Segmentation of the velocity-integrated 2D (position, position) ¹² CO (3–2) COHRS map using the model learnt on the column density image of the Gp with PE-UNet-L at the location centred at (l, b) = 16.5°, 0°. The min–max normalized COHRS (top left) and N_H2 (top right) maps are shown. The corresponding segmented maps using the PE-UNet-L learnt model on N_H2 data are shown for COHRS (bottom left) and N_H2 (bottom right).