基于SVG技术WebGIS的实现方案

简要介绍了SVG(可缩放向量图形)的特点和优点,根据“地图元素”的表现方式和组织结构,定义了相关数据结构。实现了应用XML(扩展标记语言)进行“地图元素”属性数据的存储和交换,用W eb Service(网页服务)实现跨平台的地理信息服务,用SVG、JavaScript实现客户端的地图显示、导航、缩放、用户交互。本文不仅阐述了一种基于SVG的W ebG IS的具体实现,而且基于XML、W ebService、SVG的各种特点,设计了一个数据交换、显示、交互方案,在W ebG IS、动态交互网页、实时监控等方面都有借鉴意义。

Implementation of WebGIS Based on SVG

This paper introduces the features and advantages of Scalable Vector Graphics(SVG).Relevant data structure is defined based on the representation and organizing of Map Element.Then,XML(eXtensible Markup Language) is used for storage and exchange of Map Element metadata.Web service is used for cross-platform geographical data service and SVG JavaScript are used on client terminals for map display,navigation,zoom and user interactivity.The paper not only describes implementation of SVG-based WebGIS,but also gives the architecture for data exchange,display and interactivity based on features of XML,Web service and SVG.The architecture provides beneficial reference for WebGIS,Active Web page and realtime monitoring.