Summary of LINZ Tiers, Classes & Orders
The following tables summarise the Tiers and Classes used by LINZ to describe the network and local accuracy of coordinates that it provides
These values are formally defined in LINZS25006.
Tiers
The following Tiers are used by LINZ to describe network accuracy.
| Tier | Accuracy (m) |
|---|---|
| A | 0.05 |
| B | 0.10 |
| C | 0.15 |
| D | 0.20 |
| E | 0.25 |
| F | 0.35 |
| G | 0.50 |
| H | 1 |
| J | 2 |
| K | 5 |
| M | 10 |
| N | 20 |
| P | 50 |
| R | 100 |
Classes
The following Classes are used by LINZ to describe local accuracy.
| Class | Constant term (c) (m) | Distance dependent term (p) (m) |
|---|---|---|
| I | 0.003 | 1 x 10-8 |
| II | 0.003 | 3 x 10-8 |
| III | 0.003 | 1 x 10-7 |
| IV | 0.003 | 3 x 10-7 |
| V | 0.003 | 1 x 10-6 |
| VI | 0.01 | 3 x 10-6 |
| VII | 0.01 | 1 x 10-5 |
| VIII | 0.01 | 5 x 10-5 |
| IX | 0.02 | 1 x 10-4 |
| X | 0.03 | 1.5 x 10-4 |
| XI | 0.06 | 1.5 x 10-4 |
| XII | 0.30 | 6 x 10-4 |
| XIII | 0.60 | 1 x 10-3 |
| XIV | 1 | 3 x 10-3 |
| XV | 3 | 1 x 10-2 |
| XVI | 10 | 3 x 10-2 |
Landonline Orders
The following Landonline Orders are used by LINZ to classify the accuracy of coordinates in Landonline.
| Landonline Order | Horizontal Tier | Horizontal Class | Vertical Tier | Vertical Class |
|---|---|---|---|---|
| 0 | A | II | A | II |
| 1 | A | III | B | IV |
| 2 | B | V | E | VI |
| 3 | B | VI | F | VII |
| 4 | C | VII | F | VIII |
| 5 | C | VIII | F | IX |
| 6 | C | X | - | - |
| 7 | D | XI | - | - |
| 8 | G | XII | - | - |
| 9 | K | XIV | - | - |
| 10 | N | XV | - | - |
| 11 | P | XVI | - | - |
| 12a | - | - | - | - |
| 1V | - | - | E | VI |
| 2V | - | - | F | VII |
| 3V | - | - | F | IX |
| 4V | - | - | G | X |
| 5V | - | - | H | XII |
| 6Vb | - | - | - | - |
| a Order 12 includes all coordinates that do not achieve the Order 11 requirements b Order 6V includes all coordinates that do not achieve the Order 5V requirements |