“…An NDVI value close to zero is appropriate for Impervious land cover (NDVII ≈ 0), while high positive values are appropriate for various types of Vegetation cover, while in the literature for our conditions different threshold values are assumed between NDVII and NDVIV, from 0.1 to 0.3 or even 0.6, depending on the type of remote sensing data used, image properties and the season [58]. If, for example, NDVIV = 0.8, NDVII = 0.1 and Vegetation fractional cover f = 0.5, then the resulting value NDVI = 0.45 will be recorded in the basic field.…”