Normalized cumulative distribution of the projected distances of YSOs to the nearest Herschel map pixel with A_{K, Herschel} >  0.8 mag (green pixels, Fig. 9). Separated in colors are the three YSO classes: Class I (protostars, red), flat-spectrum sources (flats, orange), and Class II/III (disks, blue). The observed distributions are shown as black lines, and the color shaded areas show the confidence interval contours at 68.3%, 95%, and 99.7% (1 σ, 2 σ, and 3 σ). The first bin, indicated by the vertical gray dashed line, gives the resolution of Herschel (36″, 0.07 pc at 414 pc). Hence, sources in the first bin are projected directly on top of regions of high dust column-density.