整合Ajax的GIS Web服务的研究  

Research on Integrating Ajax into GIS Web Services

作　　者：韩向春[1] 郝立宇[1] 

机构地区：[1]燕山大学信息科学与工程学院,秦皇岛066004

出　　处：《计算机与数字工程》2008年第12期59-62,共4页Computer & Digital Engineering

摘　　要：通过引入Web服务,不同供应商所提供的GIS Web服务使用互操作标准SOAP(Simple Object Access Proto-col)可以动态地集成到一个Web GIS应用中。然而由于浏览器功能有限,它不能有效地解决地图加载速度慢,显示不连贯等问题。Ajax(Asynchronous JavaScript and XML)技术提供了客户端和服务器之间的异步通信模式,通过Ajax异步调用GIS Web服务的方式,在无需增加网络带宽和任何浏览器插件的情况下可以降低浏览器和服务器之间的通信量,加快了地图的加载速度,使地理信息系统的可视化性能显著提高。By introducing Web Services, distributed GIS （Geospatial Information System） services from different vendors can be dynamically integrated into a GIS application using the interoperable standard SOAP（Simple Object Access Protocol）. However, it can not effectively solve some crucial problems of slow map loading and intermittent showing on Web because of the limited functions of browser. Ajax （Asynchronous JavaScript and XML） provides asynchronous communication between the client and the server. Integrating Ajax into GIS Web Services ,without extra network bandwidth and any plug - in in browser, can show maps in browsers accurately and immediately by the way of Ajax invoking GIS Web Services asynchronously. So the communication between server and browser is reduced and map loading is speeded up to improve the performance significantly of GIS visualization.

关 键 词：GIS WEB服务 AJAX 网络地理信息系统 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]