摘要
对当前WebGIS主流实现技术进行了分析,构建基于Applet/Servlet和混合计算模式的WebGIS信息发布平台。此方案采用远程对象预获取策略,通过RMI在代理服务器端完成对象方法的调用或通信。平台客户端表示层由JavaApplet显示控制,应用逻辑功能模块通过Servlet、EJB在服务器端完成。由此实现代理服务器和客户端负载平衡,提高系统响应速度,解决了在分布式环境下客户端图形、图像信息发布所遇到的空间数据量大、网络传输慢的瓶颈问题。
The paper analysis mainstream technology of Web GIS and introduces the information publishing platform that is developed with the Applet/Servlet technology, mixed computing pattern. The method adopts prefetching strategy of remote objects and utilizes RMI to transfer or communicate remote objects in Server side. The platform Client display and control by Java Applet. The logic functional module of application is completed by Server side. The balance between Server＇s and Client＇s load comes true by this way. The response velocity for system is improved. The bottleneck problem of the large spatial data and the slow transmission on web met the issue of the Client＇s graphics and image information on distributing environment is solved.
出处
《地理空间信息》
2006年第4期40-42,共3页
Geospatial Information
基金
农业部草业监测信息系统专项经费资助。
