OS Open Linked Identifiers

The OS Open Linked Identifiers product provides the relationships between the following features found in OS MasterMap products (Note that Topographic Areas are limited to address and road features):

• TopographicArea* (TOID): OS MasterMap Topographic Layer

• RoadLink(TOID): OS MasterMap Highways Networks – Roads

• Road(TOID): OS MasterMap Highways Networks – Roads

• ORRoadLink/ORRoadNode(GUID): OS Open Roads

• Street(USRN): OS MasterMap Highways Networks – Roads

• BLPU(UPRN): AddressBase Premium

*restricted to address and road features.

• Access: Download

• Data theme: Multiple

• Data structure: Vector – Identifiers

• Coverage: Great Britain

• Scale: 1:1 250 to 1:10 000

• Format: CSV

• Ordering area: All of Great Britain

• OS Data Hub plan: Energy & Infrastructure Plan, OS OpenData Plan (FREE), Premium Plan, Public Sector Plan

Identifier version information

Open Linked Identifiers includes the latest version information for all the respective features that are referred to. In some cases, this might be a different version of the feature than what was used to form the relationship. This means that in some cases the relationship might not still be valid. To help resolve this we’ve also included a confidence value, indicating if the feature has changed since the relationship was formed, which can be used to resolve errors.

Geometry and attribution access

Geometry is not included in OS Open Linked Identifiers. You can get the geometry you need from either OS Open UPRN, OS Open USRN or OS Open TOID.

UDPRN

OS Open Linked Identifiers does not contain UDPRN, as there is third party IP associated with the UDPRN.