[Tilecache] KML Superoverlays in TileCache

[Christopher Schmidt]

On Mon, Jul 07, 2008 at 12:27:00PM -0600, Bruce Rindahl wrote:
> Sorry if this is too obvious but I am stuck..
> I have TileCache working perfectly to serve up my images in a web 
> application.  Now I want to be able to serve it up via KML as a 
> superoverlay.
> For example my imagery is setup as a WMS via mapserver. In my 
> tilecache.cfg file this is accessed via:
> 
> [naip]
> type=WMSLayer
> url=http://localhost/cgi-bin/mapserv.exe?map=h:/mapfiles/naip.map
> extension=png
> layers=naip
> srs=EPSG:26913
> bbox=139000,4094000,763000,4550000
> maxResolution=2048
> levels=12
> 
> A request such as:
> 
> http://localhost/tilecache/tilecache.py?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=naip&SRS=EPSG:26913&BBOX=515832,4388912,532216,4405296&width=256&height=256
> 
> works perfectly via TileCache. My map file is setup to reproject to 
> EPSG:4236 for KML.  My question is now what?  The example file 
> overlay.kml included with TileCache is:
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <kml xmlns="http://earth.google.com/kml/2.1">
>   <Folder>
>   <NetworkLink>
>     <Link>
>       
> <href>http://tile.openaerialmap.org/tiles/1.0.0/openaerialmap/0/0/0.kml</href>
>     </Link>
>   </NetworkLink>
>   <NetworkLink>
>     <Link>
>       
> <href>http://tile.openaerialmap.org/tiles/1.0.0/openaerialmap/0/1/0.kml</href>
>     </Link>
>   </NetworkLink>
>   </Folder>
> </kml>
> 
> 
> Do I need to create a starting directory sturcture like the one given in 
> the example file?  What do I need to do to the tilecache.cfg file?  Do I 
> need to alter the Apache http.conf file to include another tilecache 
> directory?  Any help would be appreciated.

Did you read the "SuperOverlays.txt" documentation that comes with
TileCache? http://tilecache.org/docs/SuperOverlays.html Some of these
questions are answered there.

 1. Set up an EPSG:4326 layer.
 2. The URLs in the format above are served by TileCache, in this case,
 under the URL 'tiles', by mod_python; you do'nt need to create anything
 on disk.

-- Chris 

> Thanks
> Bruce Rindahl
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-- 
Christopher Schmidt
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