NZ Topo - object class bridge_cl

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

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.

Representation specification

Representation specification showing bridge_cl

Click to enlarge image

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

See also: railway_cl road_cl track_cl

Class attributes

AttributeValue
Object classbridge_cl
Entity classBRIDGE
Additional entity classNot applicable
Object inheritancesimple_line
Entity sourceUS Standard Entity
Map series Topo50
LSLIFF object class8

Object attributes

AttributeLSLIFF code
Shapefile field
Data type
Attribute descriptionAttribute values*
name1001
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_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
bridge_use11008
use_1
string
The predominant traffic or utility that the bridge has been erected to carry.
vehicle
farm
train
tram
cablecar
foot traffic
bridge_use21009
use_2
string
A secondary category of traffic or utility using the bridge.
vehicle
farm
train
tram
cablecar
{empty}
bridge_construction_type1010
constr_typ
string
flyover
suspension
swing
trestle
{empty}
bridge_status1130
status
string
Values
derelictIn a state of disrepair, no longer safe to use.
derelict
disused
historic
{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
102012-08-28Updated map image and aerial view; added representation specification and example feature photographs
92012-08-28Added scale-specific definitions
82012-08-27Name attribute in UTF-8 format; added name_ascii attribute
72010-07-06removed attribute bridge_materials
62010-03-01removed attribute values from bridge_use and added name_macronated attribute
52003-06-30removed attribute value
42001-11-23Unspecified update
32001-07-01new attribute value
22000-11-01new attribute value
11999-03-01initial status