it will get the
appropriate tiles and stitch them together.

You may want to take a look at the branch that is within
http://github.com/mikelmaron/paperwalking for a version that has some
ability to pass in service provider info via the url request (tho not using
wms syntax).  This version also lets you stack different providers' tiles on
top of eachother (kinda like cascading wms).

 -Josh


On Tue, Sep 15, 2009 at 7:39 AM, Simone Gadenz <gadenz at gmail.com> wrote:

> Hello!
>
> I am looking for a WMS server that can consume a TC cache and provide
> images of an arbitrary extent.
>
> According to the documentation each tile can be called using a WMS syntax.
> For the short test I have done there is no possibility of calling images
> with an arbitrary extent through that interface.
>
> I found GDAL has a minidriver for accessing WMS-C caches but again for the
> test it seems it works only for accessing a single tile. I might be wrong
> since i did not understand fully the configuration.
>
> Going to the point, I would like to understand how hard would be to
> implement a WMS getmap interface into the TileCache, and in case what is the
> best strategy. I saw a WMS.py under the service folder. is thet the right
> point to start?
>
> Thanks
>
> S
>
>
>
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