[2020-8-5] 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 August 5, 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 the Evans et al. Sawyer Mill dam removal reservoir response manuscript for additional information on the products. This product set was also used in Alexandra's dissertation (University of New Hampshire, 2021). <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.

本数据集为Evans等人针对Sawyer Mill大坝拆除研究，对应2020年8月5日采样日期的无人机正射影像、数字表面模型（Digital Surface Model, DSM）以及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Bellamy河中下游库区研究区域。本次航拍影像采用DJI Phantom 3 Professional小型无人机系统采集，并通过Agisoft PhotoScan Professional软件完成影像处理；野外实测数据主要依托Topcon Hiper Lite+设备采集。
本数据集的XY坐标系采用WGS 84，垂直基准面为以米为单位的NAVD88。如需了解该数据集的更多相关信息，请参阅Evans等人发表的《Sawyer Mill大坝拆除库区响应》研究手稿。该数据集同时被应用于Alexandra于2021年完成的新罕布什尔大学博士学位论文。
本材料基于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”（又名“大坝的未来”）所产生的资源开发制作。本项目由美国国家科学基金会研究基础设施改进项目NSF #IIA-1539071提供支持。本材料中表达的任何观点、研究发现、结论及建议仅代表作者本人，未必反映美国国家科学基金会的官方立场。