Fig. 8

Spatial degradation of orthophotos from the original 1.66 cm pixel⁻¹ resolution (a) to 3.32 cm pixel⁻¹ (b), 6.64 cm pixel⁻¹ (c), 9.96 cm pixel⁻¹ (d), 13.28 cm pixel⁻¹ (e), 26.56 cm pixel⁻¹ (f), 53.12 cm pixel⁻¹ (g) and 106.24 cm pixel⁻¹ (h) used for the calculation of spectral vegetation indices. The corresponding digital surface models (DSMs) are displayed in i–p