[OpenLayers-Dev] GeoWebCache layer
Iván Sánchez Ortega
ivan at sanchezortega.es
Mon Nov 22 17:39:27 EST 2010
Hi all,
I'm working in a project that involves running GeoServer+GeoWebCache to
generate a whole bunch of tiles, then copying all the unmodified cached tiles
to a frontend., then put openlayers on top.
The trick is that GWC's way of naming cached tiles looks like this:
EPSG_$projection_$namespace_$layer_08/05_04/0161_0146.png
Here, 08 is z, 0161 is x, and 0146 is y. But the zero-padding and that
mid-level directory prevents us from using XYZ or TMS.
Worry no more! The brand-new GWC layer allows to load a mirrored copy of GWC's
tile cache with no hassle, even accounting for GWC's bugs! Looky here:
http://ivan.sanchezortega.es/GWC.js
Usage is pretty straightforward:
var gwc = new OpenLayers.Layer.GWC({});
gwc.url = "path_to_cache_dir/EPSG_12345_namespace_layer_";
gwc.type = 'png';
gwc.name = "foobar"
map.addLayer(gwc);
Best,
--
----------------------------------
Iván Sánchez Ortega <ivan at sanchezortega.es> <ivan at geonerd.org>
http://ivan.sanchezortega.es
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