{
  "type": "FeatureCollection",
  "features": [{
    "type": "Feature",
    "geometry": {
      "type": "Polygon",
      "coordinates": [[[8.20, 50.00], [8.30, 50.00], [8.30, 50.05], [8.20, 50.05], [8.20, 50.00]]]
    },
    "properties": {
      "name": "Stadtgrenze Mainz"
    }
  }]
}