Continuously operating GNSS station or CORS site. Mark is unable to be physically occupied. Horizontal reference point is the centre of 5/8ö thread. The vertical reference is the plate at top of pillar. 0.055m spacer is between GNSS antenna reference point (ARP) and vertical reference plate (antenna height). Pillar plate is 735 mm above the top of previous mark (Roys Hill - A4F2). For more information see http://www.linz.govt.nz/positionz.