I believe that Florida State law mandates that car hire companies give you a map and/or driving directions.
This came about at the same time that hire vehicle licence plates were changed to make them indistinguishable from 'normal' plates.
A few years ago, it was seemingly routine to 'carjack' hire cars as tourists becamse lost leaving the airports.
Most car hire desks have a pad of local maps - you simply tear off the top copy.