可伸缩矢量图形技术在WebGIS中的应用探讨

RESEARCH AND APPLICATION OF WEBGIS BASED ON SVG TECHNOLOGY

GIS的本质是分布式的,为了适应当今空间数据类型繁多、数据量大、分布广泛等特点以及多维、动态应用分析需求,将现代信息技术和以计算机网络为依托的分布式处理策略引入到GIS就成为必然。WebGIS使人们通过网络获取并互操作异构地理数据具备了客观条件的可能性,现行WebGIS的实现技术有很多种,各有所长。文章结合SVG(Scalable Vector Graphics),可伸缩矢量图形技术特点,论证了在WebGIS中利用SVG技术进行图形图像传输交互的优点,并介绍了一种合理可行的解决方案。

Scalable Vector Graphics （SVG）, a thin-client technology, is the focus of current researches , which represents the new technical generation and provides many advantages compared to the raster-based presentation and extensibility through other Web programming languages. This paper analyzes the advantages of applying SVG to issue GIS data on the web. Based on SVG, GML and Web Service technologies, a Web distribution system for geographic data, is designed and introduced.