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

Object classtank_poly
Entity classTANK
Additional entity classNot applicable
Object inheritancesimple_area
Entity sourceUS Standard Entity
Map series Topo50 Ant50
LSLIFF object class349

Object attributes

AttributeLSLIFF code
Shapefile field
Data type
Attribute descriptionAttribute values*
surge chamber
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 versionRevisedDescription
62012-08-28Updated map image and aerial view; added representation specification and example feature photographs
52012-08-28Added scale-specific definitions
42010-03-01removed attribute values from tank_item_stored
32008-04-10removed reference to seed and void objects
22001-11-23unspecified update
11999-03-01intial status