OK. I have linked to this guy before. He has 40 cities up here. Find Dallas here.
I should add that this is 2000 Census data. Each dot equals 25 people.
/Eric Fischer's photostream.
After seeing it, I'm not even as interested in the racial component near as much as the sporadic population centers. With the Trinity and its levees in the news, and considering the development patterns, I begin to wonder how much flood control we would actually need with 1) a more compact development form 2) less impervious surface and 3) better (slower and less concrete) stormwater runoff/watershed management.