Plot.plot({
projection: "albers-usa",
color: {
legend: true,
type: "quantile",
n: 9,
scheme: "Blues",
label: "Unemployment rate (%)"
},
marks: [
Plot.geo(counties, Plot.centroid({
fill: (d) => d.properties.unemployment,
channels: {
county: (d) => d.properties.name,
},
tip: true
}))
]
})