National Assembly for Wales Constituency Boundaries as of December 2016

Wales electoral boundaries for National Assembly constituencies, as at 31 December 2016. The dataset contains digital vector boundaries in four resolutions, from full to super generalised, and is provided by the Office for National Statistics. It was last updated on the platform in July 2026.

Use Cases

• Mapping constituency boundaries for visual analysis based on the provided vector data.
• Performing spatial joins with demographic data based on the super generalised (200m) boundaries for efficiency.
• Creating electoral maps clipped to the coastline (Mean High Water mark) for publication.
• Integrating boundary data into GIS systems via the provided ArcGIS REST services.

Strengths

• Provides four specific boundary resolutions, including file sizes (e.g., super generalised is 87 KB).
• Contains a specific snapshot date (31 December 2016) for temporal consistency.
• Includes direct URLs to ArcGIS REST services for programmatic access.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is from 2016; boundary changes after this date are not reflected.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Office for National Statistics

Collection Method

Digital vector boundaries derived from Ordnance Survey and ONS data.

Time Range

Snapshot as of 31 December 2016.

Freshness

Last updated 2026-07-08 13:31:54.721830; freshness should be verified.

Geography

Wales