Welsh Assembly Constituency Boundaries as of December 2015

Digital vector boundaries for the National Assembly for Wales constituencies as they stood in December 2015. The dataset contains five boundary versions, including full-resolution extents and four levels of generalisation, with file sizes ranging from 34 KB to 4 MB. Office for National Statistics data includes both Ordnance Survey and ONS Intellectual Property Rights.

Use Cases

• Mapping electoral constituency extents based on the provided full-resolution vector boundaries.
• Performing spatial analysis of Welsh political regions using the coastline-clipped boundary versions.
• Creating simplified maps for publication using the generalised (20m, 200m, 500m) boundary layers.
• Integrating with other UK administrative geographies via the provided ArcGIS REST services.

Strengths

• Provides five distinct boundary versions, from full resolution to ultra generalised (500m).
• Includes specific file sizes for each version, with the ultra generalised version being 34 KB.
• Contains boundaries as of a specific date: December 2015.
• Offers multiple access methods, including direct download and ArcGIS REST services.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is from 2015 and may not reflect subsequent boundary reviews or changes.
• Row count is unknown, which may limit suitability assessment for large-scale analysis.

Provenance

Source

Office for National Statistics

Collection Method

Likely digitized from official electoral boundary definitions.

Time Range

December 2015

Freshness

Last updated 2026-07-08 13:32:47.530330; freshness should be verified.

Geography

Wales