Description

A structure erected over a depression or obstacle to carry traffic or some facility such as a pipeline.

Topo50 description

All bridges are held in the data at their true size; bridges less than 50m in length are represented on the printed maps as being 50m long. Where a bridge is in a residential area, the bridge may not be shown on the printed map. Road bridges: with the exception of less prominent bridges on rural properties, all known road bridges are held in the data. Foot and rail bridges: only those significant either by their size or location are held in the data and shown on the printed maps.

Topo250 description

Selected bridges are held in the data and shown on the maps. Bridges will be limited to solitary, large bridges where the lack of other features (like a road or track) means there would be insufficient information about access.

Map image

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Representation specification

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Example

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Aerial view

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Important information: Other similar-type structures are handwire,walkwire, chain ladder.

See also: railway_cl road_cl track_cl

Class attributes

Attribute	Value
Object class	bridge_cl
Entity class	BRIDGE
Additional entity class	Not applicable
Object inheritance	simple_line
Entity source	US Standard Entity
Map series	Topo50 Topo250
LSLIFF object class	8

Object attributes

Attribute	LSLIFF code Shapefile field Data type	Attribute description	Attribute values*
name	1001 name string	The name of the bridge, 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.	"Tobins Bridge" {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
bridge_use1	1008 use_1 string	The predominant traffic or utility that the bridge has been erected to carry.	vehicle farm train tram cablecar foot traffic
bridge_use2	1009 use_2 string	A secondary category of traffic or utility using the bridge.	vehicle farm train tram cablecar {empty}
bridge_construction_type	1010 constr_typ string		flyover suspension swing trestle {empty}
bridge_status	1130 status string	Values derelict In a state of disrepair, no longer safe to use.	derelict disused historic {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
10	2012-08-28	Updated map image and aerial view; added representation specification and example feature photographs
9	2012-08-28	Added scale-specific definitions
8	2012-08-27	Name attribute in UTF-8 format; added name_ascii attribute
7	2010-07-06	removed attribute bridge_materials
6	2010-03-01	removed attribute values from bridge_use and added name_macronated attribute
5	2003-06-30	removed attribute value
4	2001-11-23	Unspecified update
3	2001-07-01	new attribute value
2	2000-11-01	new attribute value
1	1999-03-01	initial status