Extinction profiles integrated through the 3D distribution of differential extinction for sightlines within the Plane (black) and reddening profiles from Green et al. (2018) scaled to A₀ (see text, red solid line). We also show the Green et al. (2018) profiles for four surrounding directions at ±0.25° in longitude and latitude (dotted red line) and their average in non-flagged and all intervals (thick and thin dashed red line, respectively). Our achieved resolution (see Sect. 3) is also shown (pale blue line, right scale. Coordinates are indicated in the graph.