Map of the observed field of M33 showing the regions for the extraction of the integrated spectra and their neural network classification. We show the RGB map of three key emission lines for the entire observed field of M33, with the red scale representing the [S II]λ6716, 6731 flux, the blue the [O III]λ5007 flux, and the green the Hα flux. On top of this, we mark the contours of the regions of spectrum extraction coloured based on the model’s classification: green for H II region, blue for PNe, red for SNRs, and gold for DIG.