# Definition: Geodetic Survey

# 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 (pronunciation: /dʒiːˈɒdᵻsi/), — also known as geodetics, geodetic engineering or geodetics engineering — a branch of applied mathematics and earth sciences, is the scientific discipline that deals with the measurement and representation of the Earth (or any planet), 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.

- Also Known As
- Geodesy

##### References

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