----------------------------Original message---------------------------- Re: Charles Gilley's inquiry about John Snyder's Map Projections: A Working Manual You might also want to look at his "Computer-Assisted Map Projection Research", USGS Bulletin 1629, published in 1985. It is available from USGS Denver for $6 a copy. If you send me a postal or fax address I'll send you a copy of the Table of Contents. Also, you probably could see both publications at a "Government Publications Depository Library" which include most large university libraries and some large public libraries. Betty Graziani USGS NMD Reference Collection National Center, MS-522 Reston, VA 22092 e-mail: [log in to unmask]