Validation of the SOM estimates with “out-of-bag” objects. The COSMOS2020 SOM described in Sect. 3 is built again ten times, excluding every time ∼3000 galaxies randomly extracted from those with a SFR_UVIR. The figure compares SFR_SOM and SFR_UVIR for each SOM realization (histograms of different colors). The Gaussian fit to the ensemble of distributions (green line) has mean μ = −0.005 and standard deviation σ = 0.205 dex.