Extended Data Fig. 2: Evaluation.
From: An unexpectedly large count of trees in the West African Sahara and Sahel
a, Manually labelled tree crowns from the independent test dataset are compared against predictions. The comparison is done for 100 random plots each having 256 × 256 pixels. Here, the canopy area (in m2) of the trees in the plots is compared. b, As in a, but for the density (the number of labelled or predicted trees per plot). c, As in a, but for mean crown size per plot. d, The crown sizes of 102 in situ measured trees from 2 field campaigns in Senegal (Extended Data Fig. 4) are compared with the predicted ones. Extended Data Table 2 provides more details. n = 100 plots with 256 × 256-pixel size.
