>The flaw with this map is that it shows dominance over diversity. Farther out in the suburbs racial neighborhood divisions are less sharp.<p>This is a pretty serious flaw, as it's assigning a winner-takes all color to each building. Is the data available to do color-blending to show proportions of different races?<p>Also, whenever I see a map like this, I wonder if there's a way to take the current state of a region, and combine it with Schelling's segregation model ( <a href="http://nifty.stanford.edu/2014/mccown-schelling-model-segregation/" rel="nofollow">http://nifty.stanford.edu/2014/mccown-schelling-model-segreg...</a> ) to estimate the percentage of similar neighbors desired.
I guess that it correctly represents the predominant race of my block, but with the qualification that a) the split is probably about 60/40, and b) diversity goes to the household level.