[O III] emission versus 24 µm continuum emission (left) and versus Hα (right) in the three star formation regions in 12″ × 12″ pixels and at 48″ resolution (in 24″ × 24″ pixels) for the rest of molecular ridge map with a detection more than 5σ in both. Yellow, blue, red and green colors refer to the regions outlined in Figs. 2 and 3. Gray points represent the pixels in the ridge outside of these identified regions. For the diffuse regions shown in gray and yellow, fit results with a S/N below 5 are shown as upper limits. The black lines in the left plot show the fit linear relation and the 95% confidence interval from Lambert-Huyghe et al. (2022).