Accessing OS NGD FAQ's

Path Link

A Path Link is a linear spatial object that defines the geometry and connectivity of the path network between two points in the network. Path Links will be split for connectivity purposes (for example, at junctions) and Path Nodes will connect the Path Links together. Each Path Link will provide a reference to the Path Nodes at the start and end of the Path Link.

Path Links will be captured where:

  • They provide a route that cannot be inferred from the Road Network.

  • They provide connectivity between road networks.

  • There is a canal path or tow path.

  • There are paths over footbridges and under subways.

Path Links will not be captured where:

  • They run parallel to the Road Network (for example, a pavement).

  • They are connected to a motorway.

  • There is a physical obstruction which prevents connectivity.

  • They are non-public paths, for example in a school, prison, or military area

  • They do not meet validation criteria in place to maintain network quality (for example isolated links with no connectivity to another link)

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 (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

toid

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

versiondate

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

versionavailablefromdate

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

versionavailabletodate

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

changetype

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: Yes

  • OS Select+Build Filterable: No

  • Data Schema Version: 1.0

geometry

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

geometry_length

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

theme

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

description

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: formofwaytypevalue

  • Max Length: 42

  • OS NGD API – Features Filterable: Yes

  • OS Select+Build Filterable: Yes

  • Data Schema Version: 1.0

pathname1_text

The name of the path which the feature is part of. When a path link is referenced by a Street with a street type of Designated Street Name, this is the name used; otherwise, the name is from the Path feature.

  • 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

pathname1_language

The language of pathname1, 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

pathname2_text

The name of the path which the feature is part of. When a path link is referenced by a Street with a street type of Designated Street Name, this is the name used; otherwise, the name is from the Path feature.

  • 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

pathname2_language

The language of pathname2, 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

alternatename1_text

Another name for the path that the feature is part of. This is populated with the name captured by Ordnance Survey when it differs from that in Street.

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

  • Nullable: true

  • Max Length: 254

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: Yes

  • Data Schema Version: 1.0

alternatename1_language

The language the name is expressed in, 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

alternatename2_text

Another name for the path that the feature is part of. This is populated with the name captured by Ordnance Survey when it differs from that in Street.

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

  • Nullable: true

  • Max Length: 254

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: Yes

  • Data Schema Version: 1.0

alternatename2_language

The language the name is expressed in, 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

surfacetype

Nature of the material that the path is made up of.

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

  • Nullable: true

  • Code List Name: surfacetypevalue

  • Max Length: 13

  • OS NGD API – Features Filterable: Yes

  • OS Select+Build Filterable: No

  • Data Schema Version: 1.0

cyclefacility

An indication of whether the the link has facilities for cyclists.

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

  • Nullable: true

  • Code List Name: cyclefacilityvalue

  • Max Length: 45

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: Yes

  • Data Schema Version: 1.0

cyclefacility_wholelink

An indication of whether the facilities for cyclists apply to the whole link feature.

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

  • Nullable: true

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: No

  • Data Schema Version: 1.0

elevationgain_indirection

The total ascent experienced when passing along a link feature in the direction of digitisation, calculated from three-dimensional geometry.

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

  • Nullable: false

  • Precision: 6

  • Scale: 1

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: No

  • Data Schema Version: 1.0

elevationgain_againstdirection

The total ascent experienced when passing along a link feature against the direction of digitisation, calculated from three-dimensional geometry.

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

  • Nullable: false

  • Precision: 6

  • Scale: 1

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: No

  • Data Schema Version: 1.0

heightingmethod

The origin and derivation of the three dimensional geometry of the road link.

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

  • Nullable: false

  • Code List Name: heightingmethodvalue

  • Max Length: 19

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: No

  • Data Schema Version: 1.0

capturespecification

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: 8

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: No

  • Data Schema Version: 1.0

matchstatus

Indication of whether the feature has been matched to a feature in the National or Scottish Street Gazetteers.

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

  • Nullable: false

  • Code List Name: matchstatusvalue

  • Max Length: 38

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: Yes

  • Data Schema Version: 1.0

startnode

The node coincident with the first vertex of the geometry attribute of the 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

startgradeseparation

The relative level of the link at the startNode.

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

  • Nullable: false

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: No

  • Data Schema Version: 1.0

endnode

The node coincident with the last vertex of the geometry attribute of the 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

endgradeseparation

The relative level of the link at the endNode.

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

  • Nullable: false

  • OS NGD API – Features Filterable: No

  • OS Select+Build Filterable: No

  • Data Schema Version: 1.0

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