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Mapping data using ArcGIS. Carol Blackwood, UKBORDERS. Why map census data?. Benefits of mapping census data Reveal spatial patterns Add richness to research (More) Effective presentation and dissemination of results. Why map census data?. Uses of mapped census data Health Employment
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Mapping data using ArcGIS Carol Blackwood, UKBORDERS
Why map census data? • Benefits of mapping census data • Reveal spatial patterns • Add richness to research • (More) Effective presentation and dissemination of results
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
District outlines Census Aggregate Statistics e.g. Population by district of SW England ? DIGITAL BOUNDARY DATA = Map displaying population of SW England
Digital Boundary Data (DBD) • Digital version of geographical boundary information • e.g. districts, county, output areas, primary care trust • UKBORDERS – more later…
Mapping in ArcGIS • Introduction to ArcGIS (demo) • Import data downloaded from CASWEB • Visualise variables • Create a map to print
Retrieving and matching additional boundary data from UKBORDERS
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
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
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