Velocity distribution in the v_x−v_y space (left panel) and in the v_z−v_y space (right panel) of the stars labelled as halo (true positives, blue points), stars wrongly labelled as halo (false positives, red squares), and stars wrongly labelled as non-halo (false negatives, orange points), for the test case when using photometry and full phase-space information on the ideal GUMS selected sample in the Solar neighbourhood.