SPRUCE Terrestrial Laser Scans of Experimental Plots Beginning in 2015

This data set comprises terrestrial laser scanning (TLS) point clouds from the SPRUCE experimental plots located in the S1-Bog of the Marcell Experimental Forest (MEF) near Grand Rapids, Minnesota. In 2015 and 2020 the 12 experimental SPRUCE plots were scanned near peak foliage. In 2016, 2017, 2018, 2019, and 2021 the 12 plots were scanned prior to green up and once near peak foliage (Table 1). Additional data will be added through summer 2023. A RIEGL VZ-1000 unit was used to collect all scans. Four TLS scans in each plot were registered to produce a single point cloud per plot using RiSCAN PRO v2.3 software. Up to six additional scans were registered to account for data occlusion when necessary. Point clouds are saved in LAS (.las) 1.2 format. Point clouds were geo-registered to surveyed plot locations. There are 156 *.las files provided with this dataset. A free, open source, and easy to use software for visualization (Figure 1) and processing of point clouds (CloudCompare, v2.12.3, 2022) can be found at http://www.cloudcompare.org.本数据集包含采自美国明尼苏达州大急流城附近马塞尔实验林（Marcell Experimental Forest, MEF）S1泥炭沼泽样区的SPRUCE实验样地的地面激光扫描（Terrestrial Laser Scanning, TLS）点云数据。2015年与2020年，研究团队在植被冠层盛期对全部12个SPRUCE实验样地完成扫描作业；2016、2017、2018、2019及2021年，则分别在植被返青前与冠层盛期各开展一次扫描（详见表1）。截至2023年夏季，本数据集还将追加更多数据。所有扫描作业均采用RIEGL VZ-1000设备完成。每个样地的4次TLS扫描结果通过RiSCAN PRO v2.3软件配准，生成单样地点云；必要时可额外配准最多6次扫描数据以弥补数据遮挡问题。点云数据以LAS 1.2格式（.las）存储，且已根据实地勘测的样地坐标完成地理配准。本数据集共提供156个*.las格式文件。配套提供一款免费开源、易于使用的点云可视化（见图1）与处理软件CloudCompare（v2.12.3, 2022），其官方下载地址为http://www.cloudcompare.org。