for an excellent description as well as how to do: get a copy of "Contouring - a guide to the analysis and display of spatial data" by d. Watson, 1992. the book comes with a computer disk that has many of the basic programs. I have the 1992 version, and the info you want is on pages 61 to 68 _______________________________________________________________________ List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MapInfo-L" in the message body.
