{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.8733, -3.6267)",
 "slug": "discovered-lane-52-8733-3-6267",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.599543807864222,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 438.0,
   "end_distance_m": 440.0,
   "start_elevation_m": 223.58215858167762,
   "end_elevation_m": 224.0941494578349,
   "min_gradient_pct": -9.46520663819257
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.620211650273898,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 438.0,
   "end_distance_m": 441.0,
   "start_elevation_m": 223.58215858167762,
   "end_elevation_m": 224.32076493118583,
   "min_gradient_pct": -1.5484481456572514
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.781503821854244,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 436.0,
   "end_distance_m": 441.0,
   "start_elevation_m": 223.13168974009312,
   "end_elevation_m": 224.32076493118583,
   "min_gradient_pct": 1.5530230382205445
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.237875133708883,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 431.0,
   "end_distance_m": 441.0,
   "start_elevation_m": 221.99697741781495,
   "end_elevation_m": 224.32076493118583,
   "min_gradient_pct": 3.418165416371437
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.636666723454226,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 427.0,
   "end_distance_m": 447.0,
   "start_elevation_m": 221.12762694382002,
   "end_elevation_m": 225.65496028851086,
   "min_gradient_pct": 5.419251270120071
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.345538695362848,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 427.0,
   "end_distance_m": 452.0,
   "start_elevation_m": 221.12762694382002,
   "end_elevation_m": 226.71401161766073,
   "min_gradient_pct": 5.698528823517677
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.120144952052215,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 411.0,
   "end_distance_m": 461.0,
   "start_elevation_m": 218.2510176960657,
   "end_elevation_m": 228.3110901720918,
   "min_gradient_pct": 6.475483063828392
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.16374728444515,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 265.0,
   "end_distance_m": 365.0,
   "start_elevation_m": 196.08865716256662,
   "end_elevation_m": 213.25240444701177,
   "min_gradient_pct": 6.88999192232302
  }
 ],
 "shape": {
  "ascent_concentration": 0.337,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 199.0,
  "shape_class": "sustained"
 },
 "length_m": 477.00000000000125,
 "start_elevation_m": 169.31404739379911,
 "end_elevation_m": 229.2048691547366,
 "endpoint_gain_m": 59.890821760937484,
 "overall_gradient_pct": 12.55572783248162,
 "accumulated_ascent_m": 60.301601321574765,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.781503821854244,
   "start_distance_m": 436.0,
   "end_distance_m": 441.0,
   "midpoint_distance_m": 438.5,
   "start_elevation_m": 223.13168974009312,
   "end_elevation_m": 224.32076493118583,
   "start_xy": [
    290594.86848222686,
    331900.06849530106
   ],
   "end_xy": [
    290598.3603346295,
    331896.4898130298
   ]
  },
  "max_10m": {
   "gradient_pct": 23.237875133708883,
   "start_distance_m": 431.0,
   "end_distance_m": 441.0,
   "midpoint_distance_m": 436.0,
   "start_elevation_m": 221.99697741781495,
   "end_elevation_m": 224.32076493118583,
   "start_xy": [
    290591.3766298243,
    331903.64717757225
   ],
   "end_xy": [
    290598.3603346295,
    331896.4898130298
   ]
  },
  "max_20m": {
   "gradient_pct": 22.636666723454226,
   "start_distance_m": 427.0,
   "end_distance_m": 447.0,
   "midpoint_distance_m": 437.0,
   "start_elevation_m": 221.12762694382002,
   "end_elevation_m": 225.65496028851086,
   "start_xy": [
    290588.58314790216,
    331906.51012338925
   ],
   "end_xy": [
    290602.5505575126,
    331892.19539430435
   ]
  },
  "max_25m": {
   "gradient_pct": 22.345538695362848,
   "start_distance_m": 427.0,
   "end_distance_m": 452.0,
   "midpoint_distance_m": 439.5,
   "start_elevation_m": 221.12762694382002,
   "end_elevation_m": 226.71401161766073,
   "start_xy": [
    290588.58314790216,
    331906.51012338925
   ],
   "end_xy": [
    290606.50353866356,
    331889.20960080076
   ]
  },
  "max_50m": {
   "gradient_pct": 20.120144952052215,
   "start_distance_m": 411.0,
   "end_distance_m": 461.0,
   "midpoint_distance_m": 436.0,
   "start_elevation_m": 218.2510176960657,
   "end_elevation_m": 228.3110901720918,
   "start_xy": [
    290577.4092202138,
    331917.9619066572
   ],
   "end_xy": [
    290614.29418794863,
    331884.70340687275
   ]
  },
  "max_100m": {
   "gradient_pct": 17.16374728444515,
   "start_distance_m": 265.0,
   "end_distance_m": 365.0,
   "midpoint_distance_m": 315.0,
   "start_elevation_m": 196.08865716256662,
   "end_elevation_m": 213.25240444701177,
   "start_xy": [
    290466.4435211353,
    332012.07657255715
   ],
   "end_xy": [
    290545.28417810984,
    331950.8857835525
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.5530230382205445,
   "start_distance_m": 472.0,
   "end_distance_m": 477.0,
   "midpoint_distance_m": 474.5,
   "start_elevation_m": 229.12721800282557,
   "end_elevation_m": 229.2048691547366,
   "start_xy": [
    290624.9054197992,
    331882.4371048472
   ],
   "end_xy": [
    290629.6626572025,
    331883.8840966425
   ]
  },
  "min_10m": {
   "gradient_pct": 3.418165416371437,
   "start_distance_m": 467.0,
   "end_distance_m": 477.0,
   "midpoint_distance_m": 472.0,
   "start_elevation_m": 228.86305261309946,
   "end_elevation_m": 229.2048691547366,
   "start_xy": [
    290619.9438404673,
    331883.055757038
   ],
   "end_xy": [
    290629.6626572025,
    331883.8840966425
   ]
  },
  "min_20m": {
   "gradient_pct": 5.419251270120071,
   "start_distance_m": 54.0,
   "end_distance_m": 74.0,
   "midpoint_distance_m": 64.0,
   "start_elevation_m": 173.54832833481643,
   "end_elevation_m": 174.63217858884045,
   "start_xy": [
    290441.1444201919,
    332188.9424332019
   ],
   "end_xy": [
    290437.9462065708,
    332169.27508921345
   ]
  },
  "min_25m": {
   "gradient_pct": 5.698528823517677,
   "start_distance_m": 49.0,
   "end_distance_m": 74.0,
   "midpoint_distance_m": 61.5,
   "start_elevation_m": 173.20754638296103,
   "end_elevation_m": 174.63217858884045,
   "start_xy": [
    290440.98982366855,
    332193.92866327905
   ],
   "end_xy": [
    290437.9462065708,
    332169.27508921345
   ]
  },
  "min_50m": {
   "gradient_pct": 6.475483063828392,
   "start_distance_m": 51.0,
   "end_distance_m": 101.0,
   "midpoint_distance_m": 76.0,
   "start_elevation_m": 173.36731975168618,
   "end_elevation_m": 176.60506128360038,
   "start_xy": [
    290441.21269462345,
    332191.9416562016
   ],
   "end_xy": [
    290429.08987156284,
    332143.85551490233
   ]
  },
  "min_100m": {
   "gradient_pct": 6.88999192232302,
   "start_distance_m": 52.0,
   "end_distance_m": 152.0,
   "midpoint_distance_m": 102.0,
   "start_elevation_m": 173.42436450539566,
   "end_elevation_m": 180.31435642771868,
   "start_xy": [
    290441.1899364796,
    332190.9419152017
   ],
   "end_xy": [
    290412.63863849407,
    332095.6279736105
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.599543807864222,
   "start_distance_m": 438.0,
   "end_distance_m": 440.0,
   "midpoint_distance_m": 439.0,
   "start_elevation_m": 223.58215858167762,
   "end_elevation_m": 224.0941494578349,
   "start_xy": [
    290596.2652231879,
    331898.63702239253
   ],
   "end_xy": [
    290597.661964149,
    331897.20554948406
   ]
  },
  "max_3m": {
   "gradient_pct": 24.620211650273898,
   "start_distance_m": 438.0,
   "end_distance_m": 441.0,
   "midpoint_distance_m": 439.5,
   "start_elevation_m": 223.58215858167762,
   "end_elevation_m": 224.32076493118583,
   "start_xy": [
    290596.2652231879,
    331898.63702239253
   ],
   "end_xy": [
    290598.3603346295,
    331896.4898130298
   ]
  }
 },
 "diagnostic_note": "Windows <=3 m are at raster-noise scale (1-sigma raster noise alone is roughly +/-7 pp at 2 m and +/-5 pp at 3 m on a 1 m DTM). Diagnostic use only: never a headline or ranking value.",
 "quality_summary": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.05,
   "obstruction_max_height_m": 9.43,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "sample_interval_m": 1.0,
  "interpolation": "bilinear",
  "smoothing": "none",
  "gradient_windows_m": [
   5.0,
   10.0,
   20.0,
   25.0,
   50.0,
   100.0
  ],
  "diagnostic_windows_m": [
   2.0,
   3.0
  ],
  "elevation_crs": "EPSG:27700",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/wales/dtm_1m/wg_del_27_290331_20220301dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_27_290332_20220301dtm.tif"
  ],
  "calculated_at": "2026-09-05T06:02:24+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/wales-2026-08-11.osm.pbf",
  "osm_snapshot": "2026-08-10T20:21:40Z",
  "run_id": "summit-260905-summit-wales-wales-2026-08-11",
  "elevation_provider": "Welsh Government",
  "elevation_dataset": "Welsh Government LiDAR 1m DTM (2020-2023)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Crown copyright Welsh Government",
  "elevation_catalogue_layer": "geonode:welsh_government_lidar_tile_catalogue_2020_2023",
  "elevation_tile_ids": [
   "wg_del_27_290331_20220301dtm.tif",
   "wg_del_27_290332_20220301dtm.tif"
  ],
  "elevation_capture_dates": [
   "01-03-2022",
   "11-01-2022"
  ],
  "route_summit_trim_m": 66.8,
  "route_summit_trim_loss_m": 4.9,
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Llangower",
  "county": "Gwynedd - Gwynedd"
 }
}