20/02/2019

Gravel Quarry

This gravel quarry in Johnson, Vermont (USA) was surveyed with an eBee X drone carrying a senseFly Aeria X camera. The flight height was planned at 122 m (400ft) AED at an estimated GSD of 2.54cm/pix (1 inch). However, because of the depth of the quarry, the final GSD was 3.59 cm (1.41 in)/pixel.