OS Linked Identifiers API provides relationships between UK geospatial identifiers from Ordnance Survey. The API links Unique Property Reference Numbers (UPRNs), Unique Street Reference Numbers (USRNs), and OS MasterMap Topographic Identifiers (TOIDs). This service is offered by the Government Digital Service via the eu_open_data platform.
Use Cases
- Enrich property datasets with street information based on the UPRN-USRN relationship.
- Link address-based records to high-resolution map features based on the TOID relationships.
- Harmonize datasets that use different OS identifier schemes based on the cross-reference capability.
- Perform spatial joins between property and infrastructure data based on the linked identifier network.
Strengths
- Provides authoritative relationships from Ordnance Survey, the UK's national mapping agency.
- Enables linking between three distinct identifier systems (UPRN, USRN, TOID).
- The API is described as being available for free.
Limitations
- Row count, column definitions, and sample data are unknown, limiting suitability assessment.
- Last update date is unknown; freshness unverified.
- Documentation is limited to a high-level description; field semantics and API specifics require further inspection.
Provenance
- Source
- Ordnance Survey (OS), provided via Government Digital Service.
- Collection Method
- Likely derived from OS Premium products and national geospatial databases.
- Time Range
- null
- Freshness
- null
- Geography
- United Kingdom (implied from Ordnance Survey's remit).