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基于三维虚拟环境的林分结构调整可视化模拟技术
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基于三维虚拟环境的林分结构调整可视化模拟技术
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Journal Article
基于三维虚拟环境的林分结构调整可视化模拟技术
2016
Overview
[目的]以真实林分三维场景为模型,结合计算机虚拟现实技术,实现对真实林分结构的调整优化可视化模拟。[方法]以湖南攸县黄丰桥国有林场杉木与鹅掌楸人工混交林为研究对象,采用可视化模拟技术,基于三维虚拟环境建立林分结构调整可视化模拟系统,实现对林分结构的优化调整进行可视化模拟。通过对林分的角尺度、大小比、混交度、开阔比等结构的计算分析,结合公告板显示技术和射线查询算法,在MOGRE构建的林分三维场景中对林分结构调整过程进行可视化模拟。[结果]样地林分结构经过调整后,平均树高由12.8 m变成13.6 m,平均胸径由17.1 cm变成18.6 cm;林分平均角尺度由0.449变为0.481,分布格局由调整前的均匀分布变成随机分布;林分平均大小比由0.511变为0.519,样地内林木生长更具有优势;林分平均混交度由0.093变为0.129,林分结构更加稳定,林分的整体质量也得到了提高。[结论]本研究采用可视化模拟技术和样地调查数据,构建虚拟三维森林环境,在三维场景中,森林经营者不仅能查看样地中每株林木构筑性属性,观察林分样地的整体状态,还能对林分结构进行优化调整,实现在虚拟森林环境中对样地林分结构调整进行可视化模拟。
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