基于XML三层B/S结构的WebGIS构建

网络地理信息系统(WebGIS)的出现,拓展了原有GIS的应用领域和功能,Internet作为WebGIS地理信息发布的平台,使GIS逐渐面向公众。近年来,有关地理信息系统异构数据库的互操作要求逐渐增多,因此引起人们的关注。XML良好的开放性和能够描述数据的功能为异构数据的互操作提供了有效的转换标准,B/S三层结构的建立能够为网络异质信息的传输提供有效的解决方案,因此,将二者结合应用于WebGIS具有良好的发展前景。本文首先简要介绍了WebGIS的独特优势以及XML和B/S三层结构的主要特点,然后对基于XML三层B/S结构的WebGIS构建在理论上进行了初步探讨。

The Construction of WebGIS based on Three-Layer B/S and XML

WebGIS developd the funtion and enlarge the field in traditional GIS, as the desk for information distribution, open Internet makes GIS more public.With the development in application, the demand for using data in different GIS databases became critical, so more and more efforts will be devoted to the research in this fields.With open and self-describing ability, XML rises an effective standard; on the other hand,the three-layer B/S gives a good model for data using in different structures.So there must be a good future in using of WebGIS.This paper firstly briefs introduce for WebGIS, XML and the three-layer B/S structure and then gives a rudimentary research in the combination of these.