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Subject:	Re: Help determine projection
From:	Angie Cope <[log in to unmask]>
Reply To:	[log in to unmask]
Date:	Sun, 23 Feb 2014 19:40:25 -0600
Content-Type:	text/plain
Parts/Attachments:	text/plain (77 lines)

----- Forwarded Message -----
From: "nat case" <[log in to unmask]>
To: "Air Photo Maps,GIS Forum - Map Librarianship" <[log in to unmask]>
Sent: Friday, February 21, 2014 4:52:04 PM
Subject: Re: Help determine projection

How does the Lambert/Albers variation in state maps match up with the Lambert/UTM variation in state planes? While state plane zones are meant to be used for sections of a state, I've noticed that often state geodata is delivered uniformly for the entire state using a state plane projection from the central zone of a state. Was UTM used for state-wide mapping as well as Lambert and Albers? Or is that just about geodata?

Nat Case
INCase, LLC
Minneapolis, MN

-----Original Message-----
From: "Angie Cope, American Geographical Society Library, UW Milwaukee"
Sent: Feb 21, 2014 3:46 PM
To: [log in to unmask]
Subject: Re: Help determine projection

-------- Original Message --------
Subject:        Re: Help determine projection
Date:   Fri, 21 Feb 2014 16:43:47 -0500
From:   Grabach, Kenneth <[log in to unmask]>
To:     Maps, Air Photo, GIS Forum - Map Librarianship <[log in to unmask]>

Nowadays most maps of a single state are produced on the Lambert conformal conic projection. � But many maps don't give a projection statement, especially from the time you are describing.

Lambert Conformal Conic has been used since about 1938 or 1940, especially for states with east-west expanse. � If it is not that, it could be the Albers Equal Area Conic.

Ken Grabach
Maps Librarian
Miami University Libraries
Oxford, OH � 45056 USA

On Fri, Feb 21, 2014 at 3:26 PM, Angie Cope, American Geographical Society Library, UW Milwaukee < [log in to unmask] > wrote:

Any idea of the projection of these maps:

� ... State maps dating around 1912-1916.

U.S. Geological Survey

State of [____] : lands designated by the Secretary of the Interior under the provisions of the Enlarged Homestead Acts / Department of the Interior ; compiled and drawn by I.P. Berthrong ; engraved by the U.S. Geological Survey.

Example here:

http://www4.uwm.edu/libraries/AGSL/wyoming%20homestead%20act.jpg

Thanks!

Angie

--

Ken Grabach
Maps Librarian
BEST Library, 219D
Miami University Libraries
Oxford, OH � 45056 � USA

513-529-1726

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