{
  "dataset_id": "chw_3_0_machine_readable_package",
  "title": "Coastal Hazard Wheel (CHW) 3.0 — Machine-readable datasets",
  "version": "3.0.0",
  "release_date": "2026-02-21",
  "license": "CC BY 4.0",
  "license_text": "CC BY 4.0 (Creative Commons Attribution 4.0 International)",
  "canonical_page": "https://www.coastalhazardwheel.org/chw-dataset",
  "generated_utc": "2026-02-25T16:43:38Z",
  "primary_key": "chw_code",
  "core_datasets": [
    {
      "filename": "chw_3_0_logic.csv",
      "description": "CHW 3.0 logic table (dimension combinations + hazard screening levels 1–4)."
    },
    {
      "filename": "chw_3_0_hazard_management_matrix.csv",
      "description": "CHW 3.0 hazard management matrix (hazard_id__measure_id binary applicability flags)."
    }
  ],
  "lookups": [
    {
      "filename": "dimensions_lookup_chw3_0.csv",
      "description": "Allowed values for each CHW dimension (dimension_id/value_id)."
    },
    {
      "filename": "hazards_lookup_chw3_0.csv",
      "description": "Hazard vocabulary (hazard_id)."
    },
    {
      "filename": "measures_lookup_chw3_0.csv",
      "description": "Management measure vocabulary (measure_id)."
    }
  ],
  "url_policy": {
    "stable_files": "Individual CSV/README URLs under /chw-dataset/<filename> are intended to be stable and are included per file.",
    "generated_files": "ZIP package URL and this manifest’s own URL may be assigned at upload time; these entries use url=null until populated post-upload.",
    "fallback": "If any URL is unavailable, use canonical_page to locate the current download links.",
    "canonical_page_note": "Canonical landing page (stable): https://www.coastalhazardwheel.org/chw-dataset. This page is the authoritative index of the current release files.",
    "download_urls": "Direct download URLs reference the current published /media/ endpoints on the canonical site.",
    "generated_assets": "ZIP package and metadata.json URLs are assigned at upload/publish time and may be null in this manifest.",
    "canonical_page": "If any URL is null or unavailable, use the canonical_page to locate the current download links."
  },
  "conventions": {
    "hazard_levels_scale": {
      "min": 1,
      "max": 4,
      "meaning": "1=low … 4=very high (screening-level)"
    },
    "matrix_values": [
      0,
      1
    ],
    "matrix_column_naming": "<hazard_id>__<measure_id>",
    "encoding": "utf-8"
  },
  "files": [
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        "delimiter": ",",
        "quotechar": "\"",
        "lineterminator": "\\n",
        "encoding": "utf-8"
      }
    },
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      "filename": "chw_3_0_hazard_management_matrix.csv",
      "media_type": "text/csv",
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    },
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    },
    {
      "filename": "hazards_lookup_chw3_0.csv",
      "media_type": "text/csv",
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        "encoding": "utf-8"
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    },
    {
      "filename": "measures_lookup_chw3_0.csv",
      "media_type": "text/csv",
      "url": "https://www.coastalhazardwheel.org/media/gtnbzrhf/measures_lookup_chw3_0.csv",
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      }
    },
    {
      "filename": "README.md",
      "media_type": "text/markdown",
      "url": "https://www.coastalhazardwheel.org/media/ox2jijve/readme.md",
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    },
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    },
    {
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      "media_type": "text/markdown",
      "url": "https://www.coastalhazardwheel.org/media/to0ps2q3/readme_chw_3_0_management_matrix.md",
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    },
    {
      "filename": "chw_3_0_package.zip",
      "media_type": "application/zip",
      "url": null,
      "bytes": null,
      "sha256": null,
      "note": "Populated post-upload; URL assigned by hosting at upload time."
    },
    {
      "filename": "metadata.json",
      "media_type": "application/json",
      "url": null,
      "bytes": null,
      "sha256": null,
      "note": "This manifest's URL/bytes/sha256 may be populated post-upload; integrity can be verified after publication."
    }
  ],
  "discovery": {
    "canonical_page": "https://www.coastalhazardwheel.org/chw-dataset",
    "statement": "All release artifacts (individual files and any packaged distributions) are discoverable via the canonical dataset landing page. If a direct download URL in this manifest is null or becomes unavailable, retrieve the current links from the canonical page."
  },
  "matrix_column_naming": "{hazard_id}__{measure_id}"
}