Point cloud data from terrestrial laser scanning for stem volume modelling of Scots pine trees

Stem volume is a key forest inventory attribute characterizing growth and yield of individual trees and forest stands. Three-dimensional information from terrestrial laser scanning (TLS) can be used to reconstruct tree stems and provide information on stem volume as well as stem shape. We collected diameter at breast height and height information with traditional field measurements as well as preprocessed TLS point cloud data on 230 Scots pine trees (Pinus sylvestris L.) from southern Finland. The data set here includes three-dimensional information on Scots pine tree stems derived from TLS point clouds. The usage of this data set can include, but is not limited to, development of point cloud processing algorithms for single tree stem reconstruction and investigations of of stem volume modelling for Scot pine. This data set includes two files: Scots_pines.txt includes DBH and height information based on field measurements from the 230 Scots pine trees. File includes the following columns: treeID, DBH, and h, where DBH is presented in cm and h (i.e. tree height) in m. Stem_points.zip, on the other hand, includes 230 laz-files where figure in the name of the laz-file refers to the tree ID in Scots_pines.txt-file. Laz-files include three columns that describe x, y, and z, coordinates (in meters) of stem points in a local coordinate system extracted from the normalized TLS point clouds (i.e. z coordinate describes height above ground).树干材积是表征单木与林分生长与收获的核心森林调查属性。地面激光扫描（Terrestrial Laser Scanning, TLS）获取的三维点云数据可用于重建树干形态，并获取树干材积与外形相关信息。本研究通过传统野外实测方法，采集了芬兰南部230株欧洲赤松（Pinus sylvestris L.）的胸径（diameter at breast height, DBH）与树高信息，并同步获取了预处理后的地面激光扫描点云数据。本数据集包含由地面激光扫描点云提取得到的欧洲赤松树干三维信息。本数据集的应用场景包括但不限于：开发单木树干重建的点云处理算法，以及开展欧洲赤松树干材积建模相关研究。本数据集包含两个文件：其一为Scots_pines.txt，存储了230株欧洲赤松的野外实测胸径与树高信息。该文件包含三列数据：treeID、DBH以及h；其中DBH单位为厘米（cm），h（即树高）单位为米（m）。其二为Stem_points.zip，内含230个laz格式文件，文件名中的数字对应Scots_pines.txt文件中的树木ID。每个laz文件均包含三列数据，分别为归一化地面激光扫描点云中提取的局部坐标系下树干点的x、y、z坐标（单位为米），其中z坐标代表相对于地面的高度。