A TOID (Topographic Identifier) is a unique and persistent identifier for each and every feature found in OS MasterMap products. This dataset shows unique identifiers for a wide range of landscape and built environment features, with a generalised location, extracted from OS MasterMap products.
This product is updated every six weeks
TOIDs 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 will enable data to be shared for a wide range of landscape and built environment features by providing them with a unique identity and generalised location that can be used by everyone. Watch our OS Open TOID introduction video.
All Topographic points, lines and polygons present in OS MasterMap Topography Layer and junctions, roads and path present in OS MasterMap Highways Networks are also part of this product – so you can be sure you’re not missing out.
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 re-used, once its allocated to a feature, that’s it, it will never change or be reused.
Technical information
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