Yes, I've always found the background color setting odd with the  
OGCServer, but I assume that is it simply matching the WMS spec.

To get the standard OSM background color, you need to send the HEX  
color in the Query string, but replace the '#' with '0x', so something  
like:

BGCOLOR=0xb5d0d0

Also note the additional variable you can send of TRANSPARENT=<bool>

Lastly, keep in mind that although the OGGServer is a bit buried in  
the Mapnik code base, it simply a few python scripts and you should  
(as others should) feel free to peek inside and provide patches for  
additional functionality:

http://trac.mapnik.org/browser/trunk/bindings/python/mapnik/ogcserver

Dane


On Nov 7, 2009, at 1:06 AM, John Mitchell wrote:

> Hi,
>
> I have been using the Mapnik OGC server to display open street map  
> data and it looks identical to tiles that I generated via  
> generate_tiles.py except that the background instead of the being  
> blue is white.  I noticed in the osm.xml that near the top of the  
> file it has the below line:
> <Map bgcolor="#b5d0d0" srs="+proj=merc +a=6378137 +b=6378137  
> +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m  
> +nadgri...@null +no_defs +over">
>
> This sets the background color which is used by generate_tiles.py  
> but not for a WMS request when LAYERS=__all__.
> Also I noticed that the land at world and medium scales are a very  
> lite pink instead of being white but that may just be the contrast  
> with the white background instead of the blue background.
>
> John
>
> -- 
> John J. Mitchell
> _______________________________________________
> Mapnik-users mailing list
> [email protected]
> https://lists.berlios.de/mailman/listinfo/mapnik-users

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