Understanding and accessing 2011 census aggregate data

Transcription

1 Understanding and accessing 2011 census aggregate data 4 July 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.

2 Welcome Justin Hayes UK Data Service The University of Manchester Richard Wiseman UK Data Service The University of Manchester

3 Workshop structure

4 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

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6 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 ( ) Bespoke interfaces to make data easy to find, understand and use census.ukdataservice.ac.uk

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8 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

9 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

10 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

11 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

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14 Example aggregate data Age : 16 to 24 years old - Religion (England and Wales) : Muslim - Unit : People

15 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

16 2011 Census geographies

17 UK administrative geography relationships

18 UK statistical geography relationships

19 Geography characteristics zone_count mean population stdev/mean United Kingdom 1 63,182,200 - Countries 4 15,795, Regions 9 5,890, Counties 35 1,168, Unitary Authorities , Districts , MSOA , Wards , LSOA , Output Area

20 Geography zone codes GSS codes (Government Statistical Service) Uniquely identify zones 9 characters E First character - country Second and third digits geography entity Final six digits geography zone instance

21 Top ward names

22 Other Geographies Parishes Electoral Health areas Postcodes and Postcode sectors Urban areas and settlements Workplace zones National parks

23 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)

24 2011 Census Aggregate Outputs

25 Lower detail for all geographies zone_count mean population stdev/mean United Kingdom 1 63,182,200 - Countries 4 15,795, Regions 9 5,890, Counties 35 1,168, Unitary Authorities , Districts , MSOA , Wards , LSOA , Output Area

26 Higher detail down to wards zone_count mean population stdev/mean United Kingdom 1 63,182,200 - Countries 4 15,795, Regions 9 5,890, Counties 35 1,168, Unitary Authorities , Districts , MSOA , Wards , LSOA , Output Area

27 Release Timeline Jul-Aug 2012 Oct-Nov 2012 Dec 2012 Jan Feb Mar Apr May Jun Jul Aug Sep Oct From Winter /14

28 Release Timeline Jul-Aug 2012 Oct-Nov 2012 Dec 2012 Jan Feb Mar Apr May Jun Jul Aug Sep Oct From Winter /14

29 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!

30 Access to InFuse 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

31 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

32 census.ukdataservice.ac.uk

33 InFuse Support infuse.mimas.ac.uk census.ukdataservice.ac.uk

34 Digital boundaries and mapping

35 Digital boundary data

36 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