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

Map image

Click to enlarge image

Representation specification

Click to enlarge image

Example

Click to enlarge image

Aerial view

Click to enlarge image

See also: spillway_edge weir_cl

Class attributes

Attribute	Value
Object class	dam_cl
Entity class	DAM
Additional entity class	Not applicable
Object inheritance	simple_line
Entity source	US Standard Entity
Map series	Topo50 Topo250
LSLIFF object class	28

Object attributes

Attribute	LSLIFF code Shapefile field Data type	Attribute description	Attribute values*
name	1001 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_macronated	1140 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/regulatory/place-names/find-place-name/find-m%C4%81ori-place-names-dual-names-and-alternative-names for a list of places or feature names within New Zealand that are gazetted and include macrons	Y N
dam_status	1025 dam_status string		old disused ruins {empty}
name_ascii	9000 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.
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.	"3254886"

* See explanation of attribute values for more information about how attribute values are represented.

Change log

Feature version	Revised	Description
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
4	2012-08-16	Name attribute in UTF-8 format; added name_ascii attribute
3	2010-03-01	Added name_macronated attribute
2	2001-11-23	Unspecified update
1	1999-03-01	intial status