{
    "mark": "geoshape",
    "data": {
        "url": "https://vega.github.io/vega-lite/data/us-10m.json",
        "format": {
            "feature": "counties",
            "type": "topojson"
        }
    },
    "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
    "projection": {
        "type": "albersUsa"
    },
    "encoding": {
        "color": {
            "value": "black"
        }
    },
    "description": "Default map size"
}