NZ Topo - object class marine_farm_poly

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


An area in the sea, used for aquatic cultivation.

Topo50 description

Only those significant by their size or location are held in the data and shown on the printed maps. Groups of close marine farm structures are held in the data and shown on the printed maps as polygons.

Representation specification

Representation specification showing marine_farm_poly

Click to enlarge image

See also: marine_farm_cl fish_farm_poly

Class attributes

Attribute Value
Object class marine_farm_poly
Additional entity class Not applicable
Object inheritance simple_area
Entity source Proposed NZ Entity
Map series Topo50
LSLIFF object class 319

Object attributes

Attribute LSLIFF code
Shapefile field
Data type
Attribute description Attribute values*
marine_farm_species_cultivated 1048
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 object class change
3 2008-04-10 Removed reference to seed and void objects
2 2001-11-23 Unspecified update
1 1999-03-01 intial status