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Rocky

Earth Geometry

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I have the formula that give the heading and distance between 2 points located with their latitude/longitude coordinates. Something like: (heading, distance) = f(P1, P2)Now I would like to have the formula that give the position (latitude, longitude) of P2 when you give P1, heading and distance. Something like: P2 = f(P1, heading, distance)I know I just need to turn the formula the other way round, but they are so complex that it is difficult for me to handle it. I searched the web (Math sites) but couldn't find it.Please let me know if you have something.Thanks.Eric

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Try Pilot's Assistant which may help. It's downloadable from here. The file name is p_assist_v166.zip.

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Thanks for your help. I finally found the answer on a web site. I will try Pilot's Assistant also, it may contain interesting information.Thanks!!Eric

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