NZ Topo - object class snow_poly

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


A region of permanent snow.

Topo50 description

Permanent snow and ice is defined as that which remains after the summer thaw. Areas of ice and snow were defined by the Department of Science and Industrial Research (DSIR) during the mid 1980’s over the entire country. Some areas have been updated from studies undertaken at the University of Otago . To keep the database in line with international entity specifications areas of snow and ice will be captured using both snow_poly and ice_poly objects

Topo250 description

Only those areas significant by their size are held in the Topo250 data and shown on the Topo250 printed maps; these are a generalised subset of those shown on the Topo50 series

Representation specification

Representation specification showing snow_poly

Click to enlarge image

See also: ice_poly

Class attributes

Attribute Value
Object class snow_poly
Entity class SNOWFIELD
Additional entity class Not applicable
Object inheritance simple_area
Entity source US Standard Entity
Map series Topo250 Ant50 Topo50 Topo500
LSLIFF object class 346

Object attributes

This object class does not have attributes.

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 Added name_macronated attribute
3 2008-04-10 Removed reference to seed and void objects
2 2001-08-21 comments
1 1999-03-01 intial status