Atlantic Cities played around with the University of Richmond's newly digitized historical atlas database, which allows
aficionados nerds to play around with lots of information and nifty visualization tricks. One of the coolest resources is the stockpile of historical maps that overlay modern-day ones, which the archive has available for Boston, New Orleans, Philadelphia, and more as well as NYC. The scope of 1776 New York was tiny compared with today'sbut the more you zoom in, the more you can see that the basic grid (even the green lung that is City Hall Park) has remained largely the same for more than two centuries.
· Atlas of the Historical Geography of the United States [University of Richmond]
· The Quaint Plans for American Cities, as We Envisioned Them 200 Years Ago [Atlantic Cities]
· Cool Map Thing archive [Curbed]