摘要
1前言
基于Web的系统,有两个关键环节直接影响着数据的存取效率,即网络的传输效率和数据库的存取效率,Web地理信息系统(WebGIS)也不例外.在WebGIS系统中,由于空间数据访问的局部性和位置相关性,鉴于性能考虑,使得构建在Web之上的GIS系统必须引入缓存技术.缓存技术已成为WebGIS实现中的研究重点之一[1,2,6].
Analyze the access efficiency key factor of WebGIS. according to the locality and site- correlation, and by different access of client-side and server-side, combing mechanism of edition-control, advanced cache strategy and implementation mechanism of based client-side and server-side separately, and describe the detail of implementation based edition information . It can improve the efficiency of WebGIS greatly with this cache technology based on edition information.
出处
《计算机科学》
CSCD
北大核心
2003年第12期89-91,共3页
Computer Science
