{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-cinder-cone-source-profile-variation",
        "evidence_ids": [
          "evidence-cinder-cone-source-profile-variation",
          "evidence-cinder-cone-source-profile-variation-nps"
        ],
        "predicate": "source_profile_variation",
        "spatial_scope_ids": [
          "scope-route-cinder-cone-trail"
        ],
        "subject_id": "route-cinder-cone-trail",
        "temporal_scope": null,
        "value": {
          "dataset_approach_to_base_miles": 1.24854719,
          "dataset_out_and_back_miles": 3.1659347,
          "dataset_trailhead_to_summit_approach_miles": 1.58296735,
          "nps_published_base_one_way_miles": 1.2,
          "nps_published_summit_round_trip_miles": 4,
          "resolution": "preserve both; do not infer which rim or crater circulation accounts for the difference"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-cinder-cone-source-profile-variation",
          "evidence_id": "evidence-cinder-cone-source-profile-variation",
          "notes": "",
          "observation_id": "observation-usgs-topo-vector-cinder-cone-trails-20250729-20260923",
          "stance": "supports"
        },
        {
          "claim_id": "claim-cinder-cone-source-profile-variation",
          "evidence_id": "evidence-cinder-cone-source-profile-variation-nps",
          "notes": "",
          "observation_id": "observation-nps-lassen-cinder-cone-place-20260923",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "The official USGS Topo Vector trail layer connects the NPS Cinder Cone trailhead coordinate to the cone base with one Nobles Emigrant Trail feature and one Butte Lake To Snag Lake Trail feature, then connects the base to the summit approach with one Cinder Cone Trail feature. Twenty-two additional Cinder Cone Trail features form branched rim, crater, and other-side topology whose visitor roles are not uniquely named in the dataset. Dataset publication warns that temporal changes may have occurred.",
          "observation_id": "observation-usgs-topo-vector-cinder-cone-trails-20250729-20260923",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-23T16:00:00+00:00",
          "source_id": "source-usgs-topo-vector-prospect-peak-20250729"
        },
        {
          "artifact_refs": [],
          "content": "NPS describes a 2.4-mile round trip to the cone base and a four-mile round trip to the summit. At 1.2 miles the trail reaches a fork at the base; hikers take the left/south trail, circle toward the south side, and continue to the top. An additional separate trail continues into the crater. The trailhead is near the Butte Lake boat ramp, and current access and trail conditions require recheck.",
          "observation_id": "observation-nps-lassen-cinder-cone-place-20260923",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-23T16:00:00+00:00",
          "source_id": "source-nps-lassen-cinder-cone-place"
        }
      ],
      "sources": [
        {
          "locator": "https://prd-tnm.s3.amazonaws.com/StagedProducts/TopoMapVector/CA/GPKG/VECTOR_Prospect_Peak_CA_7_5_Min_GPKG.zip",
          "publisher": "U.S. Geological Survey",
          "source_id": "source-usgs-topo-vector-prospect-peak-20250729"
        },
        {
          "locator": "https://www.nps.gov/places/cinder_cone.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-lassen-cinder-cone-place"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "route-cinder-cone-trail",
      "kind": "route",
      "name": "Cinder Cone Trail"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260923-lassen-cinder-cone-route-graph",
      "evidence_refs": [
        "evidence-cinder-trailhead-nobles-junction",
        "evidence-cinder-nobles-junction-base-fork",
        "evidence-cinder-base-fork-summit",
        "evidence-cinder-cone-official-trailhead-coordinate",
        "evidence-cinder-cone-route-detail",
        "evidence-cinder-cone-source-profile-variation",
        "evidence-cinder-cone-source-profile-variation-nps"
      ],
      "knowledge_gap_refs": [
        "gap-lassen-cinder-rim-crater-circulation",
        "gap-lassen-cinder-source-profile-variation",
        "gap-lassen-specific-route-topology"
      ],
      "path": "canonical/v0/claims/claim-cinder-cone-source-profile-variation.json",
      "reason": "Publish the official distance-bearing Butte Lake-to-Cinder Cone summit approach while preserving unresolved rim and crater branch roles.",
      "record_id": "claim-cinder-cone-source-profile-variation",
      "record_type": "claim",
      "summary": "Add the exact official Cinder Cone summit approach with trailhead geometry and explicit rim/crater uncertainty."
    }
  ],
  "navigation": {
    "next_id": "claim-cinder-cone-trail-profile",
    "position": 79,
    "previous_id": "claim-cinder-cone-route-detail",
    "total": 3965
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "NPS describes a 2.4-mile round trip to the cone base and a four-mile round trip to the summit. At 1.2 miles the trail reaches a fork at the base; hikers take the left/south trail, circle toward the south side, and continue to the top. An additional separate trail continues into the crater. The trailhead is near the Butte Lake boat ramp, and current access and trail conditions require recheck.",
      "observation_id": "observation-nps-lassen-cinder-cone-place-20260923",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-23T16:00:00+00:00",
      "source_id": "source-nps-lassen-cinder-cone-place"
    },
    {
      "artifact_refs": [],
      "content": "The official USGS Topo Vector trail layer connects the NPS Cinder Cone trailhead coordinate to the cone base with one Nobles Emigrant Trail feature and one Butte Lake To Snag Lake Trail feature, then connects the base to the summit approach with one Cinder Cone Trail feature. Twenty-two additional Cinder Cone Trail features form branched rim, crater, and other-side topology whose visitor roles are not uniquely named in the dataset. Dataset publication warns that temporal changes may have occurred.",
      "observation_id": "observation-usgs-topo-vector-cinder-cone-trails-20250729-20260923",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-23T16:00:00+00:00",
      "source_id": "source-usgs-topo-vector-prospect-peak-20250729"
    }
  ],
  "record": {
    "claim_id": "claim-cinder-cone-source-profile-variation",
    "evidence_ids": [
      "evidence-cinder-cone-source-profile-variation",
      "evidence-cinder-cone-source-profile-variation-nps"
    ],
    "predicate": "source_profile_variation",
    "spatial_scope_ids": [
      "scope-route-cinder-cone-trail"
    ],
    "subject_id": "route-cinder-cone-trail",
    "temporal_scope": null,
    "value": {
      "dataset_approach_to_base_miles": 1.24854719,
      "dataset_out_and_back_miles": 3.1659347,
      "dataset_trailhead_to_summit_approach_miles": 1.58296735,
      "nps_published_base_one_way_miles": 1.2,
      "nps_published_summit_round_trip_miles": 4,
      "resolution": "preserve both; do not infer which rim or crater circulation accounts for the difference"
    }
  },
  "record_type": "claim",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.nps.gov/places/cinder_cone.htm",
      "publisher": "National Park Service",
      "source_id": "source-nps-lassen-cinder-cone-place"
    },
    {
      "locator": "https://prd-tnm.s3.amazonaws.com/StagedProducts/TopoMapVector/CA/GPKG/VECTOR_Prospect_Peak_CA_7_5_Min_GPKG.zip",
      "publisher": "U.S. Geological Survey",
      "source_id": "source-usgs-topo-vector-prospect-peak-20250729"
    }
  ]
}