{
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    {
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        ],
        "predicate": "source_profile_variation",
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        "subject_id": "route-cinder-cone-trail",
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          "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",
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        },
        {
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          "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.",
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        },
        {
          "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",
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        },
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          "publisher": "National Park Service",
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        }
      ]
    },
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          "source_load_date": "2019-12-10T07:53:56.000",
          "source_mode_attributes": {
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        {
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          "evidence_id": "evidence-route-segment-cinder-base-fork-summit-nps-geometry",
          "notes": "",
          "observation_id": "observation-nps-public-trails-cinder-cone-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.",
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          "observer": "",
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          ],
          "content": "The NPS Public Trails FeatureServer returned one exact endpoint-matched public trail LineString for each of the three already-published Cinder Cone summit approach segments. All three are identified as existing trails. Mapping method, map source, source date, and XY accuracy are unknown for these features; the geometry is planning evidence and is not represented as navigation-grade.",
          "observation_id": "observation-nps-public-trails-cinder-cone-20260923",
          "observed_at": null,
          "observer": "Wayproof official geometry service review",
          "retrieved_at": "2026-09-23T17:30:00+00:00",
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          "publisher": "National Park Service",
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      ]
    },
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            "pack_saddle": "Yes"
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          "notes": "",
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          "observation_id": "observation-nps-public-trails-cinder-cone-20260923",
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        }
      ],
      "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.",
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          ],
          "content": "The NPS Public Trails FeatureServer returned one exact endpoint-matched public trail LineString for each of the three already-published Cinder Cone summit approach segments. All three are identified as existing trails. Mapping method, map source, source date, and XY accuracy are unknown for these features; the geometry is planning evidence and is not represented as navigation-grade.",
          "observation_id": "observation-nps-public-trails-cinder-cone-20260923",
          "observed_at": null,
          "observer": "Wayproof official geometry service review",
          "retrieved_at": "2026-09-23T17:30:00+00:00",
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        },
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          "publisher": "National Park Service",
          "source_id": "source-nps-public-trails-feature-service"
        }
      ]
    },
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          "evidence_id": "evidence-cinder-trailhead-nobles-junction",
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        },
        {
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          "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.",
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        },
        {
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          ],
          "content": "The NPS Public Trails FeatureServer returned one exact endpoint-matched public trail LineString for each of the three already-published Cinder Cone summit approach segments. All three are identified as existing trails. Mapping method, map source, source date, and XY accuracy are unknown for these features; the geometry is planning evidence and is not represented as navigation-grade.",
          "observation_id": "observation-nps-public-trails-cinder-cone-20260923",
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          "observer": "Wayproof official geometry service review",
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      ],
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          "publisher": "U.S. Geological Survey",
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        },
        {
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      ]
    }
  ],
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    {
      "entity_id": "route-cinder-cone-trail",
      "kind": "route",
      "name": "Cinder Cone Trail"
    },
    {
      "entity_id": "route-segment-cinder-base-fork-summit",
      "kind": "route_segment",
      "name": "Cinder Cone base fork to summit approach"
    },
    {
      "entity_id": "route-segment-cinder-nobles-junction-base-fork",
      "kind": "route_segment",
      "name": "Nobles and Butte Lake junction to Cinder Cone base fork"
    },
    {
      "entity_id": "route-segment-cinder-trailhead-nobles-junction",
      "kind": "route_segment",
      "name": "Cinder Cone trailhead to Nobles and Butte Lake junction"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260923-lassen-cinder-cone-route-graph",
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        "evidence-cinder-cone-route-detail",
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      ],
      "knowledge_gap_refs": [
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      ],
      "path": "canonical/v0/observations/observation-usgs-topo-vector-cinder-cone-trails-20250729-20260923.json",
      "reason": "Publish the official distance-bearing Butte Lake-to-Cinder Cone summit approach while preserving unresolved rim and crater branch roles.",
      "record_id": "observation-usgs-topo-vector-cinder-cone-trails-20250729-20260923",
      "record_type": "observation",
      "summary": "Add the exact official Cinder Cone summit approach with trailhead geometry and explicit rim/crater uncertainty."
    }
  ],
  "navigation": {
    "next_id": "observation-usgs-topo-vector-lassen-trails-20250729-20260923",
    "position": 1316,
    "previous_id": "observation-usgs-topo-vector-bumpass-trails-20250729-20260923",
    "total": 1318
  },
  "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.",
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      "source_id": "source-usgs-topo-vector-prospect-peak-20250729"
    }
  ],
  "record": {
    "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.",
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}