noun a three-dimensional representation of the earth's surface that takes into account variations in gravity and topography
In surveying, the geoid is used as a reference for determining elevations and creating precise measurements of the Earth's surface.
In geodesy, the geoid is the equipotential surface that would coincide with the mean ocean surface of the Earth, if the oceans were in equilibrium, and serves as a reference for measuring elevations on land.
In cartography, the geoid is used as a reference surface for creating accurate maps and representing the shape of the Earth.
In geophysics, the geoid is used to study the Earth's internal structure and variations in gravity that can provide insights into the composition of the planet.
In physical geography, the geoid is used to model the Earth's gravitational field and understand variations in gravity across the planet.
A writer may use the concept of geoid when researching for a science fiction novel set in a different planet with a unique gravitational field.
Geologists use geoid data to study the Earth's gravitational field and understand variations in gravity across different regions.
Surveyors use geoid models to accurately measure elevations and establish reference points for construction projects.
Geophysicists use geoid data to study the Earth's interior structure and map subsurface features based on gravitational anomalies.
Astronomers use geoid models to study the gravitational interactions between celestial bodies and predict their orbits.