{
  "answerability": "evidence_backed_claims_available",
  "claims": [
    {
      "claim": {
        "claim_id": "claim-emigrant-western-south-chewing-topology",
        "evidence_ids": [
          "evidence-emigrant-western-south-chewing-topology"
        ],
        "predicate": "mapped_route_connector",
        "spatial_scope_ids": [
          "scope-route-emigrant-crabtree-chewing-gum-lake"
        ],
        "subject_id": "route-segment-emigrant-western-south-chewing",
        "temporal_scope": null,
        "value": {
          "distance_miles": null,
          "distance_status": "not_printed",
          "end_node_id": "route-node-emigrant-chewing-west-approach",
          "route_role": "official_mainline",
          "start_node_id": "route-node-emigrant-lake-valley-display-break",
          "support": "19E21 continues northeast to the west-side system trail at Chewing Gum Lake"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-emigrant-western-south-chewing-topology",
          "evidence_id": "evidence-emigrant-western-south-chewing-topology",
          "notes": "",
          "observation_id": "observation-emigrant-western-south-chewing-topology",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "2010 overview western panel, corroborated by lake detail maps and named USFS trail features: 19E21 continues northeast to the west-side system trail at Chewing Gum Lake. Segmentation at source breaks and chosen trail approach vertices is descriptive, not a claim of an official named junction. No atomic mileage assigned from cumulative reports or GIS lengths.",
          "observation_id": "observation-emigrant-western-south-chewing-topology",
          "observed_at": null,
          "observer": "Wayproof primary-source text, georeferenced map and named-feature review",
          "retrieved_at": "2026-10-06T07:44:34+00:00",
          "source_id": "source-usfs-emigrant-overview-map"
        }
      ],
      "sources": [
        {
          "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/stanislaus/Emigrant%20Wilderness%20GEOSPATIAL.pdf",
          "publisher": "USDA Forest Service, Stanislaus National Forest",
          "source_id": "source-usfs-emigrant-overview-map"
        }
      ],
      "subject": {
        "entity_id": "route-segment-emigrant-western-south-chewing",
        "kind": "route_segment",
        "name": "South Chewing"
      }
    },
    {
      "claim": {
        "claim_id": "claim-emigrant-western-south-chewing-geometry",
        "evidence_ids": [
          "evidence-emigrant-western-south-chewing-geometry"
        ],
        "predicate": "reviewed_route_display_geometry",
        "spatial_scope_ids": [
          "scope-route-emigrant-crabtree-chewing-gum-lake"
        ],
        "subject_id": "route-segment-emigrant-western-south-chewing",
        "temporal_scope": null,
        "value": {
          "coordinate_reference_system": "EPSG:4326",
          "current_route_status": "unknown; pre-trip check required",
          "end_coordinate": {
            "latitude": 38.1944391159321,
            "longitude": -119.85209028794463
          },
          "geometry_snapshot": {
            "feature_id": "usfs-emigrant-western-south-chewing",
            "path": "geometry/v0/snapshots/usfs-emigrant-western-routes-20261006.geojson",
            "sha256": "5cca60fe36da261b084bbd7b258964fee57c6b6a4f02edb166dad0acd7bb71ee"
          },
          "navigation_grade": false,
          "route_role": "official_mainline",
          "source_coordinate_accuracy": "unknown",
          "source_feature_id": 9429539,
          "source_globalid": "{462C358A-F41E-4870-8D43-46F953769424}",
          "source_vertex_range_inclusive": [
            0,
            200
          ],
          "start_coordinate": {
            "latitude": 38.185659067986265,
            "longitude": -119.88123033763796
          }
        }
      },
      "evidence": [
        {
          "claim_id": "claim-emigrant-western-south-chewing-geometry",
          "evidence_id": "evidence-emigrant-western-south-chewing-geometry",
          "notes": "",
          "observation_id": "observation-emigrant-western-south-chewing-geometry",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "USFS National Forest System Trails feature 9429539, globalid {462C358A-F41E-4870-8D43-46F953769424}, 19E21 LAKE VALLEY: reviewed inclusive normalized source vertices 0 through 200. Matched against official trail maps; source lengths describe the entire original feature. No coordinate is snapped and no mileage is computed.",
          "observation_id": "observation-emigrant-western-south-chewing-geometry",
          "observed_at": null,
          "observer": "Wayproof primary-source text, georeferenced map and named-feature review",
          "retrieved_at": "2026-10-06T00:09:34+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"
        }
      ],
      "subject": {
        "entity_id": "route-segment-emigrant-western-south-chewing",
        "kind": "route_segment",
        "name": "South Chewing"
      }
    }
  ],
  "entity": {
    "entity_id": "route-segment-emigrant-western-south-chewing",
    "kind": "route_segment",
    "name": "South Chewing"
  },
  "gap_details": [],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20261006-emigrant-western-coverage",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/entities/route-segment-emigrant-western-south-chewing.json",
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      "record_type": "entity",
      "summary": "Add six drawable western Emigrant approaches with shared physical segments, lake camping evidence and historical trailhead facilities."
    },
    {
      "action": "ADD",
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      "knowledge_gap_refs": [],
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    },
    {
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      "knowledge_gap_refs": [],
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      "record_id": "claim-emigrant-western-south-chewing-geometry",
      "record_type": "claim",
      "summary": "Add six drawable western Emigrant approaches with shared physical segments, lake camping evidence and historical trailhead facilities."
    }
  ],
  "journey": [],
  "knowledge_gaps": [],
  "reference_evidence": [],
  "relationships": [
    {
      "evidence_ids": [
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        "evidence-emigrant-western-south-chewing-geometry"
      ],
      "object_id": "route-node-emigrant-chewing-west-approach",
      "predicate": "ends_at",
      "relationship_id": "relationship-emigrant-western-south-chewing-end",
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    },
    {
      "evidence_ids": [
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      "object_id": "route-emigrant-crabtree-chewing-gum-lake",
      "predicate": "part_of",
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    {
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        "evidence-emigrant-western-south-chewing-geometry"
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      "predicate": "provides_access_to",
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    },
    {
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      ],
      "object_id": "route-node-emigrant-lake-valley-display-break",
      "predicate": "starts_at",
      "relationship_id": "relationship-emigrant-western-south-chewing-start",
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      "temporal_scope": null
    }
  ],
  "route_geometry": null,
  "route_geometry_url": null,
  "type": "canonical_entity"
}