最短路径分析是网络分析系统的最基本的功能之一, 在地理信息系统(G IS )中有着重要应用。将栅格法应用于矢量图层中进行节点的预处理,-The shortest path analysis is one of the basic functions of network analysis system, has important applications in geographic information systems (G IS) in. Grid method will be appli