基于栅格数据最优路径的汶川县公路选线分析

在ArcGIS软件支持下,采用最短路径函数算法对汶川县内绵池镇到映秀镇进行最优路径选择。运用DEM数据提取坡度、起伏度数据;从DEM提取地形要素特征来生成流域并提取河网。最后把坡度、起伏度、河流分类后数据进行加权计算,并最终求取最优路径。研究结果可以作为公路选线的辅助决策,具有重要实践价值。

With the support of ArcGIS software, the shortest path function algorithm is used to select the optimal route from Mianchi Town to Yingxiu Town in Wenchuan County. The DEM data was used to extract the slope and degree of undulation data. The DEM was used to extract the characteristics of the terrain features to generate the watershed and extract the river network. Finally, the data of slope, degree of undulation, and river classification are weighted and the optimal path is finally obtained. The results of the study can be used as an auxiliary decision for highway alignment and have important practical value.