NZ Topo - object class island_poly

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

Description

Area of dry or relatively dry land surrounded by water or low wetland

Topo50 description

island_poly is used to capture all the significant (with respect to size) offshore and inland (eg within a lake or river) islands of New Zealand. Also used for the shores of the sub-antartic and islands of the Ross Sea Region. The North, South and Stewart Islands are all held as coastline features. The island_poly boundary for offshore islands is mean high water, MHW - see coastline for full explanation of MHW. Where an island_poly is close to a road, the printed map may only show the road representation; both features are held in the data. Where the island_poly is a wharf edge, the printed map may only show the wharf representation; again, both features are held in the data

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 island_poly

Click to enlarge image

Important information: Permits may be required to visit some sensitive and special islands and areas. Contact the Department of Conservation to see if you need to apply for a permit.

See also: coastline

Class attributes

AttributeValue
Object classisland_poly
Entity classISLAND
Additional entity classNot applicable
Object inheritancesimple_area
Entity sourceUS Standard Entity
Map series Topo250 Ant50 Topo50
LSLIFF object class314

Object attributes

AttributeLSLIFF code
Shapefile field
Data type
Attribute descriptionAttribute values*
name1001
name
string
The name of the island, 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.
"Matiu/Somes Island"
{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
island_group_name1036
grp_name
string
The name of the group of islands that this island belongs to, 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.
"Bream Islands"
{empty}
group_name_macronated1141
grp_mcrnted
boolean
Indicates whether the entry in the group_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
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.
island_group_name_ascii9001
grp_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
92012-08-28Updated map image and aerial view; added representation specification and example feature photographs
82012-08-28Added scale-specific definitions
72012-08-16Name attribute in UTF-8 format; added name_ascii attribute
62010-07-06Added group_name_macronated attribute
52010-03-01Added name_macronated attribute
42008-04-10Removed reference to seed and void objects
32001-11-23Unspecified update
22000-03-31comments
11999-03-01intial status