Kiel diagram: log g versus effective temperature colour coded according to metallicity for stars in the Milky Way field as derived using OssicoNN astrophysical parameters (left panel) and the GES recommended values (right panel). Superimposed are three isochrones for an age of 5 Gyr and three metallicities ([Fe/H]=0: orange, [Fe/H=1]: green, [Fe/H=1]: blue) with colours that match the colormap). generated using PARSEC version 1.2S (Bressan et al. 2012, Chen et al. 2014). Stars were selected from the Catalogue dataset where ‘GES_TYPE = GES_MW’, with temperature, surface gravity, and metallicity derived by the classical pipelines, totaling 44 756 stars.