摘要
提出基于移动设备的地图查询算法,定义了EGSQL查询语言,给出了EGSQL查询实现的标准流程.以公交路线查询为例说明了整个查询流程的实现.实际应用表明该体系具有良好的通用性和较高的查询效率.
This paper presents a map query algorithm and defines a query language based on mobile equipment, termed the embed geography SQL (EGSQL). The standard flow of EGSQL is explained with an implementation in an application of bus query used in the system of Southeast University Swift DB, providing an indication of its effectiveness and potential for general uses.
出处
《应用科学学报》
CAS
CSCD
北大核心
2005年第5期502-505,共4页
Journal of Applied Sciences
关键词
移动设备
区域划分
查询
EGSQL
mobile equipment
block division
query
embed geography struetual query language