{
  "created": "2026-10-05",
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    {
      "url": "https://data.hydrosheds.org/file/HydroBASINS/standard/hybas_na_lev04_v1c.zip",
      "sha256": "071aaed3095c3459bf95dbf77f299d3ea42c811cf222e3c72413dc293a8fbe57"
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    {
      "url": "https://data.hydrosheds.org/file/HydroBASINS/standard/hybas_na_lev06_v1c.zip",
      "sha256": "6d8e7d8820f5db7c42b4bae5af832265f757b224bce0f705212887b1c12e6d5f"
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      "url": "https://data.hydrosheds.org/file/HydroBASINS/standard/hybas_ar_lev04_v1c.zip",
      "sha256": "b2e1c46b1391ed7acf9b1b3ad448c6334548df6d13ca0e860c34a39dead16878"
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  "method": "HydroBASINS v1cのMAIN_BAS・NEXT_DOWNを使って上流の小流域を結合。沿岸の複数河川をまとめたCOAST区分と内陸閉鎖流域は含めず、原形に自己交差がある場合はmake_validで修復し、境界を0.008度で表示用に簡略化。修復件数は台帳へ記録。",
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  "resolution": "HydroSHEDS 15 arc-seconds south of 60°N; underlying northern elevation data are coarser (HYDRO1k).",
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