This page summarises the main characteristics of the network.
To enable the link between official geodetic and vertical datums and international reference systems to be determined and monitored.
At least one geodetic datum reference mark (GDRM) on the stable part of each tectonic plate (Pacific, Australian, Antarctic)
Vertical datum reference mark (VDRM) to be co-located with each GDRM
Tier: Horiz A (0.05 m), Vert A (0.05 m)
Class: Horiz II (0.003 m, 3x10-8m/m), Vert II (0.003 m, 3x10-8m/m)
Class evaluation radius: all NRF marks
GDRM normally continuous GNSS
VDRM normally absolute gravity
May co-locate with other observation systems (VLBI, DORIS)
To enable GNSS collection (GDRM)
To enable absolute gravity collection (VDRM)
Data available from LINZ website
No physical access to mark