基于缓冲区的道路中心线提取方法与应用

Road Centerline Extraction Method Based on Buffer and Its Application

为解决提取双线路网道路中心线生成单线路网的难题,在分析传统中心线提取方法存在的难以处理大范围路网和处理效率低下等问题的基础上,提出了在ArcGIS中将缓冲区工具与ArcScan栅格矢量化工具相结合的方法。该方法将双线路网的缓冲区转为栅格,并增加空白栅格,可大范围、快速提取道路中心线,从而生成单线路网,可为各类交通规划分析带来便利。

To solve the problem of extracting road centerline from double road network to generate single road network,we analyzed the prob-lems in traditional road centerline extraction method,such as difficult to deal with road network in large scale and the low efficiency at first.And then,we proposed a method of combing buffer toolbox with ArcScan grid vectorization toolbox in ArcGIS.This method converts the buffer of double road network into grid,and adds the blank grid,which can rapidly extract road centerline in large scale,and generate single road network.The result can bring many conveniences to transportation planning analysis.