Problem with using Tilecache on top of WMS

[Scott Lewis]

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


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-2]

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
> _______________________________________________
> Tilecache mailing list
> [hidden email]
> http://openlayers.org/mailman/listinfo/tilecache

--
Christopher Schmidt
MetaCarta
_______________________________________________
Tilecache mailing list
[hidden email]
http://openlayers.org/mailman/listinfo/tilecache

[Scott Lewis]

Thanks, that did indeed seem to be the problem.  I guess I thought that
since the SRS=EPSG%3A3408 was in the URL, that it would supplant it in
the TileCache.

I appreciate the help!

Christopher Schmidt wrote:

> 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
>> _______________________________________________
>> Tilecache mailing list
>> [hidden email]
>> http://openlayers.org/mailman/listinfo/tilecache
>

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