richv@hpinddu.cup.hp.com (Rich Van Gaasbeck) (06/05/91)
I would like to play around with a couple of different projections. Specifically I would like to create an azimuthal equidistance X-window of the earth from a country outline database. Would anyone have a formula handy for translating lat/long into x/y coordinates? I'm also trying to create whatever projection you would call "looking at the earth from the moon". I think I can figure this out if I think about it some more, but the azimuthal equidistance projection is beyond me. Perhaps someone can suggest a reference text on the subject. (Not general computer graphics, but specifically covering the bizarre transformations cartographers use to draw a 3d globe onto a 2d piece of paper). richv BTW azimuthal equidistance projections look really weird but are handy in amateur radio to determine which way to point directional antennas.