Geometry/geography question
Hi all,
I'm planning to write a flight planning program and one of the features I want to add is the ability to take a pair of lattitude/longitude coordinates and and turn them into a bearing and distance, or vice versa. I fugure that can be useful when setting up the aerodromes. I know how to do it with a flat surface, but unfortunately the designers of this planet didn't think to simplify the navigation process (I'll have to have a word with Slartibartfast about that). So, does anybody out there know the formulae or where I can find them?
Cheers.
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Per dementia ad astra