Ellipsoid
An ellipsoid is a mathematically defined surface used to approximate Earth’s shape globally or regionally. It serves as the reference for geodetic coordinates and heights. Common realizations include WGS84 and GRS80.
IAG as part of the IUGG
IAG Related Organisations
IAG collaborates closely with numerous organizations within geodesy and beyond. See the list for details.
This website is provided by the IAG Secretariat and the GGOS Coordinating Office, which are hosted by the BEV – Federal Office of Metrology and Surveying (Bundesamt für Eich- und Vermessungswesen) in Vienna, Austria.