Gravity and the Geoid
Gravity varies with latitude, elevation, geology and time. Gravity field models are used to compute a geoid model, which can be used a reference for a vertical datum.
The gravity datasets used to create NZGeoid2016 include: terrestrial, ship-track, airborne and satellite. The datasets are combined to create the Bouguer gravity field map for New Zealand.

Last Updated:
27 June 2016