Community Research and Development Information Service - CORDIS


Geographic databases dedicated to car navigation and traffic information applications used to be static. It has been shown that when certain attributes are attached to the road elements they vary greatly according to time. An example of this is the density of traffic flow on road elements belonging to urban areas which sometimes continuously vary all day, and whose daily evolution depends on the day of the week. The geometry of the road network and any database relationship may also be affected by time dependency. This document reports on the improvements to the later version (2.1) of the GDF specifications. It points out how time has been introduced into the attributes' definition, and suggests ways to continue the work and extend the concept to the whole data model definition.

Additional information

Authors: BERTHET P,
Bibliographic Reference: Report: V2052/315 EN (1993) 39 pp., ECU 5
Availability: Available from European Commission, c/o ECOTEC Research and Consulting Ltd., 28-34 Albert Street, Birmingham B4 7UD (GB)
Record Number: 199430125 / Last updated on: 1995-10-18
Original language: en
Available languages: en