NZ Topo - object class lake_poly

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

Description

Any standing body of fresh inland water.

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 lake_poly

Click to enlarge image

Class attributes

AttributeValue
Object classlake_poly
Entity classLAKE
Additional entity classNot applicable
Object inheritancesimple_area
Entity sourceUS Standard Entity
Map series Topo250 Ant50 Topo50
LSLIFF object class316

Object attributes

AttributeLSLIFF code
Shapefile field
Data type
Attribute descriptionAttribute values*
name1001
name
string
Name of the lake, 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.
"Lake Pounui"
{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
elevation1021
elevation
real
The elevation of the water body above mean sea level.
{empty}
lake_group_name1044
grp_name
string
The name of the group of lakes that this individual lake belongs, 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.
"XYZ Lakes"
{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
lake_use1045
lake_use
string
hydro-electric
evaporation
reservoir
{empty}
lake_temperature1046
temperatur
string
hot
{empty}
lake_perenniality1047
perennial
string
Values
dryThe lake does not contain water most of the time
seasonalThe lake contains water seasonally through the year
{empty}The lake contains water throughout the year
dry
seasonal
{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.
lake_group_name_ascii9002
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 field, 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
22001-07-01new attribute
11999-03-01intial status