Fig. 3

Image captured by the Phantom 4 Pro in Kasungu in February 2020 covering 800 m by 600 m, with each grid representing 200 m by 200 m. Grids 4, 5, 7 and 8 were used for training the classification algorithm, and an assessment of its accuracy was made using features both within this area (interpolation) and in the surrounding grids (extrapolation)