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geo_choropleth.vg.json
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geo_choropleth.vg.json
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{
"$schema": "https://vega.github.io/schema/vega/v5.json",
"background": "white",
"padding": 5,
"width": 500,
"height": 300,
"style": "view",
"data": [
{
"name": "source_1",
"url": "data/unemployment.tsv",
"format": {"type": "tsv"}
},
{
"name": "source_0",
"url": "data/us-10m.json",
"format": {"type": "topojson", "feature": "counties"},
"transform": [
{
"type": "lookup",
"from": "source_1",
"key": "id",
"fields": ["id"],
"values": ["rate"]
},
{
"type": "filter",
"expr": "isValid(datum[\"rate\"]) && isFinite(+datum[\"rate\"])"
}
]
}
],
"projections": [
{
"name": "projection",
"size": {"signal": "[width, height]"},
"fit": {"signal": "data('source_0')"},
"type": "albersUsa"
}
],
"marks": [
{
"name": "marks",
"type": "shape",
"style": ["geoshape"],
"from": {"data": "source_0"},
"encode": {
"update": {
"fill": {"scale": "color", "field": "rate"},
"ariaRoleDescription": {"value": "geoshape"},
"description": {
"signal": "\"rate: \" + (format(datum[\"rate\"], \"\"))"
}
}
},
"transform": [{"type": "geoshape", "projection": "projection"}]
}
],
"scales": [
{
"name": "color",
"type": "linear",
"domain": {"data": "source_0", "field": "rate"},
"range": "heatmap",
"interpolate": "hcl",
"zero": false
}
],
"legends": [
{
"fill": "color",
"gradientLength": {"signal": "clamp(height, 64, 200)"},
"title": "rate"
}
]
}