Ground-based laser imaging for assessing three-dimensional forest canopy structure
Ground-based laser imaging for assessing three-dimensional forest canopy structure
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DOI：
10.14358/pers.72.12.1349
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发表时间：
2006-12-01
影响因子：
1.3
通讯作者：
Radtke, Philip J.
中科院分区：
文献类型：
--
作者：
Henning, Jason G.;Radtke, Philip J.
改进对林冠结构的评估，更好地将叶级过程与林冠结构和森林生长联系起来，可以促进对森林在碳、养分和水循环中的作用的了解。我们研究了使用高分辨率地面激光成像对森林树冠进行空间清晰评估。在20 m X 40 m地块上，在叶片关闭和叶片开启条件下获得多个范围图像并进行对齐。该地块的位置是在一个混合物种阔叶落叶林在西部北卡罗来纳州。数字地形和树冠高度模型创建了一个0.25平方米的网格。水平，垂直和三维分布的植物面积指数，创建使用基于间隙分数的估计，有0.5米的分辨率为立方晶格。个别树的测量，包括树的位置和直径在乳房高度，从扫描仪数据的位置，平均在0.43米和直径在5厘米的独立测量，分别。我们的方法和结果证实，地面激光扫描的应用程序提供了高分辨率，空间上明确的措施，图级森林冠层结构。
Improved understanding of the role of forests in carbon, nutrient and water cycling can be facilitated with improved assessments of canopy structure, better linking leaf-level Processes to canopy structure and forest growth. We examined the use of high-resolution, ground-based laser imaging for the spatially explicit assessment of forest canopies. Multiple range images were obtained and aligned during both leaf-off and leaf-on conditions on a 20 m X 40 m plot. The plot location was within a mixed species broadleaved deciduous forest in western North Carolina. Digital terrain and canopy height models were created for a 0.25 m square grid. Horizontal, vertical, and three-dimensional distributions of plant area index, created using gap-fraction based estimation, had 0.5 m resolution for a cubic lattice. Individual tree measurements, including tree positions and diameter at breast height, were made from the scanner data with positions, on average, within 0.43 m and diameters within 5 cm of independent measurements, respectively. Our methods and results confirm that applications of ground-based laser scanning provide high-resolution, spatially-explicit measures of plot-level forest canopy structure.