Combined Authorities Boundaries for England (Generalised 20m)

Digital vector boundaries for Combined Authorities in England, as at December 2025 and December 2023. The data provides generalised (20m) boundaries clipped to the coastline (Mean High Water mark) and contains both Ordnance Survey and Office for National Statistics intellectual property rights. It is available via multiple web service endpoints including Feature Access Service and WFS Server.

Use Cases

• Mapping regional governance structures based on official Combined Authority boundaries.
• Spatial analysis of policy impacts using the generalised (20m) coastline-clipped geometry.
• Integrating administrative data using the official December 2025 and December 2023 boundary snapshots.

Strengths

• Contains official boundaries from Ordnance Survey and ONS, indicating authoritative sourcing.
• Available via multiple standard geospatial web services (Feature Access Service, WFS Server), enhancing accessibility.
• Provides boundaries for two specific time points (December 2023 and December 2025), allowing for temporal analysis.

Limitations

• Key metadata such as row count, file size, specific license terms, and detailed column schema are unknown across all sources.
• The dataset's presence on multiple platforms with identical descriptions but different 'last updated' timestamps (2024-03-12 and 2026-04-29) creates ambiguity about the definitive version.

Provenance

Source

Government Digital Service (UK), Ordnance Survey, Office for National Statistics

Collection Method

Official digital vector boundary production.

Time Range

Snapshots as at December 2023 and December 2025.

Freshness

Last updated dates range from 2024-03-12 to 2026-04-29, with boundaries referenced as at December 2025.

Geography

England