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 …

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 particular equipotential surface that coincides over the oceans with unperturbed mean sea level constitutes the geoid. Under the continents the geoid is not directly accessible but is rather the …

Nov 14, 2025 · GEOIDs are numeric codes that uniquely identify all administrative/legal and statistical geographic areas for which the Census Bureau tabulates data. From Alaska, the largest state, to the …

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.

The geoid is a mathematical model of the Earth in which the geoid surface coincides exactly with the average elevation of the surface of the planet’s oceans. This model surface is extended over the …

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.

Oct 1, 2025 · The geoid is defined as the surface of the earth's gravity field, which approximates mean sea level. It is perpendicular to the direction of the force of gravity. Since the mass of the Earth is not …

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.