基于栅格GIS的公交站点覆盖率算法研究

Arithmetic of analyzing bus stops service rate based on raster GIS

本文利用栅格分析技术对公交站点覆盖率的计算进行了改进,从高分辨率遥感影像与公交站点信息数据叠加得到的栅格数据中提取三个栅格矩阵:记录公交站点ID号及其位置信息的栅格矩阵、道路网络上各点的出行阻抗矩阵、不在道路网络上各点的出行阻抗矩阵,对这三个阻抗矩阵进行栅格运算,计算公交站点的覆盖率,并通过南京城区部分公交站点的分布说明本文算法的具体应用情况。

This paper improved the calculation of bus stops service rate using gird analysis approach. Through overlaying high resolution satellite images with the vector data of bus stops, it got the raster data, from which three more raster matrixes were obtained, including the matrix of stops ID and location information, the matrix of travel impedance for each point on the road network, and the matrix of travel impedance for each point off the road network. With grid analyzing of these three matrixes, the bus stops service rate was approached. Finally, combining with the distribution of some bus stops in Nanjing, an example was given to show how this arithmetic worked.