Fig. (a): Sky plot in galactic co-ordinates of YSO H emitters selected using criterion A (filtering by IR excess, Sect. 2.7). Fig. (b): Sky plot in galactic co-ordinates of YSO H emitters selected using criterion B (filtering by pEW). Fig. (c): Sky plot in galactic co-ordinates of YSO H emitters selected using criterion C, which is the intersection of sources in A and B. In Fig. (c), the plot is zoomed in around the Galactic plane. The star-forming regions are labelled following Avedisova (2002). The sources are colour-coded by their accretion luminosity calculated using med-GSP-Phot extinction (Sect. 2.4). The few sources without med-GSP-Phot extinction are shown in grey.