Armadillo projection

The Armadillo projection (also called the Raisz Armadillo projection or Orthoapsidal projection) is a world map projection that projects orthographically onto the surface of a torus with radii 1 and 1.

The projection was created by Erwin Raisz in 1943 and is distinguished by its three dimensional likeness to a curled armadillo.

More Information

 * Other Interesting Projections - Carlos A. Furuti website, www.progonos.com
 * Orthoapsidal World Maps by Erwin Raisz
 * The Nomenclature and Classification of Map Projections Empire Survey Review No. 51, Vol VII January 1944 Pages 190-200 ; L.P. Lee, Lands Survey Department, Wellington, N.Z.
 * Matching the Map Projection to the Need
 * List of ESRI-supported map projections
 * Weisstein, Eric W. Map Projections. From MathWorld--A Wolfram Web Resource.
 * Map Projections''. Atlas of Canada.
 * Cartographical Map Projections'', Carlos A. Furuti website, www.progonos.com.
 * Elements of Map Projection. (26 MB download) U.S. Coast and Geodetic Survey, Special Publication 68 (1938).
 * Map Projections. USGS Publications. December 2000.
 * What are map projections? ArcGIS 10 Online Help
 * University of Colorado at Boulder - Map Projection Overview with Illustrations
 * Data Projections. GeoCommunity Web site.
 * Wiki.GIS.com - Types of Projections