Lower Layer Super Output Areas: England and Wales Administrative Boundaries, 2001

Digital vector boundaries for Lower Layer Super Output Areas (LSOAs) 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 clipped to the coastline. 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
• Conducting spatial analysis of social indicators based on the provided administrative boundaries
• Creating base maps for regional planning based on the full-resolution or generalised coastline-clipped boundaries

Strengths

• Provides three specific boundary versions: full resolution (extent of the realm), full resolution (clipped), and generalised (20m) clipped
• Includes specific file sizes: 253 MB for full resolution extent, 264 MB for full resolution clipped, and 87 MB for generalised clipped
• Contains boundaries for a specific historical snapshot (31 December 2001)

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Data may reflect temporal bias inherent to the 2001 geography, which may not align with current boundaries

Provenance

Source

Office for National Statistics

Collection Method

Likely digitized and maintained by national mapping and statistical agencies.

Time Range

As of 31 December 2001

Freshness

Last updated 2026-07-08 13:32:55.547170; freshness should be verified

Geography

England and Wales