Sawyer Mill Dam Removal Study Middle Impoundment GCP Photos

These are ground truth photos for a subset of the surveyed GCPs for the middle impoundment area in the Evans et al. Sawyer Mill dam removal study (Dover, NH, USA). These photos were used to help mark the GCPs in the drone imagery in Agisoft PhotoScan Professional for the drone imagery collection dates relevant for the reservoir response manuscript. They are provided here for transparency and in case anyone wants to create their own versions of the PhotoScan models. Please note that the file name corresponds to the date surveyed and GCP ID. For the July 19, 2019 measurements, there was a mix up where the GCPs' surveyed point number was used as the PhotoScan marker label rather than the GCP ID (but the correct coordinates were used, see survey spreadsheet and scanned survey notebook sheets). These points' images are labeled with their GCP ID here. Also some of the marker labels diverged from their GCP IDs for the 8.9.2019 measurements while managing them in PhotoScan, which is also noted in the file names.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.Special thanks to the students who helped survey these markers in the field and processed the survey data.