US choropleth map (canvas)

See also the SVG version

<Plot
    projection="albers-usa"
    color={{
        scheme: 'blues',
        label: 'Unemployment (%)',
        legend: true,
        n: 5,
        type: 'quantile'
    }}>
    <Geo
        canvas
        data={counties}
        fill={(d) => d.properties.unemployment} />
</Plot>