基于WF的杉木人工林交互式疏伐可视化模拟技术

以湖南攸县黄丰桥国有林场为试验区,以杉木人工林为试验对象,测定林木胸径、树高、冠幅等测树因子及林木位置信息。利用WF技术,在定义林分生长模型、林分结构分析与林分疏伐模型等5种活动的基础上,利用人机交互方式,以图形形式建立了林分生长、林分结构与林分疏伐间交互的可视化工作流模型,实现了林分交互式疏伐可视化模拟。采用GDI+绘图技术与MOGRE渲染引擎技术,实现了林分结构、林分2维状态与林分3维场景的可视化模拟。结果表明:林分生长、林分结构与林分疏伐间的交互关系得到了直观的可视化模拟,此方法面向经营者具有可操作性强的特点。林分疏伐前后的林分结构、2维状态与3维场景得到了形象与逼真的模拟。应用交互式疏伐可视化模拟技术,可实现林分疏伐过程、效果以及林分未来状态的可视化模拟,实现对林分疏伐的实时监管,提高林分疏伐数字化管理水平。

Visualized Simulation of Interactive Thinning in Chinese Fir Plantation Based on Workflow Technique

Huangfengqiao State-owned Forest Farm in Hu'nan Province was selected as a test zone, and a Chinese fir plantation as the research object. The DBH, height, crown width and location were measured. Based on defining the growth models, analyzing forest structure and establishing thinning models with workflow technique, a visualized workflow model which could express the interactive relationship among stand growth, stand structure and stand thinning was built in graphical form by using human-computer interaction mode based on the workflow technique and realized the visual simulation of the interactive thinning. The stand structure, 2-D state and 3-D scene were simulated by using the GDI+ method and the MOGRE technique. The results showed that the interactive relationship among stand growth, stand structure and stand thinning was intuitively simulated and the operability of this method designed for the manager was better, and that the stand structure, 2-D state and 3-D scene were realistically simulated around thinning time. The visual simulation of the interactive thinning can visually simulate the process and effect of thinning and the future state of stand, and can monitor the thinning in real time and promote the computerized management of thinning.