Edge-on view of the global maps of the Milky Way, showing the number of stars observed (upper panels), the median [Fe/H] (middle panels) and median [Mg/Fe] (lower panels) distribution for the APOGEE-2 sample only (left), and combined to the transformed GALAH data (right side) in 0.2 kpc × 0.2 kpc bins. On the upper left panel, the grey area illustrates the region not covered at all by the APOGEE-2 survey, but that has been observed by the GALAH survey. In each panel, the dashed black line shows the Galactic mid-plane, and the yellow circle indicates the location of the Sun. We note that R preserve the sign of the X-axis to show the opposite side of the Galaxy.