Studies on roads network planning according to the forest using

在本研究中，我们试图根据森林利用的诸多要求，构建森林公路网规划的支持系统。该系统由四个子系统组成。首先涉及到数字地形模型(DTM)。如何制作数字地面模型以及如何利用数字地面模型进行规划，对于森林规划者或森林管理者来说是非常重要的。这个子系统为他们提供帮助。二是路网规划，包括主干道规划和次干道规划两部分。在道路路径的确定上，我们应用了图论的理论。主干道按施工效果最小的原则规划，将指定的路径点连接起来。根据从林木到道路的可能性来规划次要道路。第三，涉及打滑道路和伐木计划。利用DTM和森林数据库，由规划者与计算机对话，通过CRT获取大量信息，建立伐木计划。最后，建立专家系统，为规划者提供支持。该制度是对林区公路建设拨款的咨询制。

In this studies, we tried to construct the supporting system for forest roads network planning according to many requests of forest use. The system consists in four sub-systems. First of them is concerned in a digital terrain model (DTM). It is very important for forest planner or forest manager how to make a DTM and how to use it for planning. This sub-system assists them. Second is a roads network planning that have two parts which are a main roads planning and a sub-roads planning using DTM.In the determination of road path, we apply to the theories of Graph. Main roads are planned by minimum construction effect for connecting indicated path points each other. Sub-roads are Planned by possibility of logging to roads from stands. Third is concerned in a skidding roads and logging plan. Using DTM and Database of forest, a logging plan is constructed by planner who talks the computer for getting many information through CRT.Last is an expert system for supporting planner. That system is consultant system for a grant to forest road construction.