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 …

Geoid, model of Earth’s size and shape that coincides with mean sea level over the oceans and continues in continental areas as an imaginary sea-level surface.

The geoid is an imaginary sea level surface that undulates (has a wavy surface) over all of the earth; it isn’t just for the oceanic areas, it also extends through the land masses.

This irregular shape is called "the geoid," a surface which defines zero elevation. Using complex math and gravity readings on land, surveyors extend this imaginary line through the continents.

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.

Geodesists define the Earth's surface as a surface that closely approximates global mean sea level, but across which gravity is everywhere equal. They refer to this shape as the geoid.

The geoid is the surface of an ideal global ocean in the absence of tides and currents, shaped only by gravity. The colours in the image represent deviations in height from an ideal geoid.

The geoid is a concept in geology that represents the shape of the Earth's mean sea level across the globe, extending over oceans and under continents. It is not a perfect ellipsoid; rather, it diverges …

Jan 30, 2001 · Scematic diagram showing some of the “level surfaces” of the Earth, including the geoid, and their relation to the Earth’s crust and local mean sea level.

The geoid is defined as an equipotential surface of the Earth's gravity field that corresponds to the undisturbed global sea level, serving as a height reference surface for measuring orthometric heights …