[2019-9-4] Tidal Area Drone Orthomosaic, Digital Surface Model, and Processing Report

This is the drone orthomosaic, digital surface model (DSM), and PhotoScan-generated report for the September 4, 2019 sampling date for the Evans et al. Sawyer Mill dam removal study. This data is for the tidal 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 total station was 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 July date in the report title - it was not properly deleted before exporting the report out of PhotoScan.<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.

本数据集包含2019年9月4日采样日的无人机正射影像、数字表面模型（Digital Surface Model，DSM）以及由Agisoft PhotoScan生成的报告，对应Evans等人开展的Sawyer Mill大坝拆除研究。该数据采集自美国新罕布什尔州多佛市贝拉米河的潮汐研究区域。本次航拍采用大疆精灵3专业版小型无人机系统（DJI Phantom 3 Professional）获取航空影像，影像处理工作在Agisoft PhotoScan专业版中完成，同时使用拓普康全站仪（Topcon total station）采集测量数据。
本数据集的XY坐标采用WGS 84坐标系，垂直基准面为以米为单位的NAVD88基准。如需了解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）。请注意忽略报告标题中的7月日期，该日期在从PhotoScan导出报告时未被正确删除。
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"）的相关资源制作。本项目由美国国家科学基金会研究基础设施改进项目资助（项目编号NSF #IIA-1539071）。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。