As it turns out,you can gauge the population density of a
city just by looking at the distribution of public libraries. This, of course, and assumes that cities offer
roughly the same number of libraries per capita,which may not be perfectly
consistent. Regardless, for these five
cities – the largest in the US – the distribution of public libraries does a
decent job of outlining the city boundaries and acting as a proxy for the urban
density. No statistical analysis here –
the maps are just meant to be visually engaging… Data sources:Chicago: https://data.cityofchicago.org/Education/Libraries-Locations-Hours-and-Contact-Information/x8fc-8rcqLos Angeles: https://data.lacity.org/A-Livable-and-Sustainable-City/Library-Branches/a4nt-4gcaNew York City: http://www.nypl.org/locations/Houston: http://houstonlibrary.org/find-it/find-library-locationPhiladelphia: https://libwww.freelibrary.org/branches/branchmap.cfm
Source: tumblr.com