In the OS NGD Boundaries Collection, the mean high water (springs) mark is shown to the normal tidal limit (NTL). Areas of salt marsh, mudflats and so on often have extremely complicated tide lines. For ease of digitising and to reduce data volumes, mean high water may be generalised in these areas (not Scotland). The mean high water (springs) mark is represented in the OS NGD Boundaries Collection by a polyline feature. The mean high water (springs) mark is subject to continuous change, but the captured alignment of a tide line is a snapshot on one day. It is not practical to revise tide lines frequently.

Temporal filtering

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.

Feature type attributes

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.

osid

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 (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versiondate

Date when the version was last updated.

• Data Types: Date (GPKG), Date (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailablefromdate

The date this version of the feature became the latest version.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailabletodate

The date this version of the feature was superseded by an update or ceased to exist.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: true

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

changetype

The type of change that generated a new version of the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: changetypevalue

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

geometry

Geometry for the feature.

• Data Types: Geometry (GPKG), WKT (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

• Geometry Type: LineString

geometry_length

The measured length of the geometry in metres.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 18

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

theme

The OS NGD theme to which this feature belongs.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: themevalue

• Max Length: 40

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

description

A single descriptive value intended for a quick understanding of what the feature represents.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: boundaryhighwatermarkdescriptionvalue

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

boundarytype

A single description value for boundary type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: boundarytypevalue

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

The countries of Great Britain.

Temporal filtering

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.

Feature type attributes

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.

osid

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 (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable:

• Data Schema Version: 1.0

toid

Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 20

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

versiondate

Date when the version was last updated.

• Data Types: Date (GPKG), Date (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailablefromdate

The date this version of the feature became the latest version.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailabletodate

The date this version of the feature was superseded by an update or ceased to exist.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: true

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

changetype

The type of change that generated a new version of the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: changetypevalue

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

geometry

Geometry for the feature.

• Data Types: Geometry (GPKG), WKT (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

• Geometry Type: MultiPolygon

geometry_area

The measured area of the geometry in square metres.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 18

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

theme

The OS NGD theme to which this feature belongs.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: themevalue

• Max Length: 40

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

description

A single descriptive value intended for a quick understanding of what the feature represents.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: countrydescriptionvalue

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_text

Name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_language

The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Code List Name: languagevalue

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

name2_text

The alternative language name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name2_language

The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Code List Name: languagevalue

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

gsscode

Set to the census / Government Statistical Service (GSS) Code for the boundary, for example, E10000014.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 10

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

boundarytype

A single description value for boundary type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: boundarytypevalue

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

landareahectares

The inland area of the feature in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

tidalareahectares

The non-inland area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

totalareahectares

The total area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

A ceremonial county is an area that has an appointed Lord Lieutenant and High Sheriff and is used for ceremonial purposes in relation to the monarchy. These areas are referred to as ceremonial counties in England, as Scottish lieutenancy areas in Scotland, and as preserved counties in Wales.

Legally, the ceremonial counties are defined by the Lieutenancies Act 1997 as "Counties and areas for the purposes of the lieutenancies in Great Britain" with reference to the areas used for local government.

Ceremonial counties are not updated; therefore, the lifecycle dates will not change.

Temporal filtering

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.

Feature type attributes

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.

osid

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 (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versiondate

Date when the version was last updated.

• Data Types: Date (GPKG), Date (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailablefromdate

The date this version of the feature became the latest version.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailabletodate

The date this version of the feature was superseded by an update or ceased to exist.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: true

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

changetype

The type of change that generated a new version of the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: changetypevalue

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

geometry

Geometry for the feature.

• Data Types: Geometry (GPKG), WKT (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

• Geometry Type: MultiPolygon

geometry_area

The measured area of the geometry in square metres.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 18

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

theme

The OS NGD theme to which this feature belongs.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: themevalue

• Max Length: 40

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

description

A single descriptive value intended for a quick understanding of what the feature represents.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: ceremonialcountydescriptionvalue

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_text

Name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_language

The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Code List Name: languagevalue

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

name2_text

The alternative language name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name2_language

The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Code List Name: languagevalue

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundarytype

A single description value for boundary type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Code List Name: boundarytypevalue

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

landareahectares

The inland area of the feature in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

tidalareahectares

The non-inland area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

totalareahectares

The total area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

Scotland is divided into parliamentary constituencies for voting purposes to elect Members of the Scottish Parliament (MSPs). Wales is divided into parliamentary constituencies for voting purposes to elect parliamentary members (MS) to the Welsh Parliament.

Temporal filtering

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.

Feature type attributes

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.

osid

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 (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

toid

Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 20

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

versiondate

Date when the version was last updated.

• Data Types: Date (GPKG), Date (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailablefromdate

The date this version of the feature became the latest version.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailabletodate

The date this version of the feature was superseded by an update or ceased to exist.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: true

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

changetype

The type of change that generated a new version of the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

geometry

Geometry for the feature.

• Data Types: Geometry (GPKG), WKT (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

• Geometry Type: MultiPolygon

geometry_area

The measured area of the geometry in square metres.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 18

• Scale: 6

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

theme

The OS NGD theme to which this feature belongs.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 40

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

description

A single descriptive value intended for a quick understanding of what the feature represents.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_text

Name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_language

The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

name2_text

The alternative language name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name2_language

The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

gsscode

Set to the census / Government Statistical Service (GSS) Code for the boundary, for example, E10000014.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 10

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

boundarytype

A single description value for boundary type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

boundaryparentreference_id

Identifier for the Parent Boundary

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_featuretype

Further classification indicating the Parent Boundary feature type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_classification

Further classification indicating the Parent Boundary.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_name1_text

Name assigned to identify the Parent Boundary. If the name is defined in multiple languages, then each name shall be provided with an associated language qualifier. If the proper name is only defined in one language, then no language qualifier will be provided.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_name1_language

The language type associated with name1 for the Parent Boundary. The valid values are defined in the LanguageValue codelist.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_name2_text

Name assigned to identify the Parent Boundary. If the name is defined in multiple languages, then each name shall be provided with an associated language qualifier. If the proper name is only defined in one language, then no language qualifier will be provided.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_name2_language

The language type associated with name2 for the Parent Boundary. The valid values are defined in the LanguageValue codelist.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

landareahectares

The inland area of the feature in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

tidalareahectares

The non-inland area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

totalareahectares

The total area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

With the introduction of the regional government for London (referred to as the Greater London Authority or GLA by OS NGD documentation), the proportional representation voting area for this new administration is the GLA Assembly Constituency.

Temporal filtering

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.

Feature type attributes

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.

osid

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 (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

toid

Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 20

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

versiondate

Date when the version was last updated.

• Data Types: Date (GPKG), Date (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailablefromdate

The date this version of the feature became the latest version.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailabletodate

The date this version of the feature was superseded by an update or ceased to exist.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: true

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

changetype

The type of change that generated a new version of the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

geometry

Geometry for the feature.

• Data Types: Geometry (GPKG), WKT (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

• Geometry Type: Polygon

geometry_area

The measured area of the geometry in square metres.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 18

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

theme

The OS NGD theme to which this feature belongs.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 40

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

description

A single descriptive value intended for a quick understanding of what the feature represents.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_text

Name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_language

The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

name2_text

The alternative language name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name2_language

The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

gsscode

Set to the census / Government Statistical Service (GSS) Code for the boundary, for example, E10000014.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 10

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

boundarytype

A single description value for boundary type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

boundaryparentreference_id

Identifier for the Parent Boundary

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_featuretype

Further classification indicating the Parent Boundary feature type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_classification

Further classification indicating the Parent Boundary.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_name1_text

Name assigned to identify the Parent Boundary. If the name is defined in multiple languages, then each name shall be provided with an associated language qualifier. If the proper name is only defined in one language, then no language qualifier will be provided.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_name1_language

The language type associated with name1 for the Parent Boundary. The valid values are defined in the LanguageValue codelist.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_name2_text

Name assigned to identify the Parent Boundary. If the name is defined in multiple languages, then each name shall be provided with an associated language qualifier. If the proper name is only defined in one language, then no language qualifier will be provided.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference_name2_language

The language type associated with name2 for the Parent Boundary. The valid values are defined in the LanguageValue codelist.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

landareahectares

The inland area of the feature in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

tidalareahectares

The non-inland area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

totalareahectares

The total area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

For voting purposes, a county is divided into electoral divisions. In Wales, the voting area is the unitary authority electoral division; in Scotland, it is the unitary authority ward; and in England, it is the unitary authority ward or unitary authority electoral division.

Temporal filtering

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.

Feature type attributes

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.

osid

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 (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

toid

Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 20

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

versiondate

Date when the version was last updated.

• Data Types: Date (GPKG), Date (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailablefromdate

The date this version of the feature became the latest version.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailabletodate

The date this version of the feature was superseded by an update or ceased to exist.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: true

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

changetype

The type of change that generated a new version of the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

geometry

Geometry for the feature.

• Data Types: Geometry (GPKG), WKT (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

• Geometry Type: MultiPolygon

geometry_area

The measured area of the geometry in square metres.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 18

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

theme

The OS NGD theme to which this feature belongs.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 40

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

description

A single descriptive value intended for a quick understanding of what the feature represents.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_text

Name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_language

The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

name2_text

The alternative language name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name2_language

The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

gsscode

Set to the census / Government Statistical Service (GSS) Code for the boundary, for example, E10000014.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 10

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

boundarytype

A single description value for boundary type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

boundaryparentreference1_id

Identifier for the Parent Boundary.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference1_featuretype

Further classification indicating the Parent Boundary feature type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference1_classification

Further classification indicating the Parent Boundary.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference1_name1_text

Name assigned to identify the Parent Boundary. If the name is defined in multiple languages, then each name shall be provided with an associated language qualifier. If the proper name is only defined in one language, then no language qualifier will be provided.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference1_name1_language

The language type associated with name1 for the Parent Boundary. The valid values are defined in the LanguageValue codelist.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference1_name2_text

Name assigned to identify the Parent Boundary. If the name is defined in multiple languages, then each name shall be provided with an associated language qualifier. If the proper name is only defined in one language, then no language qualifier will be provided.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference1_name2_language

The language type associated with name2 for the Parent Boundary. The valid values are defined in the LanguageValue codelist.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference2_id

Identifier for the Parent Boundary.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference2_featuretype

Further classification indicating the Parent Boundary feature type.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference2_classification

Further classification indicating the Parent Boundary.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference2_name1_text

Name assigned to identify the Parent Boundary. If the name is defined in multiple languages, then each name shall be provided with an associated language qualifier. If the proper name is only defined in one language, then no language qualifier will be provided.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference2_name1_language

The language type associated with name1 for the Parent Boundary. The valid values are defined in the LanguageValue codelist.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference2_name2_text

Name assigned to identify the Parent Boundary. If the name is defined in multiple languages, then each name shall be provided with an associated language qualifier. If the proper name is only defined in one language, then no language qualifier will be provided.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundaryparentreference2_name2_language

The language type associated with name2 for the Parent Boundary. The valid values are defined in the LanguageValue codelist.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

landareahectares

The inland area of the feature in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

tidalareahectares

The non-inland area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

totalareahectares

The total area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

hasdetachedpart

Boolean set to true if the feature applies to portions of local government or parliamentary constituency areas which are separated from the main area, being completely surrounded by other local government or parliamentary constituency areas and not connected by direct access on the ground; otherwise, Boolean set to false.

• Data Types: Integer (GPKG), String (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

The Scottish Parliament electoral region is a grouping of Scottish Parliament constituencies. The Welsh Parliament electoral region is a grouping of Welsh Parliament constituencies.

Temporal filtering

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.

Feature type attributes

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.

osid

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 (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

toid

Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 20

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

versiondate

Date when the version was last updated.

• Data Types: Date (GPKG), Date (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailablefromdate

The date this version of the feature became the latest version.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailabletodate

The date this version of the feature was superseded by an update or ceased to exist.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: true

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

changetype

The type of change that generated a new version of the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

geometry

Geometry for the feature.

• Data Types: Geometry (GPKG), WKT (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

• Geometry Type: MultiPolygon

geometry_area

The measured area of the geometry in square metres.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 18

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

theme

The OS NGD theme to which this feature belongs.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 40

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

description

A single descriptive value intended for a quick understanding of what the feature represents.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_text

Name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_language

The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

name2_text

The alternative language name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name2_language

The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

gsscode

Set to the census / Government Statistical Service (GSS) Code for the boundary, for example, E10000014.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 10

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

boundarytype

A single description value for boundary type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

landareahectares

The inland area of the feature in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

tidalareahectares

The non-inland area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

totalareahectares

The total area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

The exit of the United Kingdom from the European Union on 01 January 2021 resulted in the repeal of the European Regions as active electoral areas. For the purposes of Boundary Review, the original European Regions in England have been retained as nine English Regions, preserved as of 01 April 2021.

Historic European Regions are not updated; therefore, the lifecycle dates will not change.

Temporal filtering

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.

Feature type attributes

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.

osid

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 (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versiondate

Date when the version was last updated.

• Data Types: Date (GPKG), Date (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailablefromdate

The date this version of the feature became the latest version.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailabletodate

The date this version of the feature was superseded by an update or ceased to exist.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: true

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

changetype

The type of change that generated a new version of the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

geometry

Geometry for the feature.

• Data Types: Geometry (GPKG), WKT (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

• Geometry Type: MultiPolygon

geometry_area

The measured area of the geometry in square metres.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 18

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

theme

The OS NGD theme to which this feature belongs.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 40

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

description

A single descriptive value intended for a quick understanding of what the feature represents.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_text

Name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_language

The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

name2_text

The alternative language name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name2_language

The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundarytype

A single description value for boundary type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

landareahectares

The inland area of the feature in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

tidalareahectares

The non-inland area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

totalareahectares

The total area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

The Historic counties data shows the county boundaries based on records and mapping circa 1888, using the following acts as primary sources:

• Local Government (England and Wales) Act 1888

• Local Government (Scotland) Act 1889

• Sheriffs Act 1887

The dataset shows the boundaries in place in 1888 in England and Wales, and those established a year later in Scotland. The alignments of the counties for England and Wales are derived from mapping sourced from the National Archives which dates from 1890. The most recent available county alignment mapping for Scotland is from 1940.

Historic counties are not updated; therefore, the lifecycle dates will not change.

Temporal filtering

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.

Feature type attributes

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.

osid

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 (GPKG), String (CSV)

• Nullable: false

• Max Length: 36

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versiondate

Date when the version was last updated.

• Data Types: Date (GPKG), Date (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailablefromdate

The date this version of the feature became the latest version.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

versionavailabletodate

The date this version of the feature was superseded by an update or ceased to exist.

• Data Types: DateTime (GPKG), DateTime (CSV)

• Nullable: true

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

changetype

The type of change that generated a new version of the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

geometry

Geometry for the feature.

• Data Types: Geometry (GPKG), WKT (CSV)

• Nullable: false

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

• Geometry Type: MultiPolygon

geometry_area

The measured area of the geometry in square metres.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 18

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

theme

The OS NGD theme to which this feature belongs.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 40

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

description

A single descriptive value intended for a quick understanding of what the feature represents.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_text

Name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name1_language

The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

name2_text

The alternative language name assigned to identify the feature.

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 254

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

name2_language

The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').

• Data Types: String (GPKG), String (CSV)

• Nullable: true

• Max Length: 3

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

boundarytype

A single description value for boundary type.

• Data Types: String (GPKG), String (CSV)

• Nullable: false

• Max Length: 50

• OS Select+Build Filterable: Yes

• Data Schema Version: 1.0

landareahectares

The inland area of the feature in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

tidalareahectares

The non-inland area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

totalareahectares

The total area in hectares.

• Data Types: Float (GPKG), Real (CSV)

• Nullable: false

• Precision: 15

• Scale: 6

• OS Select+Build Filterable: No

• Data Schema Version: 1.0

The OS NGD Boundaries Collection provides a definitive dataset of administrative and electoral boundaries and their names for England, Wales and Scotland. Government Statistical Service (GSS) codes are contained within the data and supplied by the Office for National Statistics (ONS) and the National Records of Scotland (NRS).

Collection applications

The OS NGD Boundaries Collection allows you to:

• Access a seamless coverage of administrative and electoral boundaries across Great Britain.

• Utilise the key boundaries for Great Britain, which have been designed to be used in multiple applications including GIS and web mapping applications.

• View and interrogate the full hierarchy of boundaries across Great Britain, from 'Parish Or Community' to 'Country'.

• Use GSS codes (where available) to link OS NGD Boundaries Collection polygons with other geographies, helping you perform detailed statistical analysis to better support your decision and policy making.

• Identify areas of sea water and land present within coastal boundary polygons to get a better understanding of the land areas of a boundary.

• Perform powerful analytics, underpinned by unrivalled OS accuracy, using additional enriched attribution (detailed below).

Key elements

• The data is updated twice a year in May and October.

• Plug and play – the data is simple and quick to implement as you don't need to pre-process it before you use it.

• Persistent unique identifiers with lifecycle information.

• New Country Feature Type included, giving polygons for England, Wales and Scotland.

• New Upper and Lower Tier Local Authority Feature Types included, which improve alignment between OS data and ONS data.

• Rich attribution ensures the data is straightforward to navigate and query. The enriched, additional attribution includes, but is not limited to, the following:

  • Boundary Parent reference values (where appropriate) to indicate the hierarchy of boundaries (for example, a District Ward will reference the District).

  • Land area, tidal area and total area values in hectares.

  • An isBorough attribute to identify boundaries which are also boroughs.

  • isDetached values are applied to portions of local government and parliamentary constituency areas that are separated from the main area and are completely surrounded by other areas.

Coverage

Great Britain.

Default coordinate reference system

British National Grid (EPSG: 27700).

Temporal filtering

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.

Supply formats

GeoPackage, CSV (comma-separated values) or vector tiles.

Supply mechanism

Accessed through the OS Data Hub via:

• OS Select+Build

• OS NGD API – Tiles

It can't be accessed through OS NGD API – Features.

Using our data

Included as part of OS OpenData and therefore can be used for free.

Introduction to the theme

The OS NGD Administrative and Statistical Units Theme provides a definitive dataset of administrative and electoral boundaries and their names for England, Wales and Scotland. Government Statistical Service (GSS) codes are contained within the data and are supplied by the Office for National Statistics (ONS) and the National Records of Scotland (NRS).

In comparison to existing OS data, the new OS NGD data for this theme has been enriched with additional attribution, including the following:

• A Description attribute to provide a one-word or simple description of each feature.

• Alternative name and language values (where appropriate).

• Land area, tidal area and total area values in hectares.

• isDetached values (where appropriate), which are applied to portions of local government and parliamentary constituency areas that are separated from the main area and are completely surrounded by other areas.

• isCommon to Parishes values (where appropriate) to indicate where an area is common to more than one parish.

• An isBorough attribute to identify boundaries which are also boroughs.

• Boundary Parent reference values (where appropriate) to indicate the hierarchy of boundaries (for example, a district ward will reference the district).

Data structure

The OS NGD Administrative and Statistical Units Theme is made up of the OS NGD Boundaries Collection, which in turn is comprised of 17 feature types.

Unique identifiers

At least one of the following three unique identifiers is provided with each feature within the OS NGD Administrative and Statistical Units 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.

• GSS (Government Statistical Service) codes: A system of referencing for administrative, electoral, and statistical geographies.