- Home
-
Public Sector
Public Sector
Quick links to popular content
- Business
-
Leisure
Leisure
OS getamap – print your route
Have your map custom made
Visit our shop
Read our magazine
-
Education & Research
Education & Research
Schools
Further & Higher Education
Research
General interest
-
About us
About us
Quick links
- Support
Feature types and attribution in the Road Network theme
Go to: Road | RoadLink | RoadNode | FerryLink | FerryNode | FerryTerminal | InformationPoint
In OS MasterMap® Integrated Transport Network™ Layer (ITN), features are classified using feature type and feature description attributes. This section describes the feature types in the Road Network theme, illustrates their permitted attribution and shows the expected occurrence of the attributes for each feature type in the data. These occurrences are shown in UML notation; 0 for optional, 1 for a single, * for multiple, and ‘or’ being represented by double dots (..).
Road
A Road is a compound feature that represents a road with a name or number. This may be a Department for Transport (DfT) classified road, such as the A38, or a named road, such as ‘Romsey Road’. The feature consists of a set of references to RoadLink features that provide the network topology of the road. A classified road references all of the RoadLink features that represent it. The links may not be contiguous either across junctions or where a classified road consists of separate sections, which may be separated by some considerable distance.
Classified roads that have sections that are trunk roads or primary routes have these portions identified as separate Road features; these reference only the elements that make up the trunk road or primary route. Named roads reference all of the RoadLink features that represent the same contiguous named road, where RoadLink features may be separated by a given threshold. On occasion, RoadLink features separated in excess of this tolerance may result in two Road features being created. Unnamed and unnumbered roads are included as RoadLink features, but are not referenced by a Road feature.
|
Feature type: Road |
||||
|
Attribute |
Cardinality |
Type |
Mandatory |
Notes |
|
TOID |
1 |
Identifier |
Yes |
|
|
version |
1 |
Integer |
Yes |
|
|
versionDate |
1 |
Date |
Yes |
|
|
changeHistory |
* |
Complex |
No |
|
|
descriptiveGroup |
1 |
Fixed String |
Yes |
‘Road Topology’ |
|
descriptiveTerm |
0..1 |
Controlled String |
Yes |
|
|
roadName |
1 |
String |
No |
|
|
networkMember |
1..* |
Identifier of RoadLink |
Yes |
List of TOIDs relating to the link network |
|
boundedBy |
1 |
Rectangle |
Yes |
|
|
theme |
1 |
Fixed String |
Yes |
‘Road Network’ |
RoadLink
A RoadLink is a road network line representing the general alignment of the road carriageway where the only option for a vehicle is to travel along the link or leave the road network, for example onto a petrol station forecourt or onto private land.
|
Feature type: RoadLink |
||||
|
Attribute |
Cardinality |
Type |
Mandatory |
Notes |
|
TOID |
1 |
Identifier |
Yes |
|
|
version |
1 |
Integer |
Yes |
|
|
versionDate |
1 |
Date |
Yes |
|
|
changeHistory |
* |
Complex |
No |
|
|
descriptiveGroup |
1 |
Fixed String |
Yes |
‘Road Topology’ |
|
descriptiveTerm |
1 |
Controlled String |
Yes |
|
|
natureOfRoad |
1 |
Controlled String |
Yes |
Defines the type of road that a RoadLink Represents such as a single or dual carriageway |
|
length |
1 |
Real |
Yes |
|
|
polyline |
1 |
LineString |
Yes |
|
|
directedNode |
2 |
Identifier of node |
Yes |
Has a reference to the RoadNode at the start and end of this feature. |
|
referenceToTopographicArea |
1..* |
TOID |
Yes |
Reference to the topographic area feature the RoadLink sits on. This is a place holder for future population. Currently set to default value of 'osgb9999’. |
|
theme |
1 |
Fixed String |
Yes |
‘Road Network’ |
RoadNode
A RoadNode is a point connected to at least one RoadLink. A RoadNode represents any one of the following options:
- The intersection or crossing of carriageways
- The point where a road name or number changes
- The point where a road name or number ceases to apply
- The point where a one-way restriction ceases to apply
- The start or end of a carriageway
|
Feature type: RoadNode |
||||
|
Attribute |
Cardinality |
Type |
Mandatory |
Notes |
|
TOID |
1 |
Identifier |
Yes |
|
|
version |
1 |
Integer |
Yes |
|
|
versionDate |
1 |
Date |
Yes |
|
|
changeHistory |
* |
Complex |
No |
|
|
descriptiveGroup |
1 |
Fixed String |
Yes |
‘Road Topology’ |
|
point |
1 |
Point (coordinates) |
Yes |
If relevant and available, the location or the end point of the section (coincident with the vertex on the RoadLink). |
|
referenceToTopographicArea |
1 |
TOID |
Yes |
Reference to the topographic area that the RoadLink sits on. This is a place holder for future population. Currently set to default value of 'osgb9999’. |
|
theme |
1 |
Fixed String |
Yes |
‘Road Network’ |
FerryLink
A FerryLink is a network link representing a vehicular ferry route between two ferry terminals.
|
Feature type: FerryLink |
||||
|
Attribute |
Cardinality |
Type |
Mandatory |
Notes |
|
TOID |
1 |
Identifier |
Yes |
|
|
version |
1 |
Integer |
Yes |
|
|
versionDate |
1 |
Date |
Yes |
|
|
changeHistory |
* |
Complex |
No |
|
|
descriptiveGroup |
1 |
Fixed String |
Yes |
‘Road Topology’ |
|
directedNode |
2 |
Identifier of node |
Yes |
Has a reference to the RoadNode at the start and end of this feature. |
|
theme |
1 |
Fixed String |
Yes |
‘Road Network’ |
FerryNode
A FerryNode is a feature representing the terminal of a vehicular ferry route or section of ferry route. A FerryNode must connect with at least one FerryLink.
|
Feature type: FerryNode |
||||
|
Attribute |
Cardinality |
Type |
Mandatory |
Notes |
|
TOID |
1 |
Identifier |
Yes |
|
|
version |
1 |
Integer |
Yes |
|
|
versionDate |
1 |
Date |
Yes |
|
|
changeHistory |
* |
Complex |
No |
|
|
descriptiveGroup |
1 |
Fixed String |
Yes |
‘Road Topology’ |
|
point |
1 |
Point (coordinates) |
Yes |
If relevant and available, the location or the end point of the section (coincident with the vertex on the RoadLink). |
|
theme |
1 |
Fixed String |
Yes |
‘Road Network’ |
FerryTerminal
A feature used to represent the connectivity between a Road and a FerryLink.
|
Feature type: FerryTerminal |
||||
|
Attribute |
Cardinality |
Type |
Mandatory |
Notes |
|
TOID |
1 |
Identifier |
Yes |
|
|
version |
1 |
Integer |
Yes |
|
|
versionDate |
1 |
Date |
Yes |
|
|
changeHistory |
* |
Complex |
No |
|
|
descriptiveGroup |
1 |
Fixed String |
Yes |
‘Road Topology’ |
|
descriptiveTerm |
2 |
Controlled String |
Yes |
|
|
theme |
1 |
Fixed String |
Yes |
‘Road Network’ |
|
Association |
Cardinality |
Type |
Mandatory |
Notes |
|
referenceToNetwork |
2..* |
TOID |
Yes |
References to the PathNode and FerryNode features. |
InformationPoint
InformationPoint is a point feature, not attached to the network, that represents a numbered motorway junction.
|
Feature type: InformationPoint |
||||
|
Attribute |
Cardinality |
Type |
Mandatory |
Notes |
|
TOID |
1 |
Identifier |
Yes |
|
|
version |
1 |
Integer |
Yes |
|
|
versionDate |
1 |
Date |
Yes |
|
|
changeHistory |
* |
Complex |
No |
|
|
descriptiveGroup |
1 |
Fixed String |
Yes |
‘Road Topology’ |
|
point |
1 |
Point (coordinates) |
Yes |
If relevant and available, the location or the end point of the section (coincident with the vertex on the RoadLink). |
|
junctionName |
1 |
String |
No |
The ‘local’ name of the path (where Ordnance Survey has names in more than one language, such as Welsh or Gaelic) |
|
theme |
1 |
Fixed String |
Yes |
‘Road Network’ |
In this section:
ITN Technical specification – home
ITN Road Routing Information (RRI) theme
ITN Path Routing Information (PRI) theme
Feature types and attribution in the Road Network theme
Feature types and attribution in the Road Routing Information theme
Feature types and attribution in the Urban Paths Network theme
Feature types and attribution in the Path Routing Information theme
Descriptions of ITN Layer attributes
Attribution checklists for the Road Network and Urban Paths Network themes
ITN attribute definitions and values
This web page is part of the technical specification for OS MasterMap® Integrated Transport Network™ Layer. For the terms that apply to use of this specification, refer to Purpose of this specification.