Nothing you have said seems totally unexpected.
Is enormous more than 200 MB?
What is the make and model of the scanner?
Do you see artifacts on good quality maps that
are scanned at moderate resolutions?


Mike


On 2/7/2019 11:00 PM, MAPS-L automatic digest system wrote:
> Subject:
> large format scanner - question about distortion
> From:
> "Dotson, Daniel" <[log in to unmask]>
> Date:
> 2/7/2019, 8:49 AM
>
>
> Hi all
>
>
> We have a new giant scanner that can accommodate maps via sheet 
> feeding.  We are just beginning to play with it and noticed something odd.
>
>
> When scanning at the highest resolution, everything looked fine - 
> except the file size was ENORMOUS.  Note the map goes through much 
> slower than the next scenario.
>
>
> The map scanned at the middle resolution looked fine at first, but 
> then we noticed a few oddities.  For example, an 8 that was 
> handwritten had a duplicated top to the 8 -  basically, it looked like 
> a snowman.  The scanner moved pulled the map through much quicker. The 
> quality at first glance looks nearly the same except for these little 
> blips.
>
>
> Does anyone have any experience why these blips may be occurring? One 
> consideration is that the map was previously folded - however, this 
> didn't seem to affect the higher resolution / lower speed.
>
>
> Maybe the faster speed was the reason - but perhaps someone out there 
> who has used such a scanner before knows what the deal is?
>
>
> Thanks for any insight!
>
> -Danny
>
>
> Daniel S. Dotson
>
> Associate Professor
>
> Head - Orton Memorial Library of Geology & Gardner Family Map Room
>
> Mathematical Sciences Librarian & Science Education Specialist
>
> *The Ohio State University*
> University Libraries
> 180 E Orton Hall - Geology Library, 155 S Oval Mall
>
> Columbus, OH 43210
>
> 614-688-0053 Office
>
> http://orcid.org/0000-0002-2033-2622 
> <https://www.scopus.com/redirect.uri?url=http://www.orcid.org/0000-0002-2033-2622&authorId=20435484000&origin=AuthorProfile&orcId=0000-0002-2033-2622&category=orcidLink>
>
> [log in to unmask] <mailto:[log in to unmask]> library.osu.edu 
> <http://library.osu.edu>
>