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Point::earth    Geodesy::which    Points::germany    Plane::datum    Geodetic::surface    Geodesy::system

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An old geodetic pillar (1855) at Ostend, Belgium
A Munich archive with lithography plates of maps of Bavaria

Geodesy ({{#invoke:IPAc-en|main}}),<ref>OED</ref> — also known as geodetics or geodetics engineering — a branch of applied mathematics <ref>Merriam-Webster Dictionary</ref> and earth sciences, is the scientific discipline that deals with the measurement and representation of the Earth, including its gravitational field, in a three-dimensional time-varying space. Geodesists also study geodynamical phenomena such as crustal motion, tides, and polar motion. For this they design global and national control networks, using space and terrestrial techniques while relying on datums and coordinate systems.


Geodesy sections
Intro   Definition    History    Geoid and reference ellipsoid    Coordinate systems in space    Heights    Geodetic data    Point positioning    Geodetic problems    Geodetic observational concepts    Geodetic measurements    Units and measures on the ellipsoid    Temporal change    Famous geodesists    See also    References    Further reading   External links  

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