[2020-6-3] Middle and Lower Impoundments Drone Orthomosaic, Digital Surface Model, and Processing Report

This is the drone orthomosaic, digital surface model (DSM), and PhotoScan-generated report for the June 3, 2020 sampling date for the Evans et al. Sawyer Mill dam removal study. This data is for the middle and lower impoundment study area on the Bellamy River in Dover, NH, USA. A DJI Phantom 3 Professional small unmanned aerial system was used to collect the aerial imagery. The imagery was processed in Agisoft PhotoScan Professional. A Topcon Hiper Lite+ was mainly used to collect the survey data. <br>The products' XY is in WGS 84, and the vertical datum corresponds to NAVD88 in meters. Please see Alexandra's dissertation (University of New Hampshire, 2021) for additional information on the drone products. Please disregard the September date in the report title - it was not properly deleted before exporting the report. <br>These materials were made using resources from an NSF EPSCoR funded project “RII Track-2 FEC: Strengthening the scientific basis for decision-making about dams: Multi-scale, coupled-systems research on ecological, social, and economic trade-offs” (a.k.a. "Future of Dams"). Support for this project is provided by the National Science Foundation’s Research Infrastructure Improvement NSF #IIA-1539071. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

本数据集涵盖Evans等人开展的Sawyer Mill大坝拆除研究中，2020年6月3日采样时段对应的无人机正射影像镶嵌图、数字表面模型（DSM）以及由Agisoft PhotoScan生成的研究报告。该数据覆盖美国新罕布什尔州多佛市贝拉米河中游与下游蓄水区研究范围。
本次航空影像采集采用大疆精灵3 Professional（DJI Phantom 3 Professional）小型无人机系统，影像后处理工作基于Agisoft PhotoScan专业版完成，野外测量数据主要通过拓普康（Topcon）Hiper Lite+接收机采集。
产出数据的平面坐标系采用WGS 84，垂直基准面为NAVD88，单位为米。如需了解该无人机相关产品的更多细节，请参阅Alexandra的博士学位论文（新罕布什尔大学，2021年）。请注意报告标题中的9月日期为导出前未正确删除的冗余信息，可忽略。
本数据集依托美国国家科学基金会（National Science Foundation, NSF）EPSCoR资助项目“RII Track-2 FEC：强化大坝决策科学基础——多尺度耦合系统生态、社会与经济权衡研究”（又称“大坝的未来”，Future of Dams）制作完成。本项目由美国国家科学基金会研究基础设施改进计划（NSF #IIA-1539071）提供支持。本材料中表达的任何观点、发现、结论或建议均为作者本人观点，未必代表美国国家科学基金会的官方立场。