[Tilecache] tilecache with different epsg

Christopher Schmidt crschmidt at metacarta.com
Thu Jun 14 07:07:13 EDT 2007

On Thu, Jun 14, 2007 at 10:49:44AM +0100, Jerry O'Sullivan wrote:
> Hi,
> I have downloaded tilecache and got it working through IIS with the sample
> index.html caching data from metacarta.
> I am trying to use my own geoserver data and I am only getting pink tiles.
> What could the problem be? I can get the tiles fine through regular OL but
> not via Tilecache?

Neither OpenLayers nor TileCache is configured correctly. OpenLayers is
missing any kind of 'maxResolution' or other resolution-setting option,
and TileCache is missing maxresolution and bbox. 

"The most important thing to do is to ensure that the OpenLayers Layer
has the same resolutions and bounding box as your TileCache layer. You
can define the resolutions in OpenLayers via the 'resolutions' option or
the 'maxResolution' option on the layer. The maxExtent should be defined
to match the bbox parameter of the TileCache layer."  --

-- Chris

> Tilecache.cfg extract
> [Ireland]
> type=WMSLayer
> url=
> srs=EPSG:29903
> layers=topp:Counties_region
> OpenLayers Code
> map = new OpenLayers.Map( 'map',{maxExtent: new OpenLayers.Bounds(0, 0,
> 450000, 450000),units:'meters', projection:"EPSG:29903" } );
> layer = new OpenLayers.Layer.WMS( "VMap0", "tilecache.cgi?", {layers:
> 'Ireland', format: 'image/png'}, {projection:"EPSG:29903" } );
> map.addLayer(layer);

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Christopher Schmidt

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