{
  "source": "Natural Earth and OpenStreetMap contributors",
  "release": "Natural Earth 5.1.2; OSM snapshot 2026-10-04",
  "license": "ODbL 1.0; underlying Natural Earth features are public domain",
  "licenseUrl": "https://opendatacommons.org/licenses/odbl/1-0/",
  "coordinateSystem": "WGS84",
  "scale": "Natural Earth 1:10,000,000 with mapped OSM lower Yangtze and Dishui Lake",
  "coverage": "Selected major rivers, lakes and reservoirs in China. Natural Earth river courses are clipped to the existing China extent with a 5 km corridor for international border rivers. The lower Yangtze and its estuary branches continue to open water using OpenStreetMap; these are not clipped to land. Lake Khanka is shown in full. Dishui Lake retains its mapped water edge and interior islands. These features are for geographic context, not current water levels.",
  "sources": [
    {
      "url": "https://raw.githubusercontent.com/nvkelso/natural-earth-vector/v5.1.2/geojson/ne_10m_rivers_lake_centerlines.geojson",
      "snapshot": "ne_10m_rivers_lake_centerlines.geojson",
      "sha256": "9530bdd1db87382143e02604e02e46b86c7247187b76cd8659719bb17cdcda77",
      "selection": [
        "Tuotuo",
        "Tongtian",
        "Jinsha",
        "Chang Jiang",
        "Yangtze",
        "Huang",
        "Nanpan",
        "Hongshui",
        "Xun",
        "Xi",
        "Bei",
        "Dong",
        "Heilong Jiang",
        "Amur",
        "Songhua",
        "Di’er Songhua",
        "Nen",
        "Ussuri",
        "Liao",
        "Xiliao",
        "Huai",
        "Hai",
        "Yongding",
        "Han",
        "Min",
        "Fuchun",
        "Lancang",
        "Za",
        "Nu",
        "Yarlung",
        "Maquan",
        "Tarim",
        "Yarkant",
        "Aksu",
        "Ile",
        "Künes",
        "Ertix",
        "Jialing",
        "Yalong",
        "Gan",
        "Xiang",
        "Yuan",
        "Wei",
        "Yalu"
      ]
    },
    {
      "url": "https://raw.githubusercontent.com/nvkelso/natural-earth-vector/v5.1.2/geojson/ne_10m_lakes.geojson",
      "snapshot": "ne_10m_lakes.geojson",
      "sha256": "1480d7227d3ac50478221d366d0161303ffa66de28f9bbc34cd4e609677d6c71",
      "selection": [
        "Qinghai Hu",
        "Poyang Hu",
        "Dongting Hu",
        "Tai Hu",
        "Hongze Hu",
        "Hulun Nuur",
        "Bosten Hu",
        "Nam Co",
        "Siling Co",
        "Chao Hu",
        "Lake Khanka",
        "Weishan Hu",
        "Ebinur Hu",
        "Ngoring Hu",
        "Gyaring Hu",
        "Yamzho Yumco",
        "Mapam Yumco",
        "Tangra Yumco",
        "Xinanjiang Shuiku",
        "Danjiangkou Shuiku"
      ]
    },
    {
      "url": "https://www.openstreetmap.org/relation/9392345",
      "download": "https://nominatim.openstreetmap.org/lookup?osm_ids=R9392345&format=jsonv2&polygon_geojson=1",
      "snapshot": "osm-yangtze.geojson",
      "sha256": "5a83a4c3037266b9af8ceaa563cd87fb97a99fce7b1152eff153f8cfef9a2a72",
      "license": "ODbL 1.0",
      "licenseUrl": "https://opendatacommons.org/licenses/odbl/1-0/",
      "attribution": "© OpenStreetMap contributors",
      "selection": "Lower Yangtze continuation and mapped estuary branches",
      "joinAdjustmentMetres": 852
    },
    {
      "url": "https://www.openstreetmap.org/relation/5606982",
      "snapshot": "dishui-lake.geojson",
      "sha256": "09621c36f616bfbcd80598c8ce9769a2cbe4ef9f63310aa6a0beb099b5dec547",
      "license": "ODbL 1.0",
      "licenseUrl": "https://www.openstreetmap.org/copyright",
      "selection": "Dishui Lake water polygon with its interior islands",
      "metadata": "data/dishui-lake-source.json"
    }
  ],
  "riverSections": 57,
  "lakes": 21,
  "reconciliation": {
    "report": "data/river-boundary-report.json",
    "originalOverlay": "data/major-water-original.bin",
    "method": "The optional river overlay reuses existing shared administrative vertices only within reviewed river/region pairs. Matching requires a continuous parallel run of at least 8 km, displacement at most 2.5 km and average at most 1.2 km, monotonic traversal, bounded detours and bidirectional proximity. The first and last 1 km of each accepted run taper inside the reviewed reach. Source endpoints and all shared river junctions remain fixed. Selectable administrative geometry is unchanged.",
    "alignedKilometres": 1527
  }
}