{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-taboose-trailhead-display-point",
        "evidence_ids": [
          "evidence-taboose-trailhead-display-point"
        ],
        "predicate": "reviewed_display_coordinate",
        "spatial_scope_ids": [
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        ],
        "subject_id": "trailhead-taboose-pass",
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          "coordinate_reference_system": "EPSG:4326",
          "latitude": 37.009548972348696,
          "longitude": -118.32735760836171,
          "navigation_grade": false,
          "not_surveyed_facility_coordinate": true,
          "role": "endpoint of reviewed official trail feature chain",
          "source_coordinate_accuracy": "unknown"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-taboose-trailhead-display-point",
          "evidence_id": "evidence-taboose-trailhead-display-point",
          "notes": "",
          "observation_id": "observation-taboose-trailhead-display-point",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "USFS named 3304 chain trailhead endpoint matched against the Independence Area Trails map; retained unmodified as a display point, not a surveyed facility position.",
          "observation_id": "observation-taboose-trailhead-display-point",
          "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-usfs-emigrant-nfs-trail-geometry"
        }
      ],
      "sources": [
        {
          "locator": "https://apps.fs.usda.gov/arcx/rest/services/EDW/EDW_TrailNFSPublish_01/MapServer/0",
          "publisher": "USDA Forest Service",
          "source_id": "source-usfs-emigrant-nfs-trail-geometry"
        }
      ]
    }
  ],
  "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-display-point.json",
      "reason": "Add authoritative Taboose access-to-pass planning coverage with preserved uncertainty.",
      "record_id": "observation-taboose-trailhead-display-point",
      "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-elevation",
    "position": 1233,
    "previous_id": "observation-taboose-trail-topology",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "USFS named 3304 chain trailhead endpoint matched against the Independence Area Trails map; retained unmodified as a display point, not a surveyed facility position.",
      "observation_id": "observation-taboose-trailhead-display-point",
      "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-usfs-emigrant-nfs-trail-geometry"
    }
  ],
  "record": {
    "artifact_refs": [],
    "content": "USFS named 3304 chain trailhead endpoint matched against the Independence Area Trails map; retained unmodified as a display point, not a surveyed facility position.",
    "observation_id": "observation-taboose-trailhead-display-point",
    "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-usfs-emigrant-nfs-trail-geometry"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://apps.fs.usda.gov/arcx/rest/services/EDW/EDW_TrailNFSPublish_01/MapServer/0",
      "publisher": "USDA Forest Service",
      "source_id": "source-usfs-emigrant-nfs-trail-geometry"
    }
  ]
}