square.json

{
  "type": "FeatureCollection",
  "features": [
    {
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              -180,
              -85.051129
            ],
            [
              180,
              -85.051129
            ],
            [
              180,
              85.051129
            ],
            [
              -180,
              85.051129
            ],
            [
              -180,
              -85.051129
            ]
          ]
        ]
      },
      "type": "Feature",
      "properties": {
        "kind": "clouds"
      }
    }
  ]
}