Lower Layer Super Output Areas (LSOA): England and Wales Boundaries from 2001

Digital vector boundaries for Lower Layer Super Output Areas (LSOA) in England and Wales as of 31 December 2001. The dataset contains three boundary versions: full resolution (extent of the realm), full resolution clipped to the coastline, and a generalised (20m) version. It is provided by the Office for National Statistics and contains both Ordnance Survey and ONS Intellectual Property Rights.

Use Cases

• Mapping census data based on the 2001 LSOA geography mentioned in the description
• Analyzing coastal vs. inland administrative extents based on the full resolution and clipped boundary options
• Creating generalised maps for publication based on the 20m generalised boundary layer
• Joining socioeconomic statistics to a consistent 2001-era spatial framework

Strengths

• Provides three specific boundary versions: full resolution (extent), full resolution (clipped), and generalised (20m)
• File sizes are specified: 253 MB, 264 MB, and 87 MB for the respective versions
• Includes access via REST URLs for ArcGIS INSPIRE View and Feature Download services

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Data is from a single snapshot date (31 December 2001); temporal coverage is limited
• Row count is unknown, which may limit suitability assessment

Provenance

Source

Office for National Statistics

Time Range

Snapshot as of 31 December 2001

Freshness

Last updated 2026-07-08 13:33:08.671796; freshness should be verified

Geography

England and Wales