摘要
设计了一个基于PDA的、移动的公交信息数据库并描述了四种面向不同需要的公交信息查询方式及相应的算法。除了提供三种传统的公交查询方式外,还系统提供了以设备持有者为当前所处位置为中心的、公交线路信息的查询。
In this paper, a bus-route information system based on PDA is designed. Four query methods in allusion to different people and their algorithms are described. In addition to traditional query function of bus-route information, the system provide a query method which is based on users who own PDA.
出处
《现代测绘》
2004年第3期45-48,共4页
Modern Surveying and Mapping
关键词
PDA
移动数据库
查询算法
GPS
定位
PDA, Mobile database, Query algorithm, GPS, Location Based Service