{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (51.0248, -2.0516)",
 "slug": "discovered-lane-51-0248-2-0516",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.97188165662391,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 767.0,
   "end_distance_m": 769.0,
   "start_elevation_m": 140.59221455197846,
   "end_elevation_m": 141.35165218511094,
   "min_gradient_pct": -41.24973480408016
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.65048917978489,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 767.0,
   "end_distance_m": 770.0,
   "start_elevation_m": 140.59221455197846,
   "end_elevation_m": 141.601729227372,
   "min_gradient_pct": -37.44976540164515
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.017865677738314,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 716.0,
   "end_distance_m": 721.0,
   "start_elevation_m": 132.3595783366422,
   "end_elevation_m": 133.7604716205291,
   "min_gradient_pct": -26.372705937717456
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.375943633768316,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 711.0,
   "end_distance_m": 721.0,
   "start_elevation_m": 131.32287725715227,
   "end_elevation_m": 133.7604716205291,
   "min_gradient_pct": -14.921714790363296
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.69632387614135,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 703.0,
   "end_distance_m": 723.0,
   "start_elevation_m": 130.0077451449302,
   "end_elevation_m": 134.14700992015847,
   "min_gradient_pct": -8.711971442243254
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.610538786509096,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 784.0,
   "end_distance_m": 809.0,
   "start_elevation_m": 143.87356644598702,
   "end_elevation_m": 149.0262011426143,
   "min_gradient_pct": -6.986325759308102
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.926756961742683,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 758.0,
   "end_distance_m": 808.0,
   "start_elevation_m": 138.86025337943505,
   "end_elevation_m": 148.8236318603064,
   "min_gradient_pct": -5.760861876351498
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.010976486280583,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 709.0,
   "end_distance_m": 809.0,
   "start_elevation_m": 131.01522465633371,
   "end_elevation_m": 149.0262011426143,
   "min_gradient_pct": -4.93161004559839
  }
 ],
 "shape": {
  "ascent_concentration": 0.516,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 286.0,
  "shape_class": "stepped"
 },
 "length_m": 2234.0000000000036,
 "start_elevation_m": 114.83328281066966,
 "end_elevation_m": 216.6709922722597,
 "endpoint_gain_m": 101.83770946159004,
 "overall_gradient_pct": 4.5585366813603345,
 "accumulated_ascent_m": 117.47892219649407,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.017865677738314,
   "start_distance_m": 716.0,
   "end_distance_m": 721.0,
   "midpoint_distance_m": 718.5,
   "start_elevation_m": 132.3595783366422,
   "end_elevation_m": 133.7604716205291,
   "start_xy": [
    397519.05449182197,
    124030.60362540049
   ],
   "end_xy": [
    397516.4142729326,
    124034.84971115287
   ]
  },
  "max_10m": {
   "gradient_pct": 24.375943633768316,
   "start_distance_m": 711.0,
   "end_distance_m": 721.0,
   "midpoint_distance_m": 716.0,
   "start_elevation_m": 131.32287725715227,
   "end_elevation_m": 133.7604716205291,
   "start_xy": [
    397521.69471071125,
    124026.35753964812
   ],
   "end_xy": [
    397516.4142729326,
    124034.84971115287
   ]
  },
  "max_20m": {
   "gradient_pct": 20.69632387614135,
   "start_distance_m": 703.0,
   "end_distance_m": 723.0,
   "midpoint_distance_m": 713.0,
   "start_elevation_m": 130.0077451449302,
   "end_elevation_m": 134.14700992015847,
   "start_xy": [
    397525.91906093416,
    124019.56380244432
   ],
   "end_xy": [
    397515.3581853769,
    124036.54814545382
   ]
  },
  "max_25m": {
   "gradient_pct": 20.610538786509096,
   "start_distance_m": 784.0,
   "end_distance_m": 809.0,
   "midpoint_distance_m": 796.5,
   "start_elevation_m": 143.87356644598702,
   "end_elevation_m": 149.0262011426143,
   "start_xy": [
    397489.5511828437,
    124091.54641244166
   ],
   "end_xy": [
    397481.90580069885,
    124115.34383737415
   ]
  },
  "max_50m": {
   "gradient_pct": 19.926756961742683,
   "start_distance_m": 758.0,
   "end_distance_m": 808.0,
   "midpoint_distance_m": 783.0,
   "start_elevation_m": 138.86025337943505,
   "end_elevation_m": 148.8236318603064,
   "start_xy": [
    397498.39000553155,
    124067.09492550339
   ],
   "end_xy": [
    397482.2018980502,
    124114.38867960784
   ]
  },
  "max_100m": {
   "gradient_pct": 18.010976486280583,
   "start_distance_m": 709.0,
   "end_distance_m": 809.0,
   "midpoint_distance_m": 759.0,
   "start_elevation_m": 131.01522465633371,
   "end_elevation_m": 149.0262011426143,
   "start_xy": [
    397522.75079826696,
    124024.65910534716
   ],
   "end_xy": [
    397481.90580069885,
    124115.34383737415
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -26.372705937717456,
   "start_distance_m": 362.0,
   "end_distance_m": 367.0,
   "midpoint_distance_m": 364.5,
   "start_elevation_m": 108.75612400680717,
   "end_elevation_m": 107.4374887099213,
   "start_xy": [
    397608.04658223095,
    123737.62502137902
   ],
   "end_xy": [
    397611.72266439756,
    123741.01418350326
   ]
  },
  "min_10m": {
   "gradient_pct": -14.921714790363296,
   "start_distance_m": 358.0,
   "end_distance_m": 368.0,
   "midpoint_distance_m": 363.0,
   "start_elevation_m": 108.91059093235289,
   "end_elevation_m": 107.41841945331656,
   "start_xy": [
    397605.10571649764,
    123734.91369167964
   ],
   "end_xy": [
    397612.45788083086,
    123741.6920159281
   ]
  },
  "min_20m": {
   "gradient_pct": -8.711971442243254,
   "start_distance_m": 353.0,
   "end_distance_m": 373.0,
   "midpoint_distance_m": 363.0,
   "start_elevation_m": 109.15027016938993,
   "end_elevation_m": 107.40787588094128,
   "start_xy": [
    397601.429634331,
    123731.5245295554
   ],
   "end_xy": [
    397616.13396299747,
    123745.08117805232
   ]
  },
  "min_25m": {
   "gradient_pct": -6.986325759308102,
   "start_distance_m": 353.0,
   "end_distance_m": 378.0,
   "midpoint_distance_m": 365.5,
   "start_elevation_m": 109.15027016938993,
   "end_elevation_m": 107.4036887295629,
   "start_xy": [
    397601.429634331,
    123731.5245295554
   ],
   "end_xy": [
    397619.8100451641,
    123748.47034017656
   ]
  },
  "min_50m": {
   "gradient_pct": -5.760861876351498,
   "start_distance_m": 190.0,
   "end_distance_m": 240.0,
   "midpoint_distance_m": 215.0,
   "start_elevation_m": 112.92576976421111,
   "end_elevation_m": 110.04533882603536,
   "start_xy": [
    397589.67452645465,
    123590.99598809873
   ],
   "end_xy": [
    397569.9501879993,
    123636.94106914663
   ]
  },
  "min_100m": {
   "gradient_pct": -4.93161004559839,
   "start_distance_m": 173.0,
   "end_distance_m": 273.0,
   "midpoint_distance_m": 223.0,
   "start_elevation_m": 113.82219507428866,
   "end_elevation_m": 108.89058502869027,
   "start_xy": [
    397596.38080152945,
    123575.37466054244
   ],
   "end_xy": [
    397559.3294411208,
    123667.97209460997
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.97188165662391,
   "start_distance_m": 767.0,
   "end_distance_m": 769.0,
   "midpoint_distance_m": 768.0,
   "start_elevation_m": 140.59221455197846,
   "end_elevation_m": 141.35165218511094,
   "start_xy": [
    397495.3304130627,
    124075.55890175125
   ],
   "end_xy": [
    397494.65050362516,
    124077.4397853619
   ]
  },
  "max_3m": {
   "gradient_pct": 33.65048917978489,
   "start_distance_m": 767.0,
   "end_distance_m": 770.0,
   "midpoint_distance_m": 768.5,
   "start_elevation_m": 140.59221455197846,
   "end_elevation_m": 141.601729227372,
   "start_xy": [
    397495.3304130627,
    124075.55890175125
   ],
   "end_xy": [
    397494.3105489064,
    124078.38022716722
   ]
  }
 },
 "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": 0.054,
   "obstruction_max_height_m": 9.96,
   "flagged_windows_m": [
    5,
    10
   ]
  },
  "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/ST9520.tif",
   "data/cache/england/bulk_dtm_1m/ST9525.tif"
  ],
  "calculated_at": "2026-09-05T06:00:39+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-27-roads.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "summit-260905-summit-england-england-2026-08-27",
  "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": [
   "ST9520.tif",
   "ST9525.tif"
  ],
  "route_summit_trim_m": 2120.6,
  "route_summit_trim_loss_m": 69.4,
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Alvediston",
  "county": "Wiltshire"
 }
}