Geodetic coordinates

Geodetic coordinates are a type of curvilinear orthogonal coordinate system used in geodesy based on a reference ellipsoid. They include geodetic latitude (north/south) $ϕ$ , longitude (east/west) $λ$ , and ellipsoidal height $h$ (also known as geodetic height^[1]). The triad is also known as Earth ellipsoidal coordinates^[2] (not to be confused with ellipsoidal-harmonic coordinates).

^ National Geodetic Survey (U.S.).; National Geodetic Survey (U.S.) (1986). Geodetic Glossary. NOAA technical publications. U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, Charting and Geodetic Services. p. 107. Retrieved 2021-10-24.
^ Awange, J.L.; Grafarend, E.W.; Paláncz, B.; Zaletnyik, P. (2010). Algebraic Geodesy and Geoinformatics. Springer Berlin Heidelberg. p. 156. ISBN 978-3-642-12124-1. Retrieved 2021-10-24.