Extinction maps A_Ks (first column) and associated uncertainties (second column) for the Central region of the GALACTINUCLEUS survey. The scales are different for each panel according to the values of the maps and they are indicated by the colour bar. The dashed rectangles on the upper panels indicate a region where no J-band data wereavailable due to bad data quality (for further details, see Nogueras-Lara et al. 2019a). White regions indicate that there were not enough stars to assign a value. Lower panel: false colour image using JHK_s bands. The dashed white lines indicate dark clouds that can be identified in the extinction map corresponding to the second layer.