The data here is from 2004, and covers 70,000 square miles. This is from a Carnegie Mellon student, Alexander Cheek, who majors in Information Design. Pretty interesting conclusions to be drawn from this view.
NYC – Any and every American city is built up out of Avenues and Streets, most of them numbered. A much nicer way to describe a city is by mapping its neighborhoods. As in this map of Manhattan.
Manhattan – A variation on Map #2a done by Alexander Cheek. The differences between these two maps indicate that neighborhoods in Manhattan are ‘fluid’, and constantly evolving.