Cutouts of the classification map focusing on the Ciardullo et al. (2004) PNe, identified by the light blue circles (panels a–h) and two additionally identified PNe, marked in grey (panels i, j). Each colour of the RBG map quantitatively represents the predicted contribution to each pixel’s spectra from an H II region (G), a PN (B), and a SNR/DIG (R). We overlay a S/N map (in shades of grey), derived from the Hα flux map and its associated error map. On the top right of each cutout, we write the PN contribution for the identified PNe averaged over an aperture of 1.5″ of diameter centred on the probability peak. On the bottom left, we specify whether the PN is isolated or its emission appears to be blended to that of other regions. The green circle in panel h marks a nearby SNR from the Lee & Lee (2014) and Long et al. (2018) catalogues.