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Area unit
Classification of area unit

The standard classification of area unit is a flat classification and contains 2,020 categories. It is released annually on 1 January, but there are not always changes from the previous classification.

To facilitate time series analysis of data, correspondence files between area units 2006 and 2013 and area units 2001 and 2006 are available. See 'Available files'.

Classification Changes from previous year
Area unit 2013  Minor review of Christchurch city and Selwyn and Waimakariri districts following the Canterbury earthquakes.
Area unit 2011            Minor Review
Area unit 2006 Extensive review
Area unit 2004 531500 'Piopio Community' renamed 'Piopio'
Area unit 2001 Extensive review

Area unit 2013

Classification Area Unit 2013
Abbreviation AU13
Version V1.0
Effective date 01/01/2013

Area unit 2011

Classification Area Unit 2011
Abbreviation AU11
Version V1.0
Effective date 01/01/2011

Area unit 2006

Classification Area Unit 2006
Abbreviation AU06
Version V1.0
Effective date 01/01/2006

Area unit 2004

Classification Area Unit 2004
Abbreviation AU04
Version V1.0
Effective date 01/01/2004

Area unit 2001

Classification Area Unit 2001
Abbreviation AU01
Version V1.0
Effective date 01/01/2001
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