{
    "height": 500,
    "config": {
        "view": {
            "stroke": null
        }
    },
    "mark": {
        "strokeOpacity": 0,
        "type": "geoshape"
    },
    "data": {
        "url": "https://vega.github.io/vega-lite/data/londonBoroughs.json",
        "format": {
            "feature": "boroughs",
            "type": "topojson"
        }
    },
    "width": 900,
    "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
    "encoding": {
        "color": {
            "field": "id",
            "type": "nominal"
        }
    }
}