{
  "properties": {
    "abbrev": {
      "type": "keyword"
    },
    "airport": {
      "type": "text"
    },
    "region": {
      "type": "text"
    },
    "city": {
      "type": "keyword"
    },
    "city_location": {
      "type": "geo_point"
    },
    "city_boundary": {
      "type": "geo_shape"
    }
  }
}