A way to visualize multidimensional data for census tracts.

• Blue = White
• Green = Black
• Red = Asian

This is a first working version, not at all optimized or designed.

Data from bl.ocks.org: New York Census Tracts by Mike Bostock.

Fetching of American Community Survey data inspired by Observable: Racial distribution in NC by Mark McClure.

The variables used are documented in the ACS API Reference.