Welsh National Assembly Constituency Boundaries, December 2016

Digital vector boundaries for the National Assembly for Wales constituencies as they stood on 31 December 2016. The dataset contains four boundary variants, including full-resolution and generalised versions, with file sizes ranging from 87 KB to 5 MB. It is provided by the Office for National Statistics under an OGL-UK-3.0 license.

Use Cases

• Mapping constituency boundaries based on the provided full-resolution and generalised vector files.
• Analyzing electoral district extents based on the Mean High Water and Mean Low Water coastline definitions.
• Integrating administrative boundaries for Wales into larger geospatial analyses based on the ArcGIS service endpoints.

Strengths

• Provides four distinct boundary versions, including full-resolution and 20m/200m generalised options.
• Specific file sizes are listed for each variant, ranging from 87 KB to 5 MB.
• Boundaries are explicitly dated to 31 December 2016, providing a clear temporal snapshot.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and total dataset size are unknown, which may limit suitability assessment.
• Freshness should be verified as the last platform update was 2026-07-08.

Provenance

Source

Office for National Statistics

Collection Method

Official digital vector boundaries from Ordnance Survey and ONS.

Time Range

As of 31 December 2016

Freshness

Data reflects boundaries as of 31 December 2016.

Geography

Wales