：查看GPS的卫星个数和状态。 路径分析：屏幕选取起止点、文字录入起止点、 最短路径分析、最优路径分析轨迹回放：导航轨迹播放（ ... iDD (位vb MapX程序-: View the number of GPS satellites and the state. Path Analysis : screen selected starting and ending points, text input starting and ending point, the shortest path analysis, the optimal path trajectory analysis intervals : navigation track player (... iDD (vb - MapX procedures