Zoomable Choropleth showing United States county-level data on a number of variables including county health rankings and the 2016 General Election Results.
The Choropleth employs a few interesting features:
utilizes Crossfilter for fast n-dimensional filtering across multiple variables within the data set
uses d3-legend to show chromatic and sequential scales
contains responsive properties that allow the browser to resize the SVG through the ViewBox attribute
I used Power BI to wrangle, munge, and tidy the data into a CSV file.