block_example.js

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature", 
      "geometry":{
        "type":"Polygon",
        "coordinates":[
          [[ -118.47000042983923, 34.027237322664057 ], 
          [ -118.46997469284874, 34.027150122627894 ],
            ...
          [ -118.47001119572749, 34.027273718128079 ], 
          [ -118.47000042983923, 34.027237322664057 ]]
        ]
      }
    },
    // more features continue here
  ]
}