Evaluation of a Blended DGPS/DR System for Precision Map Refinement

Jin Wang, Seth Rogers, Christopher Wilson and Stefan Schroedl

Abstract:	With the advances of modern technology in electronics, communication and system integration, an inexpensive DGPS/gyro/odometer dead-reckoning system will soon be practical in a car to continuously provide adequate positions. A variety of communication links can be established and utilized to transmit these position data to a processing center, where lane model of the road with decimeter accuracy can be dynamically refined as multiple traces are collected for each lane. This mapping technique is dynamic and reliable enough for land vehicle safety applications. This paper evaluates the ability of such an integrated DGPS dead reckoning system for mapping lane network. Specifically, the ability to bound error growth during short-term GPS outage and the accuracy of the refined lane centerline as compared to the kinematic solution and the curvature derived from vision system, are investigated. The positioning algorithms and the map refinement procedures are discussed. The results are given which verify the feasibility of precision map refinement using this positioning system.
Published in:	Proceedings of the 2001 National Technical Meeting of The Institute of Navigation January 22 - 24, 2001 Westin Long Beach Hotel Long Beach, CA
Pages:	672 - 678
Cite this article:	Wang, Jin, Rogers, Seth, Wilson, Christopher, Schroedl, Stefan, "Evaluation of a Blended DGPS/DR System for Precision Map Refinement," Proceedings of the 2001 National Technical Meeting of The Institute of Navigation, Long Beach, CA, January 2001, pp. 672-678.
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