Spatial distribution of the 12.0 µm AIB, its two subcomponents and 12.0₂ (second decomposition), and their ratios. The 12.0₂ µm map includes a set of black contours at 1.15 × 10⁻⁶ W m⁻² sr⁻¹, and blue contours trace the peak 11.25 µm emission at 1.25 × 10⁻⁵ W m⁻² sr⁻¹. θ¹ Ori C is located toward the top right of each map (see Fig. 2). For each map, the range of the corresponding color bar is set between 0.5% and 99.5% percentile level for the data, while zero pixels, edge pixels, and pixels covering the two proplyds, indicated by the black circles, are masked out. The contours trace peak emission for the 11.0 µm AIB (white), the 11.2 µm AIB (teal). The rectangular apertures of the template spectra for the H II region, atomic PDR, DF 1, DF 2 and DF 3, from top to bottom, are shown in white and the solid white lines delineate the IF and the three dissociation fronts, DF 1, DF 2 and DF 3.