This opening is matched towards the end of the film when the gangland boss who had ordered the killing of the man above is himself on the run, first in the métro and that at the surface, emerging in the same place as his victim, earlier:
The other map in the film is where we would expect to find it, at the police station, but it takes some time to appear. We see much of the detail of what the police inspectors have put up on the walls of their office (posters for Star Wars and The Enforcer, photos of the Rolling Stones and ads for a rock radio station, objects associated with the Corsican football team Bastia, a pair of underpants framed with a medal...), none of which is connected to the practicalities of their work, as a map might be: