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.

Bouguer gravity field map for New Zealand
Bouguer gravity field map for New Zealand
Last Updated: 27 June 2016