The Integrated Transport Network (ITN) is a dataset containing details of
Great Britain
Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is ...
's transport network. Produced by
Ordnance Survey
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– the national mapping agency of Great Britain – it forms part of the OS MasterMap suite of products.
Intended to facilitate route planning and resource management, the dataset consists of three elements: Road Network (road geometry), Road Routing Information (routing information for drivers concerning mandatory and banned turns and other restrictions) and Urban Paths (man-made path geometry in urban areas).
The network is a
link-and-node based network containing such details about each link as:
*the
class of road (A-road, B-road, etc.);
*the nature of the road (single carriageway, dual carriageway,
roundabout
A roundabout is a type of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junction.''The New Shorter Oxford En ...
, etc.);
*road names;
*road routing information (RRI) (e.g. prohibited turns, one-way streets).
These data are supplied in
Geography Markup Language
The Geography Markup Language (GML) is the XML grammar defined by the Open Geospatial Consortium (OGC) to express geographical features. GML serves as a modeling language for geographic systems as well as an open interchange format for geographic ...
file format.
Features
The main benefits claimed for this product are that
*it accurately maps all 545,000 km of roads in Great Britain in a consistent logical link-and-node network;
*it contains 1.7 million road routing and information features;
*all road changes are captured within six months of their implementation;
*the Urban Paths Theme complements ITN's road information by adding path networks in all urban areas;
*it is designed to relate to other OS MasterMap layers.
ITN is used as the roads network by
Transport Direct Portal
The Transport Direct Portal was a distributed Internet-based multi-modal journey planner providing information for travel in England, Wales and Scotland. It was managed by Transport Direct, a division of the Department for Transport. It was lau ...
for its car and
cycle journey planning; is referenced in the
CycleNetXChange schema; and forms a key element in the U
Digital National Framework(DNF).
Future developments
From 31 March 2019 the Integrated Transport Network product will be withdrawn. It is in the process of being replaced by the
OS MasterMap Highways Network, launched on 31 October 2016.
Ordnance Survey: Why is ITN migrating to Highways?
/ref>
References
External links
DNF
Transport Direct Portal
Transport in the United Kingdom
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