retrieving and matching additional boundary data from ukborders
DESCRIPTION
TRANSCRIPT
Censu
s.ac.
uk
Mapping data using ArcGIS
Carol Blackwood, UKBORDERS
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
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
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
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…
Censu
s.ac.
uk
Mapping in ArcGIS
• Introduction to ArcGIS (demo)• Import data downloaded from CASWEB• Visualise variables• Create a map to print
Censu
s.ac.
uk
Retrieving and matching additional boundary data from UKBORDERS
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
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
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