Ground sampling distance (GSD) is how much ground one pixel covers. It controls detail in aerial photos and maps. Enter altitude and your drone camera's sensor width, focal length and image size.
How it works
GSD = sensor width × altitude ÷ (focal × image width).
FAQ
Legal altitude limit?
In the U.S., recreational and Part 107 flights are limited to 400 ft (122 m) above ground in most cases.
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