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Censu
s.ac.
uk
Census Area Statistics and Casweb
David RawnsleyCensus Dissemination Unit
(CDU) MimasUniversity of Manchester
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Overview
• UK Censuses• Aggregate Statistics• Census Geography• Casweb
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UK Census Background
• Comprehensive population surveys• Every ten years• Standard topics• Single points in time• Expensive and complex• Inform policy decisions• 200 year history from 1801 to 2001
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The UK 2001 Census
• UK Census bicentennial• Data collection• Census outputs• Aggregate statistics outputs• Census geographies
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Data Collection
• 29th April, 2001• Enumeration • Confidentiality• Social and economic data• Individual and household levels• Geographical markers• Census questionnaire form
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2001 Census Outputs
• Aggregate Statistics• Samples of Anonymised Records (SARs)• Interaction Statistics• Longitudinal Surveys• Digital Boundary Data• Metadata
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Aggregate Statistics
• Spatially aggregated counts of individuals and households with various combinations of demographic and socio-economic characteristics– For topics see
http://www.statistics.gov.uk/census2001/topics.asp– Nesting geographical hierarchies down to Output Area– Unique zone codes– Some national differences in information and
geographies• Selective release of variables
– Confidentiality key to understanding data structures– Pre-defined cross-tabulations– Several component datasets
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Spatial Aggregation
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Spatial Aggregation
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Univariate/Multivariate
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2001 Census GeographiesGovernment Office Regions (GORs)
Source: 2001 Census. © Crown Copyright.
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2001 Census GeographiesGovernment Office Regions (GORs)
Source: 2001 Census. © Crown Copyright.
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2001 Census GeographiesCounties and Unitary Authorities
Source: 2001 Census. © Crown Copyright.
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2001 Census GeographiesCounties and Unitary Authorities
Source: 2001 Census. © Crown Copyright.
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2001 Census GeographiesLocal Authority Districts
Source: 2001 Census. © Crown Copyright.
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2001 Census GeographiesLocal Authority Districts
Source: 2001 Census. © Crown Copyright.
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2001 Census GeographiesWards
Source: 2001 Census. © Crown Copyright.
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2001 Census GeographiesWards
Source: 2001 Census. © Crown Copyright.
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2001 Census GeographiesWards
Source: 2001 Census. © Crown Copyright.
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2001 Census GeographiesOutput Areas
Source: 2001 Census. © Crown Copyright.
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2001 Census GeographiesOutput Areas
Source: 2001 Census. © Crown Copyright.
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2001 CensusNational Geographical Hierarchies
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2001 Census Geographies
Example Code
England & Wales England Wales
Min Residents
Min Househ
olds Status
Government Office Region (GOR)
D 9 9 Administrative
County 36 42 42 Administrative
Unitary Authority (UA) 00FB 68 46 22 Administrative
Local Authority District (LAD) 36UD 308 308 Administrative
ST Ward 36UDGN 8,800 7,932 868 1,000 400 Administrative/Census
CAS Ward 36UDGN 8,850 7,969 881 100 40 Administrative/Census
Output Area 36UDGN0006 175,434 165,665 9,769 100 40 Census
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Casweb
• Census Area Statistics on the Web• http://casweb.mimas.ac.uk• Online access to aggregate statistics• Developed at CDU• Features
– Intuitive web interface– Data driven– Designed for Academics
