kamap background tiles

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kamap background tiles

David Percy
Hi, we have a site we're working on to search for geologic maps
based on the extent that the user has zoomed to.

I have a kamap tiled backend from which I am only pulling the group
__base__. Unfortunately, this means that the background color doesn't
get drawn, and since we were relying on the background color to be blue
to show water, all water bodies are now transparent ;-)

I could obviously come up with several hacks around this (including one
large -180 -90 180 90 polygon in a shapefile colored blue), but I'd
rather spend my time understanding the kamap tiling mechanism.

Thanks for any light you may be able to shed upon this,

PS sorry for the cross-posting, but in this case it seemed proper.

David Percy
Geospatial Data Manager
Geology Department
Portland State University
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