OS Open TOID | Data Products | OSOrdnance SurveyLoading...
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This release note provides information about the November 2024 release of OS Open TOID (Epoch 39).
Feature counts for this release are provided in the following table:
| Product | Source product | CSV | GeoPackage |
|---|---|---|---|
There are no missing features and no duplicated TOIDs in this release. No significant errors have been identified.
The next release of OS Open TOID (Epoch 40), is scheduled for 06 January 2025.
OS MasterMap Sites Layer
48 624
48 624
48 624
OS MasterMap Highways Network
20 670 854
20 670 854
20 670 854
OS MasterMap Topography Layer
48 113 242
48 113 242
48 113 242
Total
504 832 720
504 832 720
504 832 720
Release notes for the OS Open TOID product.
This release note provides information about the November 2024 (Epoch 39) release of OS Open TOID.
This release note provides information about the September 2024 (Epoch 38) release of OS Open TOID.
This release note provides information about the August 2024 (Epoch 37) release of OS Open TOID.
This release note provides information about the July 2024 (Epoch 36) release of OS Open TOID.
This release note provides information about the September 2024 release of OS Open TOID (Epoch 38).
Feature counts for this release are provided in the following table:
| Product | Source Product | CSV | GeoPackage |
|---|---|---|---|
There are no missing features and no duplicated TOIDs in this release. No significant errors have been identified.
The next release of OS Open TOID (Epoch 39), is scheduled for 15 November 2024.
This release note provides information about the July 2024 release of OS Open TOID (Epoch 36).
Feature counts for this release are provided in the following table:
| Product | Source Product | CSV | GeoPackage |
|---|
There are no missing features and no duplicated TOIDs in this release. No significant errors have been identified.
The next release of OS Open TOID (Epoch 37), is scheduled for 23 August 2024.
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: 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)
OS Data Hub plan: Energy & Infrastructure Plan, OS OpenData Plan (FREE), Premium Plan, Public Sector Plan
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 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.
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.
Access to this product is free through the .
– 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 MasterMap Sites Layer
48 204
48 204
48 204
OS MasterMap Highways Network
20 631 395
20 631 395
20 631 395
OS MasterMap Topography Layer
483 509 875
483 509 875
483 509 875
Total
504 189 474
504 189 474
504 189 474
OS MasterMap Sites Layer | 48 204 | 48 204 | 48 204 |
OS MasterMap Highways Network | 20 578 584 | 20 578 584 | 20 578 584 |
OS MasterMap Topography Layer | 482 332 923 | 482 332 923 | 482 332 923 |
Total | 502 959 711 | 502 959 711 | 502 959 711 |
This release note provides information about the August 2024 release of OS Open TOID (Epoch 37).
Feature counts for this release are provided in the following table:
| Product | Source Product | CSV | GeoPackage |
|---|---|---|---|
There are no missing features and no duplicated TOIDs in this release. No significant errors have been identified.
The next release of OS Open TOID (Epoch 38) is scheduled for 04 October 2024.
OS MasterMap Sites Layer
48 204
48 204
48 204
OS MasterMap Highways Network
20 607 841
20 607 841
20 607 841
OS MasterMap Topography Layer
482 970 398
482 970 398
482 970 398
Total
503 626 443
503 626 443
503 626 443
This overview introduces OS Open TOID and gives context for all users – highlighting key features, providing examples of potential uses, and listing details such as supply formats, currency, etc.
OS Open TOID is an open dataset of unique identifiers – Topographic Identifiers (TOIDs) – assigned by OS to real-world features extracted from the following three OS MasterMap products:
TopographicArea
TopographicLine
TopographicPoint
SiteExtent
OS MasterMap Highways Network – Roads
RoadNode
RoadLink
PathLink
This product allows users to share and link information related to a wide range of landscape and built environment features with a unique identifier and generalised location which will allow them to be used easily by everyone.
TOIDs are unique and persistent identifiers, assigned by OS, for real-world features that have a physical presence in the world around you, such as a building or a road. A TOID consists of the letters ‘osgb’ and either 13 or 16 digits between 0 and 9. The TOID is allocated sequentially when a feature is created by Ordnance Survey and is never reassigned to a different feature.
For the TOID to be fully effective, it is essential that the OS-appointed TOID reference is not altered in any way.
OS Open TOID provides the identifiers for these features along with their generalised location:
Point features: The original location rounded to the nearest metre.
Line features: The midpoint of the line rounded to the nearest metre.
Polygons features: Use a point of inaccessibility algorithm to find a point that is guaranteed to be within the polygon which is farthest from all edges; this location is then rounded to the nearest metre.
Multi-polygon features (SiteExtent): Use the same method as for polygon features on the largest of the polygons.
The key features of the OS Open TOID product are:
The comprehensive inclusion of all Ordnance Survey’s capture of the physical features across Great Britain.
Access to our unique topographic identifiers, allowing you to link to the OS MasterMap products.
A guide to which products the features are sourced from.
The ability to reference between a feature and qualitative data using a unique identifier.
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.
This overview includes the following sections:
OS Open TOID and its associated geometry data layer use the British National Grid (BNG) coordinate reference system (CRS).
BNG uses the OSGB36 geodetic datum and a single Transverse Mercator projection for the whole of Great Britain. Positions on this projection are described using Easting and Northing coordinates in units of metres. The BNG is a horizontal spatial reference system only; it does not specify a vertical (height) reference system.
Please view our 'Guide to Coordinate Systems in Great Britain' for more information on CRSs.
The TOIDs included are drawn from the following feature tables from the following OS MasterMap products:
TopographicArea
TopographicLine
TopographicPoint
Site Extent
RoadNode
RoadLink
PathLink
All features from each feature type above have been included in the OS Open TOID.
For each of the feature types included the following method of generalisation is used for the location:
Point Features: the original location round to the nearest meter.
Lines Features: the midpoint of the line rounded to the nearest meter.
Polygons Features: use a point of inaccessibility algorithm to find a point that is guaranteed to be with in the polygon which is farthest from all edges. This location is then rounded to the nearest meter.
Multi Polygon Features (Site Extent): use the same method as for polygon features on the largest of the polygons.
The OS Open TOID and its associated geometry data layer uses the British National Grid (BNG) spatial reference system. BNG uses the OSGB36 (EPSG 27700) geodetic datum and a single Transverse Mercator projection for the whole of Great Britain. Positions on this projection are described using easting and northing coordinates in units of metres.
Introductory material on the BNG and Ordnance Datum Newlyn (ODN) along with the full definition of the BNG (OSGB36 National Grid) is available on the Ordnance Survey OS Net GPS site: https://www.ordnancesurvey.co.uk/gps/transformation/
A Guide to Coordinate Systems in Great Britain contains more details on working with coordinate systems.
A general introductory guide to BNG is provided at: https://getoutside.ordnancesurvey.co.uk/guides/beginners-guide-to-grid-references/
On this page you'll find product supply information for OS Open TOID, including available formats, the supply mechanism, coverage and currency.
OS Open TOID provides unique identifiers and generalised coordinates for point, line and polygon features from a range of source products. These features are represented by a single point with associated information attached. Both the GeoPackage and CSV formats contain:
TOID (unique identifier)
Source Product (the product the feature can be found in)
Version Number (indication of how many times the feature has been edited)
Version Date (when the feature was last updated)
XY (location derived for the feature)
A JSON (JavaScript Object Notation) file containing version information will also be supplied with the product.
The OS Open TOID and associated geometry data are available in 100km tiles and distributed in two formats using British National Grid (BNG) projection:
GeoPackage (GPKG)
Comma-separated values (CSV)
These formats allow the data to be easily integrated and ingested with either a GIS application or a database, respectively.
GeoPackage (GPKG) is an open standard data format as defined by the Open Geospatial Consortium (OGC). GeoPackage is designed to be a lightweight format that can contain large amounts of varied and complex data in a single, easy-to-distribute and ready-to-use file.
Please be advised that older versions of GIS software may need updating before being able to display and interact with GeoPackage files.
GeoPackage offers users the following benefits:
The single file is easy to transfer and offers the end-user a rich experience.
Attribute names are not limited in length, making it user-friendly.
The file size limit is very large at 140TB, so lots of data can be easily accommodated (please note that a file size limit may be imposed by the file system to which the file is written).
It supports raster, vector and database formats, making it a highly versatile solution.
It is an OGC standard.
In most cases, it is a plug and play format.
For information on how to open, use and understand a GeoPackage dataset, please refer to our ‘Getting Started with GeoPackage’ guide. Further detailed information on GeoPackage can be taken from the GeoPackage website.
CSV files are a delimited text file that uses commas or other characters to separate individual elements of a feature. It is used to store data, often in the form of a table. These tables can be freely loaded into databases and programs, allowing for the easy loading and updating of data holdings.
The CSV format of OS Open TOID means:
The first row will contain header information.
There will be one record per line in each file.
Fields will be separated by commas.
No comma will be placed at the end of each row in the file.
Records will be terminated by Carriage Return / Line Feed.
OS Open TOID is supplied as a free online download and is available without registration from the OS Data Hub.
This product covers Great Britain.
OS Open TOID and associated geometry data are available in 100km tiles and distributed in two product formats (GeoPackage or CSV) using British National Grid (BNG) projection.
OS Open TOID will be updated through a Full Supply on a 6-weekly basis (in-line with the OS MasterMap Topography Layer COU (Change-Only Update) releases outlined in the Product Refresh Dates page and will maintain consistency with the OS MasterMap products).
The OS Open TOID data carries five attributes which are all mandatory for each release. These can be used to identify and link affiliated information for a real-world object as well as plotting its real-world position. The TOID represents a range of feature types which related to an even wider range of real-world object types, examples range from buildings (including those without an address), roads, junctions, bridges, trees, fields and more.
A unique identifier assigned to geospatial data by Ordnance Survey for their MasterMap products.
Type: Varchar
Size: 20
Multiplicity: [1]
The date representing the version of the feature.
Type: Integer
Size: N/A
Multiplicity: [0 ... 1)
The date representing the date the feature was last updated.
Type: Date Time
Size: N/A
Multiplicity: [1]
Attribute indicating which product a feature can be found in.
Type: Varchar
Size: 29
Multiplicity: [1]
A value in meters defining the x location according to the British National Grid.
Type: Float
Size: (precision, scale) - (10, 3)
Multiplicity: [1]
A value in meters defining the y location according to the British National Grid.
Type: Float
Size: (precision, scale) - (10, 3)
Multiplicity: [1]
The GeoPackage data follows the same structure as demonstrated above, except for the inclusion of the following additional attribute:
A non-persistent integer which has been autogenerated as a function of OGC GeoPackage.
Type: Integer
Size: N/A
Multiplicity: [1]
GeoPackage is also split between three different layers to allow for easier data interrogation; these layers are:
os_mastermap_highways_network
os_mastermap_sites_layer
os_mastermap_topography_layer
This technical specification provides detailed technical information about OS Open TOID. It is targeted at technical users and software developers.
OS Open TOID is a comprehensive list of the unique identifiers used in our OS MasterMap data alongside the generalised location of the physical feature. The unique identifier used is the TOID (Topographic Identifier) and is commonly found throughout our data allowing for an easy transition between datasets. It consists of the letters ‘osgb’ followed by either 13 or 16 digits between 0 and 9. In order for the TOID to be effective it is essential that the OS appointed TOID reference is not altered in any way.
The TOID is allocated sequentially when a feature is created by Ordnance Survey and is never reassigned to a different feature. One of the key principles of unique referencing is that the TOID will stay the same throughout the life of a feature. This gives the feature continuity within its life cycle and makes managing change of the product easier.
The product is designed to enable consumers of OpenData that is linked to the TOID to visualise that data in a spatial context. It bridges the gap between the disparate datasets of the OS MasterMap product family and enable the wider adoption of the TOID as a means of a spatial identifier, creating greater linking and sharing data with a spatial context.
This data is usable in a GIS application and can also be integrated into a spatial database.
The OS Open TOIDs and Associated Geometry data will be provided in 100km tiles and distributed in two product formats using British National Grid (EPSG 27700) projection:
Comma-Separated Value (CSV)
GeoPackage (GPKG)
These formats allow the data to be easily integrated and ingested with either a database or a GIS application, respectively. Each tile will contain unique features that will not be shared across multiple tiles, as such there is not a 1:1 feature relationship between the OS Open TOID tiles and those in OSMM Topography Layer.
GeoPackage is an open data format as is defined by the Open Geospatial Consortium (OGC). It is designed to be a lightweight format that contains both spatial (vector) and metadata tables in a single, ready-to-use file. Please note that older versions of GIS software may need updating before being able to display and interact with GeoPackage files.
CSVs are a simple file format used to store data, often in the form of a table or spreadsheet. These tables can be freely loaded into databases and programs allowing for the easy loading and updating of data holdings.
OS Open TOID will be updated on a 6-weekly basis, in line with the OS MasterMap Topography Layer COU (Change Only Update) releases and will maintain consistency with OS MasterMap products.
