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.
Important information: Other similar-type structures are handwire,walkwire, chain ladder.
|Additional entity class||Not applicable|
|Entity source||US Standard Entity|
|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/placenames/find-names/macrons/index.aspx 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|