NZ Topo - object class ladder_cl
This page describe the ladder_cl object class used to represent objects in the NZTopo topographic database.
Description
A set of steps, or rungs, inserted in two uprights to serve as a means of ascending a cliff-face
Topo50 description
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
See also: track_cl ladder_pnt
Class attributes
| Attribute | Value |
|---|---|
| Object class | ladder_cl |
| Entity class | LADDER |
| Additional entity class | Not applicable |
| Object inheritance | simple_line |
| Entity source | Proposed NZ Std Entity |
| Map series | Topo50 |
| LSLIFF object class | 64 |
Object attributes
| Attribute | LSLIFF code Shapefile field Data type |
Attribute description | Attribute values* | ||||
|---|---|---|---|---|---|---|---|
| ladder_uprights_materials | 1039 materials string |
Values
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|
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| UFID | 1000 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. |
|
* See explanation of attribute values for more information about how attribute values are represented.
Change log
| Feature version | Revised | Description |
|---|---|---|
| 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 |
| 3 | 2001-11-23 | Unspecified update |
| 2 | 2001-08-21 | comments |
| 1 | 1999-03-01 | intial status |