The city boundaries, which I admit is kind of arbitrary/weird for LA (city). If you include the county, or MSA it's obviously way less dense.

What bothers me the most is how so many Americans seem to have this irrational fear of cities. They think they are more dangerous, dirty, difficult, etc than they really are, by a wide margin. And they vastly under-estimate the amenities and quality of life they bring, along with the extent to which they make all of the wealth of the country even possible.

They wring their hands and complain that allowing more building will turn their city into NYC, which is just crazy on the face of it.