{
  "answerability": "evidence_backed_claims_available",
  "claims": [
    {
      "claim": {
        "claim_id": "claim-route-segment-gem-lakes-spur",
        "evidence_ids": [
          "evidence-route-segment-gem-lakes-spur"
        ],
        "predicate": "official_dataset_route_segment",
        "spatial_scope_ids": [
          "scope-route-gem-lakes-spur"
        ],
        "subject_id": "route-segment-gem-lakes-spur",
        "temporal_scope": null,
        "value": {
          "coordinate_reference_system": "EPSG:4269",
          "dataset_feature_id": "{177FA3E2-60B8-4E6E-985B-A307FDFB4EE0}",
          "dataset_feature_name": "GEM LAKES",
          "dataset_field": "lengthmiles",
          "distance_miles": 0.37391222,
          "distance_status": "known",
          "end_coordinate": {
            "latitude": 37.39111803050292,
            "longitude": -118.757378002147
          },
          "geometry_snapshot": {
            "feature_id": "{177FA3E2-60B8-4E6E-985B-A307FDFB4EE0}",
            "path": "geometry/v0/snapshots/usgs-rock-creek-route-extensions-20260924.geojson",
            "sha256": "3eb86c55a257e822f85226319612b375e7440019d56be5231b030415f138b471"
          },
          "route_role": "official_mainline",
          "source_data_description": "USFS Trails Update 03/2026",
          "source_dataset_id": "{8CC4DB36-D0BE-4189-88C7-64C3569EB754}",
          "source_edit_date": 1774742400000,
          "source_feature_id": "6815",
          "source_load_date": 1777310283000,
          "source_originator": "U.S. Forest Service",
          "start_coordinate": {
            "latitude": 37.39262871904225,
            "longitude": -118.7548742979842
          }
        }
      },
      "evidence": [
        {
          "claim_id": "claim-route-segment-gem-lakes-spur",
          "evidence_id": "evidence-route-segment-gem-lakes-spur",
          "notes": "",
          "observation_id": "observation-usgs-rock-creek-route-extensions-20260924",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "geometry/v0/snapshots/usgs-rock-creek-route-extensions-20260924.geojson",
            "3eb86c55a257e822f85226319612b375e7440019d56be5231b030415f138b471"
          ],
          "content": "A bounded National Digital Trails result contains nine contiguous Upper Rock Creek Canyon features plus named Chickenfoot Lake and Gem Lakes spurs. Eleven reviewed features and source-field lengths are retained without proximity snapping or inferred mainline cuts.",
          "observation_id": "observation-usgs-rock-creek-route-extensions-20260924",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-24T02:00:00+00:00",
          "source_id": "source-usgs-national-digital-trails-rock-creek-extensions-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-rock-creek-extensions-20260924"
        }
      ],
      "subject": {
        "entity_id": "route-segment-gem-lakes-spur",
        "kind": "route_segment",
        "name": "Gem Lakes segment"
      }
    },
    {
      "claim": {
        "claim_id": "claim-route-gem-lakes-spur-profile",
        "evidence_ids": [
          "evidence-route-gem-lakes-spur-profile"
        ],
        "predicate": "route_profile",
        "spatial_scope_ids": [
          "scope-route-gem-lakes-spur"
        ],
        "subject_id": "route-gem-lakes-spur",
        "temporal_scope": null,
        "value": {
          "bidirectional": true,
          "distance_basis": "USGS source-field lengthmiles",
          "distance_status": "known",
          "mainline_junction_mileage_status": "unknown",
          "one_way_distance_miles": 0.37391222,
          "route_role": "named side spur"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-route-gem-lakes-spur-profile",
          "evidence_id": "evidence-route-gem-lakes-spur-profile",
          "notes": "",
          "observation_id": "observation-usgs-rock-creek-route-extensions-20260924",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "geometry/v0/snapshots/usgs-rock-creek-route-extensions-20260924.geojson",
            "3eb86c55a257e822f85226319612b375e7440019d56be5231b030415f138b471"
          ],
          "content": "A bounded National Digital Trails result contains nine contiguous Upper Rock Creek Canyon features plus named Chickenfoot Lake and Gem Lakes spurs. Eleven reviewed features and source-field lengths are retained without proximity snapping or inferred mainline cuts.",
          "observation_id": "observation-usgs-rock-creek-route-extensions-20260924",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-24T02:00:00+00:00",
          "source_id": "source-usgs-national-digital-trails-rock-creek-extensions-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-rock-creek-extensions-20260924"
        }
      ],
      "subject": {
        "entity_id": "route-gem-lakes-spur",
        "kind": "route",
        "name": "Gem Lakes Spur"
      }
    }
  ],
  "entity": {
    "entity_id": "route-gem-lakes-spur",
    "kind": "route",
    "name": "Gem Lakes Spur"
  },
  "gap_details": [
    {
      "claims": [],
      "entities": [
        {
          "entity_id": "route-chickenfoot-lake-spur",
          "kind": "route",
          "name": "Chickenfoot Lake Spur"
        },
        {
          "entity_id": "route-gem-lakes-spur",
          "kind": "route",
          "name": "Gem Lakes Spur"
        },
        {
          "entity_id": "route-little-lakes-valley",
          "kind": "route",
          "name": "Little Lakes Valley Trail"
        }
      ],
      "history": [
        {
          "action": "ADD",
          "change_set_id": "wp-20260923-rock-creek-corridor-principal-routes",
          "evidence_refs": [],
          "knowledge_gap_refs": [],
          "path": "canonical/v0/gaps/gap-rock-creek-gem-chickenfoot-spur-connectors.json",
          "reason": "Publish the official Rock Creek corridor, principal distance-bearing hiking topology, reviewed geometry, and Mosquito Flat overnight-permit boundary.",
          "record_id": "gap-rock-creek-gem-chickenfoot-spur-connectors",
          "record_type": "gap",
          "summary": "Add the Rock Creek developed corridor, five principal bidirectional hiking routes with reviewed GeoJSON, Mosquito Flat access, overnight permit and food-storage requirements, and explicit unresolved spur/current-condition gaps."
        },
        {
          "action": "REPLACE",
          "change_set_id": "wp-20260924-rock-creek-route-and-summit-depth",
          "evidence_refs": [],
          "knowledge_gap_refs": [],
          "path": "canonical/v0/gaps/gap-rock-creek-gem-chickenfoot-spur-connectors.json",
          "reason": "Add source-backed Upper Rock Creek topology, measured Little Lakes spurs, and planning-grade summit approaches.",
          "record_id": "gap-rock-creek-gem-chickenfoot-spur-connectors",
          "record_type": "gap",
          "summary": "Add the nine-segment Upper Rock Creek Canyon graph, source-measured Chickenfoot and Gem spurs without inferred mainline cuts, and qualified summit approach profiles for five nearby peaks."
        }
      ],
      "navigation": {
        "next_id": "gap-rock-creek-little-lakes-intermediate-mileages",
        "position": 243,
        "previous_id": "gap-reserveamerica-sunol-site-water-restroom-proximity",
        "total": 299
      },
      "observations": [],
      "record": {
        "gap_id": "gap-rock-creek-gem-chickenfoot-spur-connectors",
        "question": "At what source-published mileage does each named Chickenfoot and Gem spur leave the Little Lakes mainline?",
        "reason": "Official sources establish the spur identities and lengths, but the spur and mainline features do not share exact endpoints and no source publishes their mileage positions along the unsplit 3.104216-mile mainline. The graph therefore preserves branches_from context without proximity-snapping a traversable junction.",
        "related_ids": [
          "route-little-lakes-valley",
          "route-chickenfoot-lake-spur",
          "route-gem-lakes-spur"
        ]
      },
      "record_type": "gap",
      "related_records": [
        {
          "record": {
            "entity_id": "route-little-lakes-valley",
            "kind": "route",
            "name": "Little Lakes Valley Trail"
          },
          "record_id": "route-little-lakes-valley",
          "record_type": "entity"
        },
        {
          "record": {
            "entity_id": "route-chickenfoot-lake-spur",
            "kind": "route",
            "name": "Chickenfoot Lake Spur"
          },
          "record_id": "route-chickenfoot-lake-spur",
          "record_type": "entity"
        },
        {
          "record": {
            "entity_id": "route-gem-lakes-spur",
            "kind": "route",
            "name": "Gem Lakes Spur"
          },
          "record_id": "route-gem-lakes-spur",
          "record_type": "entity"
        }
      ],
      "sources": []
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260924-rock-creek-route-and-summit-depth",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/entities/route-gem-lakes-spur.json",
      "reason": "Add source-backed Upper Rock Creek topology, measured Little Lakes spurs, and planning-grade summit approaches.",
      "record_id": "route-gem-lakes-spur",
      "record_type": "entity",
      "summary": "Add the nine-segment Upper Rock Creek Canyon graph, source-measured Chickenfoot and Gem spurs without inferred mainline cuts, and qualified summit approach profiles for five nearby peaks."
    },
    {
      "action": "ADD",
      "change_set_id": "wp-20260924-rock-creek-route-and-summit-depth",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/claims/claim-route-segment-gem-lakes-spur.json",
      "reason": "Add source-backed Upper Rock Creek topology, measured Little Lakes spurs, and planning-grade summit approaches.",
      "record_id": "claim-route-segment-gem-lakes-spur",
      "record_type": "claim",
      "summary": "Add the nine-segment Upper Rock Creek Canyon graph, source-measured Chickenfoot and Gem spurs without inferred mainline cuts, and qualified summit approach profiles for five nearby peaks."
    },
    {
      "action": "ADD",
      "change_set_id": "wp-20260924-rock-creek-route-and-summit-depth",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/claims/claim-route-gem-lakes-spur-profile.json",
      "reason": "Add source-backed Upper Rock Creek topology, measured Little Lakes spurs, and planning-grade summit approaches.",
      "record_id": "claim-route-gem-lakes-spur-profile",
      "record_type": "claim",
      "summary": "Add the nine-segment Upper Rock Creek Canyon graph, source-measured Chickenfoot and Gem spurs without inferred mainline cuts, and qualified summit approach profiles for five nearby peaks."
    }
  ],
  "journey": [],
  "knowledge_gaps": [
    {
      "gap_id": "gap-rock-creek-gem-chickenfoot-spur-connectors",
      "question": "At what source-published mileage does each named Chickenfoot and Gem spur leave the Little Lakes mainline?",
      "reason": "Official sources establish the spur identities and lengths, but the spur and mainline features do not share exact endpoints and no source publishes their mileage positions along the unsplit 3.104216-mile mainline. The graph therefore preserves branches_from context without proximity-snapping a traversable junction.",
      "related_ids": [
        "route-little-lakes-valley",
        "route-chickenfoot-lake-spur",
        "route-gem-lakes-spur"
      ]
    }
  ],
  "reference_evidence": [],
  "relationships": [
    {
      "evidence_ids": [
        "evidence-route-segment-gem-lakes-spur"
      ],
      "object_id": "route-little-lakes-valley",
      "predicate": "branches_from",
      "relationship_id": "relationship-route-gem-lakes-spur-branches-from-little-lakes",
      "subject_id": "route-gem-lakes-spur",
      "temporal_scope": null
    },
    {
      "evidence_ids": [
        "evidence-route-segment-gem-lakes-spur"
      ],
      "object_id": "waterbody-gem-lakes-rock-creek",
      "predicate": "ends_at",
      "relationship_id": "relationship-route-gem-lakes-spur-ends-at",
      "subject_id": "route-gem-lakes-spur",
      "temporal_scope": null
    },
    {
      "evidence_ids": [
        "evidence-route-segment-gem-lakes-spur"
      ],
      "object_id": "route-gem-lakes-spur",
      "predicate": "part_of",
      "relationship_id": "relationship-route-segment-gem-lakes-spur-part-of-route-gem-lakes-spur",
      "subject_id": "route-segment-gem-lakes-spur",
      "temporal_scope": null
    },
    {
      "evidence_ids": [
        "evidence-route-segment-gem-lakes-spur"
      ],
      "object_id": "route-node-little-lakes-gem-junction",
      "predicate": "starts_at",
      "relationship_id": "relationship-route-gem-lakes-spur-starts-at",
      "subject_id": "route-gem-lakes-spur",
      "temporal_scope": null
    }
  ],
  "route_geometry": {
    "features": [
      {
        "geometry": {
          "coordinates": [
            [
              -118.7548742979842,
              37.39262871904225
            ],
            [
              -118.75489155944251,
              37.392596918000606
            ],
            [
              -118.75487048340091,
              37.392540900292374
            ],
            [
              -118.75487159902588,
              37.392498070084116
            ],
            [
              -118.75487246985921,
              37.39245975237583
            ],
            [
              -118.75485388340093,
              37.392419470084235
            ],
            [
              -118.75484284590095,
              37.39237006279262
            ],
            [
              -118.7548412781926,
              37.39231826487605
            ],
            [
              -118.7548386573593,
              37.392266477376154
            ],
            [
              -118.75483185840096,
              37.39221700966789
            ],
            [
              -118.75483917090094,
              37.392167331542964
            ],
            [
              -118.75481371569265,
              37.39212039091802
            ],
            [
              -118.75479198860938,
              37.39206663466814
            ],
            [
              -118.75478931569268,
              37.392012600293185
            ],
            [
              -118.75479187819269,
              37.39195622841828
            ],
            [
              -118.75480003756769,
              37.39189752529336
            ],
            [
              -118.75480872402602,
              37.391861348210114
            ],
            [
              -118.754811805276,
              37.39181172841853
            ],
            [
              -118.75480358965103,
              37.391762281543606
            ],
            [
              -118.7548638969426,
              37.391729841960284
            ],
            [
              -118.75487655110925,
              37.39168233675207
            ],
            [
              -118.75490650527587,
              37.391634580502114
            ],
            [
              -118.75493645110913,
              37.39158681904388
            ],
            [
              -118.7549386115258,
              37.39152820133563
            ],
            [
              -118.7549471740258,
              37.391471744044054
            ],
            [
              -118.75495891465079,
              37.39141523987746
            ],
            [
              -118.75495432090077,
              37.391354475294236
            ],
            [
              -118.75495623131741,
              37.3913003690443
            ],
            [
              -118.75496426465077,
              37.39126645341935
            ],
            [
              -118.75498055735909,
              37.391223397169426
            ],
            [
              -118.75500820840068,
              37.39119820341949
            ],
            [
              -118.75505312923394,
              37.391156981544555
            ],
            [
              -118.7550889500672,
              37.39113391800288
            ],
            [
              -118.75511559590052,
              37.39111099612796
            ],
            [
              -118.75513911360883,
              37.39109036591964
            ],
            [
              -118.75518876256706,
              37.39108512216967
            ],
            [
              -118.75524098340031,
              37.39108434925299
            ],
            [
              -118.75529301048357,
              37.39109033883631
            ],
            [
              -118.75534523860847,
              37.39108956487797
            ],
            [
              -118.75539760215008,
              37.39107977737797
            ],
            [
              -118.75545905006663,
              37.39108111904466
            ],
            [
              -118.75552562194156,
              37.391059857586356
            ],
            [
              -118.75558133964978,
              37.391027486753046
            ],
            [
              -118.75564201464971,
              37.39101081591974
            ],
            [
              -118.75570288444129,
              37.39098738154479
            ],
            [
              -118.7557549208995,
              37.39094830550317
            ],
            [
              -118.7557974792328,
              37.39091162633656
            ],
            [
              -118.75586042923271,
              37.39090168050325
            ],
            [
              -118.75591741985761,
              37.39087830446164
            ],
            [
              -118.75595914485757,
              37.390866421128294
            ],
            [
              -118.75600807298247,
              37.390845414878356
            ],
            [
              -118.75604867089908,
              37.39081552008673
            ],
            [
              -118.75608548131567,
              37.390774418003446
            ],
            [
              -118.75609945631567,
              37.390738162795174
            ],
            [
              -118.75611414277398,
              37.39070189092024
            ],
            [
              -118.7561598948572,
              37.39068093779525
            ],
            [
              -118.75619969902385,
              37.390662323211984
            ],
            [
              -118.7562397886071,
              37.39062567529538
            ],
            [
              -118.75629260839867,
              37.39062038987868
            ],
            [
              -118.75635990006526,
              37.3906148836287
            ],
            [
              -118.7563946563152,
              37.39059183571209
            ],
            [
              -118.7564197177735,
              37.39054640237879
            ],
            [
              -118.75645165214843,
              37.39052339717051
            ],
            [
              -118.75648715110674,
              37.39053188362885
            ],
            [
              -118.75651973339836,
              37.390551677378824
            ],
            [
              -118.75656650006493,
              37.390544227378825
            ],
            [
              -118.75659793027324,
              37.39051446904551
            ],
            [
              -118.75662600735649,
              37.39046222633726
            ],
            [
              -118.75667803860642,
              37.390423154462326
            ],
            [
              -118.75671232089803,
              37.39037983362908
            ],
            [
              -118.75676112610631,
              37.39033855237915
            ],
            [
              -118.75682162714787,
              37.39029935029589
            ],
            [
              -118.75685936777279,
              37.3902830180042
            ],
            [
              -118.75690316152276,
              37.39026885237922
            ],
            [
              -118.75693802298105,
              37.3902503117543
            ],
            [
              -118.75696350423101,
              37.39022289300431
            ],
            [
              -118.7569865646476,
              37.39019776696267
            ],
            [
              -118.75699746985595,
              37.39016605967106
            ],
            [
              -118.75701672402255,
              37.390113952379465
            ],
            [
              -118.75703639798087,
              37.39007985862952
            ],
            [
              -118.75706802402249,
              37.39004334196295
            ],
            [
              -118.75710884798076,
              37.39003822737959
            ],
            [
              -118.75715875839734,
              37.39004424821292
            ],
            [
              -118.7571919583973,
              37.3900753013379
            ],
            [
              -118.75723064589721,
              37.390099512796155
            ],
            [
              -118.75728937193884,
              37.390105402379504
            ],
            [
              -118.7573389667304,
              37.39009790550449
            ],
            [
              -118.75739519381364,
              37.39011735342115
            ],
            [
              -118.75745121152187,
              37.39012778779613
            ],
            [
              -118.75750524589682,
              37.3901292388378
            ],
            [
              -118.75754969902175,
              37.39017364404606
            ],
            [
              -118.75759699068834,
              37.39027884300424
            ],
            [
              -118.75762011464661,
              37.3903168055042
            ],
            [
              -118.75764740839656,
              37.390336682587474
            ],
            [
              -118.75766755214659,
              37.390367928420744
            ],
            [
              -118.75765679902156,
              37.39040638883739
            ],
            [
              -118.75769303652152,
              37.390446408628975
            ],
            [
              -118.75773447610482,
              37.39045255342063
            ],
            [
              -118.75778651881302,
              37.390474315920585
            ],
            [
              -118.75781980735468,
              37.39049410237891
            ],
            [
              -118.75785890110461,
              37.390520559670506
            ],
            [
              -118.75787228756292,
              37.39054965446212
            ],
            [
              -118.75784924485458,
              37.390590553420395
            ],
            [
              -118.75781697297964,
              37.390629332587025
            ],
            [
              -118.75775814797976,
              37.39067977946195
            ],
            [
              -118.75773463964646,
              37.390716176336866
            ],
            [
              -118.75771512089648,
              37.39075702321185
            ],
            [
              -118.75771585943818,
              37.390788557586745
            ],
            [
              -118.75774896047977,
              37.390815108628374
            ],
            [
              -118.75776128756308,
              37.39084421383666
            ],
            [
              -118.75776489902142,
              37.390877956544955
            ],
            [
              -118.7577426125631,
              37.39092110133657
            ],
            [
              -118.75769657714653,
              37.39096008987815
            ],
            [
              -118.75763859693825,
              37.39100150758645
            ],
            [
              -118.75759505631333,
              37.39101116487808
            ],
            [
              -118.75753626985511,
              37.39100302425311
            ],
            [
              -118.75749836985517,
              37.39101259821143
            ],
            [
              -118.75744351777189,
              37.391051712794706
            ],
            [
              -118.75739374485534,
              37.391081743002985
            ],
            [
              -118.757378002147,
              37.39111803050292
            ]
          ],
          "type": "LineString"
        },
        "properties": {
          "distance_miles": 0.37391222,
          "distance_status": "known",
          "end_node_id": "waterbody-gem-lakes-rock-creek",
          "route_id": "route-gem-lakes-spur",
          "route_role": "official_mainline",
          "segment_id": "route-segment-gem-lakes-spur",
          "sequence": 1,
          "source_feature_id": "{177FA3E2-60B8-4E6E-985B-A307FDFB4EE0}",
          "source_geometry_accuracy": null,
          "start_node_id": "route-node-little-lakes-gem-junction"
        },
        "type": "Feature"
      }
    ],
    "type": "FeatureCollection",
    "wayproof": {
      "distance_complete": true,
      "distance_miles": 0.37391222,
      "entry_id": "route-node-little-lakes-gem-junction",
      "exit_id": "waterbody-gem-lakes-rock-creek",
      "geometry_status": "reviewed_source_snapshot",
      "navigation_grade": false,
      "route_id": "route-gem-lakes-spur"
    }
  },
  "route_geometry_url": "/geometry/routes/route-gem-lakes-spur.geojson",
  "type": "canonical_entity"
}