Output Area Classification

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Keywords: London Profiler OAC Output Area Classification

Brief Description

Output Area Classification

Detailed Information

The Output Area Classification (OAC)

The Output Area Classification (OAC) distils key results from the 2001 Census as a multidimensional geodemographic classification. For each Output Area it presents a descriptive typology representing the average characteristics of people living within these areas. The classification was developed by Dan Vickers while at the University of Leeds and in collaboration with the ONS. The classification is supported by an active user group. For more information on OAC and Geodemographicsa in general see the "Getting Started" section of the OAC User Group website.

How was OAC created?

The Output Area Classification was created by calculating a series of rates for 41 variables extracted from the 2001 Census at Output Area (OA) level. The log of these variables was then taken, and these data further range standardised. Three levels were selected for the final classification and a k-means cluster analysis was used to aggregate the data at Output Areas into 7 Supergroups. The OAswithin these 7 Supergroupswere then divided to create 21 Groups. The 21 Groups were then divided again to create 52 Subgroups.