--- Begin Forwarded Message ---
Date: Fri, 30 Apr 1999 16:39:21 -0400
From: Tsering Wangyal Shawa <[log in to unmask]>
Subject: Re: Map Librarianship class <fwd>
Sender: Tsering Wangyal Shawa <[log in to unmask]>
 
 
Thanks for clarifying the word projection and coordinate systems.
 
I have used the word projection in a very general term. Here the map
projected means projected from sphere shape to flat surface. Transverse
Mercator projection->UTM or TMP->State plane coordinate systems. In fact,
UTM and State plane coordinate systems are product of some projections.
 
Once again thanks for bring this issue.
 
Tsering Wangyal Shawa
Geographic Information Systems Librarian
Digital Map and Geospatial Information Center
Geosciences and Map Library
Guyot Hall
Princeton University
Princeton, NJ 08544
Tel: (609) 258-6804
Fax: (609) 258-1274
http://www.princeton.edu/~geolib/gis
 
 
 
At 01:58 PM 4/30/99 -0600, Steven R Holloway wrote:
>A good list of ideas but a note on projections:
>       "b) different between a few of the popular projections such as UTM
>v/s State Plane and their properties and zones."
>
>State plane and UTM are NOT projections, they are co-ordinate systems. Each
>(and each state) have an associated projection. Thus the associated
>projection for the UTM co-ordinate referencing system is one of many
>transverse mercator projections (zone such-and-such) unless of course it is
>in the far north or south. We use a conic state plane projection here in
>Montana because of the east-west orientation of the state.
>
>
>Steven
>
>
>.......        Steven R Holloway       [log in to unmask]
>
>
>
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