macrovision/scripts/mapshaper/us-counties.json

{
    "name": "US Counties",
    "directory": "/media/naturals/US Counties/",
    "shapefile": "E:/macrovision/mapshaper/us-counties/cb_2018_us_county_500k.shp",
    "mode": "forms",
    "base-filter": "true",
    "name-key": "NAME",
    "form-key": "STATEFP",
    "stroke-width": 1,
    "simplify-size": 100
}