N. American cities w/census tracts > 50k/sq. mile

[G W North]

I found this list very interesting.

Only 3 Canadian cities and 7 American cities have census tracts with over 50,000/square mile. More than half of New York city's population live in such super-dense census tracts, but no other city has more than 2 square miles of census tracts with over 50,000/square mile. American numbers are from 2000 census. Canadian numbers are from 2001 census. Toronto and Vancouver would likely have far larger areas of over 50k people if a census were done in 2004.

City - Square Miles over 50k - Population in Square Miles over 50k - Avg. Pop./square mile in these census tracts

New York - 51.85 - 4,300,168 - 82,937

Toronto - 1.83 - 126,074 - 69,034

Los Angeles - 1.74 - 115,796 - 66,549

Chicago - 1.33 - 85,587 - 64,351

San Francisco - 1.04 - 72,348 - 69,565

Montreal - 0.62 - 40,737 - 65,310

Vancouver - 0.37 - 23,132 - 62,880

Boston - 0.28 - 18,638 - 66,564

Washington - 0.18 - 10,210 - 56,722

Baltimore - 0.03 - 5,446 - 181,533

[monsoon]

[Spartan]

Yes. They are based on a grouping of Block Groups, and are purely arbitrary. However, to be fair- if you throw a map of Census Tracts together, it can get an idea of density.

[Spartan]

I threw this together as an example. You can see where the larger cities are I hope

[Neo]

Where did you find that Spartan?!?!

[Spartan]

I made it

[BigCityAttitude]

You made it, wow. Must have taken a long time.

[Spartan]

Took about 10 seconds. It actually took londer to export the map to .jpg format.

[Spartan]

Here is one for NC. Sorry about the colors- this map was more complex, and had to be compiled by county; the SC map was all ine one file. So it would take a long time to change the color for each of NC's counties.

[G W North]

they will often skip many areas of a city

I'm not sure what you mean. If you mean many parts of a city aren't part of a census tract I don't believe that's right.

[Spartan]

They don't leave out any areas.

[Neo]

Thanks Spartan, that's awesome!

[BigCityAttitude]

I am wondering how you made that...

[Spartan]

^ I have access to this program called ARC Map- Its GIS software.

[BigCityAttitude]

Oh, that explains it