Abstract: A new implementation method of interoperable WebGIS is proposed based on GML. The basic of it is using GML to encode geospatial data and transport geospatial data over the Web. This paper uses WFS as a data query mechanism to interactively access and retrieve geospatial data at the feature level on the Web, and SVG is used to output superior quality and flexibility vector maps on Web browser. Compared with WebGIS implementation using WMS, this new method can acquire and integrate geospatial data from heterogeneous sources, and dynamically implement interoperable WebGIS at the feature level in real time.

Key words: Geography markup language(GML), Web feature service(WFS), Scalable vector graphics(SVG), WMS, WebGIS

摘要： 提出了一种基于GML实现互操作WebGIS的新机制。该机制以GML实现多源数据存储与传输为基础，利用WFS实现地理数据要素层存取、检索与更新，在客户端以SVG方式输出高质量矢量图形。与传统的WMS实现Web服务相比较，该机制能实时动态地实现异构、跨平台下地理数据要素层互操作。

关键词: GML, WFS, SVG, WMS, WebGIS