dbwr wrote:
> Having trouble finding free DRG maps to download to enhance my height-field
> renders.
> The few that google finds aren't free, and I realize not all cool sites will
> be found by google spiders. Mine wasn't.  Any links appreciated.

This page has a couple of links:

http://library.humboldt.edu/~rls/geospatial/topomaps.htm

Extract from that page:

Digital Raster Graphics (DRGs)
...
DRGs can be purchased from USGS and other commercial sources. In 
addition they can be downloaded for free from a number of sites 
including the GIS Data Depot and the California Spatial Information 
Library (California only). See the Mostly Free DRG Reference Page for 
additonal sites.
...

The GIS Data Depot:
   http://data.geocomm.com/

Mostly Free DRG Reference Page
   http://www.dragonbbs.com/members/1117/drg.html


This Google search will return some threads that might be interesting:

http://tinyurl.com/28vy5
http://groups.google.com/groups?q=DRG+%28%22no+cost%22+OR+free%29+%28map+OR+maps%29

It seems that the sci.geo.satellite-nav newsgroup would be
a proper place to ask more about such maps:

http://groups.google.com/groups?group=sci.geo.satellite-nav


-- 
Tor Olav
http://subcube.com
http://subcube.net

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