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Understanding and accessing 2011
census aggregate data
4 July 2013
11:00 to 16:00 BST
Justin Hayes and Richard Wiseman
UK Data Service Census Support
UK censuses provide an unparalleled resource of high quality information about a wide range of current and historical demographic and socio-economic characteristics of the population across the UK. This free, one-day workshop will provide an introduction to the aggregate data outputs from the 2011 UK Census and an opportunity to explore the InFuse interface designed to simplify access to and understanding of these data in hands on sessions. The workshop will be of interest to existing and potential academic users of census outputs.
Welcome
Justin Hayes
UK Data Service
The University of Manchester
Richard Wiseman
UK Data Service
The University of Manchester
Workshop structure
The UK Data Service
• A new service funded by the
ESRC, integrating several
previous resources
• A single, comprehensive and
integrated point of access to a
wide range of social science data
• Support, training and guidance
• ukdataservice.ac.uk
UK Data Service Census Support
• A specialist unit of the UK Data Service
• Access to, and support for use of data from the last five
UK censuses (1971 – 2011)
• Bespoke interfaces to make data easy to find,
understand and use
• census.ukdataservice.ac.uk
UK Censuses
• Huge questionnaire surveys of the entire UK population
• Primary evidence for government policy and spending
• Rich source of secondary socio-economic information
• Wide range of variables
• Small geographical scales
• High quality and consistency
• Long history
• Individual-level, aggregate, flow and boundary data
outputs
UK 2011 Census
• 27 March 2011
• UK census agencies (ONS, NRS, NISRA)
• New questions and variables
• Online and postal completion
• Targeted enumeration
• Sophisticated quality assurance
New questions • National identity
• Passports held
• Ability in spoken
English
• Languages other than
English used at home
• Long term health
conditions (detailed for
Scotland/Northern
Ireland)
• Month/year of arrival
into the UK (for people
not born in the UK)
• Intention to stay
• Second homes
Aggregate data
• Counts of people or households,
etc. with particular combinations of
characteristics within sets of geographical zones
varying from large to small
• Number of female full-time students resident in the
County of Devon?
• = 20,434
17 59
22
24
37
Example aggregate data
Age : 16 to 24 years old - Religion (England and Wales) :
Muslim - Unit : People
2011 Census geographies
• Subdivisions of the area of the UK into ‘zones’
• Layers of similar zones called ‘geographies’ (eg
Counties)
• Nesting geography hierarchies
• Administrative
• Statistical
• Small areas consistent with 2001
• Different structures across UK
2011 Census geographies
UK administrative geography relationships
UK statistical geography relationships
Geography characteristics
zone_count mean population stdev/mean
United Kingdom 1 63,182,200 -
Countries 4 15,795,544 1.36
Regions 9 5,890,273 0.30
Counties 35 1,168,561 0.80
Unitary Authorities 78 194,568 0.52
Districts 270 151,480 0.72
MSOA 7201 7,787 0.21
Wards 8570 6,543 0.69
LSOA 34753 1,614 0.19
Output Area 181408 309 0.27
Geography zone codes
• GSS codes (Government Statistical Service)
• Uniquely identify zones
• 9 characters
• E05000036
• First character - country
• Second and third digits – geography entity
• Final six digits – geography zone instance
Top ward names
Other Geographies
• Parishes
• Electoral
• Health areas
• Postcodes and Postcode sectors
• Urban areas and settlements
• Workplace zones
• National parks
2011 Census aggregate outputs
• Lengthy consultation process
• Confidentiality
• 100 year rule
• Statistical disclosure control (SDC) measures
• Trade-off of information detail vs geographical detail
• Lower information detail for smallest zones
• Higher information detail for larger zones
• Examples
• Single years of age at MSOA
• Five year groups at OA
• Open data!
• Open Government Licence (OGL)
2011 Census Aggregate Outputs
Lower detail for all geographies
zone_count mean population stdev/mean
United Kingdom 1 63,182,200 -
Countries 4 15,795,544 1.36
Regions 9 5,890,273 0.30
Counties 35 1,168,561 0.80
Unitary Authorities 78 194,568 0.52
Districts 270 151,480 0.72
MSOA 7201 7,787 0.21
Wards 8570 6,543 0.69
LSOA 34753 1,614 0.19
Output Area 181408 309 0.27
Higher detail down to wards
zone_count mean population stdev/mean
United Kingdom 1 63,182,200 -
Countries 4 15,795,544 1.36
Regions 9 5,890,273 0.30
Counties 35 1,168,561 0.80
Unitary Authorities 78 194,568 0.52
Districts 270 151,480 0.72
MSOA 7201 7,787 0.21
Wards 8570 6,543 0.69
LSOA 34753 1,614 0.19
Output Area 181408 309 0.27
Release Timeline
Jul-Aug 2012
Oct-Nov 2012
Dec 2012
Jan 2013
Feb 2013
Mar 2013
Apr 2013
May 2013
Jun 2013
Jul 2013
Aug 2013
Sep 2013
Oct 2013
From Winter 2013/14
Release Timeline
Jul-Aug 2012
Oct-Nov 2012
Dec 2012
Jan 2013
Feb 2013
Mar 2013
Apr 2013
May 2013
Jun 2013
Jul 2013
Aug 2013
Sep 2013
Oct 2013
From Winter 2013/14
InFuse
• Make census data easier to:
• Find
• Understand
• Use
• Improvements in
• Search across entire census datasets
• Availability of meaning via metadata
• Consistency of categories and labels
• Built on comprehensive reprocessing and integration of
data and metadata
• NO TABLES! - cross-search by topic
• No data – fast!
Access to InFuse 2011
• 2011 Census version of InFuse recently launched
• Public access with registration and login
• All data is open via Open Government Licence
• UK academics using their usual username and password
• Others using a UK Data Archive account
What’s next?
• Progressive release of UK 2011 outputs
• Previous censuses (currently in Casweb)
• Search and comparability across censuses
• Improvements to interface design and features
• Access to underlying API for application development
• Engagement with NSIs
• Better data from producers
• Possible access without login
census.ukdataservice.ac.uk
InFuse Support
infuse.mimas.ac.uk
census.ukdataservice.ac.uk
Digital boundaries and mapping
Digital boundary data
Geographical Information Systems (GIS)
• Sophisticated database applications
• Store spatial entities and relationships
• Join attribute data to spatial entities (what to where)
• Perform spatial operations
• Visualisations
• Spatial analysis
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