Orbital radial variation (Δ(R_mean - R_GC)) versus galactocen-tric distance (R_GC) of the sample of homogeneous determined stars. The marker size shows the orbital eccentricity of the stars (i.e. smaller size means smaller eccentricity), while the color refers to the metallicity [Fe/H] as reported in the colourbar. The blue line marks a null difference between the R_mean of the orbit and the current R_GC, and marks the local region i.e. 8 ± 1 kpc. Grey line marks those stars that likely migrated from the outer disc (Δ > 1 kpc), while red dashed line marks those stars that likely migrated from the inner disc (Δ < -1 kpc).