Confusion matrices resulting from the Random Forest classification on the validation test sets are shown for LS10 (left panel), GDR3 (middle panel), and CW2020 (right panel). The colour scale in the panels represents the number of sources per cell, with darker shades indicating higher counts. The entries along the main diagonal (top-left to bottom-right) indicate correctly classified sources. The different total number of sources across the three matrices reflects the variations in survey depth, spatial resolution, and source density among the three surveys.