10/18/18 - :
- Geoid vs. Ellipsoid
(image from here).
- Shape of the Earth (Geoid)
(image from here).
A 10,000x exageration shows off the roughly 180 m variations in the Geoid height.
Image developed from data
More information about the GRACE program can be found here.
An
Animation of Geoid may help visualization. (image from here).
- GOCE: Global Geoid measurements (released 9/30/09)
Whole-earth geopotential surface geometry showing deviations from a reference ellipsoidal surface.
Note the most obvious features are those associated with topography (Mountains and Trenches), however large deviations
exist particularly, on the edges of mountains, and in places like southern India
More information about the GOCE (Gravity field and Ocean Circulation Explorer) program can be found at ESA.
- US Bouguer Gravity Anomaly Map
source http://web.mst.edu/~sgao/maps/US_Bouguer_gravity.jpg.
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