-------- Original Message --------
Subject:        USGS topo's COUNTS QUESTION
Date:   Tue, 17 Jul 2007 10:25:22 -0500
From:   Youngblood, Dawn <[log in to unmask]>
To:     Maps, Air Photo & Geospatial Systems Forum <[log in to unmask]>



Colleagues

Counting maps can be trickier than first appears. Would the numbers being reported for USGS topos include or dis-include new editions and photo-revisions?  For example, we have five Dallas sheets in the 7.5 minute series. So, are the counts being reported counting, for example, the Dallas sheet once for all versions or the most current version only, or five times for each photo-revision, or twice for each edition (1958, 1995)?

Dawn Youngblood
PhD, Anthropology / Archaeology
Curator, Edwin J. Foscue Map Library
Southern Methodist University
6425 North Ownby Drive
Box 750375
Dallas TX 75275-0375
[log in to unmask]
214-768-2285


-----Original Message-----
From: Maps, Air Photo & Geospatial Systems Forum [mailto:[log in to unmask]] On Behalf Of Maps-L
Sent: Tuesday, July 17, 2007 8:02 AM
To: [log in to unmask]
Subject: Re: number of USGS topo's

-------- Original Message --------
Subject:        Re: number of USGS topo's
Date:   Tue, 17 Jul 2007 08:50:57 -0400
From:   Paige Andrew <[log in to unmask]>
To:     Maps, Air Photo & Geospatial Systems Forum <[log in to unmask]>




Hi Darlene,

In the late 1990s Melissa Lamont and I worked on an article that was
published in /Technical Services Quarterly/ (Vol. 15, No. 3 1998)
describing how we cataloged our 7.5-minute topo collection here at Penn
State, "Bending the Rules: Creatively Adapting Library Systems to
Automate the Map Collection". Part of the preparation of this article
was the need to track down the same information you are seeking, how
many sheets make up the entire 7.5-minute series? Well, I believe we
posed the question here and got several answers, but we also posed it to
folks at USGS and they couldn't give us an exact figure either, so at
the time we wrote "...more than 57,000 current sheets..." based on the
responses we received. So, even ten years ago there was not a single
answer to this question that all could agree upon.

As to your second question, yes USGS completed mapping the U.S. at this
scale around 5 years ago, and I do remember that the last sheet done was
somewhere in Oregon -- eastern Oregon I believe. I'm trying to tap my
memory on this and do recall an announcement about this that was posted
here on MAPS-L and elsewhere. Sorry I don't have a firm date or place
for you.

Paige

At 03:17 PM 7/16/2007, you wrote:
> -------- Original Message --------
> Subject: number of USGS topo's
> Date: Mon, 16 Jul 2007 13:44:32 -0500
> From: Brimmage, Darlene <[log in to unmask]>
> To: <[log in to unmask]>
>
>
>
> Hi!!
>
> I am speaking to a group next week about material in our Map Collection.
>
> I was trying to verify some info that I thought I had read on this
> list ---
>
> that there are 55, 000 --- 7.5 minute maps
>
> and that USGS completed mapping the entire US at this scale in the last
> 5 to 7 years????
>
> How far off is my memory??
>
> Called USGS and they didn’t seem to have this info at their finger tips….
>
> thought someone on the list might.
>
> Thanks
>
> Darlene Brimmage
>
> Map Specialist
>
> Dallas Public Library