Cutout of the classification map focusing on an [O III]λ5007 bright H II region hosting a Wolf-Rayet star (Neugent & Massey 2011), marked by the light blue star symbol. The colours in the map quantitatively represent the predicted contribution to each pixel’s spectra from an H II region (green scale), a PN (blue), and a SNR/DIG (red). We overlay a S/N map (in shades of grey). The additional star symbols in yellow and gold represent massive stars respectively brighter than 20 mag and between 21 and 20 mag in the F475W HST filter (Williams et al. 2021).