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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Point 1

Point 2

Quick examples

Distance— km
Azimuth at P1—°
Azimuth at P2—°

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Count:
Geodesic on ellipsoid
Surface normals
Great circle on sphere
Equator

WGS84: a = 6 378 137 m, 1/f = 298.257223563 · Vincenty inverse/direct