OS Open TOID
Last updated
Last updated
This open dataset shows unique identifiers for a wide range of landscape and built environment features with a generalised location extracted from OS MasterMap products. A TOID (Topographic Identifier) is a unique and persistent identifier for each and every feature found in OS MasterMap products.
This product is updated every six weeks.
TOIDs (Topographic Identifiers) are the authoritative identifier assigned to and uniquely identifying real-world objects, being essential for customers to link their own data to and track change over time.
OS Open TOID enables data to be shared for a wide range of landscape and built environment features by providing these features with a unique identity and generalised location that can be used by everyone.
All of the topographic points, lines and polygons present in the OS MasterMap Topography Layer and OS MasterMap Sites Layer products and all of the junctions, roads and paths present in the OS MasterMap Highways Networks products are also part of OS Open TOID.
The TOIDs in OS Open TOID are allocated by Ordnance Survey. This means you can have confidence you’re accessing an authoritative source of these identifiers.
The TOID is never reused as once it's allocated to a feature, that’s it; it will never change or be reused.
Access to this product is free through the OS Data Hub.
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). We recommend referring to this page in combination with the Overview and Technical Specification documents for OS Open TOID.
OS Open TOID 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.