Extinction comparison between GSP-Phot and Bayestar19 for a randomly selected sample of 1 million sources. Panel (a): skymap of A₀ provided by GSP-Phot, taking a pixel-wise median value. Panel (b): skymap of A_V provided by Bayestar19, taking a pixel-wise median value. Panel (c): one-to-one comparison of the GSP-Phot median A₀ and the Bayestar19 A_V. Both skymaps use the Mollweide projection where lines of constant latitude are horizontal straight lines parallel to the equator. All panels show the identical sample of stars. The missing data in panels (a) and (b) are due to the footprint of Bayestar19.