{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-taboose-trailhead-elevation",
        "evidence_ids": [
          "evidence-taboose-trailhead-elevation"
        ],
        "predicate": "published_elevation",
        "spatial_scope_ids": [
          "scope-trailhead-taboose-pass"
        ],
        "subject_id": "trailhead-taboose-pass",
        "temporal_scope": null,
        "value": {
          "feet": 5400,
          "navigation_grade": false,
          "qualifier": "approximate"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-taboose-trailhead-elevation",
          "evidence_id": "evidence-taboose-trailhead-elevation",
          "notes": "",
          "observation_id": "observation-taboose-trailhead-elevation",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "JMT Entry Points page 1, Taboose row: trailhead elevation 5,400 feet, under the approximate-for-planning heading.",
          "observation_id": "observation-taboose-trailhead-elevation",
          "observed_at": null,
          "observer": "Wayproof primary-source text, table and visual map review",
          "retrieved_at": "2026-10-06T21:40:00+00:00",
          "source_id": "source-taboose-entry-guide"
        }
      ],
      "sources": [
        {
          "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/inyo/JMT%20TripPlan%20Entry%20Points.pdf",
          "publisher": "USDA Forest Service, Inyo National Forest",
          "source_id": "source-taboose-entry-guide"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "trailhead-taboose-pass",
      "kind": "trailhead",
      "name": "Taboose Pass Trailhead"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20261006-taboose-pass-corridor",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-taboose-trailhead-elevation.json",
      "reason": "Add authoritative Taboose access-to-pass planning coverage with preserved uncertainty.",
      "record_id": "observation-taboose-trailhead-elevation",
      "record_type": "observation",
      "summary": "Add Taboose Pass road/trail topology, official display geometry, jurisdiction-specific planning evidence, permits, facilities, restrictions and rechecks."
    }
  ],
  "navigation": {
    "next_id": "observation-taboose-trailhead-lockers",
    "position": 1234,
    "previous_id": "observation-taboose-trailhead-display-point",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "JMT Entry Points page 1, Taboose row: trailhead elevation 5,400 feet, under the approximate-for-planning heading.",
      "observation_id": "observation-taboose-trailhead-elevation",
      "observed_at": null,
      "observer": "Wayproof primary-source text, table and visual map review",
      "retrieved_at": "2026-10-06T21:40:00+00:00",
      "source_id": "source-taboose-entry-guide"
    }
  ],
  "record": {
    "artifact_refs": [],
    "content": "JMT Entry Points page 1, Taboose row: trailhead elevation 5,400 feet, under the approximate-for-planning heading.",
    "observation_id": "observation-taboose-trailhead-elevation",
    "observed_at": null,
    "observer": "Wayproof primary-source text, table and visual map review",
    "retrieved_at": "2026-10-06T21:40:00+00:00",
    "source_id": "source-taboose-entry-guide"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/inyo/JMT%20TripPlan%20Entry%20Points.pdf",
      "publisher": "USDA Forest Service, Inyo National Forest",
      "source_id": "source-taboose-entry-guide"
    }
  ]
}