On 6/18/2014 12:07 AM, David Gilbert wrote: > The HFTA terrain file is a very simple text file containing two > columns of paired numbers (one for distance and one for elevation) and > is trivial to edit. Yes. When I was first learning HFTA, I generated a couple of radials by tracing a line, picking elevations off of a terrain map. 73, Jim K9YC