[Tilecache] Multiple WMS servers

[Christopher Schmidt]

On Mon, Apr 13, 2009 at 05:16:52PM +0000, Gissur Þórhallsson wrote:
> I'm running under mod_python.
> The problem is that the request handler throws me a error like the layer is
> not defined, say for example the layer part of my URL request is like
> 
> http://localhost/tc/tilecache.py?LAYERS=layer1,layer2[...more WMS
> parameters]
> 
> I get an error message that reads:
> 
> An error occurred: The requested layer (layer1,layer2) does not exist.
> Available layers are:
>  * layer1
>  * layer2
> 
> So it seem the tilecache server doesn't support multiple layers, or if
> it does it doesn't recognize the comma as a separator.

It does in trunk / 2.10. Are you using the latest release? 

> It would simplify things a whole lot if I would not have to set up a
> separate tilecache instance or mapserver so I would love is this could
> be resolved.
> 
> Kind regards from Iceland,
> 
> Gissur
> 
> 
> 2009/4/9 Tibor Arpas <tibor at infinit.sk>
> 
> > Hi,
> >
> > we were able to merge GDAL and WMS layer using your approach (third layer)
> > with no problem. But we only used tilecache_seed.py for the third layer
> > (against a different server instance). I didn't try to use on the fly
> > serving of the third layer because of the loop-back :-). But shouldn't the
> > loop back work also OK if you can restrict the external concurrent requests
> > to one third of what the tilecache instance can handle? (Each external
> > request can generate up to two child request towards the same instance.) I
> > guess it also depends on your deployment. What's your deployment
> > (standalone/mod_python)? And what's the behavior/error messages?
> >
> > Tibor
> >
> >
> >
> >
> >
> >
> > 2009/4/6 Gissur Þórhallsson <gissur at loftmyndir.is>
> >
> >>  Hi guys,
> >> I'm wondering whether anybody had tackled having multiple WMS servers as
> >> sources for a single tilecache layer?
> >>
> >> I have two WM servers (one for raster data and another for vector data)
> >> which I want to merge into a single tilecache layer. I thought about
> >> creating a different tc layer for each and then creating a third one that
> >> uses the other two as sources(making the poor tilecache loop-back on
> >> itself), but I can't get it working.
> >>
> >> Does anybody have any ideas I could try?
> >>
> >> Kind regards from Iceland,
> >> Gissur Þórhallsson
> >>
> >> _______________________________________________
> >> Tilecache mailing list
> >> Tilecache at openlayers.org
> >> http://openlayers.org/mailman/listinfo/tilecache
> >>
> >>
> >

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-- 
Christopher Schmidt
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