A pre-existing map, either scrutinised by characters or simply positioned within their framing décor, argues rather for an identification between character and spectator, for both of whom maps are a part of their real world. Here is the first of the three other places with maps in Du rififi chez les hommes:
In the second place with maps they are familiar street furniture, positioned at the entrance to Port Royal station, and there is a further map on the platform. This is the ligne de Sceaux, which would later become part of the RER:
The last maps in the film are at the entrance to La Chapelle station, on Ligne 2 of the métro (part of the elevated section to the north):