OS Open TOID
Here you will find all documentation for the OS Open TOID product.
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.
Authoritative identifiers for real-world objects
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.
Easy to share
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.
Complete topographic data
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.
Authoritative source
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.
Identifiers you can trust
The TOID is never reused as once it's allocated to a feature, that’s it; it will never change or be reused.
OS Open TOID offers a range of opportunities to link and share disparate datasets against a unique identifier, with a location.
For example, a local authority may use OS Open TOID to link unaddressed buildings captured within OS MasterMap Topography Layer with information such as ownership or planning permission to build a richer picture of land and property in their remit.
OS Open TOID is a dataset that is designed to use the OS MasterMap product family as a basis with which you can create your own rich, comprehensive dataset that caters to your specific needs. It is not designed to be used as a geospatial selector for features.
Access: Download
Data theme: Multiple
Data structure: Vector – Identifiers
Coverage: Great Britain
Scale: 1:1 250 to 1:10 000
Format: GeoPackage, CSV
Ordering area: Customisable area (100km² tiles)
TOID features
The register for TOIDs is not exhaustive. Not all TOID features are included in the product as some feature types are not useful for third-party data references; however, all TOIDs are provided for every feature type we have included in the product.
TOID geometry
TOID geometry always lies within the polygon. We are using a pole of inaccessibility algorithm to selection a generalised point location for polygon which can be used to position a label for that feature. The aim is to provide a point which is most suitable for labelling the polygon. In the situation where we have a multi-polygon feature (only found in our OS MasterMap Sites Layer product), the point is placed in the largest polygon.
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:
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