# Definition: Geodetic Survey

From Open Energy Information

# Geodetic Survey

Geodetic surveys study Earth’s geodynamical phenomena (e.g., crustal motion, gravitational field) using a satellite-borne global positioning system (GPS) in conjunction with terrestrial base stations. Geodetic surveys measure three-dimensional changes in crustal motion at the mm-scale. Measurements are typically made over very large areas (1010 km2) spanning years.^{[1]}

### Wikipedia Definition

- Geodesy ( ), also known as geodetics, is the science of accurately measuring and understanding three of Earth's fundamental properties—its geometric shape, its orientation in space, and its gravity field—as well as how they change over time. Geodynamical phenomena include crustal motion, tides, and polar motion, which can be studied by designing global and national control networks, applying space and terrestrial techniques, and relying on datums and coordinate systems.

- Also Known As
- Geodesy

##### References

- ↑ GPS and Space-Based Geodetic Methods (Blewitt 2007) from the book
*Treatise on Geophysics*