Hey-
Linde Ackermans wrote:
> Hi all,
>
> I defined my layers with OpenLayers.TileCache
>
> f.i.
> var l1= new OpenLayers.Layer.TileCache("xxx",
> ["http://xx.xx.xx.xx/tilecache/cache/";,
> "l1",
> {scales: Scales, resolutions: Resolutions,
> buffer:0, format:"image/png", isBaseLayer:false},
> );
>
> Say I have a base layer l0, extent = europe.
> I want to overlay l1, but this layer only contains detailed information on
> capital cities, on a very high scale.
> I do not want to make a cache for layer l1 for the whole extent of the base
> layer ( would be too much ), but only for a few selected rectangles.
> How can I do this ? How can I show "nothing" for tiles not found ? ( Or an
> empty tile which is transparent ? )
The default behavior is to turn tiles pink if no image is returned.
OpenLayers.Util.onImageLoadErrorColor = "pink";
If your service doesn't return an image in certain areas and you want
those to be transparent in the client, use the following:
OpenLayers.Util.onImageLoadErrorColor = "transparent";
(Set this property before you set your map center.)
Tim
> Thanks for any help.
> Linde
>
--
Tim Schaub
OpenGeo - http://opengeo.org
Expert service straight from the developers.
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