Lower Layer Super Output Areas: 2011 Census Boundaries for England and Wales

Office for National Statistics provides digital vector boundaries for Lower Layer Super Output Areas (LSOAs) as of 31 December 2011. The dataset contains four boundary versions: full resolution (extent of the realm and clipped to coastline), generalised (20m), and super generalised (200m). File sizes range from 8 MB for the super generalised version to 357 MB for the full resolution extent.

Use Cases

• Create census data visualizations based on the provided super generalised (200m) boundaries.
• Perform spatial joins for demographic analysis using the full resolution boundaries clipped to the coastline.
• Develop regional policy or service allocation models based on the Lower Layer Super Output Area geography.
• Integrate boundary data into GIS systems for England and Wales using the available GeoJSON, KML, or ArcGIS service URLs.

Strengths

• Provides four distinct boundary resolutions, with file sizes explicitly listed (e.g., 8 MB for super generalised).
• Contains boundaries for a specific, documented snapshot date (31 December 2011).
• Offers multiple access methods, including direct file downloads (GeoJSON, CSV, KML, ZIP) and ArcGIS REST services.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is specific to 2011, which may limit contemporary analysis without updates.
• Row count and specific attribute columns are unknown, which may limit suitability assessment.

Provenance

Source

Office for National Statistics

Collection Method

Digital vector boundaries produced for census geography.

Time Range

As at 31 December 2011

Freshness

Last updated 2026-07-08 13:32:12.171194; freshness should be verified.

Geography

England and Wales