VLA-COSMOS 3 GHz Large Project mosaic with grayed-out regions masked in the COSMOS2015 catalog because of the presence of saturated or bright sources in the optical to NIR bands. Also indicated are the areas covered by Subaru Suprime Cam (blue full line, corresponding to the outer edge of the unmasked area), and UltraVISTA (Ultra Deep Survey with the VISTA telescope; orange dash-dotted line; see Laigle et al. 2016 and references therein). The masked regions reduce the effective area to 1.77 deg² with 8696 (80%) out of 10 830 radio sources outside the masked areas.