{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.5317, -4.7786)",
 "slug": "discovered-lane-50-5317-4-7786",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.197385305587645,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 141.0,
   "end_distance_m": 143.0,
   "start_elevation_m": 32.62004801783594,
   "end_elevation_m": 33.263995723947694,
   "min_gradient_pct": -13.818617943888789
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.517071662551604,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 141.0,
   "end_distance_m": 144.0,
   "start_elevation_m": 32.62004801783594,
   "end_elevation_m": 33.53556016771249,
   "min_gradient_pct": -10.594078726885195
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.551817658571082,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 250.0,
   "end_distance_m": 255.0,
   "start_elevation_m": 47.98982910378878,
   "end_elevation_m": 49.31741998671733,
   "min_gradient_pct": -8.84056098519416
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.987574298949767,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 250.0,
   "end_distance_m": 260.0,
   "start_elevation_m": 47.98982910378878,
   "end_elevation_m": 50.288586533683755,
   "min_gradient_pct": -4.331163737541743
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.054642729979797,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 236.0,
   "end_distance_m": 256.0,
   "start_elevation_m": 45.45220144095898,
   "end_elevation_m": 49.46312998695494,
   "min_gradient_pct": 0.11573069471740638
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.291173719923705,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 236.0,
   "end_distance_m": 261.0,
   "start_elevation_m": 45.45220144095898,
   "end_elevation_m": 50.524994870939906,
   "min_gradient_pct": 1.08146324055636
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.730479630904398,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 223.0,
   "end_distance_m": 273.0,
   "start_elevation_m": 43.18695093279358,
   "end_elevation_m": 52.55219074824578,
   "min_gradient_pct": 4.322430491955004
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.02029765944001,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 216.0,
   "end_distance_m": 316.0,
   "start_elevation_m": 42.034015568295416,
   "end_elevation_m": 59.05431322773543,
   "min_gradient_pct": 5.640505722034646
  }
 ],
 "shape": {
  "ascent_concentration": 0.353,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 300.0,
  "shape_class": "sustained"
 },
 "length_m": 875.0489538887255,
 "start_elevation_m": 17.742039037792473,
 "end_elevation_m": 113.83469176368693,
 "endpoint_gain_m": 96.09265272589445,
 "overall_gradient_pct": 10.981403074520328,
 "accumulated_ascent_m": 97.50098844754781,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.551817658571082,
   "start_distance_m": 250.0,
   "end_distance_m": 255.0,
   "midpoint_distance_m": 252.5,
   "start_elevation_m": 47.98982910378878,
   "end_elevation_m": 49.31741998671733,
   "start_xy": [
    203202.79618384407,
    73655.2460797234
   ],
   "end_xy": [
    203203.14014274042,
    73650.25792452558
   ]
  },
  "max_10m": {
   "gradient_pct": 22.987574298949767,
   "start_distance_m": 250.0,
   "end_distance_m": 260.0,
   "midpoint_distance_m": 255.0,
   "start_elevation_m": 47.98982910378878,
   "end_elevation_m": 50.288586533683755,
   "start_xy": [
    203202.79618384407,
    73655.2460797234
   ],
   "end_xy": [
    203203.48410163677,
    73645.26976932774
   ]
  },
  "max_20m": {
   "gradient_pct": 20.054642729979797,
   "start_distance_m": 236.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 246.0,
   "start_elevation_m": 45.45220144095898,
   "end_elevation_m": 49.46312998695494,
   "start_xy": [
    203201.8330989343,
    73669.21291427732
   ],
   "end_xy": [
    203203.20893451967,
    73649.260293486
   ]
  },
  "max_25m": {
   "gradient_pct": 20.291173719923705,
   "start_distance_m": 236.0,
   "end_distance_m": 261.0,
   "midpoint_distance_m": 248.5,
   "start_elevation_m": 45.45220144095898,
   "end_elevation_m": 50.524994870939906,
   "start_xy": [
    203201.8330989343,
    73669.21291427732
   ],
   "end_xy": [
    203203.55289341602,
    73644.27213828817
   ]
  },
  "max_50m": {
   "gradient_pct": 18.730479630904398,
   "start_distance_m": 223.0,
   "end_distance_m": 273.0,
   "midpoint_distance_m": 248.0,
   "start_elevation_m": 43.18695093279358,
   "end_elevation_m": 52.55219074824578,
   "start_xy": [
    203199.69935154327,
    73681.94722512364
   ],
   "end_xy": [
    203204.37839476726,
    73632.30056581339
   ]
  },
  "max_100m": {
   "gradient_pct": 17.02029765944001,
   "start_distance_m": 216.0,
   "end_distance_m": 316.0,
   "midpoint_distance_m": 266.0,
   "start_elevation_m": 42.034015568295416,
   "end_elevation_m": 59.05431322773543,
   "start_xy": [
    203197.5923753167,
    73688.62260160595
   ],
   "end_xy": [
    203207.33644127587,
    73589.40243111206
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.84056098519416,
   "start_distance_m": 9.0,
   "end_distance_m": 14.0,
   "midpoint_distance_m": 11.5,
   "start_elevation_m": 17.872759191992,
   "end_elevation_m": 17.43073114273229,
   "start_xy": [
    203169.5971601877,
    73892.9539663866
   ],
   "end_xy": [
    203170.62169362532,
    73888.0600588236
   ]
  },
  "min_10m": {
   "gradient_pct": -4.331163737541743,
   "start_distance_m": 6.0,
   "end_distance_m": 16.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 17.753907974423903,
   "end_elevation_m": 17.32079160066973,
   "start_xy": [
    203168.98244012514,
    73895.8903109244
   ],
   "end_xy": [
    203171.03150700036,
    73886.1024957984
   ]
  },
  "min_20m": {
   "gradient_pct": 0.11573069471740638,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 17.742039037792473,
   "end_elevation_m": 17.765185176735955,
   "start_xy": [
    203167.753,
    73901.763
   ],
   "end_xy": [
    203171.85113375046,
    73882.18736974799
   ]
  },
  "min_25m": {
   "gradient_pct": 1.08146324055636,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 17.742039037792473,
   "end_elevation_m": 18.012404847931563,
   "start_xy": [
    203167.753,
    73901.763
   ],
   "end_xy": [
    203172.87566718805,
    73877.293462185
   ]
  },
  "min_50m": {
   "gradient_pct": 4.322430491955004,
   "start_distance_m": 825.0,
   "end_distance_m": 875.0,
   "midpoint_distance_m": 850.0,
   "start_elevation_m": 111.67362811411576,
   "end_elevation_m": 113.83484336009326,
   "start_xy": [
    203412.2831578804,
    73129.72901691035
   ],
   "end_xy": [
    203441.1650139187,
    73088.99205905861
   ]
  },
  "min_100m": {
   "gradient_pct": 5.640505722034646,
   "start_distance_m": 565.0,
   "end_distance_m": 665.0,
   "midpoint_distance_m": 615.0,
   "start_elevation_m": 90.11741774741058,
   "end_elevation_m": 95.75792346944523,
   "start_xy": [
    203277.63569522195,
    73352.09107666898
   ],
   "end_xy": [
    203329.24848680693,
    73266.45079222972
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.197385305587645,
   "start_distance_m": 141.0,
   "end_distance_m": 143.0,
   "midpoint_distance_m": 142.0,
   "start_elevation_m": 32.62004801783594,
   "end_elevation_m": 33.263995723947694,
   "start_xy": [
    203185.47325195876,
    73762.16583601215
   ],
   "end_xy": [
    203185.62550976133,
    73760.17164004345
   ]
  },
  "max_3m": {
   "gradient_pct": 30.517071662551604,
   "start_distance_m": 141.0,
   "end_distance_m": 144.0,
   "midpoint_distance_m": 142.5,
   "start_elevation_m": 32.62004801783594,
   "end_elevation_m": 33.53556016771249,
   "start_xy": [
    203185.47325195876,
    73762.16583601215
   ],
   "end_xy": [
    203185.7016386626,
    73759.1745420591
   ]
  }
 },
 "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": 0.018,
   "obstruction_max_height_m": 7.01,
   "flagged_windows_m": []
  },
  "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/england/bulk_dtm_1m/SX0070.tif"
  ],
  "calculated_at": "2026-09-05T00:20:37+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": [
   "SX0070.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "St Mabyn",
  "county": "Cornwall"
 }
}