On Fri, 01 Mar 2002 10:08:25 -0500, Timothy R. Cook wrote:
> Ron Parker wrote:
>> If you're really set on using the topo lines, you can get them in vector
>> format from the USGS website without all of the extraneous data.
> 
> Oooh.  Must look into.
> 
> ...what's wrong with topo data?  It's realistic, and definitely good
> enough for general terrain appearance.

Nothing, really, except that DEM data is already rasterized and has a 
better vertical resolution.  These days, topo data is often derived from
DEM data.

-- 
#macro R(L P)sphere{L F}cylinder{L P F}#end#macro P(V)merge{R(z+a z)R(-z a-z)R(a
-z-z-z a+z)torus{1F clipped_by{plane{a 0}}}translate V}#end#macro Z(a F T)merge{
P(z+a)P(z-a)R(-z-z-x a)pigment{rgbf 1}hollow interior{media{emission 3-T}}}#end 
Z(-x-x.2x)camera{location z*-10rotate x*90normal{bumps.02scale.05}}

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