{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "the population per state, engineers per state, and hurricanes per state",
  "background": "white",
  "padding": 5,
  "width": 500,
  "data": [
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      "name": "source_0",
      "url": "data/population_engineers_hurricanes.csv",
      "format": {"type": "csv"}
    },
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      "name": "source_1",
      "url": "data/us-10m.json",
      "format": {"type": "topojson", "feature": "states"}
    },
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      "name": "data_0",
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          "type": "lookup",
          "from": "source_1",
          "key": "id",
          "fields": ["id"],
          "as": ["geo"]
        },
        {"type": "filter", "expr": "isValid(datum[\"geo\"])"},
        {
          "type": "geojson",
          "geojson": "geo",
          "signal": "child__row_population_geojson_0"
        },
        {
          "type": "filter",
          "expr": "isValid(datum[\"population\"]) && isFinite(+datum[\"population\"])"
        }
      ]
    },
    {
      "name": "data_1",
      "source": "source_0",
      "transform": [
        {
          "type": "lookup",
          "from": "source_1",
          "key": "id",
          "fields": ["id"],
          "as": ["geo"]
        },
        {"type": "filter", "expr": "isValid(datum[\"geo\"])"},
        {
          "type": "geojson",
          "geojson": "geo",
          "signal": "child__row_engineers_geojson_0"
        },
        {
          "type": "filter",
          "expr": "isValid(datum[\"engineers\"]) && isFinite(+datum[\"engineers\"])"
        }
      ]
    },
    {
      "name": "data_2",
      "source": "source_0",
      "transform": [
        {
          "type": "lookup",
          "from": "source_1",
          "key": "id",
          "fields": ["id"],
          "as": ["geo"]
        },
        {"type": "filter", "expr": "isValid(datum[\"geo\"])"},
        {
          "type": "geojson",
          "geojson": "geo",
          "signal": "child__row_hurricanes_geojson_0"
        },
        {
          "type": "filter",
          "expr": "isValid(datum[\"hurricanes\"]) && isFinite(+datum[\"hurricanes\"])"
        }
      ]
    }
  ],
  "projections": [
    {
      "name": "projection",
      "size": {"signal": "[width, childHeight]"},
      "fit": {
        "signal": "[child__row_population_geojson_0, child__row_engineers_geojson_0, child__row_hurricanes_geojson_0]"
      },
      "type": "albersUsa"
    }
  ],
  "signals": [{"name": "childHeight", "value": 300}],
  "layout": {"padding": 20, "columns": 1, "bounds": "full", "align": "all"},
  "marks": [
    {
      "type": "group",
      "name": "child__row_population_group",
      "encode": {
        "update": {
          "width": {"signal": "width"},
          "height": {"signal": "childHeight"}
        }
      },
      "marks": [
        {
          "name": "child__row_population_marks",
          "type": "shape",
          "style": ["geoshape"],
          "from": {"data": "data_0"},
          "encode": {
            "update": {
              "fill": {
                "scale": "child__row_population_color",
                "field": "population"
              },
              "ariaRoleDescription": {"value": "geoshape"},
              "description": {
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              }
            }
          },
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            {
              "type": "geoshape",
              "projection": "projection",
              "field": "datum[\"geo\"]"
            }
          ]
        }
      ],
      "legends": [
        {
          "fill": "child__row_population_color",
          "gradientLength": {"signal": "clamp(childHeight, 64, 200)"},
          "title": "population"
        }
      ]
    },
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          "width": {"signal": "width"},
          "height": {"signal": "childHeight"}
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      },
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          "name": "child__row_engineers_marks",
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          "style": ["geoshape"],
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                "scale": "child__row_engineers_color",
                "field": "engineers"
              },
              "ariaRoleDescription": {"value": "geoshape"},
              "description": {
                "signal": "\"engineers: \" + (format(datum[\"engineers\"], \"\")) + \"; geo: \" + (isValid(datum[\"geo\"]) ? datum[\"geo\"] : \"\"+datum[\"geo\"])"
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            }
          },
          "transform": [
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              "type": "geoshape",
              "projection": "projection",
              "field": "datum[\"geo\"]"
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          "fill": "child__row_engineers_color",
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          "title": "engineers"
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    },
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      "type": "group",
      "name": "child__row_hurricanes_group",
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        "update": {
          "width": {"signal": "width"},
          "height": {"signal": "childHeight"}
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      },
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                "scale": "child__row_hurricanes_color",
                "field": "hurricanes"
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              "ariaRoleDescription": {"value": "geoshape"},
              "description": {
                "signal": "\"hurricanes: \" + (format(datum[\"hurricanes\"], \"\")) + \"; geo: \" + (isValid(datum[\"geo\"]) ? datum[\"geo\"] : \"\"+datum[\"geo\"])"
              }
            }
          },
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              "type": "geoshape",
              "projection": "projection",
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      ],
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        {
          "fill": "child__row_hurricanes_color",
          "gradientLength": {"signal": "clamp(childHeight, 64, 200)"},
          "title": "hurricanes"
        }
      ]
    }
  ],
  "scales": [
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      "name": "child__row_population_color",
      "type": "linear",
      "domain": {"data": "data_0", "field": "population"},
      "range": "heatmap",
      "interpolate": "hcl",
      "zero": false
    },
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      "name": "child__row_engineers_color",
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      "interpolate": "hcl",
      "zero": false
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      "name": "child__row_hurricanes_color",
      "type": "linear",
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      "range": "heatmap",
      "interpolate": "hcl",
      "zero": false
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}