BETA ZEN
Earth ellipsoid
Texto da Wikipédia (en), licença CC BY-SA. O BETARUBI mostra o verbete inteiro nesta página — a leitura não continua fora do site.
An Earth ellipsoid or Earth spheroid is a mathematical figure approximating the Earth's shape and size, used as part of a reference frame for coordinates and computations in geodesy, astronomy, and the geosciences. Various different reference ellipsoids have been used as approximations.