las_vegas.json

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {"location": "las vegas" },
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [-115.4,35.9],
            [-114.9,35.9],
            [-114.9,36.4],
            [-115.4,36.4],
            [-115.4,35.9]
          ]
        ]
      }
    }
  ]
}