Welsh Assembly Electoral Regions, Ultra Generalised Boundaries from 2015

Ultra generalised 500m resolution vector boundaries for the National Assembly for Wales electoral regions, clipped to the coastline. This dataset contains five resolution variants, from full resolution (2-3 MB) to ultra generalised (23 KB), published by the Office for National Statistics. The boundaries reflect the electoral geography as of December 2015.

Use Cases

• Create regional-scale electoral maps based on the ultra generalised 500m boundaries.
• Perform spatial joins with demographic data using the provided electoral region polygons.
• Analyze the coastline clipping methodology by comparing the full extent and clipped boundary files.

Strengths

• Provides five distinct resolution options, with file sizes ranging from 23 KB to 3 MB.
• Contains intellectual property from both Ordnance Survey and the Office for National Statistics.
• Offers multiple download formats (GEOJSON, CSV, KML, ZIP) and REST API access.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Office for National Statistics

Collection Method

Digital vector boundaries derived from Ordnance Survey data.

Time Range

December 2015

Freshness

Last updated 2026-07-08 13:33:18.837877; freshness should be verified.

Geography

Wales