Chris --

I passed the resolutions array to TileCache but I get pink tiles when the layer 
is turned on outside the boundaries of the resolutions array. The layer does 
render properly when zoomed in at the supported resolution. My units are 
decimal degrees, and my TileCache layer looks like so.

I'm scratching my head on this one...

[testlayer]
type=WMSLayer
url=http://gis.test.com/cgi-bin/dir/test_wms.cgi
transparent=true
extension=png
layers=1
resolutions=0.00034332275390625,0.000171661376953125,0.0000858306884765625,0.00004291534423828125

Regards,

Frank


-----Original Message-----
From: Christopher Schmidt <[EMAIL PROTECTED]>
Sent: Tue, September 4, 2007 12:22 pm
To: [EMAIL PROTECTED]
Cc: [email protected]
Subject: Re: [OpenLayers-Dev] Scale dependencies with TileCache

On Tue, Sep 04, 2007 at 12:05:28PM -0400, [EMAIL PROTECTED] wrote:
> Hello --
> 
> I was interested in creating a cached layer with scale dependencies using 
> TileCache. The layer configuration using just OpenLayers works fine and is 
> shown below. However I want to cache this layer and have tileCache only 
> request tiles from within the minScale and maxScale parameters. Is this 
> possible?

TileCache needs to be handed a list of resolutions. It's not clear to me
what your units, maxExtent, etc. are. You should set your TileCache
layer up to have the *resolutions of the base layer* which exist between
those scales.

OpenLayers.Util.getResolutionFromScale may be useful.

Regards,
-- 
Christopher Schmidt
MetaCarta

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