Map visualization with D3.js

Map visualization with d3.js

In order to visualize the number of cases of COVID-19 across different counties of the US, we need to upload us-covid-19.csv in to the Observable notebook. Also another file, which is named counties-albers-10m@1.json, is needed to plot the US map at the county level. The notebook is located here: https://observablehq.com/@mehrdadyousefi/covid-19-in-the-us