Construct · 1 fields · 1 citations

geoid: a standalone construct

One name. One construct. A landmark on the map.

● anchor · a standalone construct Nearest construct by meaning·not indexed
geoid1 CONSTRUCTGeoidLISTING · EQUIPOTENTIAL

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Geodesy

the equipotential surface of Earth's gravity field that most nearly matches global mean sea level.

The geoid is the equipotential surface of the Earth's gravity field that most nearly coincides with global mean sea level, imagined to continue beneath the continents. Because the Earth's mass is distributed unevenly, this surface is a gently undulating shape rather than a smooth ellipsoid, and it serves as the reference for orthometric heights, ordinary heights above sea level. The term was coined by J. B. Listing in 1873, and Torge and Müller's Geodesy gives its modern treatment. The referent is the gravity-defined figure of the Earth used as the datum for heights.[1]

Unit
Geoid undulation: its separation from the reference ellipsoid, in metres
Recovery means
Not applicable
Measured by
Determined from gravimetry, satellite gravity missions, and levelling, expressed as undulations relative to the ellipsoid

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Nearby constructs

ellipsoid3 fields · 3 citationsjingle · one word, three constructsspheroid2 fields · 2 citationsjingle · one word, two constructs

References

  1. Torge, W., & Müller, J. (2012). Geodesy (4th ed.). De Gruyter. ISBN 9783110207187

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