ABSTRACT
ABSTRACT: The development of road telematics requires themanagement of continuously growing road databases. Mobilemapping systems can acquire this information, while offering an unbeatable productivity with the combination of navigation and videogrammetry tools. However, such technically advanced devices only go together with significant investments in staff and hardware. The Geodetic Engineering laboratory of the Swiss Federal Institute ofTechnology in Lausanne continues developing a user-friendly and low-cost process of extraction of road data. The system allows a subdecimetre restitution of the road centreline, after a B-spline interpolation. New investigations involve the use of national-wide real time kinematic (RTK) positioning service via cellular communications, and the use of a nearly horizontal camera for the monoscopic survey of road signs. The first results are satisfactory, reaching an accuracy of 20-40 cm with respect to the road centreline in most conditions.
