The oblate ellipsoid of revolution used to approximate the Earth’s shape. The Earth’s shape can now be determined by radar ranging from satellites. See Figures G-1 and G-2 and Geodetic Reference System.
This website uses cookies. If you continue without changing your browser settings, you consent to our use of cookies in accordance with our cookie policy. You can disable cookies at any time. Learn more
We also use partner advertising cookies to deliver targeted, geophysics-related advertising to you; these cookies are not added without your direct consent.