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The 2011 OAC has been created through collaboration between the Office for National Statistics (ONS) and University College London (UCL). The 2011 OAC is a three-tiered hierarchical geodemographic classification of the UK built using only 2011 UK Census data at the Output Area / Small Area level. It consists of 8 Supergroups, 26 Groups and 76 Subgroups.

A number of 2011 OAC resources are available on the ONS webpage (or the [previous ONS webpage] (http://webarchive.nationalarchives.gov.uk/20160105160709/http://www.ons.gov.uk/ons/guide-method/geography/products/area-classifications/ns-area-classifications/ns-2011-area-classifications/index.html) which has now been archived) and Open Geodemographics.

You can access the journal paper 'Creating the 2011 area classification for output areas (2011 OAC)' for free from [here] (http://josis.org/index.php/josis/article/viewArticle/232).

This webpage is designed to provide additional material and information to aid use of the 2011 OAC. The following resources are available:

Download all resources provided below: [Download as a ZIP File] (http://tiny.cc/OAC-Bulk-Download)

2011 OAC Dataset (including Squared Euclidean distance values) - CSV: [Download ZIP File] (http://tiny.cc/OAC-CSV)

2011 OAC Dataset (including Squared Euclidean distance values) - DBF: [Download ZIP File] (http://tiny.cc/OAC-DBF)

2011 OAC Dataset - Local Authority CSVs: [Download ZIP File] (http://tiny.cc/OAC-LA-CSV)

2011 OAC Dataset - Postcodes: [Download ZIP File] (http://tiny.cc/OAC-Postcodes)

2011 OAC Lookup by Local Authority (or equivalent) and Region/Country: [Download XLSX File] (http://tiny.cc/OAC-Lookup-LA)

2011 OAC Top 10 Forenames: [Download ZIP File] (http://tiny.cc/OAC-Forenames)

2011 OAC: [Download ZIP File] (http://tiny.cc/OAC-Shp)

2011 OAC Cartogram: [Download ZIP File] (http://tiny.cc/OAC-Shp-Carto)

2011 OAC Buildings: [Download ZIP File] (http://tiny.cc/OAC-Shp-Buildings)

2011 OAC Local Authorities (Shapefile per Local Authority): [Download ZIP File] (http://tiny.cc/OAC-Shp-LA)

2011 OAC Regions/Countries (Shapefile per Region or Country): [Download ZIP File] (http://tiny.cc/OAC-Shp-Regions)

2011 OAC in London: [Download ZIP File] (http://tiny.cc/OAC-Shp-London)

2011 OAC in London Buildings: [Download ZIP File] (http://tiny.cc/OAC-Shp-Ldn-Buildings)

Code used to create the 2011 OAC: [Open link] (http://tiny.cc/OAC-Code)

Interactive map: [Open link] (http://tiny.cc/OAC-Interactive-Map)

Map of Supergroups: [Download ZIP File] (http://tiny.cc/OAC-Map-SprGrps)

Map of Supergroups Cartogram**: [Download ZIP File] (http://tiny.cc/OAC-Map-SprGrp-Carto)

Map of Groups: [Download ZIP File] (http://tiny.cc/OAC-Map-Groups)

Map of Subgroups: [Download ZIP File] (http://tiny.cc/OAC-Map-Subgroups)

Map of Supergroups in London: [Download ZIP File] (http://tiny.cc/OAC-Map-SprGrps-Ldn)

Map of Supergroups Assignment Certainty: [Download ZIP File] (http://tiny.cc/OAC-Map-Certainty)

Map of Supergroups Assignment Certainty Cartogram**: [Download ZIP File] (http://tiny.cc/OAC-Map-Certainty-Carto)

Mapping the Supergroup Similarities***: [Download ZIP File] (http://tiny.cc/OAC-Map-SprGrp-Similar)

Map of Supergroup assignments to buildings in the UK****: [Download ZIP File] (http://tiny.cc/OAC-Map-SprGrp-Buildings)

Map of Supergroup assignments to buildings in London****: [Download ZIP File] (http://tiny.cc/OAC-Map-Ldn-Buildings)

**The cartogram representations have had the size and shape of each Output Area and Small Area modified based on the resident population on the 27th March 2011

*** Please note instead of each Output Area or Small Area being assigned to one distinct Supergroup, they are given values representing how similar they are to all eight Supergroups. The lower the number, the higher the similarity that Output Area or Small Area has to the characteristics described in the Pen Portraits.

**** Please note these maps should not be interpreted as having a higher level of precision than a standard choropleth map of Output Areas and Small Areas. The colour of an individual building is derived from the average of the Output Area or Small Area it is located in, and is not a reflection of that particular property itself.

2011 OAC Hierarchical Structure: [Download PDF] (http://tiny.cc/OAC-Structure)

2011 OAC Pen Portraits: [Download ONS PDF] (http://www.ons.gov.uk/ons/guide-method/geography/products/area-classifications/ns-area-classifications/ns-2011-area-classifications/pen-portraits-and-radial-plots/pen-portraits-oa.pdf)

2011 OAC Cluster Profiles - Radial Plots: [Download PDF] (http://tiny.cc/OAC-Radial-Plots)

2011 OAC Cluster Profiles - Bar Plots: [Download PDF] (http://tiny.cc/OAC-Bar-Plots)

2011 OAC Cluster Profiles - Plot Data: [Download ZIP File] (http://tiny.cc/OAC-Plot-Data)

2011 OAC 167 Initial Variables Dataset: [Download ZIP File] (http://tiny.cc/OAC-Var-167)

2011 OAC 60 Final Variables Dataset: [Download ZIP File] (http://tiny.cc/OAC-Var-60)

2011 OAC Variable Descriptions: [Download ZIP File] (http://tiny.cc/OAC-Var-Descriptions)

2011 OAC Variable Names: [Download PDF] (http://tiny.cc/OAC-Var-Names)

2011 UK Output Areas and Small Areas Codes and Total Population lookup: [Download ZIP File] (http://tiny.cc/OA-Pop-Lookup)

2011 OAC Variable Correlation: [Download ZIP File] (http://tiny.cc/OAC-Var-Correlation)

2011 OAC Cluster Evaluation (Lorenz Curves, Gini Coefficients and Distribution Plots): [Download ZIP File] (http://tiny.cc/OAC-Evaluation)

2011 OAC Colour Scheme: [Download ZIP File] (http://tiny.cc/OAC-Colours)

2011 OAC ArcGIS Style: [Download ZIP File] (http://tiny.cc/OAC-Style)

2011 OAC Logo: [Download ZIP File] (http://tiny.cc/OAC-Logo)

2011 OAC to Workplace Zones Flows Dataset: [Download ZIP File] (http://tiny.cc/OAC-WZ-Flows)

2011 OAC to Workplace Zones Flow Maps: [Download ZIP File] (http://tiny.cc/OAC-WZ-Flows-Maps)

2011 OAC Supergroup Populations to Workplace Zones Flow Maps: [Download ZIP File] (http://tiny.cc/OAC-WZ-Pop-Flows-Maps)