https://**en.wikipedia.org**/wiki/**Geoid**

**The geoid** surface is irregular, unlike the reference ellipsoid which is a mathematical idealized representation of the physical Earth, but considerably smoother than ...

**www.ngs.noaa.gov**/**GEOID**/**geoid**_def.html

DEFINITION. There have been many definitions of **the "geoid**" over 150 years or so. Here is the one currently adopted at NGS: **geoid**: The equipotential ...

**www.ngs.noaa.gov**/**GEOID**

The **National Geodetic Survey GEOID** page ... The **National Geodetic Survey** has released updated models for transforming heights between ellipsoidal coordinates and ...

**dictionary.reference.com**/browse/**geoid**

**The geoid** is defined as the average level of the sea, which is thought of as extended through the continents.

**www.merriam-webster.com**/dictionary/**geoid**

Seen and Heard. What made you want to look up **geoid**? Please tell us where you read or heard it (including the quote, if possible).

**oceanservice.noaa.gov**/facts/**geoid**.html

**What is the geoid**? **The geoid** is a model of global mean sea level that is used to measure precise surface elevations.

**www.britannica.com**/science/**geoid**

**Geoid**, model of the figure of Earth—i.e., of the planet’s size and shape—that coincides with mean sea level over the oceans and continues in continental areas ...

www.ga.gov.au/.../positioning-navigation/geodesy/geodetic-datums/**geoid**

A **geoid** is a three dimensional surface of equal gravity which is perpendicular to the direction of the gravity vector at all points. Since the mass distribution of ...

**www.thefreedictionary.com**/**geoid**

In 1927, geologist William Bowie compared tidal measurements with his own mathematical estimation of **the geoid** to argue that sea levels along the East Coast tilt ...

geodesy.noaa.gov/**GEOID/research**.shtml

The primary function of this page is to link to resources of interest in **geoid research**. However, we keep that interpretation rather broad. So, for example, one might ...