This dataset is the definitive set of area unit boundaries for 2012 as defined by Statistics New Zealand.
Area units are aggregations of adjacent meshblocks with coterminous boundaries to form a single unbroken surface area (land and/or water). Exceptions to this rule are some area units comprising collections of geographically related inlets and marinas. Area units are non-administrative areas intermediate in size between meshblocks and territorial authorities. In an urban situation area units are often a collection of city blocks while in rural situations area units may be equated to localities or communities. Area Units must either define or aggregate to define urban areas, rural centres, statistical areas, territorial authorities and regional councils. Each area unit must be a single geographic entity with a unique name.
The area unit pattern is revised once each five years in the year immediately prior to the taking of a Census of Population and Dwellings. There may also be changes in other years, in conjunction with local body boundary changes. Statistics New Zealand maintains a concordance file to ensure that boundaries relating to earlier area unit patterns can also be generated.
Area Unit Totals
As at 1stJuly 2007, Digital Boundary data became freely available.
Area units are based on the meshblock pattern. Once all changes are prepared, Statistics NZ then passes the requests for changes to the meshblock pattern onto LINZ for the electronic changes to take place.
Non-alignment of meshblock and cadastral boundaries are 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 of Population and Dwellings enumeration processes easier.
From the meshblock pattern, higher geographies, including the 2011 area unit pattern were dissolved using the dissolve tool in the Arc GIS suite to create multiple output datasets.
To Derive the area unit boundaries clipped to the coastline, meshblock polygons were dissolved to include or exclude land/water attributes attached to each meshblock.
These were then dissolved to higher geographies, including the 2012 are unit pattern using the dissolve tool in the ArcGIS suite.
These conditions of supply apply to all users of Statistics New Zealand digital boundaries effective 1 July 2007. Permitted usesStatistics New Zealand must be acknowledged as the source of the boundaries.Uses not permittedUsers are not permitted to change the accuracy of the boundaries and supply them to another party.LiabilityWhile care has been taken to compile these boundary coordinates, Statistics New Zealand gives no warranty that the data supplied is free from error. Statistics New Zealand shall not be liable for any loss suffered through the use, directly or indirectly, of any information, product or service.