D3: project Choropleth Map "No geoJson file"

D3: project Choropleth Map "No geoJson file"
0

#1

https://learn.freecodecamp.org/data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map/

This project wants me to create US map using this file

https://raw.githubusercontent.com/no-stack-dub-sack/testable-projects-fcc/master/src/data/choropleth_map/counties.json

The problem is it is not a geoJson file, So how am I suppose to create a map without a geoJson file?