-------- Original Message --------
Subject:        Re: Aerial Photos Scanning Parameters Question
Date:   Tue, 26 Aug 2008 10:33:44 -0400
From:   Patrick McGlamery <[log in to unmask]>
To:     [log in to unmask]
References:     <[log in to unmask]>



I agree with Dennis.  Whenever possible, get digital copies form the
original.  It may cost more in the short run, but will have more use on
the long run.

Patrick McGlamery

On Tue, Aug 26, 2008 at 9:08 AM, Maps-L Moderator <[log in to unmask]
<mailto:[log in to unmask]>> wrote:

    -------- Original Message --------
    Subject:        Re: Aerial Photos Scanning Parameters Question
    Date:   Mon, 25 Aug 2008 21:06:11 -0500
    From:   Dennis McClendon <[log in to unmask]
    <mailto:[log in to unmask]>>
    To:     [log in to unmask] <mailto:[log in to unmask]>
    CC:     [log in to unmask] <mailto:[log in to unmask]>




    I'm familiar with the NIPC Mylar film of which you speak (as a
    longtime user), and I honestly think that scanning the Mylar halftone
    film is pretty much a waste of time and money.  Once broken up into
    coarse halftone dots, there's no real way to put imagery back
    together into continuous tones except to blur it, which will make it
    usable only at around 1:50,000 or smaller scale.  I would suggest
    that it would be much wiser to work from the original 9x9 negs from
    Geonex.  I also thought that NIPC had sets of 9x9 contact prints from
    most of the series.  Those could be scanned as contone originals.

    Dennis