1. In 1764, New York was a small fort and trading post on the tip of Manhattan.
3. In 1829, NYC had moved further up the island and small cities were growing across the East River.
But most of current NYC was just farmland.
4. By 1834, Brooklyn had become its own city.
6. By 1856, the NYC grid system was fairly well established.
7. Although, as of 1856, there were still no bridges and boats were the only method of transportation off of Manhattan.
8. By 1863 Brooklyn was heavily populated, Astoria was becoming a city in its own right, and Central Park existed.
9. 1868 saw the further expansion of the grid into the Bronx.
10. Long Island City existed by 1873.
11. In 1891 almost all of Manhattan was developed, at least with roads.
12. By 1895, good quality roads crisscrossed most of the city.
13. In 1909, the part of Queens east of Astoria was still green and mostly untouched.
14. In 1916, an idea was floated to dam the East River, and increase the length of Manhattan.
15. Grand Central Station was a major hub by 1918.
16. The subway was in use by 1924.
It is represented by the green lines.
18. By 1939, plans were already drawn up to expand public transit.
20. In 1967, the USSR commissioned a map of the greater New York area.
24. NYC in 2010 was a melting pot, though still surprisingly segregated.
Red is white, blue is black, green is Asian, orange is Hispanic, gray is other, and each dot is 25 people.
25. In 2011, someone made a map of NYC based on Twitter and Flickr information.
Orange dots are locations of Flickr pictures. Blue dots are locations of tweets. White dots are locations that have been posted to both.