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Geoid - definition(s)

geoid - [geodesy] A hypothetical surface representing the form the earth's oceans would take if there were no land and the water were free to respond to the earth's gravitational and centrifugal forces. The resulting geoid is irregular and varies from a perfect sphere by as much as 75 meters above and 100 meters below its surface.

[Category=Geospatial ]

Source: esri, 29 April 2012 09:51:58, External 

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