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The OS NGD Water Features Collection represents topographic water area features such as watercourses, lakes, drains, springs and intertidal watercourses across Great Britain. The feature types in this collection are Inter Tidal Line, River Basin District Catchment, Tidal Boundary, Water, Water Point, and Waterbody Catchment. Full attribution is given for each feature type, including geometry, feature classification (for example, a drain or reservoir) and other additional information.
Narrow water features which are depicted by a line geometry rather than a polygon geometry are not included in the OS NGD Water Features Collection; however, they can be obtained from the OS NGD Water Network Collection.
The OS NGD Water Features Collection contains both a Water Feature Type and Water Point Feature Type. Within the Water Feature Type, inland water is represented as polygons, whereas in the Water Point Feature Type, inland water is represented as points. To be captured as a polygon, an area of permanent inland water generally has to have a minimum size of 8 sq m. Areas of permanent inland water below this minimum size but which OS consider to be of sufficient interest to be captured are captured as points.
The OS NGD Water Features Collection allows you to:
Ensure your water features data is always up to date with up to daily updates.
Conduct topographic analysis of areas of permanent water, features associated with water, watercourses extending across the tidal zone, and tidal boundaries.
Link water features using persistent unique identifiers for analyses across OS NGD collections.
Significantly enhance the systems used to manage waterways and rivers and the flood risk they pose.
Perform analytics and visual interpretation, particularly when used in combination with data from other OS NGD collections. For example, you could assess land use next to water bodies if you used this collection alongside the OS NGD Land Use Features Collection.
Display bodies of water and water catchments as a backdrop map.
Up to daily updates to data (with the exception of the River Basin District Catchment and Waterbody Catchment Feature Types' data which will be updated as and when updates are received from third-party data from the authoritative bodies).
Plug and play – the data is simple and quick to implement as you don't need to pre-process it before you use it.
Rich attribution ensures the data is straightforward to navigate and query.
Persistent unique identifiers with lifecycle information.
Water Feature Type included which covers inland and tidal topographic water bodies.
Classification and description provided for every topographic water area feature in Great Britain.
Land use and land cover classifications provided for the Water Feature Type.
Authoritative water catchment data from the national water bodies, containing existing catchment names and identifiers for continuity of use.
Land use classification (for example, residential accommodation) provided for the Water Feature Type to indicate the prominent use of the Site which contains the body of water.
National land use standards used to provide universal insights for human activity (NLUD classification and BS7666 national addressing classification).
An Office for National Statistics (ONS) Government Statistical Service (GSS) code is provided for Water features within Lower Tier Local Authority areas to indicate which Lower Tier Local Authority boundary the feature lies within.
Great Britain.
British National Grid (EPSG: 27700).
The earliest date on which you can request a one-off snapshot of a date in the past for data in this collection is noted at the top of the individual feature type pages.
GeoPackage, CSV (comma-separated values), vector tiles or GeoJSON (the latter format is not available for two feature types in the collection: River Basin District Catchment and Waterbody Catchment).
Accessed through the OS Data Hub via:
OS Select+Build
OS NGD API – Tiles
OS NGD API – Features (not available for two feature types in the collection: River Basin District Catchment and Waterbody Catchment)
Included in the Public Sector Geospatial Agreement (PSGA) – therefore, it's free at point of use for Public Sector organisations.
Available to OS Partners for commercial resell in your solutions.
A river basin or several river basins together with associated coastal waters. This is the least-detailed level of catchment published by authoritative bodies. A river basin district is the main unit for management of river basins under the Water Framework Directive.
The Water Framework Directive (WFD) provides a framework for assessing and managing the water environment in the European Union (EU). Since leaving the EU, the WFD has been replaced in England and Wales by the 'Water Environment (Water Framework Directive) (England and Wales) Regulations 2017'. In Scotland, the WFD was transposed into Scottish legislation by the 'Water Environment and Water Services (Scotland) Act 2003'.
The earliest date on which you can request a one-off snapshot of a date in the past for data in this feature type is 28 March 2023.
Please note that if you select Annual Full Supply with an initial supply date of 01 Jan 2023 as the update frequency for a data package containing this feature type in OS Select+Build, this will result in you receiving an empty data package. This is because the data for this feature type was only made available in the OS NGD from 28 March 2023. The Full Annual Supply option for data from this feature type will become available from 01 January 2024.
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
The primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS Select+Build Filterable: No
Data Schema Version: 1.0
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: changetypevalue
Max Length: 50
OS Select+Build Filterable: No
Data Schema Version: 1.0
The geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry Type: MultiPolygon
The measured area of the geometry in square metres.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: false
Precision: 15
Scale: 3
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation that provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 85
OS Select+Build Filterable: No
Data Schema Version: 1.0
The OS NGD theme to which this feature belongs.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: themevalue
Max Length: 40
OS Select+Build Filterable: No
Data Schema Version: 1.0
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: riverbasindistrictcatchmentdescriptionvalue
Max Length: 30
OS Select+Build Filterable: No
Data Schema Version: 1.0
The code of the catchment area assigned by the authoritative body.
Data Types: Integer (GeoJSON), Integer (GPKG), Integer (CSV)
Nullable: false
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The name of the catchment area assigned by the authoritative body.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 15
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
A watercourse that extends across the inter tidal zone.
The earliest date on which you can request a one-off snapshot of a date in the past for data in this feature type is 29 September 2022.
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
Primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 20
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Represents the date on which a feature was first digitised by Ordnance Survey.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry Type: LineString
The measured length of the geometry in metres.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: false
Precision: 15
Scale: 6
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The OS NGD theme to which this feature belongs.
Data Types: Array (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 50
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
An indicator of whether the feature is currently performing its original function.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 10
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
An indicator that the feature is at ground level but lies below another feature represented in the data. For example a road with a bridge over it will have the attribute set to 'True'.
Data Types: Boolean (GeoJSON), Integer (GPKG), String (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The relative relationship of the feature to ground surface level, where ground surface level is the lowest identifiable level that is not underground.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 15
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Indicates the capture specification used by OS when capturing the feature. This could either be Urban, Rural or Moorland.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 10
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Code List Name:
Code List Name:
Code List Name:
Code List Name:
Code List Name:
Code List Name:
The catchment associated with a unit of surface water that is the whole (or part) of a stream, river or canal, lake or reservoir, estuary, or stretch of coastal water. This is the detailed level of catchment published by authoritative bodies for the implementation of the Water Framework Directive.
The Water Framework Directive (WFD) provides a framework for assessing and managing the water environment in the European Union (EU). Since leaving the EU, the WFD has been replaced in England and Wales by the 'Water Environment (Water Framework Directive) (England and Wales) Regulations 2017'. In Scotland, the WFD was transposed into Scottish legislation by the 'Water Environment and Water Services (Scotland) Act 2003'.
The earliest date on which you can request a one-off snapshot of a date in the past for data in this feature type is 28 March 2023.
Please note that if you select Annual Full Supply with an initial supply date of 01 Jan 2023 as the update frequency for a data package containing this feature type in OS Select+Build, this will result in you receiving an empty data package. This is because the data for this feature type was only made available in the OS NGD from 28 March 2023. The Full Annual Supply option for data from this feature type will become available from 01 January 2024.
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
The primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date when the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS Select+Build Filterable: No
Data Schema Version: 1.0
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: changetypevalue
Max Length: 50
OS Select+Build Filterable: No
Data Schema Version: 1.0
The measured area of the geometry in square metres.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: false
Precision: 15
Scale: 3
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation that provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 85
OS Select+Build Filterable: No
Data Schema Version: 1.0
The OS NGD theme to which this feature belongs.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: themevalue
Max Length: 40
OS Select+Build Filterable: No
Data Schema Version: 1.0
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: waterbodycatchmentdescriptionvalue
Max Length: 20
OS Select+Build Filterable: No
Data Schema Version: 1.0
The ID classification of waterbodies.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 15
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
An indicator of the nature of a Waterbody Catchment.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: waterbodycategoryvalue
Max Length: 5
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The name of the waterbody which the feature is part of.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 254
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The third-party authoritative body who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 85
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
A reference to the identifier of the River Basin District Catchment within which a Waterbody Catchment is located.
Data Types: Integer (GeoJSON), Integer (GPKG), Integer (CSV)
Nullable: false
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
A reference to the name of the River Basin District Catchment within which a Waterbody Catchment is located.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 15
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The country in which the Waterbody Catchment is primarily or wholly contained. The expected values are England, Wales, and Scotland.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: countryvalue
Max Length: 10
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The alignment of the limit of tidal water at specific states of the tide.
The earliest date on which you can request a one-off snapshot of a date in the past for data in this feature type is 29 September 2022.
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
Primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 20
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Represents the date on which a feature was first digitised by Ordnance Survey.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: changetypevalue
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry Type: LineString
The measured length of the geometry in metres.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: false
Precision: 15
Scale: 6
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The OS NGD theme to which this feature belongs.
Data Types: Array (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: themevalue
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: tidalboundarydescriptionvalue
Max Length: 50
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The nature of the tidal mark being represented
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: watermarkvalue
Max Length: 40
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
An indicator that the feature is at ground level but lies below another feature represented in the data. For example a road with a bridge over it will have the attribute set to 'True'.
Data Types: Boolean (GeoJSON), Integer (GPKG), String (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The relative relationship of the feature to ground surface level, where ground surface level is the lowest identifiable level that is not underground.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: physicallevelvalue
Max Length: 15
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Indicates the capture specification used by OS when capturing the feature. This could either be Urban, Rural or Moorland.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: capturespecificationvalue
Max Length: 10
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The OS NGD Water Theme contains both the topographic and network representations of water features across Great Britain. The theme is made up of two collections (OS NGD Water Features and OS NGD Water Network), which in turn are made up of a combined total of nine feature types.
The OS NGD Water Features Collection contains topographic feature types that have geometry, feature classification (for example, a drain or an open reservoir) and other additional information attributed:
Inter Tidal Line features represent watercourses that extend across the inter tidal zone.
River Basin District Catchment features define a river basin or several river basins, together with coastal waters, as published by the authoritative national water bodies.
Tidal Boundary features show the alignment of the limit of tidal water at specific states of the tide.
Areas of permanent water are listed as Water features – these are a polygon topographic representation only.
Features associated with permanent water which are too small to be captured as a Water feature but are considered to be of interest for capture are listed as Water Point features (for example, a waterfall).
Waterbody Catchment features represent the unit of surface water being the whole (or part) of a stream, river or canal, lake or reservoir, as published by the authoritative national water bodies.
Narrow water features which are depicted by a line geometry rather than a polygon geometry are not included in the OS NGD Water Features Collection; however, they can be obtained from the OS NGD Water Network Collection.
The OS NGD Water Network Collection provides a three-dimensional structured link and node network of watercourses for Great Britain. This collection includes the feature types of Water Link, Water Link Set and Water Node:
A Water Link feature is a network representation of the general alignment and connectivity of permanent water (including inland rivers, tidal water, lakes, canals, and so on); each link is attributed with additional information (for example, flow direction and catchment name).
A Water Link Set feature represents a body of water with an accepted name that the water network flows through; it provides a single geometry for a complete named watercourse. Water Link Set features will be provided with a cross reference table, referencing the Water Link Set back to the Water Links of which it is comprised.
A Water Node feature depicts the location where a connected area of permanent water ends, where an area of permanent water is connected to two or more other areas of permanent water, or where a recorded attribute changes for an area of permanent water.
The OS NGD Water Theme is made up of two collections: OS NGD Water Features and OS NGD Water Network. The OS NGD Water Features Collection is comprised of six feature types: Inter Tidal Line, River Basin District Catchment, Tidal Boundary, Water, Water Point, and Waterbody Catchment. The OS NGD Water Network Collection is made up of three feature types: Water Link, Water Link Set, and Water Node.
With the exception of the River Basin District Catchment, Waterbody Catchment, and Water Link Set features, two unique identifiers are provided with each feature within the OS NGD Water Theme:
OSID (Ordnance Survey Identifier): The primary identifier and unique key for this theme.
TOID (Topographic Identifier): An additional secondary identifier which can aid further data linking. TOIDs are an optional attribute and therefore will not always be provided with every feature.
River Basin District Catchment, Waterbody Catchment and Water Link Set features do not have TOIDs allocated to them; however, they do have OSIDs allocated to them.
The location where a connected area of permanent water ends, where an area of permanent water is connected to two or more other areas of permanent water, or where a recorded attribute changes for an area of permanent water.
The earliest date on which you can request a one-off snapshot of a date in the past for data in this feature type is 29 September 2022.
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
Primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 20
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
3D geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry Type: Point
The OS NGD theme to which this feature belongs.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 8
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
A network representation of the general alignment and connectivity of permanent water, including rivers, lakes, and canals.
The earliest date on which you can request a one-off snapshot of a date in the past for data in this feature type is 29 September 2022.
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
Primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 20
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: changetypevalue
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
3D geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry Type: LineString
The measured length of the geometry in metres.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: false
Precision: 15
Scale: 6
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: waterlinkgeometrysourcevalue
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The OS NGD theme to which this feature belongs.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: themevalue
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: waterlinkdescriptionvalue
Max Length: 12
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Value indicating the relative importance of the water network link within any larger watercourse it is part of.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: waterlinkprimacyvalue
Max Length: 1
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Expresses whether the water network link represents inland or tidal water.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: waterlinkwatertypevalue
Max Length: 6
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The physical level of the feature, for example 'Surface Level' or 'Level 1' if it is on a supported structure.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: physicallevelvalue
Max Length: 15
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Value indicating whether the water network link in contained in a culvert, tunnel or natural subterranean passage.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: waterlinkphysicalcontainmentvalue
Max Length: 31
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Direction of water flow in the segment relative to digitisation of segment geometry.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: waterlinkflowdirectionvalue
Max Length: 12
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Describes if the watercourse contains water year round (in normal conditions) or only contains water intermittently. For example, a flood relief channel would be considered to be Intermittent.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: waterlinkpermanencevalue
Max Length: 12
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Indicates the capture specification used by OS when capturing the feature. This could either be Urban, Rural or Moorland.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: capturespecificationvalue
Max Length: 10
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
A calculated value indicating the relative cartographic importance of a Water Link to aid selection and depiction when styling the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: waterlinklevelofdetailvalue
Max Length: 8
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The name of the catchment area where the WaterLink falls, assigned by a responsible body. The responsible bodies are Environment Agency for England, Scottish Environmental Protection Agency for Scotland, and Natural Resources Wales for Wales. In rare cases where the WaterLink falls inside more than one catchment or is not inside any catchment (for example in the sea), the catchmentName is set to null.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The code of the catchment area where the WaterLink falls, assigned by a responsible body. The responsible bodies are Environment Agency for England. Scottish Environmental Protection Agency for Scotland and Natural Resources Wales for Wales. In rare cases where the WaterLink is in more than one catchment or is not inside any catchment (for example in the sea), the catchmentID is set to null.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 20
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The average width of the watercourse along the WaterLink expressed in metres. For WaterLink features derived from Ordnance Survey large scale single line features, the width is currently set to null.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: true
Precision: 7
Scale: 2
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
A calculated percentage value that indicates the rate of descent of the surface of the water. The gradient is derived by dividing the Vertical Drop by the Length of the link and multiplying by 100. NOTE: where the gradient does not correlate with the flow, this value is set to null.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: true
Precision: 5
Scale: 2
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The Water Node coincident with the first vertex for this Water Link.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The Water Node coincident with the last vertex for this Water Link.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The identifier of the name of the Water Link used to differentiate between features with the same name.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 36
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Name assigned to identify the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: languagevalue
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The alternative language name assigned to identify the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: languagevalue
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The identifier of the secondary name of the Water Link used to differentiate between features with the same name.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The name of a sub-section of the feature, normally representing a named stretch of water or pool.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language of nameSecondary1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: languagevalue
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language alternative name of a sub-section of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language of nameSecondary2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: languagevalue
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The identifier of the tertiary name of the Water Link used to differentiate between features with the same name.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The name of a smaller sub-section of the feature, normally representing a named stretch of water or pool.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language of nameTertiary2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: languagevalue
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language alternative name of the smaller sub-section of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language of nameTertiary2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: languagevalue
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The OS NGD Water Network Collection provides a three-dimensional structured link and node network of watercourses for Great Britain. Rivers, streams, lakes, lochs, drains and canals are represented as a series of network lines. There are three feature types in the collection: Water Link, Water Node, and Water Link Set.
The OS NGD Water Network Collection allows you to:
Keep your water network data up to date and accurate with quarterly updates.
Have a comprehensive and highly detailed digital representation of the watercourse network in Great Britain.
Significantly enhance the systems used to manage waterways and rivers.
Use the rich attribution to assign the likelihood of water movement and monitor any upstream pollution.
Predict and model flooding and establish appropriate flood protection and response measures.
Perform analytics and visual interpretation, particularly when used in combination with data from other OS NGD collections, for example, the OS NGD Building Features Collection.
Manage statutory directives relating to watercourses.
Conduct ecology studies, for example, species migration.
Filter, select and refine data using the Description attribute that's assigned to all features.
Quarterly updates to data.
Plug and play – the data is simple and quick to implement as you don't need to pre-process it before you use it.
Rich attribution ensures the data is straightforward to navigate and query.
Persistent unique identifiers with lifecycle information.
The Water Link Set Feature Type provides a single geometry for a complete named watercourse.
Cross reference table provided so you can easily link data between Water Link Set and Water Link features.
The names of watercourses (where present) are given at primary, secondary and tertiary levels, including language alternatives.
Great Britain.
British National Grid + ODN Height (EPSG: 7405) for the Water Link and Water Node Feature Types; British National Grid (EPSG: 27700) for the Water Link Set Feature Type.
The earliest date on which you can request a one-off snapshot of a date in the past for data in this collection is noted at the top of the individual feature type pages.
GeoPackage, CSV (comma-separated values), GeoJSON or vector tiles.
Accessed through the OS Data Hub via:
OS Select+Build
OS NGD API – Features
OS NGD API – Tiles
Included in the Public Sector Geospatial Agreement (PSGA) – therefore, it's free at point of use for Public Sector organisations.
Available to OS Partners for commercial resell in your solutions.
Polygon feature representing an area of permanent inland water.
The OS NGD Water Features Collection contains both a Water Feature Type and Water Point Feature Type. Within the Water Feature Type, inland water is represented as polygons, whereas in Water Point Feature Type, inland water is represented as points. To be captured as a polygon, an area of permanent inland water generally has to have a minimum size of 8 sq m. Areas of permanent inland water below this minimum size but which OS consider to be of sufficient interest to be captured are captured as points.
The earliest and latest dates on which you can request a one-off snapshot of a date in the past for the data schema versions available for this feature type are detailed in the following table:
| Data schema version | Earliest date | Latest date |
|---|
Please see for more information about versioning in the OS NGD Water Theme.
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
Primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 20
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
Date on which the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The date on which this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The date on which this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The date on which a feature was first digitised by Ordnance Survey.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: Yes
Data Schema Version: 1.0, 2.0, 3.0
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
Geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
Geometry Type: Polygon
This attribute was called geometry_area in data schema version 1.0 and was renamed geometry_area_m2 from version 2.0 onward.
The measured area of the geometry in square metres.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: false
Precision: 15
Scale: 3
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: false
Precision: 15
Scale: 6
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example, the date of collection by a surveyor or the date information was received from a third party.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The date on which the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The source organisation that provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Indication of the method used to capture or produce the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 25
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
The OS NGD theme to which this feature belongs.
Data Types: Array (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 50
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0, 2.0, 3.0
The date on which the latest evidence was gathered to make an update if required. For example, the date of collection by a surveyor or the date information was received from a third party.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
Date on which the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The source organisation that provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Indication of the method used to capture or produce the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 25
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
A high-level description of the land cover; more detail is provided in the OS Land Cover Tier B attribute.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 25
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0, 2.0, 3.0
A detailed description of the land cover type. Up to five distinct land cover types can be applied.
The max length specified below is the maximum length of 1 permissible value. This attribute can have up to 5 permissible values.
Data Types: Array (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 125
Multiplicity: [1..5]
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The date on which the latest evidence was gathered to make an update if required. For example, the date of collection by a surveyor or the date information was received from a third party.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
Date on which the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The organisation that provided the information.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Indication of the method used to capture or produce the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 25
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 2.0, 3.0
A high-level description of the main activity that takes place at the location or that the feature supports.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 50
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0, 2.0, 3.0
A detailed description of the main activity that takes place at the location or that the feature supports.
Data Types: Array (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 200
Multiplicity: [0..2]
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The date on which the latest evidence was gathered to make an update if required. For example, the date of collection by a surveyor or the date information was received from a third party.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
Date on which the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The organisation that provided the information.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Indication of the method used to capture or produce the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 25
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
An indicator whether an area of water is normally tidal.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 10
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0, 2.0, 3.0
Indicates whether the feature is part of a larger structure and the nature of the structure, for example, a dam, bridge or breakwater.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 25
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
An indicator of whether the feature is currently performing its original function.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 10
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0, 2.0
An indicator that the feature is at ground level but lies below another feature represented in the data. For example, a road with a bridge over it will have the attribute set to 'True'.
Data Types: Boolean (GeoJSON), Integer (GPKG), String (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
The relative relationship of the feature to ground surface level, where ground surface level is the lowest identifiable level that is not underground.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 15
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
Indicates the capture specification used by OS when capturing the feature. This could be Urban, Rural or Moorland.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 10
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0, 2.0, 3.0
A count of the number of Land Use Sites the feature lies within.
Data Types: Integer (GeoJSON), Integer (GPKG), Integer (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
The identifier of the smallest Land Use Site feature that the topographic area feature lies within.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
A high-level description of the main activity that takes place at the location of the smallest Land Use Site feature the feature lies within, if any.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
A more detailed description of the main activity that takes place at the location of the smallest Land Use Site feature the feature lies within, if any.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 200
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
A high-level description of the main activity that takes place at the location of the largest Land Use Site feature the feature lies within, if any.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
A more detailed description of the main activity that takes place at the location of the largest Land Use Site feature the feature lies within, if any.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 200
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
An alternative land use classification that uses a code defined in the National Land Use Database schema. Populated in the first instance from the land use of the largest Land Use Site (if any) that the feature lies within, and if that does not apply, then by any land use implicit in the nature of the feature itself.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 4
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
A description of the highest (least detailed) level of an alternative land use classification as defined in the National Land Use Database schema. Populated in the first instance from the land use of the largest Land Use Site (if any) that the feature lies within, and if that does not apply, then by any land use implicit in the nature of the feature itself.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 30
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
A description of the second level of an alternative land use classification as defined in the National Land Use Database schema. Populated in the first instance from the land use of the largest Land Use Site (if any) that the feature lies within, and if that does not apply, then by any land use implicit in the nature of the feature itself.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
An alternative land use classification that uses a code defined in the Address/BS7666 schema. Populated only where local authority address information lies within a Land Use Site that the feature also falls within. The value is derived by analysis of the attribution of Address information that falls within the extent of the smallest Land Use Site that the feature lies within. Where the address information within the extent of the Site contains differing primary level classifications, then no Address Code value is provided.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 2
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
The description of the highest (least detailed) level of an alternative land use classification as defined in the Address/BS7666 schema. Populated only where local authority address information lies within a Land Use Site that the feature also falls within. The value is derived by analysis of the attribution of Address information that falls within the extent of the smallest Land Use Site that the feature lies within. Where the address information within the extent of the Site contains differing primary level classifications, then a value of ‘Mixed’ is applied.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 120
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
The description of the second level of an alternative land use classification as defined in the Address/BS7666 schema. Populated only where local authority address information lies within a Land Use Site that the feature also falls within. The value is derived by analysis of the attribution of Address information that falls within the extent of the smallest Land Use Site that the feature lies within. Where the address information within the extent of the Site contains differing secondary level classifications, then no value is provided.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 120
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
The unique identifier of the Lower Tier Local Authority administrative area provided by the Office for National Statistics that the Topographic feature lies within. Where a Topographic area falls into more than one Lower Tier Local Authority, then it will be assigned to the Lower Tier Local Authority that the majority of its area lies within. Where a Topographic area falls outside any Lower Tier Local Authority (for example, an offshore feature), then no code will be provided.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 10
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
The total number of Lower Tier Local Authority administrative areas the feature lies within. Where a feature falls within more than one LTLA and the resultant subdivided areas are either less than 10% of original total area or are less than 2 square metres in area then the count excludes these smaller subdivided areas from the value provided.
Data Types: Integer (GeoJSON), Integer (GPKG), Integer (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
The state of the feature in relation to either its physical condition or the activity the feature is intended to support.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 20
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
A cross reference table mapping the OS land cover classification to habitat classification schemes – European Nature Information System (EUNIS) and UK Biodiversity Action Plan (BAP) Broad Habitats – and providing the percentage of each land cover classification within a topographic area, except Water features.
The following sub-sections provide details about the attributes included in this cross reference table, their data types in the different output formats, and other important metadata about them.
Primary feature identifier of the feature reference.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
The name of the land cover or habitat classification scheme. This is OS Land Cover Tier B, EUNIS Level 1, EUNIS Level 2 or UK BAP Broad Habitats.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 20
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
This is populated only when ‘Scheme’ is EUNIS Level 1 or EUNIS Level 2, and where a direct mapping is possible to the OS Land Cover Tier B classification.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 5
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
Classification of the type of land cover or habitat within a topographic area. EUNIS Level 2 and UK BAP Broad Habitat descriptions are populated where a direct mapping is possible to the OS Land Cover Tier B classification.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 80
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
Numerical value for the proportion of each land cover classification within a topographic area. Values are rounded up to the nearest 5 percent, with a minimum value of 10 percent. EUNIS Level 2 and UK BAP Broad Habitat percentages are populated where a direct mapping is possible to the OS Land Cover Tier B classification. This is not populated for Water features.
Data Types: Integer (GeoJSON), Integer (GPKG), Integer (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
The date the latest evidence was gathered and used to calculate the percentage value.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
The date the percentage attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
The date of the latest Water feature version.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 2.0, 3.0
A cross reference table mapping Water to Site. The following sub-sections provide details about the attributes included in this cross reference table, their data types in the different output formats, and other important metadata about them.
The identifier for the Site feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
The identifier for the Water feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
The date this version of the feature entered the OS National Geographic Database.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 3.0
A body of water with an accepted name that the water network flows through.
The earliest date on which you can request a one-off snapshot of a date in the past for data in this feature type is 29 September 2022.
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
Primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry Type: MultiLineString
The measured length of the geometry in metres.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: false
Precision: 15
Scale: 6
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The OS NGD theme to which this feature belongs.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 29
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example, the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Name assigned to identify the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 254
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example, the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The organisation that provided the information.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The alternative language name assigned to identify the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example, the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The organisation that provided the information.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
A cross reference table mapping Water Link Set to Water Link. The following sub-sections provide details about the attributes included in this cross reference table, their data types in the different output formats, and other important metadata about them.
The identifier for the Water Link feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The identifier for the Water Link Set feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature entered the OS National Geographic Database.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Point feature associated with permanent inland water that is too small to be captured as a feature but which OS consider to be of sufficient interest to be captured.
The OS NGD Water Features Collection contains both a Water Feature Type and Water Point Feature Type. Within the Water Feature Type, inland water is represented as polygons, whereas in Water Point Feature Type, inland water is represented as points. To be captured as a polygon, an area of permanent inland water generally has to have a minimum size of 8 sq m. Areas of permanent inland water below this minimum size but which OS consider to be of sufficient interest to be captured are captured as points.
The earliest date on which you can request a one-off snapshot of a date in the past for data in this feature type is 29 September 2022.
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
Primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 20
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Represents the date on which a feature was first digitised by Ordnance Survey.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry Type: Point
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The OS NGD theme to which this feature belongs.
Data Types: Array (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 50
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Name assigned to identify the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The organisation that provided the information.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The alternative language name assigned to identify the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The organisation that provided the information.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
An indicator of whether the feature is currently performing its original function.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 10
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
An indicator that the feature is at ground level but lies below another feature represented in the data. For example a road with a bridge over it will have the attribute set to 'True'.
Data Types: Boolean (GeoJSON), Integer (GPKG), String (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
The relative relationship of the feature to ground surface level, where ground surface level is the lowest identifiable level that is not underground.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 15
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Indicates the capture specification used by OS when capturing the feature. This could either be Urban, Rural or Moorland.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 10
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Code List Name:
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See for additional information about this cross reference table.
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1.0 | 29 September 2022 | Ongoing |
2.0 | 27 March 2024 | Ongoing |
3.0 | 25 September 2024 | Ongoing |
