-------- Original Message --------
Subject: Re: Allen SD Map Artifact
Date: Mon, 8 Oct 2007 09:06:39 -0500
From: Dennis McClendon <[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
Is this on the actual paper map, or only apparent in the DRG?
DRGs are made by scanning paper maps, and this sort of error could
easily result if the map didn't feed through the scanner properly.
If you've seen it on the printed map, one prepared by traditional
negative-plate printing, that's harder to understand.