Long Line Geodetic Inverse by P.D. Thomas
While searching for an old post by Dave Lindell I came across a post I had not seen from Dave. It was on 22 July, 2013. “Long Line Inverse Position” He had a form that was on page 68 and said it was Figure 25. Along with wanting to know where it came from (which the poster Melita Kennedy (mkennedy) told him it came from Spheroidal Geodesics, Reference Systems, & Local Geometry). Dave asked the question “why are two distances calculated?
Of the 6 or so posters NO one gave the correct answer. It looks like the posters were only guessing at an answer. I would have thought that the poster base9geodesy would have answered because P.D. Thomas worked for NGS at one time.
So the CHALLENGE is; who can be the 1st poster to give the CORRECT answer ?
JOHN NOLTON
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