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OS MasterMap Integrated Transport Network (ITN) Layer
OS MasterMap® Integrated Transport Network™(ITN) Layer maps Great Britain’s road network – from motorways to pedestrian streets and alleys.
Ideal for route planning or to manage your resources, it consists of three elements: Road Network (road geometry), Road Routing Information (routing information for drivers on mandatory and banned turns and other restrictions) and Urban Paths (man-made path geometry in urban areas).
Features and benefits

- All 548,000 Km of roads in Great Britain accurately mapped in a consistent logical link and node network.
- 970,000 road routing information features.
- Currency - all road changes are captured within 6 months.
- The Urban Paths theme complements ITN’s road information by adding path networks in urban areas.
- Designed to relate to other OS MasterMap layers.
Suggested uses

- Asset management
- Civil contingency
- Emergency services
- Route planning
- Transport planning
Technical details
Format: GML 2.1.2 (shipped in compressed .gz format).
Type of roads: Motorway, A road, B road, minor road, local street, alleyway, private roads - publicly accessible, private road - restricted access, pedestrianised streets.
Road Routing Information: Access restrictions; Bridge Over Road; Firing Range; Ford; Gate; Level Crossing; Mandatory and Banned Turns; One Way; Physical Weight and Width Restrictions; Rising Bollards; Severe Turn; Steep and Very Steep Gradients; Through Route; Toll Indicator and Traffic Calming.
Urban Paths: Man-made paths in urban areas of Great Britain larger than 5 Km2.
Update frequency: Six weekly (full re-supply, change-only updates or managed GB set). Urban Paths Theme is updated quarterly.
Supply: CD-ROM, DVD or FTP (below 400 Mb).
Coverage: Great Britain.
Useful links
Technical reference
NEW Styled Layer Descriptor files
Life cycle rules for ITN features
Working with ITN
Relating ITN data to other OS MasterMap layers and third-party data
Working with ITN Road Routing Information (RRI) and Path Routing Information (PRI)
Routing with ITN data
Use of the National Street Gazetteer with Ordnance Survey data
Other



