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This dataset was first added to Stats NZ Geographic Data Service on 01 Dec 2021.
eng
utf8
dataset
dataset
Geospatial Team
Stats NZ
0508 525 525
geography@stats.govt.nz
https://datafinder.stats.govt.nz/
owner
2021-11-16
ISO 19139 Geographic Information - Metadata - Implementation Specification
2007
geometryOnly
point
2244
2193
EPSG
7.9.4(9.0.0)
SA202022_V1_00_Centroid_True
mapDigital
The "true" centroid is the centre of mass of that polygon, such that if some flat substance of uniform thickness and density were cut into the shape of that polygon, then that object would balance at the centroid. The centroid is a useful way of summarizing the location of a set of polygons as points, particularly when used for comparative analysis. Note that the centroid could potentially fall outside the SA2 polygon, depending on the shape of the polygon.The dataset contains the EASTING and NORTHING attributes of the centroid point in NZGD2000 New Zealand Transverse Mercator (EPSG:2193) and LATITUDE and LONGITUDE of the centroid point in decimal degrees in WGS1984 (EPSG:4326) projection.
This dataset contains the true centroid point layer for the annually released statistical area 2 (SA2) boundaries as at 1 January 2022.
Stats NZ
Geospatial Team
Stats NZ
0508 525 525
geography@stats.govt.nz
https://datafinder.stats.govt.nz/
owner
Centroids
theme
Downloadable Data
Creative Commons Attribution 4.0 International (CC BY 4.0)
vector
eng
utf8
boundaries
Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362
true
true
true
File Geodatabase Feature Class
dataset
SA1s are based on the meshblock pattern. Non-alignment of meshblock to cadastral boundaries is one of a number of reasons for meshblock boundary adjustments. Other reasons include requests from local authorities, Local Government Commission, Electoral Representation Commission, and to make census enumeration processes easier. From the meshblock pattern, higher geographies, including the 2021 SA1 pattern, were dissolved using the dissolve tool in the Arc GIS suite. To derive the SA1 boundaries clipped to the coastline, meshblock polygons were dissolved to exclude meshblocks with a land/water attribute of Inlet or Oceanic.