摘要
毛竹Phyllostachys edulis林是一种具有较高经济效益和生态效益的特殊森林类型,科学经营管理毛竹林不仅能有效地保护生态环境,而且对发挥毛竹林的经济效益具有十分重要的现实意义。如何提高毛竹林经营管理的技术水平一直是经营者关注的焦点。采用集成Onyx TREE BAMBOO,3ds Max和ArcGIS等种软件,重点将前者的三维建模功能和后者的三维显示功能相结合,实现毛竹林分的三维可视化,旨在为毛竹林科学经营管理提供新的技术方法。选择浙江省天目山国家级自然保护区内的毛竹林为研究对象,建立100 m×100 m固定标准地,用全站仪测定每株毛竹的基部三维坐标(x,y,z),调查毛竹的胸径、竹高、枝下高和冠幅等因子。根据调查数据,基于OnyxTREE BAMBOO和3dsMax软件,对不同生长状态的毛竹进行三维建模,再导入ArcGIS,在Arc Scene中与数字高程模型(DEM)叠加,最终实现毛竹林分的三维可视化。研究取得较好的可视化效果,观察者既可以俯瞰整片竹林,掌握竹林整体状况,也可以深入竹林内部,直观了解毛竹的具体生长状态,如毛竹的死活、弯直、折断、倒伏等,以及地表的起伏状况。单击任一株毛竹,还可以很方便地查看其相关信息包括毛竹的竹高、胸径、冠幅、枝下高、坐标等。此外,借助ArcScene的漫游功能,可以实现竹林内部实时漫游观察,可以设定漫游路径,实现固定路径漫游,以及将漫游动画保存为视频格式进行输出。研究探索出了一套完整的毛竹林可视化技术方法,此方法可操作性强,应用于毛竹林可视化经营管理,不仅可以真实反映毛竹林分的当前生长状况,还可以直观展现竹林采伐或自然干扰后的林分状况,为进一步研究毛竹林动态变化的可视化奠定了基础。
Moso bamboo(Phyllostachys edulis), a special type of forest with high economic value and ecological benefits, requires scientific management that will effectively protect the ecological environment as it promotes economic benefits. Therefore, to provide a new technology and methodology for improved scientific management of the moso bamboo stand, the 3D modeling function of BAMBOO Onyx TREE and 3ds Max software were combined with the 3D display function from Arc Scene software in Arc GIS to realize a 3D visualization of the bamboo stand. Next, a moso bamboo stand with a standard sample plot size of 100 m × 100 m was chosenin the National Nature Reserve of Mount Tianmu, Zhejiang Province. Total Station was used to measure the three dimensional coordinates of each moso bamboo, as well as diameter at breast height(DBH), bamboo height, branch height, and crown width. Based on survey data, 3D models of different growth state of bamboo were made by Onyx TREE BAMBOO and 3ds Max. These were then imported into Arc GIS and overlaid with DEM in Arc Scene to make a visualization of the moso bamboo stand. Results showed a favorable visual effect.The observer could not only overlook the entire bamboo stand, but could also virtually go into the stand to see the specific growth state of moso bamboo, such as living or dead, standing or curving, and broken or lodging, as well as the rolling woodland surface. By clicking on a bamboo, relevant information was easily obtained including height, DBH, crown width, and branch height. In addition, real-time roaming within the bamboo stand was realized in Arc Scene, and fixed path roaming could be realized by setting the roaming path. Additionally,roaming animation could be saved as a video format for output. From this study, a set of complete visualization techniques for the moso bamboo stand with favorable operability was obtained that could not only reflect the current growth situation of the stand, but could also display the stand status after cutting or natural disturbance,and provided a foundation for further study on the visualization of a moso bamboo stand's dynamic change.
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2016年第5期826-833,共8页
Journal of Zhejiang A&F University
基金
国家自然科学基金资助项目(31170595)
国家林业局林业公益性行业科研专项(201504303)
"十二五"国家科技支撑计划项目(2012BAD22B0503)
教育部留学回国人员科研启动基金资助项目(20101561)
