Test geojson

testgeojson.json

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "id": 0,
      "geometry": {
        "type": "Polygon",
        "coordinates": [[
          [
            0.0011,
            0.0011
          ],[
            0.0019,
            0.0011
          ],[
            0.0019,
            0.0019
          ],[
            0.0011,
            0.0019
          ],[
            0.0011,
            0.0011
          ]
        ]]
      },
      "properties": {
        "tile_id": "1|1"
      }
    },
    {
      "type": "Feature",
      "id": 1,
      "geometry": {
        "type": "Polygon",
        "coordinates": [[
          [
            0.0021,
            0.0021
          ],[
            0.0029,
            0.0021
          ],[
            0.0029,
            0.0029
          ],[
            0.0021,
            0.0029
          ],[
            0.0021,
            0.0021
          ]
        ]]
      },
      "properties": {
        "tile_id": "2|2"
      }
    }
  ]
}