{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-del-valle-map-eagles-view-location",
        "evidence_ids": [
          "evidence-del-valle-map-eagles-view-location"
        ],
        "predicate": "official_map_location_context",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "group-camp-del-valle-eagles-view",
        "temporal_scope": null,
        "value": {
          "adjacent_to": "parking area 66",
          "east_of": "Lake Del Valle",
          "northwest_of": "park entry kiosk",
          "west_of": "Del Valle Road"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-map-eagles-view-location",
          "evidence_id": "evidence-del-valle-map-eagles-view-location",
          "notes": "Official cartographic placement without deriving a surveyed point coordinate.",
          "observation_id": "observation-del-valle-map-eagles-view-location",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "PDF page 1",
            "Eagles View Group Camp label"
          ],
          "content": "The April 2026 official park map labels Eagles View Group Camp east of Lake Del Valle and west of Del Valle Road, adjacent to parking area 66 and northwest of the park entry kiosk.",
          "observation_id": "observation-del-valle-map-eagles-view-location",
          "observed_at": "2026-04-01T00:00:00+00:00",
          "observer": "Wayproof visual map review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/sites/default/files/del-valle-map.pdf",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "group-camp-del-valle-eagles-view",
      "kind": "group_campsite",
      "name": "Eagles View"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260920-del-valle-eagles-view-evidence",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-del-valle-map-eagles-view-location.json",
      "reason": "Add bounded Eagles View identity, official facilities, and explicitly approximate coordinate evidence.",
      "record_id": "observation-del-valle-map-eagles-view-location",
      "record_type": "observation",
      "summary": "Add official map and camping-page evidence for Eagles View and a separately attributed user-selected Google Maps estimate without altering ReserveAmerica's null GIS fields."
    }
  ],
  "navigation": {
    "next_id": "observation-del-valle-map-rules",
    "position": 34,
    "previous_id": "observation-del-valle-map-2026",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [
        "PDF page 1",
        "Eagles View Group Camp label"
      ],
      "content": "The April 2026 official park map labels Eagles View Group Camp east of Lake Del Valle and west of Del Valle Road, adjacent to parking area 66 and northwest of the park entry kiosk.",
      "observation_id": "observation-del-valle-map-eagles-view-location",
      "observed_at": "2026-04-01T00:00:00+00:00",
      "observer": "Wayproof visual map review",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-del-valle-map-2026-04"
    }
  ],
  "record": {
    "artifact_refs": [
      "PDF page 1",
      "Eagles View Group Camp label"
    ],
    "content": "The April 2026 official park map labels Eagles View Group Camp east of Lake Del Valle and west of Del Valle Road, adjacent to parking area 66 and northwest of the park entry kiosk.",
    "observation_id": "observation-del-valle-map-eagles-view-location",
    "observed_at": "2026-04-01T00:00:00+00:00",
    "observer": "Wayproof visual map review",
    "retrieved_at": "2026-09-20T00:00:00+00:00",
    "source_id": "source-ebrpd-del-valle-map-2026-04"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/sites/default/files/del-valle-map.pdf",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-del-valle-map-2026-04"
    }
  ]
}