NZ Topo - object class dam_cl

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

Description

A barrier constructed across a watercourse to control the flow or raise the level of water

Topo50 description

Only those significant either by their size or location are held in the data and shown on the printed maps. The line held in the data and shown on the printed maps represents the top of the dam. Dams are held in the data at their true size; dams less than 50m in length are shown on the printed maps with a length of 50m.

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 those shown on the Topo50 series

Representation specification

Representation specification showing dam_cl

Click to enlarge image

See also: spillway_edge weir_cl

Class attributes

AttributeValue
Object classdam_cl
Entity classDAM
Additional entity classNot applicable
Object inheritancesimple_line
Entity sourceUS Standard Entity
Map series Topo50 Topo250
LSLIFF object class28

Object attributes

AttributeLSLIFF code
Shapefile field
Data type
Attribute descriptionAttribute values*
name1001
name
string
The name of the feature, where known. Text data from July 2012 will be in UTF-8 format. If your system is not UTF-8 compliant, you will need to use the name_ascii attribute, which has had any macronated vowels removed. UTF-8 stands for Unicode Transformation Format-8. It is an octet (8-bit) lossless encoding of Unicode characters. UTF-8 encodes each Unicode character as a variable number of 1 to 4 octets, where the number of octets depends on the integer value assigned to the Unicode character. It is an efficient encoding of Unicode documents that use mostly US-ASCII characters because it represents each character in the range U+0000 through U+007F as a single octet. UTF-8 is the default encoding for XML.
"Clyde Dam"
{empty}
name_macronated1140
macronated
boolean
Indicates whether the entry in the name_ascii field contains a macronated vowel. Where the value is "Y" go to http://www.linz.govt.nz/placenames/find-names/macrons/index.aspx for a list of places or feature names within New Zealand that are gazetted and include macrons
Y
N
dam_status1025
dam_status
string
old
disused
ruins
{empty}
name_ascii9000
name_ascii
string
Text data from July 2012 will be in UTF-8 format. If your system is not UTF-8 compliant, you will need to use this attribute, which has had any macronated vowels removed.
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
42012-08-16Name attribute in UTF-8 format; added name_ascii attribute
32010-03-01Added name_macronated attribute
22001-11-23Unspecified update
11999-03-01intial status