Scientific discipline concerned with the size and shape of the Earth, its gravitational field, and the location of fixed points. Originally, all geodesic work was based on land surveys. Now satellites are used in conjunction with the land-based system.
This entry comes from Encyclopædia Britannica Concise.
For the full entry on geodesy, visit Britannica.com.
Seen & Heard
What made you look up geodesy? Please tell us what you were reading, watching or discussing that led you here.