NYC subway map, without subways
I was changing trains the Chambers Street Subway station last week and saw this unusual poster:

It’s obviously a riff on this standard MTA poster seen in many stations:

Who would post a pre-civilization map of New York City in place of the regular subway map? And why? It’s either an artistic statement or a teaser for an ad campaign. Take your best guess.
I’m not suggesting a connection, but it brings to mind the cover story in National Geographic Magazine this month, “Before New York”.
