GIS支持下的县乡公路网布局重要度解算方法

Method of GIS-Supported Optimization Tree for County Highway Network Layout

依据县乡公路网的布局特点和原则,采用交通区位线-节点重要度联合的布局调整方法,在区位线方法的基础上,提出交通规划与数字高程模型结合利用的方法,将研究区域地形表面进行了三维模拟,利用GIS相关工具对节点的重要度进行量化显示以解算主要区位线。分析在路网布局调整中的重要度最大树可能存在的问题,优化经验的最大树求解算法,对于重要度最大树的解算实现了GIS软件自动求解和成图。

According to the layout characteristics of the county highway network, this paper adopts the method of traffic zone line-node importance joint, proposes a method combining traffic planning and digital elevation model, The three-dimensional simulation was carried out, and the importance of node was quantified using the related tools of ArcGIS to solve the main regional line. It analyzes the problems of the Optimization tree and solving algorithm to optimize the experience. The ArcGIS software can automatically solve and map the maximum tree of importance degree.