OS Open Linked Identifiers

Here you will find all documentation for the OS Open Linked Identifiers product.

OS Open Linked Identifiers | Data Products | OSOrdnance Survey

An open dataset of cross-referenced identifiers between various OS data products.

This product is updated every six weeks.

Example of OS Open Linked Identifiers data displayed against a background map

OS Open Linked Identifiers provides authoritative relationship between Unique Property Reference Numbers (UPRNs), Unique Street Reference Numbers (USRNs), Topographic Object Identifiers (TOIDs) and metadata to enable reliable matching and for greater data connectivity.

OS Open Linked Identifiers is part of the OS Open Identifiers 'Family' of products, which includes four OpenData products: OS Open Linked Identifiers, OS Open TOID, OS Open UPRN and OS Open USRN. The products within this family allow you to easily share information held against a range of identifiers and to link together information associated with these identifiers.

Benefits

Relationships between UPRNs, USRNs and TOIDs

OS Open Linked Identifiers is a dataset containing the authoritative relationships between UPRNs, USRNs and TOIDs.

Better visualisation

Connecting addresses with road features enables more related data to be joined together which simplifies a number of valuable workflows. Linking these features to graphical elements of OS MasterMap products enables better visualisation of the data related to them.

Find all addresses on a road

Link data related to an address with its building footprint. Validate an address's UPRN with the name of the road that accesses it. Validate a street's USRN with the name of the road it relates to.

Authoritative source

The relationships UPRN and USRN are provided by the bodies responsible for the identifier schemes, and these are spatially matched to OS MasterMap features by Ordnance Survey. This means you can have confidence that you're accessing an authoritative source of these relationships.

Relationships you can trust

The relationships are taken from our Premium Download data products and made open so that everyone can access them from one trusted source.

OS Open Linked Identifiers 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.

Summary

Additional Information

How to get this product

Access to this OS OpenData product is free through the OS Data Hub.

What's next?

To access additional documentation and resources relating to this product, please refer to the following:

OS Open Identifiers Family Information

This page gives context and information about the OS Open Identifiers 'Family' of products, including explaining what identifiers are and introducing the OS identifiers (TOID, UPRN and USRN).

Overview

The overview introduces OS Open Linked Identifiers and gives context for all users – highlighting key features, giving examples of potential uses, and listing details on file sizes, supply formats, etc.

Getting Started Guide

The getting started guide provides instructions for using OS Open Linked Identifiers in different software applications. Users with limited technical knowledge will be able to follow this guide.

Technical Specification

The technical specification provides detailed technical information about OS Open Linked Identifiers. It is targeted at technical users and software developers.

New users should start with the Overview to gain high-level insights into the product. The Getting Started Guide will help you to begin using product data in different software systems. The Technical Specification contains detailed technical insights.

We recommend referring to the OS Open Identifiers Family Information page in combination with the Overview and Technical Specification documents for OS Open Linked Identifiers.