Kinematic definition of the MW outer disc. The top row shows the pdf (left) and cumulative mass distribution (right) as a function of pericentre values, R_min. The vertical lines mark the local minima of the pdf on the left, setting up the boundaries between the bulge (R_min < 2.1), inner (2.1 < R_min < 5.5 kpc) and outer disc (R_min > 5.3 kpc). The group of the bottom panels illustrate the outer disc selection in [Mg/Fe] − [Fe/H] (middle left), x − y (middle right), age–[Fe/H] (bottom left) and R − z (bottom right) coordinates. The maps are colour-coded by the stellar mass fraction of the outer disc relative to the total stellar mass in corresponding coordinates.