retrieving and matching additional boundary data from ukborders
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TRANSCRIPT
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Censu
s.ac.
uk
Mapping data using ArcGIS
Carol Blackwood, UKBORDERS
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Censu
s.ac.
uk
Why map census data?
• Benefits of mapping census data– Reveal spatial patterns– Add richness to research– (More) Effective presentation and
dissemination of results
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Censu
s.ac.
uk
Why map census data?
• Uses of mapped census data– Health– Employment– Education– Population– Ethnicity– Historic– Used in academic research and in
local/central government for policy decision making
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Censu
s.ac.
uk
Census Aggregate Statisticse.g. Population by district of SW England
Map displaying population of SW England
District outlines
DIGITAL BOUNDARY DATA
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Censu
s.ac.
uk
Digital Boundary Data (DBD)
• Digital version of geographical boundary information
• e.g. districts, county, output areas, primary care trust
• UKBORDERS – more later…
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Censu
s.ac.
uk
Mapping in ArcGIS
• Introduction to ArcGIS (demo)• Import data downloaded from CASWEB• Visualise variables• Create a map to print
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Censu
s.ac.
uk
Retrieving and matching additional boundary data from UKBORDERS
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Censu
s.ac.
uk
UKBORDERSedina.ac.uk/ukborders/
– Web based delivery of DBD and associated look-up tables
– Main datasets associated with 1981, 1991 and 2001 Census geography
– Entire datasets and user defined areas– Comprehensive help and support– Key associated datasets e.g. current and
historical NSPD– Learning materials– Metadata
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Censu
s.ac.
uk
Linking Census datasets in GIS
• Visualising Census data using boundaries will usually involve linking datasets
• Three main ways:– Attribute to digital boundary data– Point-in-polygon– Polygon-in-polygon
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Censu
s.ac.
uk
Retrieving and matching additional boundary data
• Download Primary Care Trust areas from UKBORDERS
• Load into ArcMap• Spatially link to Ethnicity data• Visualise Ethnicity stats by PCTs