{
  "answerability": "evidence_backed_claims_available",
  "claims": [
    {
      "claim": {
        "claim_id": "claim-trailhead-parker-lake-map-point",
        "evidence_ids": [
          "evidence-trailhead-parker-lake-map-point-usgs-eastern-sierra-trailhead-endpoints-20260925"
        ],
        "predicate": "reviewed_access_point_coordinate",
        "spatial_scope_ids": [],
        "subject_id": "trailhead-parker-lake",
        "temporal_scope": null,
        "value": {
          "geometry_snapshot": {
            "feature_id": "trailhead-parker-lake",
            "path": "geometry/v0/snapshots/eastern-sierra-trailhead-points-20260925.geojson",
            "sha256": "ea8e63ced14acdff52ace60f067deef10538830e224e1e853be069f8aba74968"
          },
          "latitude": 37.852948730598385,
          "longitude": -119.13461999660952,
          "navigation_grade": false,
          "provenance": "reviewed_usgs_route_endpoint",
          "source_feature_id": "{1B40EDAF-4E02-474B-9F7B-483B78F5905F}",
          "source_ids": [
            "source-usgs-national-digital-trails-eastern-sierra-20260924"
          ]
        }
      },
      "evidence": [
        {
          "claim_id": "claim-trailhead-parker-lake-map-point",
          "evidence_id": "evidence-trailhead-parker-lake-map-point-usgs-eastern-sierra-trailhead-endpoints-20260925",
          "notes": "",
          "observation_id": "observation-usgs-eastern-sierra-trailhead-endpoints-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "geometry/v0/snapshots/eastern-sierra-trailhead-points-20260925.geojson",
            "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"
        }
      ],
      "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"
        }
      ],
      "subject": {
        "entity_id": "trailhead-parker-lake",
        "kind": "trailhead",
        "name": "Parker Lake Trailhead"
      }
    }
  ],
  "entity": {
    "entity_id": "trailhead-parker-lake",
    "kind": "trailhead",
    "name": "Parker Lake Trailhead"
  },
  "gap_details": [],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260923-eastern-sierra-foliage-hikes",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/entities/trailhead-parker-lake.json",
      "reason": "Publish a source-backed access and route foundation for Eastern Sierra fall-foliage day-hike alternatives near East Fork Campground.",
      "record_id": "trailhead-parker-lake",
      "record_type": "entity",
      "summary": "Add source-backed Eastern Sierra foliage-hike trailheads, managing areas, route associations, published distances and hazards, plus explicit research and pre-trip gaps."
    },
    {
      "action": "ADD",
      "change_set_id": "wp-20260925-eastern-sierra-trailhead-map-points",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/claims/claim-trailhead-parker-lake-map-point.json",
      "reason": "Publish reviewed East Side access points without inferring access from proximity.",
      "record_id": "claim-trailhead-parker-lake-map-point",
      "record_type": "claim",
      "summary": "Publish 13 evidenced East Side trail access points and preserve three unresolved connector or identity questions."
    }
  ],
  "journey": [],
  "knowledge_gaps": [],
  "reference_evidence": [],
  "relationships": [
    {
      "evidence_ids": [
        "evidence-parker-lake-route-profile"
      ],
      "object_id": "route-parker-lake",
      "predicate": "accesses",
      "relationship_id": "relationship-parker-trailhead-accesses-route",
      "subject_id": "trailhead-parker-lake",
      "temporal_scope": null
    },
    {
      "evidence_ids": [
        "evidence-june-lakes-wilderness-context"
      ],
      "object_id": "trailhead-parker-lake",
      "predicate": "manages",
      "relationship_id": "relationship-inyo-manages-parker-trailhead",
      "subject_id": "agency-inyo-national-forest",
      "temporal_scope": null
    },
    {
      "evidence_ids": [
        "evidence-route-parker-lake-dataset-profile"
      ],
      "object_id": "trailhead-parker-lake",
      "predicate": "starts_at",
      "relationship_id": "relationship-route-parker-lake-starts-at-dataset-entry",
      "subject_id": "route-parker-lake",
      "temporal_scope": null
    },
    {
      "evidence_ids": [
        "evidence-route-segment-parker-lake-01"
      ],
      "object_id": "trailhead-parker-lake",
      "predicate": "starts_at",
      "relationship_id": "relationship-route-segment-parker-lake-01-starts-at",
      "subject_id": "route-segment-parker-lake-01",
      "temporal_scope": null
    }
  ],
  "route_geometry": null,
  "route_geometry_url": null,
  "type": "canonical_entity"
}