{
  "checkedAt": "2026-09-25",
  "region": {
    "source": "https://www.rvr.ruhr/themen/staatliche-regionalplanung/",
    "independentCities": [
      "Bochum",
      "Bottrop",
      "Dortmund",
      "Duisburg",
      "Essen",
      "Gelsenkirchen",
      "Hagen",
      "Hamm",
      "Herne",
      "Mülheim an der Ruhr",
      "Oberhausen"
    ],
    "districts": [
      "Recklinghausen",
      "Unna",
      "Wesel",
      "Ennepe-Ruhr-Kreis"
    ],
    "counts": [
      11,
      4
    ],
    "memberAuthorities": 15,
    "formula": "11 + 4 = 15",
    "duesseldorfCityIsMember": false
  },
  "citySource": "https://www.duesseldorf.de/wirtschaft-und-standort",
  "limitations": [
    "Member authorities are not population shares or a count of all municipalities.",
    "No measured route, distance, travel time or arrival is claimed.",
    "Personal history is based on the creator caption."
  ]
}