Sawyer Mill Dam Removal Project Vegetation Area Drone Flight Paths

These are the automated drone flight paths for the vegetation 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 vegetation area, the altitude of the drone was set to 150 feet above ground level. The angled flight paths had to be traced and executed manually due to an error in Litchi (“waypoint distance too close”). This was not fixed for the 2020 flight date, so the angled flights were manually flown in 2020, as well.<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.