NZ Topo - object class ladder_cl
This page describe the ladder_cl object class used to represent objects in the NZTopo topographic database.
A set of steps, or rungs, inserted in two uprights to serve as a means of ascending a cliff-face
ladder_cl is used when the feature is large enough to be captured at 1:50,000 as a line feature. Ladders were originally captured by surveyors in the field. As they are not always visible on imagery, these features are left unchanged unless more current information becomes available
|Additional entity class||Not applicable|
|Entity source||Proposed NZ Std Entity|
|LSLIFF object class||64|
|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.
|5||2012-08-28||Updated map image and aerial view; added representation specification and example feature photographs|
|4||2012-08-28||Added scale-specific definitions|