{
  "id": 27221,
  "ident": "ZSNJ",
  "iata_code": "NKG",
  "icao_code": "ZSNJ",
  "gps_code": "ZSNJ",
  "local_code": null,
  "name": "Nanjing Lukou International Airport",
  "type": "large_airport",
  "latitude_deg": 31.735032,
  "longitude_deg": 118.865949,
  "elevation_ft": 49,
  "elevation_m": 15,
  "continent": "AS",
  "iso_country": "CN",
  "country_name": "China",
  "iso_region": "CN-32",
  "region_name": "Jiangsu Province",
  "municipality": "Nanjing",
  "scheduled_service": true,
  "wikipedia_link": "https://en.wikipedia.org/wiki/Nanjing_Lukou_International_Airport",
  "total_runway_count": 2,
  "active_runway_count": 2,
  "closed_runway_count": 0,
  "longest_runway_ft": 11811,
  "longest_runway_m": 3600,
  "max_runway_width_ft": 197,
  "has_lighted_runway": true,
  "has_paved_runway": true,
  "surfaces_list": "CON",
  "runways": [
    {
      "id": 235158,
      "airport_ref": 27221,
      "airport_ident": "ZSNJ",
      "length_ft": 11811,
      "width_ft": 148,
      "length_m": 3600,
      "width_m": 45,
      "surface": "CON",
      "is_lighted": true,
      "is_closed": false,
      "le_ident": "06",
      "he_ident": "24",
      "surface_friendly": "Concrete (CON)"
    },
    {
      "id": 314968,
      "airport_ref": 27221,
      "airport_ident": "ZSNJ",
      "length_ft": 11810,
      "width_ft": 197,
      "length_m": 3600,
      "width_m": 60,
      "surface": "CON",
      "is_lighted": true,
      "is_closed": false,
      "le_ident": "07",
      "he_ident": "25",
      "surface_friendly": "Concrete (CON)"
    }
  ],
  "nearby_constraint_matches": [
    {
      "iata_code": "WUX",
      "ident": "ZSWX",
      "icao_code": "ZSWX",
      "name": "Sunan Shuofang International Airport",
      "municipality": "Wuxi",
      "country_name": "China",
      "distance_nm": 81.3,
      "distance_km": 150.6,
      "longest_runway_ft": 10499,
      "longest_runway_m": 3200,
      "has_lighted_runway": true,
      "has_paved_runway": true
    },
    {
      "iata_code": "HFE",
      "ident": "ZSOF",
      "icao_code": "ZSOF",
      "name": "Hefei Xinqiao International Airport",
      "municipality": "Hefei",
      "country_name": "China",
      "distance_nm": 97.5,
      "distance_km": 180.6,
      "longest_runway_ft": 11155,
      "longest_runway_m": 3400,
      "has_lighted_runway": true,
      "has_paved_runway": true
    }
  ],
  "rankings": {
    "published_dataset": {
      "universe_name": "RunwayFacts Published Curated Aerodromes",
      "universe_size": 650,
      "runway_rank": 242,
      "elevation_rank": 516
    },
    "global_commercial_universe": {
      "universe_name": "Qualifying Global Commercial Aerodromes (OurAirports)",
      "universe_size": 7558,
      "runway_rank": 388,
      "runway_percentile": 94.8,
      "elevation_rank": 5916,
      "elevation_percentile": 18.8
    },
    "country_commercial_universe": {
      "country_iso": "CN",
      "country_name": "China",
      "published_national_rank": 29,
      "published_country_count": 55,
      "universe_national_rank": 45,
      "universe_country_count": 264
    },
    "vs_median_large_runway_pct": 18.1
  },
  "provenance": {
    "source_dataset": "OurAirports Open Aviation Database",
    "source_license": "Public Domain (CC0)",
    "data_snapshot_version": "2026-09-01",
    "dataset_integrity": "Cryptographic SHA-256 Checksum Verified & Fail-Closed Schema Inspected",
    "source_verification": "Source-reported aviation registry records; statistical percentiles derived by RunwayFacts",
    "distance_calculation_method": "Haversine Great-Circle Formula (Earth R = 3440.065 NM)",
    "last_verified_at": "2026-09-01"
  },
  "published_national_rank": 21,
  "schema_metadata": {
    "ranking_universe_definitions": {
      "published_dataset": {
        "id": "runwayfacts-published-v1",
        "size": 650,
        "description": "Curated primary commercial aerodromes published on RunwayFacts meeting minimum 3,000 ft paved criteria and IATA code assignment."
      },
      "global_commercial_universe": {
        "id": "ourairports-commercial-universe-20260901",
        "size": 7558,
        "description": "All international aviation facilities in OurAirports meeting commercial aerodrome criteria with active runways."
      }
    },
    "spatial_relation_definition": {
      "max_distance_nm": 100,
      "min_runway_length_ft": 5000,
      "surface_filter": "paved_only",
      "formula": "Haversine Geodesic (Earth R = 3440.065 NM)"
    }
  }
}