NZ Topo - object class siphon_poly
This page describe the siphon_poly object class used to represent objects in the NZTopo topographic database.
A pipe system comprising a rising leg and a falling leg, typically in the shape of an inverted U. Works on atmospheric pressure
Only those significant by their size or location are held in the data and shown on the printed maps. Small but significant siphons are captured as point features
See also: canal_poly
|Additional entity class||Not applicable|
|Entity source||Proposed NZ Std Entity|
|LSLIFF object class||345|
|Attribute description||Attribute values*|
|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.
|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|
|3||2008-04-10||removed reference to seed and void objects|