We also have hoped that the method of expressing coordinates could 
become more standardized in MODS; while recognizing the need to 
accomodate mapped legacy "statement" data from MARC, we'd like to be 
able to describe the n-sided polygon and to specify the format of the 
coordinates in an attribute.

We've also wondered whether to go with decimal or degree-minute-second. 
Decimal can be expressed with available keyboard characters (if the 
degree symbol is omitted), that may be an advantage.   The format of the 
coordinate expression needs to incorporate hemisphere, otherwise 
hemisphere needs to be expressed another way in the element, perhaps as 
an attribute. 

*Laura Akerman
Technology and Metadata Librarian
Robert W. Woodruff Library, Room 128
Emory University
Atlanta, Ga. 30322
phone (404) 727-6888
fax 404-727-0053*

Ray Denenberg, Library of Congress wrote:

>John --
>"coordinates" contains a statement of coordinates covered by the
>resource. One or more statements may be supplied. If one is supplied, it
>is a point (i.e., a single location); if two, it is a line; if more than
>two, it is a n-sided polygon where n=number of coordinates assigned. No
>three points should be co-linear, and coordinates should be supplied in
>polygon-traversal order.
>We should correct this.
>"statement of coordinates" was intended to represent a single point (i.e. a
>single pair - latitude and longitude) and looking closely at it, it doesn't
>(it seems that it represents a bounding box, i.e. 4-sided polygon).  So we
>need to change the wording, so that:
>" 'coordinates' contains a statement of coordinates covered by the
>resource. One or more statements may be supplied."
>should be replaced by something along these lines:
>" 'coordinates' contains a pair of coordinate representing a single
>geographic point.  It   is repeatable (so one or more points may be
>I  take it that you want to represent a bounding polygon, arbitrary number
>of sides (i.e.  not limited to a 4-sided polygon)?
>----- Original Message ----- 
>From: "John Banning" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Wednesday, May 10, 2006 4:37 PM
>Subject: [MODS] <coordinate> examples
>Hi all,
>I was curious if anyone could provide examples of how geographic
>coordinates are being represented in MODS. I am specifically interested in
>representing bounding coordinates for maps. I read in the user guide that
>the information contained in this element is "equivalent to MARC 21 fields
>034 and 255" but wanted to know specifically if decimal degree
>(34.558889, 16.253889) or degree/minute/second (34 33' 32.00", 16 15'
>14.00") the preferred geographic representation?
>Thanks in advance,
>John Banning