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Date:   Thu, 13 Jul 2006 07:53:52 -0400
Reply-To:   Subject Coordinates Discussion List <[log in to unmask]>
Sender:   Subject Coordinates Discussion List <[log in to unmask]>
From:   Colleen Cahill <[log in to unmask]>
Subject:   Re: The proposal passed MARBI!
Content-Type:   text/plain; charset="ISO-8859-1"

Paige Andrew wrote:

As to the accuracy of a set of coordinates, of course that depends on the source and I believe (Colleen, help me out here) that we are going to rely on data primarily from trusted sources such as GNIS and GEOnet, but also are gathering datasets from ESRI and other like institutions.


Paige is correct that coordinate data will need to come from trusted

sources, but there are some that might be constrained from offering their data. Since the Broad of Geographic Names is the body that establishs the

US officially recognized name for foreign places, they would hestitate to give bounding box coordinates as this could be constrused to mean the coordinates had some legal US definition of borders. It would also be

possible for coordinates to be added by the cataloger who is creating the

authority record an in some cases, this might be the best source for that data, as they could have access to local information. If they are trusted to establish the name, why not the coordinates, if easily found?

One thing to keep in mind is these are thematic coordinates, not legally bindings ones. Like any authority data, they can be updated and corrected as needed. Since their primary purpose is for subject searching, the question of who is an authority needs to be tempered with that. And for historical data, we are likely to have to look beyond GNIS, focuses on current coordinate information.

Colleen Colleen R. Cahill | [log in to unmask] Digital Production Coordinator | (202)707-8540 & Recommending Officer for | FAX (202)707-8531 Science Fiction & Fantasy | Library of Congress These opinions are mine, Mine, Mine! | Washington, DC 20540-4652

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