Abstract
A precise positioning technology was introduced in this paper and A precise positioning system has been built. The DGPS technology was introduced to acquire accurate data of the roads and traffic facilities in the system and a data-base has been built. The data-base was applied to GIS platform and a centimeter-level accurate road model was established. In addition, DGPS technology was adopted to achieve centimeter-level position. The position data coupling with accurate road model and the locating point would be indicated instantaneously. The distance between the locating point and the road boundaries, traffic signs lines, traffic lights, etc. could be indicated in the map and also the speed, acceleration, etc. of the locating point. This study provided positioning and navigation technology for the automatic driving technology of the intelligent vehicle.
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