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Regional Models

New Zealand (NZGEOID2016)


  Author: M.J. Amos     Created: 2016    Resp: M.J. Amos  
      Status: PUBLIC    
Description:
The New Zealand Quasigeoid 2016 (NZGeoid2016) is the official gravimetric model for New Zealand. It is distributed by Land Information New Zeland (LINZ), it is produced on a one arc-minute grid (approximately 1.8 kilometres) over the New Zealand continental shelf (160° E to 170° W, 25° S to 60° S) and it is referred to the GRS80 ellipsoid. It was calculated by enhancing the EIGEN-6C4 global model using a combination of terrestrial, ship-track, airborne and satellite based gravity observations, while GPS-levelling observations were not used. The NZGeoid2016 model has an expected accuracy of better than 3 centimetres based on comparisons with GPS-levelling in urban areas.

References:
M.J. Amos (2016). Improving New Zealand’s Geoid Based Datum with Airborne Gravimetry. Presented at FIG Working Week Christchurch, New Zeland.


New Zealand