NZGD2000 and RSRGD2000 Orders

NZGD2000 and RSRGD2000 positions are described by three-dimensional coordinates (latitude, longitude, ellipsoidal height). The accuracy of a survey mark is indicated by its Order. Orders are classifications based on the quality of the coordinate, and the role of the survey mark in the development of the geodetic control and cadastral survey framework.

Orders 0 to 5 have different horizontal and vertical accuracy tolerances (as specified below). For Orders 6 to 10 the horizontal and vertical tolerances are the same.

Orders 0-7 are considered to be survey accurate and the accuracy defines the relative accuracy between marks. Orders 6 and 7 are applied to Landonline survey accurate cadastral traverse and boundaries respectively. The accuracy defined for Orders 8-10 is indicative only.

Orders 6-7 are not used for marks in the RSRGD2000.

A mark may have coordinates in multiple geodetic and vertical datums with different Orders in each.

Order	Description	Accuracy (95% CI)
0	International Control Network	Horiz 0.003m + 0.01ppm Vert 0.003m + 0.03ppm
1	National Control Network	Horiz 0.003m + 0.1ppm Vert 0.003m + 0.3ppm
2	Regional Control Network	Horiz 0.003m + 1ppm Vert 0.01m + 3ppm
3	Local Control Network	Horiz 0.01m + 3ppm Vert 0.01m + 10ppm
4	Urban Control Network	Horiz 0.01m + 10ppm Vert 0.01m + 30ppm
5	Cadastral Control (includes new control; resurveyed control; adopted and re-adjusted NZGD1949 and Old Cadastral control traverses)	Horiz 0.01m + 30ppm Vert 0.01m + 100ppm
6	Cadastral traverses that comply with the Surveyor-General's Rules for Cadastral Survey	0.02m + 100ppm
7(i)	Class I cadastral boundaries and traverses that fail Order 6 tests	0.04m + 100ppm
7(ii)	Class II cadastral boundaries, Class I boundaries that fail Order 7(i) tests and traverses that fail Order 6 and 7(i) tests	0.10m + 100ppm
7(iii)	Class III cadastral boundaries, Class II boundaries that fail Order 7(ii) tests, Class I boundaries that fail Order 7(i) and 7(ii) tests and traverses that fail Order 6, 7(i) and 7(ii) tests	0.25m + 100ppm
8	Transformed NZGD1949 control, Class IV cadastral data, Class I, II and III boundaries and traverses that fail Orders 6, 7(i), 7(ii) and 7(iii) tests, converted higher accuracy DCDB data (source code 1)	0.5 m (nominal)
9	Converted medium accuracy DCDB data (source codes 2-10)	5m (nominal)
10	Transformed Order 6 NZGD1949 control, converted low accuracy DCDB data (source codes 11,12)	50m (nominal)