-------- Original Message --------
Subject: Re: Simple? Cataloging Questions
Date: Wed, 9 Sep 2009 13:25:15 -0700 (PDT)
From: Kathy Stroud <[log in to unmask]>
To: Air Photo & Geospatial Systems Forum Maps <[log in to unmask]>
CC: Dawn Collings <[log in to unmask]>
Thanks all for your prompt responses!
Yes, a slip of the fingers gave me the wrong field.
I'm going to go with Ken's answer as the most complete
Kathy Stroud, Map/GIS Librarian
Biological/Agricultural Sciences and Map Services, Shields Library
100 NW Quad Ave.
Davis, CA 95616-5292
530-752-5248
----- "Angie Cope" <[log in to unmask]> wrote:
> -------- Original Message --------
> Subject: RE: Simple? Cataloging Questions
> Date: Wed, 9 Sep 2009 14:12:11 -0400
> From: Grabach, Kenneth A. Mr. <[log in to unmask]>
> To: [log in to unmask] <[log in to unmask]>
> References: <[log in to unmask]>
>
>
>
> Paige put it really well. I want to add a bit, partly to make sure I
> am understanding what you are really trying to ask. The coordinates
> as given in 255 $c should be thought of as the corners of a
> quadrangle. First are the West-East boundaries or corners. If you
> have a map that straddles the Prime Meridian, say a map of Britain, of
> France, North Africa, etc., the western coordinate would be rendered
> as W, and the Eastern as E. If the meridian is one of the bounding
> longitudes, you would render it depending on which hemisphere the map
> is actually in. Where the Greenwich meridian as to the eastern edge,
> the map is showing something in the Western hemisphere, so you would
> use W. If the meridian is at the western edge, the map is showing the
> Eastern hemisphere, and the longitude would be rendered as E.
>
> The same holds for the Equator, and the North-South boundaries or
> corners. If the map straddles the Equator, you would use both N and S
> for the coordinates of the map. If the map shows the Equator as at
> the southern edge, the map is in the Northern hemisphere, and you
> would use N. Conversely, if the map is in the Southern hemisphere,
> with the Equator at the northern edge, you would use S.
>
> Cartographic Materials gives further explanation of this, in 3D. It
> also tells how to render coordinates for world maps. But again, how
> to render the Prime Meridian or the Equator only enter into it when
> one or both is a bounding coordinate. You are really telling the user
> what hemispheres the map portrays a view of: East or West, or both,
> and North or South, or both.
>
> Ken Grabach <[log in to unmask]>
> Maps Librarian Phone: 513-529-1726
> Miami University Libraries
> Oxford, Ohio 45056 USA
>
>
> -----Original Message-----
> From: Maps, Air Photo & Geospatial Systems Forum
> [mailto:[log in to unmask]] On Behalf Of Maps-L Moderator
> Sent: Wednesday, September 09, 2009 1:51 PM
> To: [log in to unmask]
> Subject: Re: Simple? Cataloging Questions
>
> -------- Original Message --------
> Subject: Re: Simple? Cataloging Questions
> Date: Wed, 09 Sep 2009 13:51:03 -0400
> From: Paige Andrew <[log in to unmask]>
> To: [log in to unmask], [log in to unmask]
> References: <[log in to unmask]>
>
>
>
> Kathy,
>
> You are mixing up your projection statement with your coordinates
> values. No directional information goes with projection information,
> only the name of the projection as it appears on the map goes into
> 255$b. Coordinates go into 255$c and must include directional
> information. Although not necessarily "politically correct" I think
> the direction for Greenwich prime meridian has traditionally been "W
> 0[degrees]"
>
> Paige
>
> At 01:37 PM 9/9/2009, Maps-L Moderator wrote:
> >-------- Original Message --------
> >Subject: Simple? Cataloging Questions
> >Date: Wed, 9 Sep 2009 10:08:08 -0700 (PDT)
> >From: Kathleen Stroud <[log in to unmask]>
> >To: Air Photo Maps-L <[log in to unmask]>
> >CC: Dawn Collings <[log in to unmask]>
> >
> >
> >
> >In the Statement of Projection (field 255 $c) What is the direction
> >(E or W?)for the Prime Meridian, 0 degrees? Do we have to fill in
> >the direction blank?
> >
> >Thanks,
> >
> >Kathy Stroud, Map/GIS Librarian
> >Biological/Agricultural Sciences and Map Services, Shields Library
> >100 NW Quad Ave.
> >Davis, CA 95616-5292
> >530-752-5248
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