The orthometric (geoid) height of a point of the Earth Surface is the distance H_{o} from the point to the geoid.
The ellipsoidal height of a point of the Earth Surface is the distance H_{e} from the point to the ellipsoid.
Earth surface, ellipsoid and geoid | Orthometric height H_{o} and ellipsoidal height H_{e} |
The geoid height above the ellipsoid (N) is the difference between the ellipsoidal height and orthometric (geoid) height.
N = H_{e }− H_{o}_{}
Where:
N = geoid height above the ellipsoid
H_{e }= ellipsoidal height
H_{o }= orthometric (geoid) height
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