Description

A sheet of salt water separated from the open sea by sand, shingle banks or a road embankment. The sheet of water between an offshore reef, esp. of coral, and mainland. The sheet of water within a ring or horseshoe shaped atoll.

Topo50 description

Only those significant either by their size or location are held in the data and shown on the printed maps. Where a sheet of salt water is separated from the open sea by a shingle bank or road embankment, and where a culvert permitting the flow of water between the two (either visible on imagery or whose location is known) exists, then the separated area is captured as coastline, not lagoon_poly.

Map image

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Representation specification

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Example

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Aerial view

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Class attributes

Attribute	Value
Object class	lagoon_poly
Entity class	LAGOON
Additional entity class	Not applicable
Object inheritance	simple_area
Entity source	US Standard Entity
Map series	Topo50
LSLIFF object class	315

Object attributes

Attribute	LSLIFF code Shapefile field Data type	Attribute description	Attribute values*
name	1001 name string	The name of the lagoon, 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.	"Aotea Lagoon" {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
elevation	1021 elevation real	The elevation of the water body above mean sea level	{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
8	2013-06-07	Extra information provided in the Topo50 Description field
7	2012-08-28	Updated map image and aerial view; added representation specification and example feature photographs
6	2012-08-28	Added scale-specific definitions
5	2012-08-16	Name attribute in UTF-8 format; added name_ascii attribute
4	2010-03-01	Added name_macronated attribute
3	2008-04-10	Removed reference to seed and void objects
2	2001-11-23	Unspecified update
1	1999-03-01	intial status