Maintenance Area
A feature which has a polygon geometry and provides information about whether the road is maintained at public expense by a national or local highway authority, a road authority or is maintained by another responsible organisation (i.e. not maintained at public expense). If a path is prospectively maintainable at public expense, then this is not currently maintained by a road or highway authority, but the responsible organisation has started the process for a highway or road authority to become responsible for the maintenance of the street at public expense.
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
authorityid
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 17
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The date this version of the feature was superseded by an update or ceased to exist.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: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
effectivestartdate
The date on which this record was inserted into the Local Authority 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: 1.0
effectiveenddate
The date on which the record ceased to exist
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
geometry
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: MultiPolygon
geometry_area
The measured area of the geometry in square 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: associatedstreetdatadescriptionvalue
Max Length: 20
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
maintenanceresponsibility
Indication of whether the Street is maintainable at public expense.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: maintenancevalue
Max Length: 60
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
maintenanceauthority_identifier
Identification code used to identify the Highways Authority.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 4
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
maintenanceauthority_authorityname
The authority responsible for maintenance.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 100
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
highwayauthority_identifier
Identification code used to identify the Highway or Road Authority.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 4
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
highwayauthority_authorityname
The Highway or Road Authority responsible for the street naming and numbering or maintenance.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 100
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
locationdescription
Textual description of the location extent of the referenced property when the feature partially references the network.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 250
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
partialreference
Flag to indicate that the maintenance feature partially references a Street.
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
usrn
The Unique Street Reference Number (USRN) of the referenced Street.
Data Types: Integer (GeoJSON), Integer (GPKG), Integer (CSV)
Nullable: false
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
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