{
  "prepared_at": "2026-09-07T00:54:21.984796+00:00",
  "coverage_file": "coverage.json.gz",
  "coverage_groups": 66887,
  "record_fields": [
    "record_id",
    "coverage_group",
    "value"
  ],
  "variables": {
    "footprintArea": {
      "file": "statistics/footprintArea.json.gz",
      "count": 1002746
    },
    "footprintPerimeter": {
      "file": "statistics/footprintPerimeter.json.gz",
      "count": 1002746
    },
    "accuracy": {
      "file": "statistics/accuracy.json.gz",
      "count": 2010916
    }
  },
  "methods": {
    "footprintArea": "WGS84 ellipsoidal area of the original valid polygon or multipolygon, excluding holes, in km². Invalid, empty and nonpolygon geometries are excluded. This is mapped footprint area, not displaced volume, runout distance or a deduplicated affected area.",
    "footprintPerimeter": "WGS84 ellipsoidal length of all exterior and interior footprint rings in metres. Sensitive to mapping resolution and fragmentation; not runout distance.",
    "accuracy": "Nonnegative location accuracy in metres as supplied in the compact source record. The interface charts only positive values: zero codes do not demonstrate measured zero positional error. Extreme source values are retained on a logarithmic scale. This is reported precision, not independently measured error."
  },
  "excluded_footprints": {
    "invalid_or_nonpolygon": 3618
  },
  "counting_note": "Counts describe source records/representations, not distinct disasters. Point and polygon catalogues and different native inventories can overlap.",
  "reuse": "Source terms in ../manifest.json and the NASA notice in ../licenses/nasa-coolr.txt apply. Numerical geometry measurements are NKUA derivatives; source geometry remains unchanged."
}