to prove my point, here is a perfect example.
you'll notice 5 things in this link.
(1) Houston's Metro Area has 5.9 million people in it
(2) it's the 5th most populated Metro Area in the nation
(3) it's population density is ranked 31 out of 50 of the biggest Metro Areas in the nation
(4) Houston only has 4,109 people per square mile
(5) Houston has as many people as San Diego, Las Vegas and Milwaukee COMBINED, but it has about 1500 people LESS per square mile
http://agbeat.com/economic-news/amer...-dense-cities/