| Studied the GPS, DGPS and 015 deeply, this paper presents a system technical scheme which aimed at the precise position and trace management, it has based on the reality of city and water traffic manager. The key technology in this system includes navigation position technology (DGPS) and geography information systems (GIS). In this paper, it has detail discussed the working principle of DGPS, the mode of position, the mode of communication, the cause of system error and key arithmetic of data process, present the correlative arithmetic and program source code. Then, by means of the test of UHF data link and error analysis, validate the feasibility, high effect and practicability of this system. Finally, by applied in the different environmental, the paper present a general and feasibility multi-objects manager system software and hardware scheme, in the mean while, give a big capability, long distance and network multi objects manager system frame built on GSM and DGPS web. |