Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!apple!motcsd!hpda!hpcuhb!hpcllla!hpclisp!chip
From: chip@hpclisp.HP.COM (Chip Chapin)
Newsgroups: comp.graphics
Subject: Re: Are you interested in Computer Mapping Systems?
Message-ID: <610001@hpclisp.HP.COM>
Date: 12 Sep 89 02:05:38 GMT
References: <1883@scicom.AlphaCDC.COM>
Organization: Hewlett-Packard Calif. Language Lab
Lines: 39

>/ hpclisp:comp.graphics / neil@calvin.ksu.ksu.edu (Neil Erdwien) /  4:04 pm  Sep  8, 1989 /
>In article <3282@wasatch.utah.edu> thomson%cs.utah.edu@wasatch.utah.edu (Rich Thomson) writes:
>>In article <5050@eos.UUCP> eugene@eos.UUCP (Eugene Miya) writes:
>>>There already is a mailing list.  I've received mail from it already,
>>>but the traffic is very low, so low, I don't have the current address.
>>
>>Are you sure you're not mis-remembering the comp-vis list?  I manage that
>>...

Well, judging from the number of requests for "map databases" and such,
I think there is a lot of interest in digital cartography, or geography
or whatever-graphy.  And not just from genuine geography jocks, but also
from interested hackers such as myself.  I finally got a chance to plot
DEM data on my workstation, and I'm stoked!  I want more!

But let's keep the discussion in comp.graphics -- there is *not* enough
traffic to warrant creation of a new group.

First [elementary] discussion question:  I have a program that plots DEM
data as successive planes from "back" to front.  I am considering
changing it to plot successive rows of quadrilaterals so as to form a
true "surface".  Then I'd like to shade them appropriately.

My question is... Seems like all this must be well-understood, with some
established algorithms (I *hate* re-inventing the wheel). I'm not a real
graphics weenie anyway.  Could someone please point me in the direction
of some good texts or papers on this subject?  

Thanks!

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Chip Chapin, HP California Language Lab (HP/CBO/NSS/CSG/DLD/LMO/CLL)
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