french map

french-map-spec.json

{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "padding": 5,
  "width": 400,
  "height": 300,
  "data": [
    {
      "name": "table",
      "url": "https://raw.githubusercontent.com/deldersveld/topojson/master/countries/france/fr-departments.json",
      "format": {"type": "topojson", "feature": "FRA_adm2"}
    }
  ],
  "projections": [
    {
      "name": "projection",
      "size": {"signal": "[width, height]"},
      "fit": {"signal": "data('table')"},
      "type": "mercator"
    }
  ],
  "scales": [
    {
      "name": "color",
      "type": "quantize",
      "domain": {"data": "table", "field": "properties.ID_1"},
      "range": {"scheme": ["#D2F2EB", "#1DC09A"], "count": 4}
    }
  ],
  "legends": [{"fill": "color", "orient": "bottom", "direction": "horizontal"}],
  "marks": [
    {
      "name": "layer_0_marks",
      "type": "shape",
      "from": {"data": "table"},
      "encode": {
        "update": {
          "fill": {"scale": "color", "field": "properties.ID_1"},
          "stroke": {"value": "white"},
          "ariaRoleDescription": {"value": "geoshape"},
          "tooltip": {"signal": "datum.properties"}
        }
      },
      "transform": [{"type": "geoshape", "projection": "projection"}]
    }
  ]
}