Completeness-corrected number of α-poor RC-GSP-Spec stars in bins of Galactic (X, Y) bins of 200 × 200 × 200 pc near the Galactic mid-plane (−200 < Z < 200 pc) as a function of galactocentric distance in parsecs. We selected α-poor stars as [α/Fe]< 0.1 dex. A dot represents the corrected density for regions in which the expected completeness is greater than 20%. The top and bottom panels correspond to the data displayed in the top left and top right panels of Fig. 10, respectively. We stress that the observed counts should only be divided by completeness for qualitative visualisation and data exploration purposes. Section 3.3 implements a forward-modelling approach to apply the selection function to a density model.