-------- Original Message --------
Subject:        Re: Subject classification for aerial photographs
Date:   Wed, 29 Oct 2008 11:12:56 -0400
From:   Paige Andrew <[log in to unmask]>
To:     [log in to unmask], [log in to unmask]
References:     <[log in to unmask]>



Harry,

Use .A43 for actual remote-sensing images that have not been altered,
whether they are air photos or satellite images. And, the definition of
a remote-sensing /i_mage_/ is that it is the original image without any
kind of information added to it. (Its okay if there is textual
information in the surrounding margins though.)

Once someone adds things like name of cities or highway designations, or
puts in spot heights, the image becomes a remote-sensing /_map_/ and
thus is cuttered .A4.

"Views" are most-generally bird's-eye views, naturally these are simply
a genre of a map. While an aerial view can logically include a
remote-sensing image (air photograph, satellite image, etc.), in the
generic sense its typically used to mean a map of a place taken from a
perspective elevation and thus these are cuttered .A3. Note that on the
line in the G-schedule next to ".A3" it explicitly says "bird's-eye view".

Hope these distinctions helps!

Paige



At 11:00 AM 10/29/2008, Maps-L Moderator wrote:
> -------- Original Message --------
> Subject: Subject classification for aerial photographs
> Date: Wed, 29 Oct 2008 09:51:43 -0500
> From: Harry Davis <[log in to unmask]>
> To: <[log in to unmask]>
>
>
>
> I admit to some confusion in terms of appropriate use of the .A3, .A4,
> and .A43 subject-letter numbers in the G schedule, especially as related
> to corresponding LCSH.
>
> Which A number is preferred in the call number for a set of aerial
> photographs? Are they be seen as “views” (.A3), “maps” (.A4), or
> “images” (.A43)?
>
> Which LCSH are best for air photos?
>
> I lean towards .A43, but I need substantiation. Again, what thoughts or
> recommendations can you share?
>
> Thanks,
>
> Harry O. Davis
>
> Map Librarian
>
> Liaison Librarian for Civil and Environmental Engineering,
>
> Geography and Environmental Resources, Geology,
>
> Maps, and Mining and Mineral Resources Engineering
>
> Morris Library
>
> Southern Illinois University Carbondale
>
> Carbondale, IL 62901-6632
>
> Phone: 618~453~2372 or 618-453-2705
>
> [log in to unmask]