-------- Original Message --------
Subject:        Re: Allen SD Map Artifact
Date:   Tue, 16 Oct 2007 06:28:45 -0600
From:   Mike Flannigan <[log in to unmask]>
To:     Maps, Air Photo & Geospatial Systems Forum <[log in to unmask]>

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It was on the DRG.  I'm not sure about the original map.

So maybe it was as simple as the bottom edge getting
caught up in the scanner.  I thought it was some kind
of electronic processing error.


Mike Flannigan


On Mon, 8 Oct 2007, Dennis McClendon wrote:
>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.