Thanks Christopher. I tried to set up the service with the configuration you suggested but i should have set the wrong parameters as it returns back only one tile stretched accordingly to the dimension or errors. But I am using a projected reference system and it is also strange that, having a square geographic extent, I cannot have only one single tile at the level 0 of the cache but a 2 by 2 tiles structure. Can be this the main problem? I tryes to set up the following parameters <br>
<br><TileCountX>2</TileCountX><br><TileCountY>2</TileCountY><br><br>but I have back errors.<br><br>Is there any place i can read a description of the parameters?<br><br>Cheers<br><br>Simone<br><br>
<div class="gmail_quote">2009/9/15 Christopher Schmidt <span dir="ltr"><<a href="mailto:crschmidt@metacarta.com">crschmidt@metacarta.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">On Tue, Sep 15, 2009 at 04:39:00PM +0200, Simone Gadenz wrote:<br>
> Hello!<br>
><br>
> I am looking for a WMS server that can consume a TC cache and provide images<br>
> of an arbitrary extent.<br>
><br>
> According to the documentation each tile can be called using a WMS syntax.<br>
> For the short test I have done there is no possibility of calling images<br>
> with an arbitrary extent through that interface.<br>
><br>
> I found GDAL has a minidriver for accessing WMS-C caches but again for the<br>
> test it seems it works only for accessing a single tile. I might be wrong<br>
> since i did not understand fully the configuration.<br>
<br>
</div>This should work. Did you try one of the example configurations?<br>
<br>
<a href="http://gdal.org/frmt_wms_metacarta_wmsc.xml" target="_blank">http://gdal.org/frmt_wms_metacarta_wmsc.xml</a><br>
<br>
As a RASTER type datasource in MapServer should let you request any WMS<br>
extent and have it fill the data using the TileCache backend. (Oh,<br>
but that WMS service is down, so that doesn't really let you demonstrate;<br>
but still, if you have an EPSG:4326 map, that file shoudl be easy to adapt).<br>
I'll try and get that server back up later today or tomorrow morning.<br>
<div class="im"><br>
> Going to the point, I would like to understand how hard would be to<br>
> implement a WMS getmap interface into the TileCache, and in case what is the<br>
> best strategy. I saw a WMS.py under the service folder. is thet the right<br>
> point to start?<br>
<br>
</div>Possibly, but I am not in favor of adding image mosaicing to TileCache;<br>
I think you would be best to try to get GDAL+MapServer working rather<br>
than changing the way TileCache works in this way.<br>
<br>
(There are, I believe, at least 3 different files called WMS.py.)<br>
<br>
Changing this would require changing a significant amoutn of core<br>
infrastructure of TileCache to accomodate for this use case.<br>
<br>
REgards,<br>
<font color="#888888">--<br>
Christopher Schmidt<br>
MetaCarta<br>
</font></blockquote></div><br>