1) plane tree
等高树木
2) contour tree
等高线树
1.
Scan-line based contour tree generation method;
基于扫描线的等高线树生成法
2.
Former contour trees have two defects when describing the topological relations of contour lines on the map.
在分析以往等高线树在表达地形图等高线拓扑空间关系时既没有考虑局部地形特征(鞍部、山头、洼地等)又不能很好表达等高线与所围区域之间的关系等缺陷的基础上,提出了增加地形特征等高线构建增量等高线树,以同时表达等高线之间、等高线与所围区域之间两种拓扑空间关系。
3.
This paper builds the spatial relationship of contour using contour tree, forms the similar Douglas conversion model by means of convex-hull and Douglas arithmetic, and then puts forward a new method of automatically identifying the ridge line and the valley floor line.
通过等高线树构建出各条等高线的空间关系,采用计算几何中的凸壳和Douglas算法,建立了似Douglas变换模型,提出了一种自动识别山脊线和谷底线的新方法。
4) contour shrub belt
等高灌木带
1.
Field data shows that reasonable distribution of contour shrub belt is of significant soil and water conservation effect with runoff decrease of over 30%, sediment reduction of more than 50%, and it can also increase plant coverage of 15% to 20% on slope farmland and forms shrub network on hill slope,and change the situation of ecological e.
资料表明 ,配置合理的等高灌木带具有较强的保持水土效益 ,其径流削减率在 3 0 %以上 ,泥沙削减率在 5 0 %以上 ,可增加坡耕地植被覆盖度 15 %～2 0 %,在峁坡上能很快形成林网 ,大大改观坡耕地长期植被稀疏、生态环境恶化状况。
5) individual tree height inversion
单木树高反演
补充资料：等高线
等高线
level lines
等高线[kvd 11.写;yP。朋:瓜H邢j，G代笼n函数的 点集 L*={:‘D:G(:，z。)二又=常数}，0簇几
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条