geodesy

Also known as geodetics, geodetic science

thumb|upright=1.05|A modern instrument for geodetic measurements using satellites

AI overview

Geodesy is the science of measuring and mapping Earth's shape, size, and physical features with high precision. It matters because accurate geodetic data is essential for everything from creating reliable maps and managing land boundaries to supporting satellite technology and understanding how our planet is changing over time.

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Image: Gravity anomalies on Earth.jpg

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Commons category: Geodesy
Commons gallery: Geodesy
described at URL: www.geoinformatik.uni-rostock.de/einzel.asp?ID=761

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~26 min read

Article

18 sections

Contents

History
Definition
Geoid and reference ellipsoid
Coordinate systems in space
Coordinate systems in the plane
Heights
Geodetic datums
Positioning
Geodetic problems {{anchor|Problems}}
Observational concepts
Measurements
Units and measures on the ellipsoid
Temporal changes
Notable geodesists
See also
References
Further reading
External links

thumb|upright=1.05|A modern instrument for geodetic measurements using satellites

Geodesy (, ) or geodetics is the science of measuring and representing the geometry, gravity, and spatial orientation of the Earth in temporally varying 3D space. It is called planetary geodesy when studying other astronomical bodies, such as planets or circumplanetary systems. Geodetic job titles include geodesist and geodetic surveyor.