Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bionet!ames!eos!eugene
From: eugene@eos.UUCP (Eugene Miya)
Newsgroups: comp.graphics
Subject: Re: Computerized maps
Message-ID: <3867@eos.UUCP>
Date: 5 Jun 89 20:24:42 GMT
References: <2645@portia.Stanford.EDU> <11982@well.UUCP>
Reply-To: eugene@eos.UUCP (Eugene Miya)
Organization: NASA Ames Research Center, Calif.
Lines: 26

In article <11982@well.UUCP> nagle@well.UUCP (John Nagle) writes:
>
>      Highly accurate digital roadmaps with detailed house-numbering data
>are produced by
> . . .
>
>      This is high-quality data, with the primary sources being USGS maps
>and aerial photographs.  It's not just rehashed commercial roadmap data.

Sorry, but for some reason "Highly" accurate and "high"-quality
don't jib with USGS or aerial photos.  I saw another follow up on thse cost.
That's the key.  The USGS maps have quality, but you don't build houses
on their low resolution.  The point is that different qualities are used
for different purposes.  Aerial photos have numerous problems to
prevent them from ever being used as maps.  You only need look in the
yellow pages under aerial surveys, and surveyors to see that maps
with vertical resolutions to feet and even inches are made all the time.

Another gross generalization from

--eugene miya, NASA Ames Research Center, eugene@aurora.arc.nasa.gov
  resident cynic at the Rock of Ages Home for Retired Hackers:
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