利用SVG技术开发WebGIS系统的方法

从可缩放矢量图形（Scalable Vector Graphics,SVG）标准技术入手,利用SVG的开发原理,结合WebGIS系统的功能要求和解决思路,运用Asp.net、脚本语言JavaScript和DOM技术,实现WebGIS的基本功能。提出了将制图数据转换成SVG图形,并在Web发布SVG地图的技术路线,解决了海量地理空间信息在Internet网络传输速度低、GIS软件平台发布地图时地图数据格式必须为空间数据格式的限制、空间数据发布时数据的安全性等相关技术难点,并在实例中予以应用验证。

A Method of WebGIS System Development Based on SVG Technology

Combined with the Scalable Vector Graphics (SVG) technology, some basic WebGIS functions are achieved in this paper based on Asp. net,Script language (JavaScript) and DOM Techniques. Requirements and solving themes of general WebGIS functions were considered during this process. In this paper, three technology problems were solved. Firstly,the Internet transmission speed of mass geographical spatial information was improved. Secondly,the limit of map data formats for publication required by GIS software platform (spatial data format was mostly required) was released. Thirdly,data security problems in the process of spatial data publication were improved. To solve all these problems,mapping data was conversed into SVG data which was published on WEB later. WebGIS system developed in this paper receives a good result in practices.