摘要
总结了WebGIS的主要实现方式以及WebGIS中同步数据传输的主要问题;对Ajax技术的特点和应用情况进行了描述,重点阐述了Ajax的异步性及其应用特点;针对WebGIS中服务器和浏览器间频繁的地图数据交互而引起的响应速度慢的问题,提出利用Ajax来实现WebGIS中海量数据的无刷新的异步交互,给出了具体实现的方法和应用实例;最后得出结论:利用Ajax的异步数据交互技术可以改善WebGIS数据传输的性能,给WebGIS用户更好的交互体验,对推广WebGIS的应用具有一定的现实意义。
This study summarized WebGIS＇s main implementation method and its major problem in synchronous data transfer. It described the feature and application of Ajax technology, and especially expatiated on the asynchronous feature of Ajax and its application. Aimed at the problem of slow response caused by frequent map data interaction between WebGIS severs and the browser, it provide a way to using Ajax to realize zero refreshing during data interaction and provide a application. Finally, it demonstrated that using Ajax＇s asynchronous feature could improve the performance of WebGIS＇s data transfer, could provide user with better interaction and significantly extent WebGIS ＇s application.
出处
《计算机测量与控制》
CSCD
2007年第5期698-700,共3页
Computer Measurement &Control
基金
浙江省教育厅计划资助项目(20051434)
