Great Circle Calculation - Vincenty Method

Reference geodetic ellipsoid:

Pick location:
Restrict to

° °

Latitude: (+ for N, - for S)
Longitude: (+ for E, - for W)
Location:  
Number of locations:
Latitude 1: (+ for N, - for S)
Longitude 1: (+ for E, - for W)
Location 1: 
Latitude 2: (+ for N, - for S)
Longitude 2: (+ for E, - for W)
Location 2: 
Number of waypoints:
Geodetic distance: km
Azimuthal angle 1: ° CW from N
Azimuthal angle 2: ° CW from N