NZ Topo - object class powerline_cl

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

Description

A cable or cables supported by poles or towers for the transmission of electricity

Topo50 description

Not all powerlines are held in the data or shown on the printed maps. Eg. where a powerline (on poles) runs closely parallel to a road, it may not the held in the data; and where two powerlines are very close, only one may be held in the data in the data or shown on the printed map. Short sections of powerline are not generally held in the data or shown on the printed maps. Power lines are classified according to the type of structure supporting the line, rather than by the voltage carried. NOTE that the circles on the powerline-on-poles symbol do not represent the positions of the supports.

Topo250 description

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

Representation specification

Representation specification showing powerline_cl

Click to enlarge image

Important information: Not all aerial wires, cableways and obstructions that could be hazardous to aircraft are held in the data or shown on the printed maps

See also: pylon_pnt

Class attributes

AttributeValue
Object classpowerline_cl
Entity classTRANSMISSION LINE
Additional entity classNot applicable
Object inheritancesimple_line
Entity sourceUS Standard Entity
Map series Topo50 Topo250
LSLIFF object class96

Object attributes

AttributeLSLIFF code
Shapefile field
Data type
Attribute descriptionAttribute values*
powerline_support_type1067
support_ty
string
pole
pylon
UFID1000
t50_fid
integer
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.
"3254886"

* 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
42010-03-01Updated comments section
32001-11-23Unspecified update
22001-08-21comments
11999-03-01intial status