-------- Original Message --------
Subject: Allen SD Map Artifact
Date: Sat, 06 Oct 2007 08:23:08 -0600
From: Mike Flannigan <[log in to unmask]>
To: Maps, Air Photo & Geospatial Systems Forum <[log in to unmask]>
The 1981 "Allen" South Dakota 1:50,000 scale topo has
an interesting artifact, or stretch-compress error on it
just SE of Allen, SD. The error is located near
431537N1014945W. I see that it is corrected on
more current versions of the map.
I only mention it here to see if anybody has an explanation
as to why this error is made in rare instances. It appears
to be a digital processing error of some kind.
If you would like to see the error I am talking about, see
this file located here:
http://home.earthlink.net/~mikeflan/allen.jpg
Mike Flannigan