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Structure
Last updated
Last updated
The Road Network is a topologically structured link and node network made up of the following feature types:
| Feature type | Description |
|---|---|
RoadLink | A line segment representing the general alignment of the carriageway of the road. |
RoadNode | A point connecting to at least one RoadLink, providing network connectivity. |
Road | A Road defines the complete collection of references to RoadLink features defining the network topology which share the same road name and/or road classification number. For example, the A38 or Romsey Road. |
Street | A Street feature is the definition of the street as defined in the National or Scottish Street Gazetteer, made up of aggregated geometry with a unique identifier (USRN). |
RoadJunction | A collection of RoadNodes that make up a named or numbered road junction. |
FerryLink | A feature which represents a ferry route between two FerryNodes. |
FerryNode | A feature representing the point at which a vehicle ferry route or section of ferry route starts or ends. |
FerryTerminal | A feature representing the point at which vehicle transfers from the ferry network to the road network or vice versa. |
OS MasterMap Highways Network has been built with the INSPIRE Transport Networks Data Specification as a basis. This has been extended to include the additional properties required by BS 7666-1:2006, defined within the NSG to ensure that conformance to both INSPIRE and BS7666-1:2006 can be achieved.
Each feature within the OS MasterMap Highways Network will have the following common attribution:
gml:id, gml:identifier and inspireId
beginLifespanVersion
inNetwork – this shall always be set to “OSHighwayNetwork”
reasonForChange
validFrom
This is assigned a nilReason value “unknown” for most features.
In addition, many of the attributes which have been inherited from the INSPIRE Transport Network model have a stereotype of ‘voidable’, for example “beginLifespanVersion”. Where these attributes have not been populated there is a requirement to give a reason for this. This will be specified in the GML through an attribute called “nilReason”.
