“What would a real-world place like New York City look like as an 8-bit video game map? I started wondering, so I created 8-Bit NYC, mixing the lo-fi overhead world maps of 1980s role-playing and adventure games with the kind of geographical data that drives today’s web maps and GPS navigation. It’s interactive (like Google Maps), letting you zoom from a view of the whole city, down to an individual street — any address, anywhere in the city.”
http://8bitnyc.com/

more info here