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Population Choropleth

Note: the counties aren’t clipped to water boundaries, so they look a bit weird and the corresponding density calculation is inaccurate. So don’t copy this example without fixing those problems first, ok? See the us-atlas project for a more comprehensive Makefile of examples, and the projected choropleth example for a better style. Also, you’ll want to add a legend for the color scale.

To build this example, git clone this repo, npm install, and then make.