Geographic information forms a major part of the information that is communicated in
applications in the field of traffic (and traveler) telematics. The geographic information
component is needed to answer questions like: Where am I? Where are you? Where is
the accident?. The form of the answer depends on the spatial reference system used.
Generally speaking answers to the question "Where"? may range from positions
expressed exclusively in terms of scientific co-ordinates to positions expressed in
terms of objects of direct human experience. The latter are called locations in traffic
telematics terminology. A location may e.g. be a crossing of roads, a section of a road,
a relation between road sections, a point of interest. Consequently digital map
databases play a vital role in most traffic telematics applications. In the chain of
creating, providing and using traffic and related information, a traffic message is
created in the sending system, transmitted and used in the receiving system. The traffic
information in the message is related to a location. In the message this location is
referenced by a code, called in the specific terminology a location reference. A problem
is caused by the fact that the sending and the receiving system may, and often will use,
map databases of different origin, specification, and completeness.
A new generic method for location referencing was successfully implemented, tested
and validated in a laboratory type map database environment (TR4011-EVIDENCE).
The method is designed for traffic telematics systems that use a digital map on both
ends of the communication chain. A location code is created when needed from the
map database in the sending system, embedded in a message, sent on wireless data
carriers, and interpreted by the receiver using the information in its map database.
Pre-coding of locations, maintenance, and dissemination of location tables are no
The AGORA project key objectives are:
Adapt and implement this leading edge technology, to bring it from the laboratory
environment to real telematics applications;
Test & validate the reliability of this method on a trial site in Hanover,
Disseminate & transfer this technology for wide-spread adoption/implementation.