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    "data": {
        "format": {
            "feature": "countries1",
            "type": "topojson"
        },
        "url": "https://gicentre.github.io/data/geoTutorials/world-110m.json"
    },
    "height": 300,
    "mark": {
        "fill": "rgb(149,181,146)",
        "type": "geoshape"
    },
    "projection": {
        "type": "orthographic"
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    "width": 300
}