NZ Topo - object class tunnel_cl

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

Description

An underground passage

Topo50 description

Tunnels are held in the data at their true size; tunnels less than 50m in length are shown on the printed maps with a length of 50m. Note that only prominent "livestock" tunnels are held in the data and shown on the printed maps.

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 tunnel_cl

Click to enlarge image

See also: railway_cl road_cl track_cl

Class attributes

AttributeValue
Object classtunnel_cl
Entity classTUNNEL
Additional entity classNot applicable
Object inheritancesimple_line
Entity sourceUS Standard Entity
Map series Topo50 Topo250
LSLIFF object class173

Object attributes

AttributeLSLIFF code
Shapefile field
Data type
Attribute descriptionAttribute values*
name1001
name
string
Name of the tunnel, 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.
"Wages Tunnel"
{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
tunnel_use11103
use1
string
The predominant traffic or utility that uses the tunnel. Where the predominant use is unknown this field is left empty
cablecar
foot traffic
livestock
river
tram
train
vehicle
{empty}
tunnel_use21104
use2
string
A secondary category of traffic or utility using the tunnel. Where no secondary use exists or is known, this field is left empty.
cablecar
foot traffic
livestock
river
tram
train
vehicle
{empty}
tunnel_type1105
type
string
Values
naturalA naturally occuring tunnel
{empty}A man-made tunnel
natural
{empty}
tunnel_status1106
status
string
Values
derelictIn a state of disrepair, no longer safe to use.
derelict
disused
under construction
{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
82014-11-14Removed 'canal' from tunnel_use1 and 2; canal tunnels are captured using pipeline_cl with 'underground' and 'water' attributes
72012-08-28Updated map image and aerial view; added representation specification and example feature photographs
62012-08-28Added scale-specific definitions
52012-08-16Name attribute in UTF-8 format; added name_ascii attribute
42010-03-01removed values from tunnel_use1 and tunnel_use2 and added name_macronated attribute
32001-11-23unspecified update
22000-07-31new attribute
11999-03-01intial status