NZ Topo - object class bridge_cl
This page describe the bridge_cl object class used to represent objects in the NZTopo topographic database.
A structure erected over a depression or obstacle to carry traffic or some facility such as a pipeline.
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.
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.
Important information: Other similar-type structures are handwire,walkwire, chain ladder.
|Additional entity class||Not applicable|
|Entity source||US Standard Entity|
|Map series||Topo50 Topo250|
|LSLIFF object class||8|
|Attribute description||Attribute values*|
|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.||
|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||
|The predominant traffic or utility that the bridge has been erected to carry.||
|A secondary category of traffic or utility using the bridge.||
|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.|
|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.||
* See explanation of attribute values for more information about how attribute values are represented.
|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|
|3||2001-07-01||new attribute value|
|2||2000-11-01||new attribute value|