这是基于mapx对道路拓扑分析和路径最短分析的详细论文，非常有价值。-This is based on the right road MapX topological analysis and the shortest path of the detailed papers, very valuable.

接收通过RS232通信接口传递回来的GPS信号值，并将此信号值保存在固定路径的文件当中，以供研究及分析。-To pass through the RS232 communication interface to receive back the value of GPS signals, and the signal value is stored in a fixed path of the file ，which is used for research and analysis.