{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          116.4074,
          39.9042
        ]
      },
      "properties": {
        "name": "北京",
        "population": 21540000
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          121.4737,
          31.2304
        ]
      },
      "properties": {
        "name": "上海",
        "population": 24870000
      }
    }
  ]
}