城市地下管线缓冲区分析方法研究

Buffer Analysis of City Underground Pipeline

缓冲区分析是地理信息系统中使用非常频繁的一种空间分析,基于地下管线系统缓冲区分析,可以通过计算绘制原始多边形外一定缓冲距离的缓冲区多边形,由缓冲区多边形查询受影响管线段信息。本文通过计算缓冲区多边形边界点坐标的方法,构造缓冲区多边形,利用缓冲区多边形与图上管线段的空间过滤关系,编程实现地下管线缓冲区管线段信息的获取。通过对作者开发的管线管理系统缓冲区分析模块进行测试,最终得到准确的管线段信息。

Buffer analysis is a kind of spatial analysis which is very frequently used in GIS.The buffer analysis,which is based on buffer analysis of underground pipeline system,can draw the buffer polygon by computing the buffer polygon boundary point coordinates which is outside the original polygon and contain the buffer distance.In this paper,the buffer polygon is constructed by calculating the coordinates of the boundary points of the buffer polygon,this paper query the information of the buffer pipeline by using the relationship between the buffer polygon and the pipeline segment.This paper made the obtain of pipelines information comes true with program.By the text of buffer analysis module of the pipeline management system developed by the author,and finally obtained the accurate and intuitive transect and vertical section.