{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (51.7079, -3.7762)",
 "slug": "discovered-lane-51-7079-3-7762",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 36.46499475454519,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 99.0,
   "end_distance_m": 101.0,
   "start_elevation_m": 118.78798451958265,
   "end_elevation_m": 119.51728441467355,
   "min_gradient_pct": -16.516705038027624
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.33362738178206,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 98.0,
   "end_distance_m": 101.0,
   "start_elevation_m": 118.54727559322009,
   "end_elevation_m": 119.51728441467355,
   "min_gradient_pct": -12.82391728083212
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.16500179136267,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 156.0,
   "end_distance_m": 161.0,
   "start_elevation_m": 129.07544033915156,
   "end_elevation_m": 130.6336904287197,
   "min_gradient_pct": -10.348469410191683
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.74920043336408,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 331.0,
   "end_distance_m": 341.0,
   "start_elevation_m": 159.72431036060124,
   "end_elevation_m": 162.49923040393764,
   "min_gradient_pct": -6.438097161574774
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.786767165671222,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 323.0,
   "end_distance_m": 343.0,
   "start_elevation_m": 158.00923752354566,
   "end_elevation_m": 162.9665909566799,
   "min_gradient_pct": -3.9992315803985434
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.484105813589167,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 155.0,
   "end_distance_m": 180.0,
   "start_elevation_m": 128.8476393872764,
   "end_elevation_m": 134.71866584067368,
   "min_gradient_pct": -3.8481542793965673
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.30278014502656,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 135.0,
   "end_distance_m": 185.0,
   "start_elevation_m": 125.10864723402771,
   "end_elevation_m": 135.760037306541,
   "min_gradient_pct": -1.5656994307237255
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.807807088212115,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 87.0,
   "end_distance_m": 187.0,
   "start_elevation_m": 116.32060585232813,
   "end_elevation_m": 136.12841294054024,
   "min_gradient_pct": 2.046871965190803
  }
 ],
 "shape": {
  "ascent_concentration": 0.422,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 230.0,
  "shape_class": "sustained"
 },
 "length_m": 825.0000000000013,
 "start_elevation_m": 107.75699157580533,
 "end_elevation_m": 192.81106138023856,
 "endpoint_gain_m": 85.05406980443323,
 "overall_gradient_pct": 10.309584218719163,
 "accumulated_ascent_m": 90.05681337052468,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.16500179136267,
   "start_distance_m": 156.0,
   "end_distance_m": 161.0,
   "midpoint_distance_m": 158.5,
   "start_elevation_m": 129.07544033915156,
   "end_elevation_m": 130.6336904287197,
   "start_xy": [
    277477.971384291,
    202319.61585360902
   ],
   "end_xy": [
    277476.6568182842,
    202324.4399510597
   ]
  },
  "max_10m": {
   "gradient_pct": 27.74920043336408,
   "start_distance_m": 331.0,
   "end_distance_m": 341.0,
   "midpoint_distance_m": 336.0,
   "start_elevation_m": 159.72431036060124,
   "end_elevation_m": 162.49923040393764,
   "start_xy": [
    277385.7768741983,
    202465.0267195092
   ],
   "end_xy": [
    277383.91525896,
    202474.85191104448
   ]
  },
  "max_20m": {
   "gradient_pct": 24.786767165671222,
   "start_distance_m": 323.0,
   "end_distance_m": 343.0,
   "midpoint_distance_m": 333.0,
   "start_elevation_m": 158.00923752354566,
   "end_elevation_m": 162.9665909566799,
   "start_xy": [
    277389.1131622147,
    202457.83863763345
   ],
   "end_xy": [
    277383.5429359123,
    202476.81694935152
   ]
  },
  "max_25m": {
   "gradient_pct": 23.484105813589167,
   "start_distance_m": 155.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 167.5,
   "start_elevation_m": 128.8476393872764,
   "end_elevation_m": 134.71866584067368,
   "start_xy": [
    277478.23429749237,
    202318.65103411887
   ],
   "end_xy": [
    277469.1953060944,
    202341.90851956946
   ]
  },
  "max_50m": {
   "gradient_pct": 21.30278014502656,
   "start_distance_m": 135.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 160.0,
   "start_elevation_m": 125.10864723402771,
   "end_elevation_m": 135.760037306541,
   "start_xy": [
    277484.68019496714,
    202299.9219648465
   ],
   "end_xy": [
    277467.2151184398,
    202346.49969119034
   ]
  },
  "max_100m": {
   "gradient_pct": 19.807807088212115,
   "start_distance_m": 87.0,
   "end_distance_m": 187.0,
   "midpoint_distance_m": 137.0,
   "start_elevation_m": 116.32060585232813,
   "end_elevation_m": 136.12841294054024,
   "start_xy": [
    277514.39506684564,
    202262.24430784502
   ],
   "end_xy": [
    277466.423043378,
    202348.33615983868
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.348469410191683,
   "start_distance_m": 544.0,
   "end_distance_m": 549.0,
   "midpoint_distance_m": 546.5,
   "start_elevation_m": 177.75731391712176,
   "end_elevation_m": 177.23989044661218,
   "start_xy": [
    277314.55487267475,
    202372.08988941897
   ],
   "end_xy": [
    277312.0864116926,
    202367.74170584654
   ]
  },
  "min_10m": {
   "gradient_pct": -6.438097161574774,
   "start_distance_m": 540.0,
   "end_distance_m": 550.0,
   "midpoint_distance_m": 545.0,
   "start_elevation_m": 177.8605670298485,
   "end_elevation_m": 177.21675731369103,
   "start_xy": [
    277316.52964146045,
    202375.56843627695
   ],
   "end_xy": [
    277311.59271949617,
    202366.87206913205
   ]
  },
  "min_20m": {
   "gradient_pct": -3.9992315803985434,
   "start_distance_m": 661.0,
   "end_distance_m": 681.0,
   "midpoint_distance_m": 671.0,
   "start_elevation_m": 184.98914553219436,
   "end_elevation_m": 184.18929921611465,
   "start_xy": [
    277251.70970999607,
    202273.49500306492
   ],
   "end_xy": [
    277241.5825365302,
    202256.24854378795
   ]
  },
  "min_25m": {
   "gradient_pct": -3.8481542793965673,
   "start_distance_m": 658.0,
   "end_distance_m": 683.0,
   "midpoint_distance_m": 670.5,
   "start_elevation_m": 185.0706973710094,
   "end_elevation_m": 184.10865880116026,
   "start_xy": [
    277253.22878601594,
    202276.08197195648
   ],
   "end_xy": [
    277240.5698191836,
    202254.52389786026
   ]
  },
  "min_50m": {
   "gradient_pct": -1.5656994307237255,
   "start_distance_m": 651.0,
   "end_distance_m": 701.0,
   "midpoint_distance_m": 676.0,
   "start_elevation_m": 185.01393994737776,
   "end_elevation_m": 184.2310902320159,
   "start_xy": [
    277256.77329672896,
    202282.11823270342
   ],
   "end_xy": [
    277240.5027993884,
    202237.48870928882
   ]
  },
  "min_100m": {
   "gradient_pct": 2.046871965190803,
   "start_distance_m": 594.0,
   "end_distance_m": 694.0,
   "midpoint_distance_m": 644.0,
   "start_elevation_m": 181.92253535986677,
   "end_elevation_m": 183.96940732505757,
   "start_xy": [
    277288.72048554686,
    202329.3224827608
   ],
   "end_xy": [
    277239.11565925064,
    202244.3498930233
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 36.46499475454519,
   "start_distance_m": 99.0,
   "end_distance_m": 101.0,
   "midpoint_distance_m": 100.0,
   "start_elevation_m": 118.78798451958265,
   "end_elevation_m": 119.51728441467355,
   "start_xy": [
    277506.828282532,
    202271.5579416767
   ],
   "end_xy": [
    277505.56715181307,
    202273.110213982
   ]
  },
  "max_3m": {
   "gradient_pct": 32.33362738178206,
   "start_distance_m": 98.0,
   "end_distance_m": 101.0,
   "midpoint_distance_m": 99.5,
   "start_elevation_m": 118.54727559322009,
   "end_elevation_m": 119.51728441467355,
   "start_xy": [
    277507.4588478915,
    202270.78180552408
   ],
   "end_xy": [
    277505.56715181307,
    202273.110213982
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.062,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.527,
   "obstruction_max_height_m": 19.51,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    450.0,
    500.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "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_14_277201_20210321dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_277202_20220112dtm.tif"
  ],
  "calculated_at": "2026-09-05T06:03:14+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_14_277201_20210321dtm.tif",
   "wg_del_20_277202_20220112dtm.tif"
  ],
  "elevation_capture_dates": [
   "12-01-2022",
   "24-12-2020"
  ],
  "route_summit_trim_m": 245.9,
  "route_summit_trim_loss_m": 4.4,
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cil-ffriw",
  "county": "Castell-nedd Port Talbot - Neath Port Talbot"
 }
}