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An introduction to 2011 Census geography James Crone Webinar 17 May 2013

An Introduction to 2011 Census Geography

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Page 1: An Introduction to 2011 Census Geography

An introduction to 2011 Census geography

James Crone

Webinar

17 May 2013

Page 2: An Introduction to 2011 Census Geography

Welcome

An introduction…

James CroneUK Data Service

EDINA GeoServicesUniversity of Edinburgh

Page 3: An Introduction to 2011 Census Geography

This webinar is one in a series to launch the UK Data Service:

An introduction to data available from the UK Data Service

MONDAY 13 May 2013

Broadening access: Improving the impact of social data

TUESDAY 14 May 2013

Looking after and managing your research data

WEDNESDAY 15 May 2013

UnDISCOVERed riches: Finding and accessing data via the UK Data Service

THURSDAY 16 May 2013

An introduction to 2011 census geography

FRIDAY 17 May 2013

Welcome

Page 4: An Introduction to 2011 Census Geography

What is the UK Data Service?

• a comprehensive resource funded by the ESRC

• a single point of access to a wide range of secondary social science data

• support, training and guidance

Page 5: An Introduction to 2011 Census Geography

Who is it for?

• academic researchers and students

• government analysts

• charities and foundations

• business consultants

• independent research centres

• think tanks

ukdataservice.ac.uk

Page 6: An Introduction to 2011 Census Geography

What is Census Support?

• access to, and user support for, data from the last five UK population censuses (1971 – 2011)

• download of data through Census Support is currently restricted to UK Academic users

census.ukdataservice.ac.uk

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Poll

Have you used census data before?

• No

• Yes, for the UK

• Yes, for outside the UK

Page 8: An Introduction to 2011 Census Geography

The 2011 Census and census geography

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What is a census?

“The total process of collecting, compiling, evaluating, analysing and publishing demographic, economic and social data pertaining at a specified time, to all persons in a country or well delimited parts of the country”

United Nations (1998)

Page 10: An Introduction to 2011 Census Geography

The census in the UK

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 11: An Introduction to 2011 Census Geography

Household census questions

• accommodation type – house or flat?

• own or rent?

• how many rooms?

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Individual census questions

• male or female?

• age?

• country of birth?

• health?

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What sort of output data is produced?

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Output census data is geographic

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Geographical visualisation / analysis

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 16: An Introduction to 2011 Census Geography

Census Output Areas

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 17: An Introduction to 2011 Census Geography

Making 2011 output areas

• use where possible 2001 output areas

• built from aggregations of postcodes

• have roughly similar-sized populations

• group together socially similar households

• align with local authority boundaries

• align to road centrelines and railways

Page 18: An Introduction to 2011 Census Geography

2011 Census geography hierarchy

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 19: An Introduction to 2011 Census Geography

Different geographic scales

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 20: An Introduction to 2011 Census Geography

Poll

Which years have you used UK census data for?

• 1971

• 1981

• 1991

• 2001

• 2011

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5 key differences in 2011 Census geography

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Difference #1: output area change

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97.4% 2.6%

How much output area change?

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What kind of output area change (in Leeds)?

Map created by Alex Singleton

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 25: An Introduction to 2011 Census Geography

Difference # 2 : open data

You are free to:

• Copy, publish, distribute and transmit the Information

• Adapt the Information

• Exploit the Information commercially

You must, where you do any of the above:

• Acknowledge the source of the information

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 26: An Introduction to 2011 Census Geography

Difference #3: workplaces

• Introduction of a Workplace Zones Geography in 2011

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Workplace zones vs. output areas

Contains National Statistics data © Crown Copyright and database right 2012

Contains Ordnance Survey data ©Crown Copyright and database right 2012

Page 28: An Introduction to 2011 Census Geography

Difference # 4: identifiers

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Entities + Instances = standard identifers

E00126679 E07000118

Page 30: An Introduction to 2011 Census Geography

Difference # 5: boundary versions

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Extent of the Realm boundaries

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 32: An Introduction to 2011 Census Geography

Clipped boundaries

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 33: An Introduction to 2011 Census Geography

Clipped = more familiar maps

EOR ClippedContains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 34: An Introduction to 2011 Census Geography

Generalised boundaries

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 35: An Introduction to 2011 Census Geography

Generalised = reduced file size

Ungeneralised Generalised

125 MB450 MB

Contains National Statistics data © Crown Copyright and database right 2012Contains Ordnance Survey data © Crown Copyright and database right 2012

Page 36: An Introduction to 2011 Census Geography

2011 Census data in UK Data Service Census Support

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UK Data Service Census Support

Page 38: An Introduction to 2011 Census Geography

Poll

Which Census Support applications have you used before?

• InFuse / Casweb

• Easy Download / Boundary Data Selector

• GeoConvert

• Postcode Directory Download

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Census Support InFuse

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Census Support Boundary Data Selector

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Census Support Thematic Mapper

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More information

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Census2011Geog Project

census2011geog.census.ac.uk

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Census Support Help

ukdataservice.ac.uk/help

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Forthcoming Census Support training

http://goo.gl/RpYNA

Page 46: An Introduction to 2011 Census Geography