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Development of the forest-road-network planning method by using DIGITAS

使用 DIGITAS 开发森林道路网络规划方法

基本信息

批准号：
06660182
负责人：
KITAGAWA Katsuhiro
金额：
$ 1.15万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06660182/
关键词：
Forest road network Terain analysis Topographic analysis Dangerous zone of slope failure Road network planning Digital Terrain Model DTM Digital Terrain Analysis System DIGITAS Geographic Information System GIS 循環型林道網

项目摘要

The aim of this research project was to develop the method of systematically laying out forest road networks based upon the topographic features analyzed by the digital terrain analysis system (DIGITAS). Through this project, the prototype method of laying out only the forest road network of the endless type could be developed. Now, the work is half-finished and the dendriform road network could not be developed due to a shortage of time. In this research, the color print-station which was introduced by the fund of this research project was useful to distinguish many topographic features on the subject area.The main points of the concepts of the method for systematically laying out forest road networks of the endless type was as follows : (1) The forest road network was composed of line segments connecting any two pair of grid points in the digital elevation model within an allowable gradient as specified by a forest road standard. (2) The forest road network was composed of main forest roads each of which was extended in or near the same altitude to both sides near the guide line, that is, the inner boundary at intervals of the maximum hauling distance from the outer one and sub forest roads which connected two parallel main roads. (3) The main forest road was laid out by considering its effective zone as wide as possible. (4) The sub forest road was laid out near or along a thick ridge.In this research project, the following subjects were investigated ; (1) how to pick up the guide lines for searching the main forest roads, (2) how to make the most efficient connection matrix for searching the forest road network, (3) how to estimate the location of slope transformation.

本研究的目的是开发一种基于数字地形分析系统（DIGITAS）分析的地形特征的系统布局林道网的方法。通过该项目，可以开发出只布设无止境式林道网的原型方法。现在，这项工作已经完成了一半，由于时间紧迫，树状道路网无法开发。本研究利用本研究基金引进的彩色印片站，对研究区的许多地形特征进行了区分，提出了系统布设环形林道网的方法，其概念要点如下：（一）林道网由数字高程模型中任意两对网格点在林道允许坡度范围内连接的线段组成标准(2)林道网由林道主干线和林道次线组成，林道主干线以最大运输距离间隔向林道两侧延伸，林道次线连接两条平行主干线。(3)主要林道的布局考虑其有效区尽可能宽。(4)在本研究计画中，主要探讨以下几个问题：（1）如何撷取主要林道搜寻的导引线，（2）如何建立最有效的林道网路搜寻连结矩阵，（3）如何估测边坡转换的位置。