The geoid (/ ˈdʒiː.ɔɪd / JEE-oyd) is the shape that the ocean surface would take under the influence of the gravity of Earth, including gravitational attraction and Earth's rotation, if other influences such as winds and tides were absent.

What is the geoid? The geoid is a model of global mean sea level that is used to measure precise surface elevations. A depiction of the United States geoid. Areas in yellow and orange have a …

A geoid is the irregular-shaped “ball” that scientists use to more accurately calculate depths of earthquakes, or any other deep object beneath the earth’s surface. Currently, we use the “WGS84” version (World Geodetic System of 1984).

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 as an imaginary sea-level surface defined by spirit level. It serves as a reference surface that can be used to measure precise elevations of Earth’s surface features.

Feb 2, 2023 · The geoid is a hypothetical shape of the earth that often coincides with the average of the earth's sea level and its imagined extension above or below land areas; the geoid height may sometimes be referred to as the elevation at Mean Sea Level (MSL).

Under the continents the geoid is not directly accessible but is rather the surface to which water would rise if narrow canals were cut through the continents from ocean to ocean. The relationships between land and ocean surfaces, ellipsoid and geoid, are shown in the figure.

The meaning of GEOID is the surface within or around the earth that is everywhere normal to the direction of gravity and coincides with mean sea level in the oceans.

To meet this need, the geoid, a shape that refers to global mean sea level, was created. If the geoid really existed, the surface of the Earth would be equal to a level in between the high-tide and low-tide marks. Although a geoid may seem to be a smooth, regular shape, it isn't.

Apr 11, 2023 · Geoid is defined as an equipotential surface of the Earth’s gravity field that coincides with the mean sea level. It is an imaginary surface that closely approximates the shape of the Earth, taking into account the irregularities in the distribution of mass within the Earth.

The geoid is a measurement of mean sea level (MSL). When you average out the motion of waves, the level at which water settles is MSL. If you want to calculate MSL, all you have to do is just measure the average level of the oceans… and there you have it. But what about the land? Let’s say you dig a canal away from the ocean inwards to the land.