Binned spatial distribution (step equal to 0.5 deg) of differences in estimated extinction ∆A_I. Each panel depicts the differences between the extinction (A_I) estimated from purely optical or near IR-optical color excesses (E (G_BP – I), E (V – I) and E (I – K_s)), and the extinction estimated from the E (J – K_s) color excess. The insets focus on an area below the Galactic plane where we binned (blue circles, seventeen steps between −9.5 to 9.5 deg) the ∆A_I as a function of ℓ with gray dots representing individual RR Lyrae stars.