{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.4706, -3.7603)",
 "slug": "discovered-lane-50-4706-3-7603",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.168214435802255,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 4.0,
   "end_distance_m": 6.0,
   "start_elevation_m": 25.54525047066371,
   "end_elevation_m": 26.428614759379755,
   "min_gradient_pct": -5.5121631832030005
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.18567772993333,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 3.0,
   "end_distance_m": 6.0,
   "start_elevation_m": 25.283044427481755,
   "end_elevation_m": 26.428614759379755,
   "min_gradient_pct": -1.6161114040125806
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.938375943088317,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1.0,
   "end_distance_m": 6.0,
   "start_elevation_m": 24.83169596222534,
   "end_elevation_m": 26.428614759379755,
   "min_gradient_pct": 1.2635480562639145
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.79211434182207,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 121.0,
   "end_distance_m": 131.0,
   "start_elevation_m": 46.332486298336946,
   "end_elevation_m": 49.01169773251915,
   "min_gradient_pct": 8.331769525160269
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.076745982034566,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 39.0,
   "end_distance_m": 59.0,
   "start_elevation_m": 32.92585279284152,
   "end_elevation_m": 37.74120198924843,
   "min_gradient_pct": 10.724862294230597
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.927074555386824,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 33.0,
   "end_distance_m": 58.0,
   "start_elevation_m": 31.536349076094705,
   "end_elevation_m": 37.51811771494141,
   "min_gradient_pct": 11.232331008387746
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.602641327605575,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 17.0,
   "end_distance_m": 67.0,
   "start_elevation_m": 28.139779189713696,
   "end_elevation_m": 39.441099853516484,
   "min_gradient_pct": 12.240822093682455
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.07683894243565,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "start_elevation_m": 24.701546321487612,
   "end_elevation_m": 43.77838526392326,
   "min_gradient_pct": 15.444120295211363
  }
 ],
 "shape": {
  "ascent_concentration": 0.311,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 104.0,
  "shape_class": "sustained"
 },
 "length_m": 216.80250014790852,
 "start_elevation_m": 24.701546321487612,
 "end_elevation_m": 63.125293874802864,
 "endpoint_gain_m": 38.42374755331525,
 "overall_gradient_pct": 17.72292640864452,
 "accumulated_ascent_m": 38.733311771441464,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.938375943088317,
   "start_distance_m": 1.0,
   "end_distance_m": 6.0,
   "midpoint_distance_m": 3.5,
   "start_elevation_m": 24.83169596222534,
   "end_elevation_m": 26.428614759379755,
   "start_xy": [
    275174.06071145926,
    64893.852714882545
   ],
   "end_xy": [
    275169.1871325299,
    64893.11268723665
   ]
  },
  "max_10m": {
   "gradient_pct": 26.79211434182207,
   "start_distance_m": 121.0,
   "end_distance_m": 131.0,
   "midpoint_distance_m": 126.0,
   "start_elevation_m": 46.332486298336946,
   "end_elevation_m": 49.01169773251915,
   "start_xy": [
    275118.0572388188,
    64870.592628907325
   ],
   "end_xy": [
    275113.4573563795,
    64879.4716273307
   ]
  },
  "max_20m": {
   "gradient_pct": 24.076745982034566,
   "start_distance_m": 39.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 49.0,
   "start_elevation_m": 32.92585279284152,
   "end_elevation_m": 37.74120198924843,
   "start_xy": [
    275152.6447462063,
    64865.379236480716
   ],
   "end_xy": [
    275144.4126081697,
    64847.15798246766
   ]
  },
  "max_25m": {
   "gradient_pct": 23.927074555386824,
   "start_distance_m": 33.0,
   "end_distance_m": 58.0,
   "midpoint_distance_m": 45.5,
   "start_elevation_m": 31.536349076094705,
   "end_elevation_m": 37.51811771494141,
   "start_xy": [
    275155.2055299445,
    64870.80532039512
   ],
   "end_xy": [
    275144.79422939295,
    64848.082301266564
   ]
  },
  "max_50m": {
   "gradient_pct": 22.602641327605575,
   "start_distance_m": 17.0,
   "end_distance_m": 67.0,
   "midpoint_distance_m": 42.0,
   "start_elevation_m": 28.139779189713696,
   "end_elevation_m": 39.441099853516484,
   "start_xy": [
    275162.0342865797,
    64885.2748775002
   ],
   "end_xy": [
    275141.01173947117,
    64839.92623106401
   ]
  },
  "max_100m": {
   "gradient_pct": 19.07683894243565,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 24.701546321487612,
   "end_elevation_m": 43.77838526392326,
   "start_xy": [
    275175.06,
    64893.815
   ],
   "end_xy": [
    275126.0038351003,
    64851.33058890529
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.2635480562639145,
   "start_distance_m": 113.0,
   "end_distance_m": 118.0,
   "midpoint_distance_m": 115.5,
   "start_elevation_m": 45.98610772170994,
   "end_elevation_m": 46.04928512452314,
   "start_xy": [
    275121.67082679865,
    64863.455263713404
   ],
   "end_xy": [
    275119.41233431123,
    64867.916116959605
   ]
  },
  "min_10m": {
   "gradient_pct": 8.331769525160269,
   "start_distance_m": 110.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 115.0,
   "start_elevation_m": 45.2320153817211,
   "end_elevation_m": 46.065192334237125,
   "start_xy": [
    275123.02592229116,
    64860.77875176568
   ],
   "end_xy": [
    275118.50893731625,
    64869.700458258085
   ]
  },
  "min_20m": {
   "gradient_pct": 10.724862294230597,
   "start_distance_m": 82.0,
   "end_distance_m": 102.0,
   "midpoint_distance_m": 92.0,
   "start_elevation_m": 41.767198114214665,
   "end_elevation_m": 43.912170573060784,
   "start_xy": [
    275130.262578897,
    64833.97070524655
   ],
   "end_xy": [
    275125.6251331342,
    64853.294407843205
   ]
  },
  "min_25m": {
   "gradient_pct": 11.232331008387746,
   "start_distance_m": 82.0,
   "end_distance_m": 107.0,
   "midpoint_distance_m": 94.5,
   "start_elevation_m": 41.767198114214665,
   "end_elevation_m": 44.5752808663116,
   "start_xy": [
    275130.262578897,
    64833.97070524655
   ],
   "end_xy": [
    275124.3810177836,
    64858.10223981796
   ]
  },
  "min_50m": {
   "gradient_pct": 12.240822093682455,
   "start_distance_m": 70.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 95.0,
   "start_elevation_m": 39.9447812873959,
   "end_elevation_m": 46.065192334237125,
   "start_xy": [
    275139.6162740365,
    64837.27054354084
   ],
   "end_xy": [
    275118.50893731625,
    64869.700458258085
   ]
  },
  "min_100m": {
   "gradient_pct": 15.444120295211363,
   "start_distance_m": 71.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 121.0,
   "start_elevation_m": 40.104834933999484,
   "end_elevation_m": 55.54895522921085,
   "start_xy": [
    275139.1511188916,
    64836.385314366446
   ],
   "end_xy": [
    275093.92576412694,
    64914.28578083834
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.168214435802255,
   "start_distance_m": 4.0,
   "end_distance_m": 6.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 25.54525047066371,
   "end_elevation_m": 26.428614759379755,
   "start_xy": [
    275171.09248023224,
    64893.71942635351
   ],
   "end_xy": [
    275169.1871325299,
    64893.11268723665
   ]
  },
  "max_3m": {
   "gradient_pct": 38.18567772993333,
   "start_distance_m": 3.0,
   "end_distance_m": 6.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 25.283044427481755,
   "end_elevation_m": 26.428614759379755,
   "start_xy": [
    275172.06213437783,
    64893.92814464762
   ],
   "end_xy": [
    275169.1871325299,
    64893.11268723665
   ]
  }
 },
 "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": 0.005,
   "obstruction_max_height_m": 2.46,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "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/england/bulk_dtm_1m/SX7560.tif"
  ],
  "calculated_at": "2026-09-05T00:35:16+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/root/uk-climbs/data/cache/pbf/england-2026-08-27.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "hunt-england-260905",
  "elevation_provider": "Environment Agency",
  "elevation_dataset": "EA LIDAR Composite DTM 1m (2022)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Environment Agency",
  "elevation_coverage_id": "13787b9a-26a4-4775-8523-806d13af58fc__Lidar_Composite_Elevation_DTM_1m",
  "elevation_tile_ids": [
   "SX7560.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Buckfastleigh",
  "county": "Devon"
 }
}