-------- Original Message --------
Subject: Re: Can world maps be centered on varying coordinates
Date: Fri, 22 Feb 2013 18:37:39 +0000
From: Mark Jackson <[log in to unmask]>
To: Maps, Air Photo, GIS Forum - Map Librarianship <[log in to unmask]>
It is correct. When in doubt just look at the map:
http://1.usa.gov/159rFjJ (full URL below for those security conscious
folks out there). The edges of the map are actually at 90 degrees west.
With modern cartographic methods it is easier than ever to change the
origin of a projection to emphasize the point of the map. If the map is
about the oceans, splitting North America isn't any stranger that
splitting the Pacific if your map is about the continents.
http://memory.loc.gov/cgi-bin/map_item.pl?data=/home/www/data/gmd/gmd9/g9096/g9096a/ct003193.jp2&style=gmd&itemLink=r?ammem/gmd:@field(NUMBER+@band(g9096a+ct003193))&title=Chart%20of%20limits%20of%20seas%20and%20oceans.
--
Dr. Mark Jackson
Brigham Young University
Geography, Geology, Civil Engineering, & Technology Librarian
2420 HBLL
Provo UT 84602
801.422.9753
[log in to unmask]
On Feb 22, 2013, at 10:14 AM, "Angie Cope, American Geographical Society
Library, UW
Milwaukee" <[log in to unmask]> wrote:
> -------- Original Message --------
> Subject: Re: Can world maps be centered on varying coordinates
> Date: Fri, 22 Feb 2013 12:07:04 -0500
> From: Grabach, Kenneth <[log in to unmask]>
> To: Maps, Air Photo, GIS Forum - Map Librarianship
> <[log in to unmask]>
>
>
>
> I agree with both Paige, and with Susan Moore. However, it would be
> pretty unusual to have a world map that splits the continent of North
> America, so that the westward and eastward bounds of the map would be at
> Longitude W 90! I have a hunch that this record represents error on the
> part of the catalogue record.
>
> Ken Grabach
> Maps Librarian
> Miami University Libraries
> Oxford, OH 45056 USA
>
>
> On Fri, Feb 22, 2013 at 11:59 AM, Angie Cope, American Geographical
> Society Library, UW Milwaukee <[log in to unmask] <mailto:[log in to unmask]>> wrote:
>
> -------- Original Message --------
> Subject: Re: [MAPS-L] Can world maps be centered on varying
> coordinates
> Date: Fri, 22 Feb 2013 10:57:59 -0600
> From: Susan Moore <[log in to unmask] <mailto:[log in to unmask]>>
> To: Maps, Air Photo, GIS Forum - Map Librarianship
> <[log in to unmask] <mailto:[log in to unmask]>>
>
>
>
> Bojana,
>
> We are definitely used to seeing world maps with the left margin at W
> 180 degrees and E 180 degrees. But there's no rule that says a
> cartographer has to have the map with the Atlantic Ocean in the center
> of the map. So it's entirely possible that the record is correct
> and the
> cartographer used a different center point to more adequately display
> what they wanted to get across. The "usual" way of doing a world map
> does split the Pacific Ocean in half so if they wanted the Pacific
> Ocean
> whole, they'd have to not do the "usual".
>
> There's some sentiment that the "usual" way of displaying the world
> emphasizes a Western bias and there are several interesting articles
> about this. It even got mentioned in the television series "The West
> Wing"!
>
> Susan Moore
> University of Northern Iowa
> Cedar Falls, IA 50613
> [log in to unmask] <mailto:[log in to unmask]>
> <mailto:[log in to unmask] <mailto:[log in to unmask]>>
>
>
> On Fri, Feb 22, 2013 at 10:26 AM, Angie Cope, American Geographical
> Society Library, UW Milwaukee <[log in to unmask] <mailto:[log in to unmask]>
> <mailto:[log in to unmask] <mailto:[log in to unmask]>>> wrote:
>
> -------- Original Message --------
> Subject: Can world maps be centered on varying coordinates
> Date: Fri, 22 Feb 2013 16:21:34 +0000
> From: Skarich, Bojana <[log in to unmask]
> <mailto:[log in to unmask]>
> <mailto:[log in to unmask]
> <mailto:[log in to unmask]>>>
> To: [log in to unmask]
> <mailto:[log in to unmask]> <mailto:[log in to unmask]
> <mailto:[log in to unmask]>>'
> <[log in to unmask] <mailto:[log in to unmask]>
> <mailto:[log in to unmask] <mailto:[log in to unmask]>>>
> CC: Marti, Elida <[log in to unmask]
> <mailto:[log in to unmask]>
> <mailto:[log in to unmask] <mailto:[log in to unmask]>__>>
>
>
>
> Hi All,
>
> I’m a newbie map cataloger and I have a question about world maps
> centered on “atypical” coordinates. I have a map:
>
> Chart of limits of seas and oceans (publ. by Aeronautical
> Chart and
> Information Center in 1953).
>
> In a copy record, the left margin longitude is stated as W 90°,
> and the
> right margin longitude is W 90°. (ocm77050953).
>
> Can this be right or is this a cataloging error? Wouldn’t you
> expect a
> world map to have longitudinal coordinates at W 180° degrees and E
> 180°?
> Or is it the case that a world map can be*centered* in any
> longitude
> that better serves the cartographer’s purpose?
>
> Thanks for any feedback you have on this J
>
> Bojana
>
> Bojana Skarich
>
> Non-Print Catalog Librarian
>
> Michigan State University Libraries
>
> 366 W. Circle Drive
>
> East Lansing, MI 48824
>
> 517-353-9034 <tel:517-353-9034> <tel:517-353-9034 <tel:517-353-9034>>
>
> [log in to unmask] <mailto:[log in to unmask]> <mailto:[log in to unmask]
> <mailto:[log in to unmask]>> <mailto:[log in to unmask]
> <mailto:[log in to unmask]>
> <mailto:[log in to unmask] <mailto:[log in to unmask]>>>
>
>
>
>
> --
> Ken Grabach
> Maps Librarian
> BEST Library, 219D
> Miami University Libraries
> Oxford, OH 45056 USA
>
> 513-529-1726
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