Welsh National Assembly Constituency Boundaries as of December 2016

Four vector boundary resolutions for National Assembly for Wales constituencies, including full, generalised, and super-generalised versions clipped to the coastline. The data is provided by the Office for National Statistics and contains Ordnance Survey and ONS intellectual property rights. File sizes range from 87 KB for the super-generalised version to 5 MB for the full-resolution clipped version.

Use Cases

• Create electoral maps for Wales based on the provided vector boundaries.
• Analyze constituency shapes and sizes using the different generalisation levels (20m, 200m).
• Integrate boundary data with demographic or election results for spatial analysis.
• Serve boundary data via web mapping services using the provided ArcGIS REST URLs.

Strengths

• Provides four distinct boundary resolutions, from full detail (4-5 MB) to highly generalised (87 KB).
• Contains specific download file sizes for each version, aiding in resource planning.
• Includes direct REST service URLs for programmatic access and integration.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is specific to a single snapshot date (31 December 2016), limiting temporal analysis.

Provenance

Source

Office for National Statistics

Collection Method

Digital vector boundaries from Ordnance Survey and ONS sources.

Time Range

As at 31 December 2016.

Freshness

Last updated 2026-07-08 13:32:18.667569; freshness should be verified.

Geography

Wales