基于GIS的木材运输计划决策支持系统

制定木材运输计划需要大量的空间和非空间数据。基于GIS的木材运输计划决策支持系统 ,对线性规划和GIS技术进行集成 ,以运材费与集材费的综合费用为寻找最小费用路径和最佳楞场空间位置的目标函数 ,建立线性规划模型。运输费、可采木材材积和木材定货量等模型参数以MPS文件格式存储 ,实现LINDO与系统间的数据交换。系统是制定木材运输计划的有效工具 ,也为编制作业计划提供重要的基础数据

GIS-BASED DECISION SUPPORT SYSTEM FOR WOOD TRANSPORTATION PLANNING

Modern wood transportation planning requires not only a lot of numeric data but also spatial data. GIS based Decision Support System for Wood Transportation Planning (GDSSPP) was combined with linear programming (LP) method utilizing GIS based techniques. The combined costs of road and off road transport was taken as the objective function to find the least cost route and the optimal landing locations of wood transportation. The transport costs and allowable wood volume of stands were calculated. An LP model was developed to allocate timber resources among mills in order to minimize the wood transport costs from harvesting sites to mills. The parameters of the LP model, including the transport costs, allowable wood volume and wood orders, were written into a text file in MPS format which were then accessed by solver LINDO to solve the LP problem. The system is an effective tool for forest managers to complete wood tactical planning in wood procurement. Basic information for operative planning is also supplied by the system.