Research And Development Of Car Gps Road Measurement And Correction System

With the development of the society economy, the automobile is more and more necessary vehicle in people's life, which results in the increasingly serious traffic jam and the environment problem. The electronic map is the important constitute part of the intelligence transportation system, which emerge with the tide of the times, and also show its outstanding important position more and more. But the timeliness of the existing electronic map is bad, the road information in the electronic map isn't complete and the updating speed is slow, which restrict the development of the intelligence transportation system. To resolve this problem, have to update the existing electronics map, revise and add the road information. Therefore develop a kind method of the fast and efficiently navigate numerical map is vary important. Vehicle-mounted GPS is a kind of low cost and high-efficiency means to obtain data, and it can be good to resolve this problem.The system by designed in this paper can record the spacial attribute information and the non-spacial attribute information of road, and carry on difference processing with the road coordinate data on the real-time. The result will be showed and saved in the computer fixed in the basal station. After the further data processing, the data is output to the GIS system, in order to update the electronics map.In this paper, the author discusses the establishment of the path database, GPS data processing and the system reality chiefly. The central work including survey path coordinates using Vehicle-mounted GPS, processing dynamic data with the auto-adapted Kalman filter algorithm and increasing the path measuring accuracy. According to the features of road vector data and the application aim of this system, the author designs the path database. At the same time, study the data processing methods including gross error rejection, coordinate conversion, data match, partiality correct, and so on. In the end, realize all the function of this system from software and hardware aspects. The system has important significance to promote the development of domestic car navigation systems and the development of ITS.