Cassini projection

The Cassini projection is a transverse cylindrical map projection that maintains scale along the central meridian and all lines parallel to it, and is neither equal-area nor conformal. It is best suited for large scale mapping of areas predominantly north-south in extent and areas near the central meridian, however the Transverse Mercator projection is often preferred because of the difficulty measuring scale and direction in Cassini.

Since the scale is constant along any straight line on the map that is parallel to the central meridian, the projection is more suitable for regions that are north-south in extent than for regions extending in other directions. Formerly used by the Ordnance Survey in Great Britain, Cassini is still used in Cyprus, Czechoslovakia, Denmark, Germany, and Malaysia.



More Information

 * Cassini Projection
 * Cylindrical Projections
 * 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