Special Designations are statutory and advisory designations that can be applied to protect a highway when street or road works are to be undertaken. A Special Designation feature will reference back to the Roads product through network reference and will reference a Street feature. Features which are a partial reference will provide a network reference location.
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.
Any data temporally filtered earlier than the specified earliest date noted above for the data schema version may contain data inconsistencies.
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:
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 17
OS NGD API – Features Filterable:
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:
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:
The date this version of the feature was superseded by an update or ceased to exist.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:
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:
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:
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:
Geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable:
The OS NGD theme to which this feature belongs.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name:
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:
Type of special designation.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name:
Additional information describing the special designation.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable:
Time period to which the restriction applies.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable:
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:
The identifier of the Highway or Road Authority to be contacted for further consultation about the special designation.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 4
OS NGD API – Features Filterable:
The name of the Highway or Road Authority to be contacted for further consultation about the special designation.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 100
OS NGD API – Features Filterable:
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:
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:
The OS identifier of the date time qualifier feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable:
The identifier for the Special Designation feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable:
The version date of the Special Designation feature.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable:
The named month or period this time interval applies to.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name:
The date at which the restriction applied starts. This date will be in the format YYYY-MM-DD.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable:
The date at which the restriction applied ends. This date will be in the format YYYY-MM-DD.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable:
The date at which the restriction applied starts. This date will be in the format -MM-DD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 6
OS NGD API – Features Filterable:
The date at which the restriction applied ends. This date will be in the format MM-DD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 6
OS NGD API – Features Filterable:
These are named time periods that do not relate to the same time each day.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name:
The time the restriction begins.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 8
OS NGD API – Features Filterable:
The time the restriction ends.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 8
OS NGD API – Features Filterable:
A specified period in which the restriction applies.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name:
The named day this restriction applies to.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name:
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS Select+Build Filterable: No
Data Schema Version: 1.0
Data Schema Version: 1.0
Data Schema Version: 1.0
Data Schema Version: 1.0
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Data Schema Version: 1.0
Data Schema Version: 1.0
Data Schema Version: 1.0
Geometry Type: MultiPoint
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
Data Schema Version: 1.0
Data Schema Version: 1.0
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS Select+Build Filterable: No
Data Schema Version: 1.0
Data Schema Version: 1.0
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Data Schema Version: 1.0
Data Schema Version: 1.0
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Comma-separated values (CSV) file format is universally supported for easy ingestion into all major database products. Before loading OS NGD data contained in CSV files into a database, it is necessary to create relevant tables. Data definition language (DDL) statements for PostgreSQL, SQL Server and Oracle can be accessed in our OS NGD Resources GitHub repository.
For instructions on loading CSV files, see the Getting Started with CSV guide.