基于SVG的多边形叠置分析算法初探

Preliminary study on algorithms of polygon's overlay analysis based on SVG

SVG(Scalable Vector Graphic)即可升级矢量图形,是一种基于XML的矢量图形描述规范。由于SVG的很多特性非常符合WebGIS的特点,所以现在基于SVG的GIS网站很多。然而,由于SVG文件本身并不保存拓扑关系,其空间分析功能的实现一直是一个难题。本文介绍一种基于SVG的叠置分析算法的实现方法,目的是提供一种基于简单数据结构叠置分析的算法。

SVG（ Scalable Vector Graphic） is scalable vector graphics that is a rule of description of vector graphics. Because a lot of features of SVG are very consistent with characteristics of WebGIS, now there are many GIS websites based on SVG. As the SVG document itself does not preserve the topological relations, it＇ s difficult for spatial analysis. This paper introduces a method of overlay analysis based on SVG. The purpose of this paper is to provide an algorithm of overlay analysis based on sample data structure.