Spatial distribution of R₃₂ (colored contours) overlapping on the Spitzer 8 µm (left panels) and Hα emission (right panels) in grayscale for the SW-BAR and DarkPK regions. The yellow and red contours on the top panels correspond to R₃₂ = 0.2, 0.4, 0.6 and 0.7, 1.0, 2.0, respectively. In the bottom panels, the crosses A, B, C, D, E, and F, indicate the position where R₃₂ was estimated (see Fig. 8).