NZ Topo - object class tank_poly

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


A structure used for the storage of fluids.

Topo50 description

Only those significant by their size or location are held in the data and shown on the printed maps. Of these, tank _poly is used when the area is large enough to be captured at 1:50,000 as an area feature. Smaller features are captured as a point. Tanks in the CBD are not held in the data or shown on the printed maps.

Representation specification

Representation specification showing tank_poly

Click to enlarge image

See also: tank_pnt

Class attributes

Attribute Value
Object class tank_poly
Entity class TANK
Additional entity class Not applicable
Object inheritance simple_area
Entity source US Standard Entity
Map series Topo50 Ant50
LSLIFF object class 349

Object attributes

Attribute LSLIFF code
Shapefile field
Data type
Attribute description Attribute values*
tank_item_stored 1097
tank_type 1098
surge chamber
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.

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

Change log

Feature version Revised Description
6 2012-08-28 Updated map image and aerial view; added representation specification and example feature photographs
5 2012-08-28 Added scale-specific definitions
4 2010-03-01 removed attribute values from tank_item_stored
3 2008-04-10 removed reference to seed and void objects
2 2001-11-23 unspecified update
1 1999-03-01 intial status