Geodesic line on the WGS84 ellipsoid
Drag the globe to rotate, scroll to zoom. Change endpoints or pick a preset to see how the geodesic, great circle, and surface normals behave.
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Quick examples
Distance— km
Azimuth at P1—°
Azimuth at P2—°
Geodesic on ellipsoid
Surface normals
Great circle on sphere
Equator
WGS84: a = 6 378 137 m, 1/f = 298.257223563 · Vincenty inverse/direct