来自瑞士各地的4000棵树的数据集,其中包括截面测量的树干直径和树枝体积
Markus Didion1, Anne Herold2, Esther Thürig2
1Forest Resources and Management, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland. markus.didion@wsl.ch.
Scientific data
|May 9, 2024
概括
这项研究引入了大量树干测量的数据集,以改善森林库存模型. 这些数据支持在全球范围内准确估计和验证树体积函数.
科学领域:
- 林业科学 林业科学
- 定量生态学 是一种定量生态学.
- 森林测量 森林测量
背景情况:
- 估计树干量对于森林库存至关重要,但传统上需要时间和成本密集的测量.
- 现有的种植库存估计模型依赖于使用实证数据进行参数化,而实证数据具有历史限制.
研究的目的:
- 为了呈现一个全面的数据集,从砍伐的树木的截面智能干测量.
- 为提高树体积函数的准确性和一致性提供经验数据.
- 在全球范围内支持森林库存估计和模型验证.
主要方法:
- 编制和修订了40349棵被砍伐的单个树木的数据集,并进行了截面干部测量.
- 包括经验上得出的粗 (直径≥7厘米) 和细枝的树木子集的体积.
- 1888年至1974年间在瑞士各地收集的数据,涵盖了不同的地形和物种.
主要成果:
- 该数据集包含了40349棵树的详细测量,包括粗枝和细枝的体积.
- 这些数据涵盖了广泛的历史时期 (1888年至1974年) 和瑞士内的地理范围.
- 该数据集适用于参数化和验证树体积模型.
结论:
- 这种大规模的数据集为推进森林库存技术提供了宝贵的资源.
- 这些数据可以提高种植库存估计和整个树体积计算的准确性.
- 这些发现支持在林业中开发更强大和普遍适用的体积函数.
相关概念视频
01:19Survival Tree
80
Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
Building a Survival Tree
Constructing a...
Building a Survival Tree
Constructing a...
80
01:21Structural Properties and Dimensions of Lumber
90
Wood's structural properties derive from fibers aligned along the tree's length, contributing significantly to its mechanical strength. Wood exhibits up to twenty times greater tensile strength along these fibers compared to across them, and generally shows better performance under compression than tension. The length of fibers varies, with hardwoods having fibers around one twenty-fifth inch long and softwoods ranging from one-eighth to one-third inch.
The strength characteristics of...
The strength characteristics of...
90