Sawyer Mill Dam Removal Project Middle Impoundment Drone Flight Paths

These are the automated drone flight paths for the middle impoundment area of the Evans et al. Sawyer Mill dam removal study in Dover, New Hampshire, USA. These flight paths are specific to the reservoir response manuscript. A DJI Phantom 3 Professional drone with its original RGB camera equipped with a polarizing filter was used for the study.<br>All flight paths are available as csv files that were exported out of the Litchi mission hub. The pdf file contains screenshots of the paths in DJIFlightPlanner and Litchi. For information on the Litchi flight app, please see their website here: https://flylitchi.com/. The same set of flight paths were flown in both 2019 and 2020 to keep imagery collection consistent. Nadir flight paths had 80% side image overlap and 90% forward image overlap set in DJIFlightPlanner. The imagery angle for the angled flight paths was set to 20 degrees off nadir (-70 gimbal pitch in Litchi), and the paths of the angled flights were manually drawn in Litchi to supplement the nadir flight paths that were designed in DJIFlightPlanner.<br>For the middle impoundment area, the altitude of the drone was set to 200 feet above ground level. <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.

本数据集包含美国新罕布什尔州多佛市埃文斯等人开展的索耶米尔大坝拆除研究中，中部蓄水区的自动化无人机飞行航线。该航线专为水库响应相关手稿设计。本研究采用大疆精灵3专业版（DJI Phantom 3 Professional）无人机，搭载原装RGB相机并加装偏振滤镜。
所有飞行航线均以CSV格式文件导出自Litchi任务中心。PDF文件包含DJIFlightPlanner与Litchi软件中的航线截图。如需了解Litchi飞行应用的相关信息，请访问其官方网站：https://flylitchi.com/。为保证影像采集的一致性，2019年与2020年均采用完全相同的航线方案开展飞行作业。
在DJIFlightPlanner中预设的天底（nadir）航线，其旁向影像重叠率为80%，航向重叠率为90%。倾斜飞行航线的拍摄角度设置为偏离天底20度（对应Litchi软件中云台俯仰角为-70°），且倾斜航线为在Litchi中手动绘制，用于补充DJIFlightPlanner设计的天底航线。
针对中部蓄水区，无人机飞行高度设置为距地面200英尺。
本数据集相关材料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——生态、社会与经济权衡的多尺度耦合系统研究”（又名“大坝的未来”（Future of Dams））制作。该项目获得美国国家科学基金会研究基础设施改进项目资助，资助编号为NSF #IIA-1539071。本材料中表达的任何观点、发现、结论及建议均为作者个人观点，不代表美国国家科学基金会的官方立场。