-------- Original Message --------
Subject: RE: Re: USGS quad numbers
Date: Wed, 25 Feb 2009 08:18:31 -0600
From: John M Anderson <[log in to unmask]>
To: <[log in to unmask]>
References: A<[log in to unmask]>
Hello All,
The Louisiana Department of Transportation and Development using the
same scheme which also starts the northwest corner of the state. Most
users who get their maps from LaDoTD request them from us by the
number-letter combination. USGS started including the Louisiana DoTD
number-letter designator under the adjacent quadrangles diagram on their
editions in the mid-1990s.
John
John M. Anderson
Map Librarian and Director
Cartographic Information Center
Department of Geography & Anthropology
LSU
Baton Rouge, LA 70803
(225) 578-6247
-----Original Message-----
From: Maps, Air Photo & Geospatial Systems Forum
[mailto:[log in to unmask]] On Behalf Of Maps-L Moderator for Arlyn
Booth
Sent: Tuesday, February 24, 2009 8:50 AM
To: [log in to unmask]
Subject: Re: USGS quad numbers
-------- Original Message --------
Subject: RE: USGS quad numbers
Date: Tue, 24 Feb 2009 08:48:56 -0600
From: Booth, Arlyn <[log in to unmask]>
To: <[log in to unmask]>
It's on the indexes from the Illinois State Geological Survey. I always
assumed it was theirs.
Arlyn Booth
Map Coordinator
Illinois State Library
300 S. 2nd, Rm. 305
Springfield, IL 62701-1796
(217) 558-4140
FAX (217) 557-6737
[log in to unmask]
Jesse White, Secretary of State & State Librarian
-----Original Message-----
From: Maps, Air Photo & Geospatial Systems Forum
[mailto:[log in to unmask]]On Behalf Of Maps-L Moderator for Jenny
Marie Johnson
Sent: Monday, February 23, 2009 11:08 AM
To: [log in to unmask]
Subject: USGS quad numbers
-------- Original Message --------
Subject: USGS quad numbers
Date: Mon, 23 Feb 2009 11:07:14 -0600
From: Jenny Marie Johnson <[log in to unmask]>
Reply-To: [log in to unmask]
To: MAPS-L <[log in to unmask]>
I've been asked about a historic map numbering scheme for USGS quads.
The system would have been in use perhaps in the early 1970s.
15-minute quads were assigned a 1-3 digit number. I believe that
Illinois index that I saw this on started the numbering in the NW corner
of the state and went across rows of quads from W to E and then back to
the W to begin the next line (in other words, numbers didn't seem to
zig-zag).
Within the 15-minute quads, the 7.5-minute quads were assigned letter
designations (A, B, C, or D) going in counterclockwise order starting
with the NE quad.
I don't know if this was an official scheme or if it was homegrown. The
person who asked me thought that these alpha-numeric combinations were
used on USGS order forms. Obviously, if it was an official scheme it
didn't last because USGS presented us with the 5-digit + letter + number
scheme in the early/mid-1980s!
The scheme vaguely feels like some of the really old AMS numbering
schemes.
Has anyone seen something like this for USGS quads?
Many thanks!
Jenny Marie Johnson
Map and Geography Library
University of Illinois at Urbana-Champaign
[log in to unmask]
217-333-3855
************************************************
Disclaimer - This email and any files transmitted with it are
confidential and contain privileged or copyright information. You must
not present this message to another party without gaining permission
from the sender. If you are not the intended recipient you must not
copy, distribute or use this email or the information contained in it
for any purpose other than to notify the Office of the Illinois
Secretary of State.
If you have received this message in error, please notify the sender
immediately, and delete this email from your system. Any views expressed
in this message are those of the individual sender, except where the
sender specifically states them to be the views of the Office of the
Illinois Secretary of State.
************************************************
|
