{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.5954, -3.9201)",
 "slug": "discovered-lane-52-5954-3-9201",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.66701174906586,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 9.0,
   "end_distance_m": 11.0,
   "start_elevation_m": 21.677452135546265,
   "end_elevation_m": 22.37079237052758,
   "min_gradient_pct": -16.94027331934933
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.42761573724317,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 8.0,
   "end_distance_m": 11.0,
   "start_elevation_m": 21.427963898410287,
   "end_elevation_m": 22.37079237052758,
   "min_gradient_pct": -14.396274688150376
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.91128370355267,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 263.0,
   "end_distance_m": 268.0,
   "start_elevation_m": 59.19269729255504,
   "end_elevation_m": 60.58826147773267,
   "min_gradient_pct": -11.54998311777831
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.179057099329714,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 258.0,
   "end_distance_m": 268.0,
   "start_elevation_m": 57.8703557677997,
   "end_elevation_m": 60.58826147773267,
   "min_gradient_pct": -7.715796843682483
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.282702539556574,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 251.0,
   "end_distance_m": 271.0,
   "start_elevation_m": 56.23275451704112,
   "end_elevation_m": 61.28929502495244,
   "min_gradient_pct": -4.804802674391269
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.329004438424334,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 248.0,
   "end_distance_m": 273.0,
   "start_elevation_m": 55.6421519186316,
   "end_elevation_m": 61.72440302823768,
   "min_gradient_pct": -2.6635775975259435
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.638354567745168,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 227.0,
   "end_distance_m": 277.0,
   "start_elevation_m": 51.64434334132496,
   "end_elevation_m": 62.463520625197546,
   "min_gradient_pct": -0.3871619929006158
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.885902146005783,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 227.0,
   "end_distance_m": 327.0,
   "start_elevation_m": 51.64434334132496,
   "end_elevation_m": 69.53024548733075,
   "min_gradient_pct": 0.8438528342595362
  }
 ],
 "shape": {
  "ascent_concentration": 0.348,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 131.0,
  "shape_class": "sustained"
 },
 "length_m": 521.4858724412661,
 "start_elevation_m": 19.749411711122566,
 "end_elevation_m": 79.98780376719631,
 "endpoint_gain_m": 60.23839205607375,
 "overall_gradient_pct": 11.551298940098954,
 "accumulated_ascent_m": 61.61986028210994,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.91128370355267,
   "start_distance_m": 263.0,
   "end_distance_m": 268.0,
   "midpoint_distance_m": 265.5,
   "start_elevation_m": 59.19269729255504,
   "end_elevation_m": 60.58826147773267,
   "start_xy": [
    270086.429265918,
    301698.0894018875
   ],
   "end_xy": [
    270089.8847278895,
    301701.70323400357
   ]
  },
  "max_10m": {
   "gradient_pct": 27.179057099329714,
   "start_distance_m": 258.0,
   "end_distance_m": 268.0,
   "midpoint_distance_m": 263.0,
   "start_elevation_m": 57.8703557677997,
   "end_elevation_m": 60.58826147773267,
   "start_xy": [
    270082.9738039464,
    301694.4755697714
   ],
   "end_xy": [
    270089.8847278895,
    301701.70323400357
   ]
  },
  "max_20m": {
   "gradient_pct": 25.282702539556574,
   "start_distance_m": 251.0,
   "end_distance_m": 271.0,
   "midpoint_distance_m": 261.0,
   "start_elevation_m": 56.23275451704112,
   "end_elevation_m": 61.28929502495244,
   "start_xy": [
    270078.35966828454,
    301689.2117971047
   ],
   "end_xy": [
    270091.9580050725,
    301703.8715332732
   ]
  },
  "max_25m": {
   "gradient_pct": 24.329004438424334,
   "start_distance_m": 248.0,
   "end_distance_m": 273.0,
   "midpoint_distance_m": 260.5,
   "start_elevation_m": 55.6421519186316,
   "end_elevation_m": 61.72440302823768,
   "start_xy": [
    270076.384739132,
    301686.95355556696
   ],
   "end_xy": [
    270093.3401898611,
    301705.31706611963
   ]
  },
  "max_50m": {
   "gradient_pct": 21.638354567745168,
   "start_distance_m": 227.0,
   "end_distance_m": 277.0,
   "midpoint_distance_m": 252.0,
   "start_elevation_m": 51.64434334132496,
   "end_elevation_m": 62.463520625197546,
   "start_xy": [
    270065.11487795156,
    301669.3309484453
   ],
   "end_xy": [
    270095.572757023,
    301708.6175133559
   ]
  },
  "max_100m": {
   "gradient_pct": 17.885902146005783,
   "start_distance_m": 227.0,
   "end_distance_m": 327.0,
   "midpoint_distance_m": 277.0,
   "start_elevation_m": 51.64434334132496,
   "end_elevation_m": 69.53024548733075,
   "start_xy": [
    270065.11487795156,
    301669.3309484453
   ],
   "end_xy": [
    270115.23789608903,
    301754.2548428892
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.54998311777831,
   "start_distance_m": 499.0,
   "end_distance_m": 504.0,
   "midpoint_distance_m": 501.5,
   "start_elevation_m": 80.89523530403775,
   "end_elevation_m": 80.31773614814884,
   "start_xy": [
    270207.5570644471,
    301898.8777145217
   ],
   "end_xy": [
    270210.27097639,
    301903.07708137477
   ]
  },
  "min_10m": {
   "gradient_pct": -7.715796843682483,
   "start_distance_m": 499.0,
   "end_distance_m": 509.0,
   "midpoint_distance_m": 504.0,
   "start_elevation_m": 80.89523530403775,
   "end_elevation_m": 80.1236556196695,
   "start_xy": [
    270207.5570644471,
    301898.8777145217
   ],
   "end_xy": [
    270212.98488833284,
    301907.2764482278
   ]
  },
  "min_20m": {
   "gradient_pct": -4.804802674391269,
   "start_distance_m": 498.0,
   "end_distance_m": 518.0,
   "midpoint_distance_m": 508.0,
   "start_elevation_m": 80.83810654147497,
   "end_elevation_m": 79.87714600659672,
   "start_xy": [
    270207.0142820585,
    301898.0378411511
   ],
   "end_xy": [
    270217.86992983,
    301914.83530856326
   ]
  },
  "min_25m": {
   "gradient_pct": -2.6635775975259435,
   "start_distance_m": 496.0,
   "end_distance_m": 521.0,
   "midpoint_distance_m": 508.5,
   "start_elevation_m": 80.65591650064414,
   "end_elevation_m": 79.99002210126265,
   "start_xy": [
    270205.9287172814,
    301896.3580944099
   ],
   "end_xy": [
    270219.4982769958,
    301917.35492867505
   ]
  },
  "min_50m": {
   "gradient_pct": -0.3871619929006158,
   "start_distance_m": 471.0,
   "end_distance_m": 521.0,
   "midpoint_distance_m": 496.0,
   "start_elevation_m": 80.18360309771296,
   "end_elevation_m": 79.99002210126265,
   "start_xy": [
    270192.35915756697,
    301875.3612601448
   ],
   "end_xy": [
    270219.4982769958,
    301917.35492867505
   ]
  },
  "min_100m": {
   "gradient_pct": 0.8438528342595362,
   "start_distance_m": 418.0,
   "end_distance_m": 518.0,
   "midpoint_distance_m": 468.0,
   "start_elevation_m": 79.03329317233718,
   "end_elevation_m": 79.87714600659672,
   "start_xy": [
    270161.4982118076,
    301832.2812528756
   ],
   "end_xy": [
    270217.86992983,
    301914.83530856326
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.66701174906586,
   "start_distance_m": 9.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 21.677452135546265,
   "end_elevation_m": 22.37079237052758,
   "start_xy": [
    270033.59062639216,
    301475.2461886432
   ],
   "end_xy": [
    270031.66032114596,
    301475.7695638972
   ]
  },
  "max_3m": {
   "gradient_pct": 31.42761573724317,
   "start_distance_m": 8.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 9.5,
   "start_elevation_m": 21.427963898410287,
   "end_elevation_m": 22.37079237052758,
   "start_xy": [
    270034.55577901524,
    301474.98450101615
   ],
   "end_xy": [
    270031.66032114596,
    301475.7695638972
   ]
  }
 },
 "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": 0.101,
   "obstruction_max_height_m": 12.83,
   "flagged_windows_m": [
    2,
    3
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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_20_269301_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_270301_20220111dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:07:34+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": "hunt-wales-260905",
  "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_20_269301_20220111dtm.tif",
   "wg_del_20_270301_20220111dtm.tif"
  ],
  "elevation_capture_dates": [
   "11-01-2022"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Pennal",
  "county": "Gwynedd - Gwynedd"
 }
}