| don1reed |
03-03-06 08:08 PM |
Re: Round or flat earth? -- Trans-Atlantic Plotting
Quote:
Originally Posted by Hitch
All,
I'm getting ready to make a Trans-Atlantic voyage and was wondering if SH3 models a round or flat earth? It seems that when I plot a Great Circle Route (north up to Greenland and then down the coast from Newfoundland) it actually is a longer path than if I just plot one straight across to America.
Also, what was the historical optimal path to the Carribbean and S. America?
Thanks,
Hitch
|
GC courses appear to be longer, curved, on Mercator Projection charts and Rhumb line courses appear as straight lines; whereas the reverse occurs on Oblique Mercator, Gnomic and Conic Projection charts See Bowditch, Chap 3.
http://pollux.nss.nima.mil/pubs/pubs...s.html?rid=187 |
