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Pre-2010 geodetic coordinate orders

Until May 2010, geodetic coordinates were categorised using orders based on coordinate observation and survey significance. This framework was replaced in 2010 by the Standard for the Geospatial Accuracy Framework (LINZS25005) and Standard for Tiers, Classes and Orders of LINZ Data (LINZS25006).

Find out about current coordinate orders.

Until May 2010, New Zealand Geodetic Datum 2000 (NZGD2000) (https://linz.govt.nz/data/geodetic-system/datums-projections-and-heights/geodetic- datums/new-zealand-geodetic-datum-2000-nzgd2000) and Ross Sea Region Geodetic Datum 2000 (RSRGD2000) (https://linz.govt.nz/data/geodetic-system/datums- projections-and-heights/geodetic-datums/ross-sea-region-geodetic-datum) coordinates were described by a system of orders based on coordinate observation and the role the survey mark played in the geodetic control and cadastral survey networks.

New Zealand Geodetic Datum 2000

Ross Sea Region Geodetic Datum 2000

  • Orders 0 to 5 had different horizontal and vertical accuracy tolerances, while for Orders 6 to 10 the horizontal and vertical tolerances were the same.
  • Orders 0 to 7 were survey accurate and were defined by the relative accuracy between marks.
  • Order 6 was applied to Landonline survey accurate cadastral traverse, and order 7 was applied to Landonline survey accurate boundaries.  
  • The accuracy for orders 8 to 10 was indicative only.
  • Orders 6 to 7 were not used for marks in the RSRGD2000.

This order scheme was replaced in 2010 by the Standard for the Geospatial Accuracy Framework (LINZS25005) and Standard for Tiers, Classes and Orders of LINZ Data (LINZS25006).

Standard for the Geospatial Accuracy Framework

Standard for Tiers, Classes, and Orders of LINZ Data

OrderDescriptionAccuracy (95% CI)
0International Control NetworkHoriz 0.003m + 0.01ppm
Vert 0.003m + 0.03ppm
1National Control NetworkHoriz 0.003m + 0.1ppm
Vert 0.003m + 0.3ppm
2Regional Control NetworkHoriz 0.003m + 1ppm
Vert 0.01m + 3ppm
3Local Control NetworkHoriz 0.01m + 3ppm
Vert 0.01m + 10ppm
4Urban Control NetworkHoriz 0.01m + 10ppm
Vert 0.01m + 30ppm
5Cadastral Control (includes new control; resurveyed control; adopted and re-adjusted NZGD1949 and Old Cadastral control traverses)Horiz 0.01m + 30ppm
Vert 0.01m + 100ppm
6Cadastral traverses that comply with the Surveyor-General's Rules for Cadastral Survey0.02m + 100ppm
7(i)Class I cadastral boundaries and traverses that fail Order 6 tests0.04m + 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) tests0.10m + 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) tests0.25m + 100ppm
8Transformed 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)
9Converted medium accuracy DCDB data (source codes 2-10)5m (nominal)
10Transformed Order 6 NZGD1949 control, converted low accuracy DCDB data (source codes 11,12)50m (nominal)
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