Figure 2: (a–c) Inverse-distance weighting and integration of lakes and reservoirs.
From: Near-global freshwater-specific environmental variables for biodiversity analyses in 1 km resolution

(a) Scheme for obtaining the inverse distance weighting factor for calculating the weighted average and sum of the variables. The position of the letters in the stream network (inset) correspond to their approximate position on the curve. (b,c) Illustration of the modified HydroSHEDS12 stream network before (b) and after (c) integrating the lakes and reservoirs of the Global Lakes and Reservoirs Database13.