GPS定位技术在个人数字助理上实现技术的研究

GPS全球定位系统是全球性的卫星导航定位系统,可以提供实时的经纬度位置和时间等信息。本文叙述了利用GPS定位信息在个人数字助理上实现显示持有此个人数字助理人位置的技术。首先介绍了实现定位功能的个人数字助理的硬件配置和利用GPS接收板接收定位信息的方法;然后详细介绍了实现嵌入式地理信息系统用到的地理数据的组织,显示模块的设计和电子地图的分块处理;最后介绍了采用直线优化Dijkstra算法实现最短路径搜索。

Study and Implementation of GPS on PDA

GPS positioning system is a global system of navigation, which provides real - time information of time and position of longitude and latitude. This paper has proposed some technologies about how to display the location of the PDA holder on the PDA screen. It described the hardware of the PDA and how to receive the positional information from CPS receiver, and also described the technologies used in the system, such as the organization of the geographical data, the design of the display mode and the partition of the electronic map. The realization of the shortest path is the linear - optimized Dijkstra' s algorithm.