{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-ostrander-lake-published-profile",
        "evidence_ids": [
          "evidence-ostrander-lake-published-profile"
        ],
        "predicate": "published_route_profile",
        "spatial_scope_ids": [
          "scope-glacier-point-road-corridor"
        ],
        "subject_id": "route-ostrander-lake",
        "temporal_scope": null,
        "value": {
          "elevation_gain_ft": 1500,
          "objective_entity_ids": [
            "waterbody-ostrander-lake"
          ],
          "operational_status_requires_current_check": true,
          "published_start_entity_id": "trailhead-ostrander-lake",
          "published_time": "8 to 10 hours",
          "round_trip_miles": 12.0
        }
      },
      "evidence": [
        {
          "claim_id": "claim-ostrander-lake-published-profile",
          "evidence_id": "evidence-ostrander-lake-published-profile",
          "notes": "",
          "observation_id": "observation-nps-yosemite-ostrander-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "NPS publishes the Ostrander Lake profile, food storage, trailhead vault toilet, seasonal road access, and the October 15 overnight-parking restriction.",
          "observation_id": "observation-nps-yosemite-ostrander-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T00:00:00+00:00",
          "source_id": "source-nps-yosemite-ostrander-trailhead"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/places/000/ostrander-lake-trailhead.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-yosemite-ostrander-trailhead"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "route-ostrander-lake",
      "kind": "route",
      "name": "Ostrander Lake"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260925-yosemite-glacier-point-depth",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/sources/source-nps-yosemite-ostrander-trailhead.json",
      "reason": "Add reviewed Glacier Point Road planning depth.",
      "record_id": "source-nps-yosemite-ostrander-trailhead",
      "record_type": "source",
      "summary": "Add official-source Glacier Point Road routes, access, facilities, vehicle constraints, dated closure evidence, reviewed map points, and explicit gaps."
    }
  ],
  "navigation": {
    "next_id": "source-nps-yosemite-plan",
    "position": 243,
    "previous_id": "source-nps-yosemite-mariposa-grove",
    "total": 587
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "NPS publishes the Ostrander Lake profile, food storage, trailhead vault toilet, seasonal road access, and the October 15 overnight-parking restriction.",
      "observation_id": "observation-nps-yosemite-ostrander-20260925",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-25T00:00:00+00:00",
      "source_id": "source-nps-yosemite-ostrander-trailhead"
    }
  ],
  "record": {
    "locator": "https://www.nps.gov/places/000/ostrander-lake-trailhead.htm",
    "publisher": "National Park Service",
    "source_id": "source-nps-yosemite-ostrander-trailhead"
  },
  "record_type": "source",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.nps.gov/places/000/ostrander-lake-trailhead.htm",
      "publisher": "National Park Service",
      "source_id": "source-nps-yosemite-ostrander-trailhead"
    }
  ]
}