{
  "collection": "propdata-open-antarctica",
  "collection_version": "1.0.0",
  "contract": "propdata-open-antarctica/1.0.0",
  "schema_version": "1.0.0",
  "snapshot_id": "aq-open-1.0.0+wd20260928T130329Z",
  "generated_at": "2026-09-28T13:11:23Z",
  "record_count": 382,
  "source_revisions": {
    "wikidata": {
      "retrieved_at": "2026-09-28T13:03:29Z",
      "max_entity_lastrevid": 2550263337,
      "entity_revisions": "per record: source_revision"
    },
    "rema": {
      "revision": "REMA mosaic v2.0 32m (dem, unfilled)",
      "url": "https://pgc-opendata-dems.s3.us-west-2.amazonaws.com/rema/mosaics/v2.0/32m_dem_tiles.vrt"
    },
    "natural_earth": {
      "ne_10m_land": "5.1.1",
      "ne_10m_minor_islands": "4.1.0",
      "ne_10m_antarctic_ice_shelves_polys": "4.1.0"
    }
  },
  "license_manifest": "open-antarctica-sources.json",
  "attribution": "Compiled and normalized by PropData from the attributed open sources.",
  "data_license": "Compilation released under CC BY 4.0; Wikidata facts are CC0; elevations derived from REMA (CC BY 4.0, Polar Geospatial Center).",
  "summary": {
    "record_count": 382,
    "object_classes": {
      "airfield": 33,
      "field_camp": 15,
      "logistics_facility": 6,
      "other_facility": 75,
      "research_facility": 85,
      "research_station": 124,
      "seasonal_station": 44
    },
    "object_status": {
      "active": 2,
      "closed": 66,
      "null": 314
    },
    "seasonality": {
      "null": 277,
      "seasonal": 62,
      "year_round": 43
    },
    "terrain_enriched": 371,
    "missing_elevation": 11,
    "with_operator": 158
  },
  "quality_gates": {
    "passed": true,
    "gates": {
      "identity_unique": true,
      "identity_format": true,
      "coordinates_valid": true,
      "provenance_complete": true,
      "terrain_provenance": true,
      "class_vocabulary": true,
      "no_forbidden_property_concepts": true,
      "non_empty": true
    },
    "duplicate_count": 0,
    "invalid_coordinate_published_count": 0,
    "rejected_count": 66,
    "rejected_by_reason": {
      "conflicting_coordinates": 50,
      "coordinate_offshore": 15,
      "mixed_natural_feature": 1
    }
  },
  "files": {
    "propdata-open-antarctica-1.0.0.geojson": {
      "bytes": 462747,
      "sha256": "d4422f2df3f650a153ea13f03852af11c42d9c4ce005b2990cf43870ff4acf0b",
      "record_count": 382
    },
    "propdata-open-antarctica-1.0.0.csv": {
      "bytes": 162837,
      "sha256": "7ab4d8e82ff9e503f1d00785ffbaac86bd12134a0e3233a253bb8a99e19955ce",
      "record_count": 382
    },
    "propdata-open-antarctica-1.0.0.parquet": {
      "bytes": 50012,
      "sha256": "e3a980d4bb770c67d8226d7335b1600a05ef842c8261e36d69716e7cce4afd44",
      "record_count": 382
    },
    "open-antarctica-sources.json": {
      "bytes": 6240,
      "sha256": "c32608bfe521a7ed8f5fed57a76d8138a5e1b41489330f90e3871611957612f3",
      "record_count": null
    }
  }
}
