Urban Layers – Explore the structure of Manhattan’s urban fabric

Very neat! It's somewhat surprising just how old most of Manhattan is.

I do find it a little ironic that towards the bottom of the About page it quotes Le Corbusier:

> "New York is not a finished or completed city. It gushes up. On my next trip it will be different. Those of us who have visited it are asked this question: "When you were there in 1939, or in 1928, or in 1926, or in 1920, was such and such already there? Oh, really, you don't know then what an effect that makesl" Such is the rhythm of the city."

Considering that his Radiant City urban planning philosophy, along with Robert Moses, nearly disassembled this city, and some of the most infamous blights of NYC (and a cause of continued skepticism towards urban development) were executed under his design philosophies.

From the site:

> It appears that your browser is not supported! We currently support Chrome and Firefox.

But I am using Chrome!

Nice!

What caused the 10-yearly spikes for 1900, 1910 & 1920 - was it some kind of construction census?