{
  "version": 8,
  "metadata": {
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      "height": 64
    }
  },
  "zoom": 0.5,
  "sources": {
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      "type": "geojson",
      "data": {
        "type": "FeatureCollection",
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            "type": "Feature",
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            "geometry": {
              "type": "Point",
              "coordinates": [ -10, 0 ]
            }
          },
          {
            "type": "Feature",
            "properties": { "x": 5 },
            "geometry": {
              "type": "Point",
              "coordinates": [
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              ]
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          }
        ]
      }
    }
  },
  "glyphs": "local://glyphs/{fontstack}/{range}.pbf",
  "layers": [
    {
      "id": "symbol",
      "type": "symbol",
      "source": "geojson",
      "layout": {
        "text-field": "A",
        "text-font": [
          "Open Sans Semibold",
          "Arial Unicode MS Bold"
        ],
        "text-size": {
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            [ {"value": 10, "zoom": 1}, 28 ]
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}