-------- Original Message --------
Subject: RE: Disco Ball Globe?
Date: Mon, 12 Apr 2010 10:59:48 -0400
From: Grabach, Kenneth A. Mr. <[log in to unmask]>
To: Maps, Air Photo, GIS Forum - Map Librarianship
<[log in to unmask]>
References: <[log in to unmask]>
I suppose it would depend upon whether the image is reflected or projected on either wall. In the reflected version, I think whatever geometry it possesses, it would be a new form of map projection, a Reverse (geometry) projection. And in a cylindrical room, it would become a Reverse Cylindrical projection. Disco halls can take on a variety of shapes, including trapezoidal and others. And imagine if one were used inside a geodesic dome. My head begins to reel at the myriad possibilities.
Good luck, Tinho!
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, GIS Forum - Map Librarianship [mailto:[log in to unmask]] On Behalf Of Angie Cope
Sent: Monday, April 12, 2010 10:41 AM
To: [log in to unmask]
Subject: Re: Disco Ball Globe?
-------- Original Message --------
Subject: RE: Disco Ball Globe?
Date: Mon, 12 Apr 2010 15:37:25 +0100
From: Da Cruz, Tinho <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
References:
<[log in to unmask]>
<[log in to unmask]>
If one's disco ball is in a cuboidal room, what is the projection of the map reflected on the walls? What if one is in a cylindrical room*? I can't find disco ball in any Snyder index that I have (Geol Survey Bulletin 1532 or USGS Professional Paper 1453).
There's a opening here for an educational disco ball. Who'll be first to get a disco ball and some glass paint? Do we also need a transparent disco ball with a source of light in its centre?
I teach our students about projections with: an inflatable globe that has no colouring for the sea, a sheet of white paper, and an overhead projector. I shine the overhead projector through the globe and hold the sheet of paper against the other side of it. By holding the sheet of paper flat, in a 'tube', or in a cone one can demonstrate several different types of projection. I was very happy with this method, but now I want a disco ball.
Best wishes
Tinho
*common with those of us working in ivory towers.
...............................
Antonio da Cruz (Tinho) [log in to unmask]
Map Curator, Department of Geography,
Roxby Building University of Liverpool, LIVERPOOL L69 7ZT
Telephone: 0151 794 2844
Fax: 0151 794 2866
See the British Archaeological Association web page
http://www.britarch.ac.uk/baa
----- Forwarded Message -----
From: "Frank Stieber" <[log in to unmask]>
To: "Air Photo & Geospatial Systems Forum Maps" <[log in to unmask]>
Sent: Friday, April 9, 2010 5:22:01 PM GMT -06:00 US/Canada Central
Subject: Disco Ball Globe?
This seems like an appropriate Friday Question...Has anyone ever superimposed a Map of the World onto a Disco Ball?
I Really want to know, because if they haven't it needs to be done!
Happy Friday!
Frank L. Stieber
Associate Librarian, Substitute
Salt Lake City Public Library
[log in to unmask]
801-448-9301
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