{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-trailhead-lundy-canyon-map-point",
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        ],
        "predicate": "reviewed_access_point_coordinate",
        "spatial_scope_ids": [],
        "subject_id": "trailhead-lundy-canyon",
        "temporal_scope": null,
        "value": {
          "geometry_snapshot": {
            "feature_id": "trailhead-lundy-canyon",
            "path": "geometry/v0/snapshots/eastern-sierra-trailhead-points-20260925.geojson",
            "sha256": "ea8e63ced14acdff52ace60f067deef10538830e224e1e853be069f8aba74968"
          },
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          "longitude": -119.26182901097219,
          "navigation_grade": false,
          "provenance": "reviewed_usgs_route_endpoint_corroborated_by_osm",
          "source_feature_id": "{5B21FCE1-DB4A-4F9B-9A35-0D8E6F262D22}",
          "source_ids": [
            "source-usgs-national-digital-trails-eastern-sierra-20260924",
            "source-osm-nominatim-eastern-sierra-trailheads-20260925"
          ]
        }
      },
      "evidence": [
        {
          "claim_id": "claim-trailhead-lundy-canyon-map-point",
          "evidence_id": "evidence-trailhead-lundy-canyon-map-point-usgs-eastern-sierra-trailhead-endpoints-20260925",
          "notes": "",
          "observation_id": "observation-usgs-eastern-sierra-trailhead-endpoints-20260925",
          "stance": "supports"
        },
        {
          "claim_id": "claim-trailhead-lundy-canyon-map-point",
          "evidence_id": "evidence-trailhead-lundy-canyon-map-point-osm-eastern-sierra-trailhead-points-20260925",
          "notes": "",
          "observation_id": "observation-osm-eastern-sierra-trailhead-points-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
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            "ea8e63ced14acdff52ace60f067deef10538830e224e1e853be069f8aba74968"
          ],
          "content": "Reviewed National Digital Trails features place evidenced route endpoints at the Parker Lake, McGee Creek, Tamarack Lakes, Mosquito Flat, North Lake, Sabrina Basin, South Lake, Yost/Fern, Upper Rock Creek/East Fork, and Lundy Canyon access identities. The Lundy endpoint is independently corroborated by a named OpenStreetMap trailhead point approximately ten meters away.",
          "observation_id": "observation-usgs-eastern-sierra-trailhead-endpoints-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T13:00:00+00:00",
          "source_id": "source-usgs-national-digital-trails-eastern-sierra-20260924"
        },
        {
          "artifact_refs": [
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            "ea8e63ced14acdff52ace60f067deef10538830e224e1e853be069f8aba74968"
          ],
          "content": "OpenStreetMap Nominatim returned named highway=trailhead nodes for Lundy Canyon Trailhead (node 3979042564) and Virginia Lakes Trailhead (node 8569451796). These community-mapped points are retained with ODbL provenance and are not represented as agency-published locations.",
          "observation_id": "observation-osm-eastern-sierra-trailhead-points-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T13:00:00+00:00",
          "source_id": "source-osm-nominatim-eastern-sierra-trailheads-20260925"
        }
      ],
      "sources": [
        {
          "locator": "https://partnerships.nationalmap.gov/arcgis/rest/services/USGSTrails/MapServer/0",
          "publisher": "U.S. Geological Survey / U.S. Forest Service",
          "source_id": "source-usgs-national-digital-trails-eastern-sierra-20260924"
        },
        {
          "locator": "https://nominatim.openstreetmap.org/",
          "publisher": "OpenStreetMap contributors",
          "source_id": "source-osm-nominatim-eastern-sierra-trailheads-20260925"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-trailhead-virginia-lakes-map-point",
        "evidence_ids": [
          "evidence-trailhead-virginia-lakes-map-point-osm-eastern-sierra-trailhead-points-20260925"
        ],
        "predicate": "reviewed_access_point_coordinate",
        "spatial_scope_ids": [],
        "subject_id": "trailhead-virginia-lakes",
        "temporal_scope": null,
        "value": {
          "geometry_snapshot": {
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            "path": "geometry/v0/snapshots/eastern-sierra-trailhead-points-20260925.geojson",
            "sha256": "ea8e63ced14acdff52ace60f067deef10538830e224e1e853be069f8aba74968"
          },
          "latitude": 38.0479559,
          "longitude": -119.2631632,
          "navigation_grade": false,
          "provenance": "openstreetmap_named_trailhead_point",
          "source_feature_id": "OpenStreetMap node 8569451796",
          "source_ids": [
            "source-osm-nominatim-eastern-sierra-trailheads-20260925"
          ]
        }
      },
      "evidence": [
        {
          "claim_id": "claim-trailhead-virginia-lakes-map-point",
          "evidence_id": "evidence-trailhead-virginia-lakes-map-point-osm-eastern-sierra-trailhead-points-20260925",
          "notes": "",
          "observation_id": "observation-osm-eastern-sierra-trailhead-points-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
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            "ea8e63ced14acdff52ace60f067deef10538830e224e1e853be069f8aba74968"
          ],
          "content": "OpenStreetMap Nominatim returned named highway=trailhead nodes for Lundy Canyon Trailhead (node 3979042564) and Virginia Lakes Trailhead (node 8569451796). These community-mapped points are retained with ODbL provenance and are not represented as agency-published locations.",
          "observation_id": "observation-osm-eastern-sierra-trailhead-points-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T13:00:00+00:00",
          "source_id": "source-osm-nominatim-eastern-sierra-trailheads-20260925"
        }
      ],
      "sources": [
        {
          "locator": "https://nominatim.openstreetmap.org/",
          "publisher": "OpenStreetMap contributors",
          "source_id": "source-osm-nominatim-eastern-sierra-trailheads-20260925"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "trailhead-lundy-canyon",
      "kind": "trailhead",
      "name": "Lundy Canyon Trailhead"
    },
    {
      "entity_id": "trailhead-virginia-lakes",
      "kind": "trailhead",
      "name": "Virginia Lakes Trailhead"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260925-eastern-sierra-trailhead-map-points",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-osm-eastern-sierra-trailhead-points-20260925.json",
      "reason": "Publish reviewed East Side access points without inferring access from proximity.",
      "record_id": "observation-osm-eastern-sierra-trailhead-points-20260925",
      "record_type": "observation",
      "summary": "Publish 13 evidenced East Side trail access points and preserve three unresolved connector or identity questions."
    }
  ],
  "navigation": {
    "next_id": "observation-peakbagger-mount-whitney-20260923",
    "position": 950,
    "previous_id": "observation-ohlone-map-route-graph-pilot",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [
        "geometry/v0/snapshots/eastern-sierra-trailhead-points-20260925.geojson",
        "ea8e63ced14acdff52ace60f067deef10538830e224e1e853be069f8aba74968"
      ],
      "content": "OpenStreetMap Nominatim returned named highway=trailhead nodes for Lundy Canyon Trailhead (node 3979042564) and Virginia Lakes Trailhead (node 8569451796). These community-mapped points are retained with ODbL provenance and are not represented as agency-published locations.",
      "observation_id": "observation-osm-eastern-sierra-trailhead-points-20260925",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-25T13:00:00+00:00",
      "source_id": "source-osm-nominatim-eastern-sierra-trailheads-20260925"
    }
  ],
  "record": {
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      "ea8e63ced14acdff52ace60f067deef10538830e224e1e853be069f8aba74968"
    ],
    "content": "OpenStreetMap Nominatim returned named highway=trailhead nodes for Lundy Canyon Trailhead (node 3979042564) and Virginia Lakes Trailhead (node 8569451796). These community-mapped points are retained with ODbL provenance and are not represented as agency-published locations.",
    "observation_id": "observation-osm-eastern-sierra-trailhead-points-20260925",
    "observed_at": null,
    "observer": "",
    "retrieved_at": "2026-09-25T13:00:00+00:00",
    "source_id": "source-osm-nominatim-eastern-sierra-trailheads-20260925"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://nominatim.openstreetmap.org/",
      "publisher": "OpenStreetMap contributors",
      "source_id": "source-osm-nominatim-eastern-sierra-trailheads-20260925"
    }
  ]
}