工具设计

• Two methods have been proposed and applied : setting up error model by time series analyzing , displaying vehicle tract by map matching . digital map and software for the paper have been designed by gis tool and high language , software can receive nmea sentence , process gps data and display the vehicle track on the digital map
  论文根据车辆定位系统的功能要求设计了软件系统，实现了在计算机上接收gps接收机输出，对原始gps数据进行处理和输出；采用gis开发工具设计了数字地图，设计多个图层，建立路段数据库，应用投影匹配方法将车辆位置轨迹显示在数字地图上。