利用GIS技术模拟角规测树研究  

Experiment on Tree Measurement with Angle Gauge Imitated by GIS Technologic Method

作　　者：雷宇[1] 冯仲科[1] 吴露露[1] 隋宏大[1] 

机构地区：[1]北京林业大学测绘与"3S"技术研究中心,北京100083

出　　处：《林业调查规划》2009年第3期1-5,共5页Forest Inventory and Planning

基　　金：精密光电角距测量定位关键技术及低成本智能化仪器研制(国家863目标导向项目;2009AA12Z327)

摘　　要：通过G IS软件对角规测树过程进行模拟,研究不同的角规系数与通视条件对角规测树结果造成的影响.实验结果表明,角规计数需最大样圆才能确定样地中的断面积,而最大样圆受到树木的相对位置、树木的胸径、选用的角规系数的影响;角规系数的选择与角规卡口的宽度与大部分树的胸径有关.最后对G IS模拟角规绕测时树木遮挡情况进行了分析.The process of angle gauge＇ s tree measurement was imitated by GIS software to study the impact of different angle gauge＇ s indexes and perspective conditions on the result of the measurement. The experimental results show that maximum circle is necessary to determine basal area of sample plots in angle gauge＇s counting, while maximum circle is affected by relative position, breast diameter, angle gauge＇ s index selected. The selection of angle gauge is related with the width of the angle gauge mount and breast diameter of majority trees. The situation of tree measurement by GIS imitating angle gauge is analyzed.

关 键 词：GIS 角规测树 最大样圆 角规系数 

分 类 号：S758.7[农业科学—森林经理学] P208[农业科学—林学]