Calculating distance between two Lat Long points with different altitudes?

by esdanol   Last Updated February 20, 2019 16:22 PM

If we assume that the altitude is held constant, the great circle distance is correct. However if the radius of the circle is not constant how can the distance be calculated? In my case the altitude changes linearly from point1 to point2.

What is the correct way then, to calculate the distance between two Lat Long points with different altitudes?



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