OS MasterMap ITN Layer

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Dataset Description:

The OS MasterMap ITN (Integrated Transport Network) Layer augments the Topography Layer by providing a road network model suitable for use in navigation services.  It provides road centrelines as a series of geometrical objects (vector polylines), attributed with Road Routing Information (RRI) providing information such as prohibited turns or no entry junctions to allow vehicle routing analysis.


Please note:  From 31 March 2019 the OS MasterMap ITN Layer will be withdrawn and replaced by the new OS MasterMap Highways Network.

For more details please see the OS migration site.


Dataset Thumbnail:


Dataset Specification:

Product Name

OS MasterMap ITN Layer

Data Provider

Ordnance Survey


1:1,250 to 1:10,000


Great Britain (complete)

Data Structure

Vector (topologically structured link and node network)


Esri Shapefile, Esri File GeoDatabase, MapInfo TAB, MID/MIF, Autodesk DWG, OGC KML, OGC GML, CSV (attribute data only)


Large scale, site-level applications


Academic Licence

Update Frequency


Dataset Resources:

Support site
Getting Started Guide (pdf)
ITN Urban Paths User Guide (pdf)
User Guide & Technical Specification (pdf)