Happy Valentine’s Day!

Waxing and Waning

While we think of New York (or Manhattan) as being densely populated, our island is actually less dense than it was historically.  I don't think I've seen a better visualization of this than this short 2 minute video on human density.  Note that none of this would have been possible without census data:

Note how our community begins to grow in 1850-60 with the rail line up Park Avenue suddenly encouraging commuting and commerce along this north/south axis.