test.json

{
  "sources": {
    "task-thermal-source": {
      "type": "geojson",
      "data": "https://raw.githubusercontent.com/tceglar/heat/master/data/bigsample.geojson"
    }
  },
  "layers": [
    {
      "id": "task-heatmap-layer",
      "type": "heatmap",
      "source": "task-thermal-source",
      "maxzoom": 15,
      "paint": {
        "heatmap-weight": [
          "interpolate",
          ["linear"],
          ["get", "mag"],
          0,
          0,
          6,
          1
        ],
        "heatmap-intensity": ["interpolate", ["linear"], ["zoom"], 0, 1, 15, 1],
        "heatmap-color": [
          "interpolate",
          ["linear"],
          ["heatmap-density"],
          0,
          "rgba(252,255,164,0)",
          0.25,
          "rgb(252,166,12)",
          0.5,
          "rgb(222,82,56)",
          0.75,
          "rgb(149,38,103)",
          1,
          "rgb(68,10,104)"
        ],
        "heatmap-radius": [
          "interpolate",
          ["linear"],
          ["zoom"],
          0,
          0,
          1,
          1,
          7,
          1,
          9,
          6,
          12,
          11,
          15,
          25
        ],
        "heatmap-opacity": [
          "interpolate",
          ["linear"],
          ["zoom"],
          6,
          0,
          6.1,
          0.3,
          10,
          0.6,
          15,
          0.5
        ]
      }
    }
  ]
}