leny
Member
- Joined
- Dec 31, 2006
- Posts
- 308
Is the Great Circle Mapper website accurate to the single mile? What system do airlines use to determine the number of miles they will credit for flights?
GCM is close but it never seems to exactly match the miles paid by airlines. Murphy Law states that when you are right on the QF SC level, GCM will show its over the line but QF will come in under the line.
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Maybe from the airfield datum point would be logical :!:And where on the airport do you take the point used for mileage? If two airports have 4 km runways, simplisticly, there is potentially 8km variation in this alone.