-------- Original Message -------- Subject: New article in Coordinates Date: Mon, 16 Mar 2009 10:11:28 -0700 From: Dyallen2 <[log in to unmask]> Reply-To: To: The latest edition to Coordinates (Series A, no. 7) is John Hessler, "How to Map a Sandwich: Surfaces, Topological Existence Theorems and the Changing Nature of Modern Thematic Cartography, 1966-1972." This article deals with the mathematical underpinnings of GIS. It should be of particular interest to those interested in the historical origins of GIS, or in the relationship between cartography and mathematics. Coordinates (http://www.sunysb.edu/libmap/coordinates.htm) is the online journal of the Map and Geography Round Table of the American Library Association. David Allen Editor Coordinates