I`m interested in terrain modeling. Got an acad file with all the data needed about the site ... ( izohipses ((?) - don`t know if `s an English word), and a lot 2D points - but all on zero elevation !!! :-( So I started to elevate them to the Z value they represent, and found out it`s a long and boring process. Someone has made this routine easier before - I`m sure! But whats the name of that routine ??? Lisp ? Help help help