LINZ announced that from 27 June 2016 New Zealand Vertical Datum 2016 (NZVD2016) replaces NZVD2009 as the official national vertical datum for New Zealand. NZVD2016 is defined by the NZGeoid2016 geoid.
Heights in terms of NZVD2016 are in the normal-orthometric height system. The NZVD2016 datum covers the New Zealand continental shelf area between 160°E –170°W and 25°S – 60°S.
To access the Trimble compatible geoid models using the new 2016 datum, go to the Trimble website, Under Product Resources (on the right), click on Downloads, then click on Geoid Files and locate New Zealand geoid 2016.