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MODS  July 2008

MODS July 2008

Subject:

mods:cartography/mods:coordinates

From:

Mark Diggory <[log in to unmask]>

Reply-To:

Metadata Object Description Schema List <[log in to unmask]>

Date:

Mon, 14 Jul 2008 21:46:40 -0700

Content-Type:

text/plain

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text/plain (123 lines)

Hello,

So I've come across this thread online about mods:coordinates.  And  
now I'm seeing an incompatable case while attempting to map DCMI Box  
to MODS.  Apparently, DCMI Box is defined to be a Bounding Box (or  
Window) representing a rectangular area on a map.

http://dublincore.org/documents/dcmi-box/

Since mods:coordinates are "points" one cannot use them easily to  
produce a bounding box without having to also convert from points to  
sides (and vis versa).

My question, is there any way to represent the sides of a bounding  
box (not the corners of a polygon) in MODS?

thanks,
Mark

~~~~~~~~~~~~~
Mark R. Diggory - DSpace Developer and Systems Manager
MIT Libraries, Systems and Technology Services
Massachusetts Institute of Technology
Home Page: http://purl.org/net/mdiggory/homepage


> Ray,
>
> 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
> -- 
> 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 --
> >
> > See
> > http://www.loc.gov/standards/mods/v3/mods-userguide- 
> elements.html#coordinates
> >
> > ------
> > <coordinates>
> > "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
> > specified)."
> >
> > I  take it that you want to represent a bounding polygon,  
> arbitrary number
> > of sides (i.e.  not limited to a 4-sided polygon)?
> >
> > --Ray
> >
> > ----- Original Message -----
> > From: "John Banning" <jbanning-blo 
> +y7B6FfY3r0Ub5QXD9Q@xxxxxxxxxxxxxxxx>
> > To: <MODS-0lvw86wZMd/ipf4q2MuE5g@xxxxxxxxxxxxxxxx>
> > 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
> >
>

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