NZ Topo - object class trig_pnt

This page describe the trig_pnt object class used to represent objects in the NZTopo topographic database.


A structure on top of a hill, usually coloured black and white, used as a physical reference point by surveyors to determine location. The symbol shown on the map includes the elevation and trig identification code for beaconed trig stations. These topographic trig points are derived from New Zealand geodetic marks data which can also be accessed through the LINZ Data Service: [NZ Geodetic Marks]( and [NZ Geodetic Vertical Marks](

Topo50 description

Only beaconed trigs are held in the data and shown on the printed maps.

Representation specification

Representation specification showing trig_pnt

Click to enlarge image

Class attributes

Attribute Value
Object class trig_pnt
Entity class TRIG
Additional entity class Not applicable
Object inheritance simple_point
Entity source US Standard Entity
Map series Topo50
LSLIFF object class 196

Object attributes

Attribute LSLIFF code
Shapefile field
Data type
Attribute description Attribute values*
name 1001
Trig identification code for beaconed trig stations.
name_macronated 1140
Indicates whether the entry in the name_ascii field contains a macronated vowel. Where the value is "Y" go to for a list of places or feature names within New Zealand that are gazetted and include macrons
name_ascii 9000
Text data from July 2012 will be in UTF-8 format. If your system is not UTF-8 compliant, you will need to use this attribute, which has had any macronated vowels removed.
UFID 1000
A unique identifier for use on Topo50 data in the LINZ Data Service. This is not a universal ID. The intention is to manage these ID’s as persistent, however this is not guaranteed and there will be instances where what appears to be a minor change to a feature may result in a new ID being assigned.
elevation 1021
Elevation of the trig station.

* See explanation of attribute values for more information about how attribute values are represented.

Change log

Feature version Revised Description
1 2020-04-01 Added new object class.