a project requires counting the number of people on a beach by using aerial photography. Assuming a 2-ft-diameter circle as a reasonable size for a person when viewed from above, and assuming a film with 80 line pairs per millimeters resolution will be used, what photo scale will be required? If a 152-mm-focal-length camera will be used, what is the required flying height above the beach?
For 80 line pairs per mm, we have 160 lines per mm.
If each of this line shows a person, photo scale will be, 1 line on image =1/160 mm = 2 ft
i.e. photo scale required, 1 mm = 320 ft.
Since scale= focal length of the camera/ flying height above the beach
So, 1 mm/ 320 ft= 150 mm/ flying height
So flying height above the beach = 4800 ft
a project requires counting the number of people on a beach by using aerial photography. Assuming...
We conducted a comprehensive literature search on drones in conservation up to October 2nd 2018, in line with related studies [10,11,35]. All searches were done by the same person in English, mainly using Google Scholar. This was further complemented through reference harvesting, citation tracking, abstracts in conference programs, and author search, using Research Gate and Mendeley (see PRISMA Flowchart in Supplementary Figure S1 Checklist and list of studies reviewed in Table S1). We then removed duplicate and unrelated results. Finally,...