[Tilecache] Problem with using Tilecache on top of WMS

[Christopher Schmidt]

On Wed, Sep 23, 2009 at 12:36:16PM -0600, Scott Lewis wrote:
> I'm just starting to learn TileCache, and I think I have it installed 
> correctly.  However, I'm running into a problem when I try to use it.
> 
> 
> When I run the following URL directly, I get the map of Greenland that I 
> want:
> 
> http://nsidc.org/cgi-bin/nsidc_ogc_north.pl?LAYERS=blue_marble_07&
> FORMAT=image%2Fjpeg&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&
> STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A3408&
> BBOX=-3000000,-3000000,0,0&WIDTH=256&HEIGHT=256
> 
> 
> However, When I try to call my TileCache script, it doesn't.  Here's the 
> URL to the TileCache script (note that it's not available externally as 
> it's on a development system):
> 
> http://DEVELOPMENT_SERVER_NAME/cgi-bin/tilecache/tilecache.cgi?
> LAYERS=north_greenland2&FORMAT=image%2Fjpeg&SERVICE=WMS&VERSION=1.1.1&
> REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&
> SRS=EPSG%3A3408&BBOX=-3000000,-3000000,0,0&WIDTH=256&HEIGHT=256
> 
> 
> Here is the definition in the tilecache.cfg file for [north_greenland]
> 
> [north_greenland]
> type=WMS
> layers=blue_marble_07
> url=http://nsidc.org/cgi-bin/nsidc_ogc_north.pl
> extension=jpeg
> bbox=-3000000,-3000000,0,0

You don't have an SRS defined, so TileCache is using the default (4326).
Set srs=EPSG:3408

-- Chris

> 
> Calling the WMS directly results in the image being created.  The 
> TileCache call, however, just generates a blank, blue image.
> 
> 
> I looked in the error logs and didn't see anything indicating something 
> was amiss there.
> 
> 
> Any thoughts or suggestions on what may be the problem?
> 
> 
> Scott Lewis
> National Snow and Ice Data Center
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-- 
Christopher Schmidt
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