{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.3394, -3.6328)",
 "slug": "discovered-lane-50-3394-3-6328",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.11280011171783,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1234.0,
   "end_distance_m": 1236.0,
   "start_elevation_m": 129.43479193291884,
   "end_elevation_m": 130.3170479351532,
   "min_gradient_pct": -96.08697136046587,
   "suppressed_max_gradient_pct": 71.76114652845769,
   "suppressed_location_m": [
    559.0,
    561.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.86627097429971,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1233.0,
   "end_distance_m": 1236.0,
   "start_elevation_m": 129.1810598059242,
   "end_elevation_m": 130.3170479351532,
   "min_gradient_pct": -76.67291377894021,
   "suppressed_max_gradient_pct": 54.91144480807956,
   "suppressed_location_m": [
    558.0,
    561.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 33.226125738199244,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 860.0,
   "end_distance_m": 865.0,
   "start_elevation_m": 77.00677983355777,
   "end_elevation_m": 78.66808612046773,
   "min_gradient_pct": -53.518882937426895
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.51253212997392,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 857.0,
   "end_distance_m": 867.0,
   "start_elevation_m": 76.34336196298999,
   "end_elevation_m": 79.19461517598738,
   "min_gradient_pct": -36.27667208373836
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.25303252881639,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 848.0,
   "end_distance_m": 868.0,
   "start_elevation_m": 74.67803028327222,
   "end_elevation_m": 79.3286367890355,
   "min_gradient_pct": -25.86833187222595
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.28870236181302,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 842.0,
   "end_distance_m": 867.0,
   "start_elevation_m": 73.87243958553412,
   "end_elevation_m": 79.19461517598738,
   "min_gradient_pct": -23.338579170216917
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.843365447783953,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 848.0,
   "end_distance_m": 898.0,
   "start_elevation_m": 74.67803028327222,
   "end_elevation_m": 84.5997130071642,
   "min_gradient_pct": -18.987857637573768
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.59899449896571,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 851.0,
   "end_distance_m": 951.0,
   "start_elevation_m": 75.15591482709388,
   "end_elevation_m": 92.75490932605959,
   "min_gradient_pct": -16.568672087758102
  }
 ],
 "shape": {
  "ascent_concentration": 0.623,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 164.0,
  "shape_class": "stepped"
 },
 "length_m": 2008.5150764582356,
 "start_elevation_m": 140.64045648497,
 "end_elevation_m": 157.88802066093444,
 "endpoint_gain_m": 17.247564175964442,
 "overall_gradient_pct": 0.8587221663468096,
 "accumulated_ascent_m": 110.37431546400698,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 33.226125738199244,
   "start_distance_m": 860.0,
   "end_distance_m": 865.0,
   "midpoint_distance_m": 862.5,
   "start_elevation_m": 77.00677983355777,
   "end_elevation_m": 78.66808612046773,
   "start_xy": [
    284614.58592813456,
    50640.561436353506
   ],
   "end_xy": [
    284612.32026094256,
    50636.10422285456
   ]
  },
  "max_10m": {
   "gradient_pct": 28.51253212997392,
   "start_distance_m": 857.0,
   "end_distance_m": 867.0,
   "midpoint_distance_m": 862.0,
   "start_elevation_m": 76.34336196298999,
   "end_elevation_m": 79.19461517598738,
   "start_xy": [
    284615.9453284497,
    50643.235764452875
   ],
   "end_xy": [
    284611.4139940658,
    50634.32133745498
   ]
  },
  "max_20m": {
   "gradient_pct": 23.25303252881639,
   "start_distance_m": 848.0,
   "end_distance_m": 868.0,
   "midpoint_distance_m": 858.0,
   "start_elevation_m": 74.67803028327222,
   "end_elevation_m": 79.3286367890355,
   "start_xy": [
    284620.0235293953,
    50651.25874875097
   ],
   "end_xy": [
    284610.85540898825,
    50633.512276776346
   ]
  },
  "max_25m": {
   "gradient_pct": 21.28870236181302,
   "start_distance_m": 842.0,
   "end_distance_m": 867.0,
   "midpoint_distance_m": 854.5,
   "start_elevation_m": 73.87243958553412,
   "end_elevation_m": 79.19461517598738,
   "start_xy": [
    284622.74233002565,
    50656.60740494971
   ],
   "end_xy": [
    284611.4139940658,
    50634.32133745498
   ]
  },
  "max_50m": {
   "gradient_pct": 19.843365447783953,
   "start_distance_m": 848.0,
   "end_distance_m": 898.0,
   "midpoint_distance_m": 873.0,
   "start_elevation_m": 74.67803028327222,
   "end_elevation_m": 84.5997130071642,
   "start_xy": [
    284620.0235293953,
    50651.25874875097
   ],
   "end_xy": [
    284588.19655442773,
    50613.85073283885
   ]
  },
  "max_100m": {
   "gradient_pct": 17.59899449896571,
   "start_distance_m": 851.0,
   "end_distance_m": 951.0,
   "midpoint_distance_m": 901.0,
   "start_elevation_m": 75.15591482709388,
   "end_elevation_m": 92.75490932605959,
   "start_xy": [
    284618.66412908013,
    50648.584420651605
   ],
   "end_xy": [
    284543.9155035039,
    50585.05411417026
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -53.518882937426895,
   "start_distance_m": 575.0,
   "end_distance_m": 580.0,
   "midpoint_distance_m": 577.5,
   "start_elevation_m": 106.43397547561443,
   "end_elevation_m": 103.75803132874309,
   "start_xy": [
    284829.8171164717,
    50819.76736819984
   ],
   "end_xy": [
    284826.35160371254,
    50816.16317323895
   ]
  },
  "min_10m": {
   "gradient_pct": -36.27667208373836,
   "start_distance_m": 570.0,
   "end_distance_m": 580.0,
   "midpoint_distance_m": 575.0,
   "start_elevation_m": 107.38569853711692,
   "end_elevation_m": 103.75803132874309,
   "start_xy": [
    284833.2826292309,
    50823.37156316074
   ],
   "end_xy": [
    284826.35160371254,
    50816.16317323895
   ]
  },
  "min_20m": {
   "gradient_pct": -25.86833187222595,
   "start_distance_m": 562.0,
   "end_distance_m": 582.0,
   "midpoint_distance_m": 572.0,
   "start_elevation_m": 108.68951604265442,
   "end_elevation_m": 103.51584966820923,
   "start_xy": [
    284838.8274496455,
    50829.13827509817
   ],
   "end_xy": [
    284824.9653986089,
    50814.72149525459
   ]
  },
  "min_25m": {
   "gradient_pct": -23.338579170216917,
   "start_distance_m": 562.0,
   "end_distance_m": 587.0,
   "midpoint_distance_m": 574.5,
   "start_elevation_m": 108.68951604265442,
   "end_elevation_m": 102.85487125010019,
   "start_xy": [
    284838.8274496455,
    50829.13827509817
   ],
   "end_xy": [
    284821.4998858498,
    50811.1173002937
   ]
  },
  "min_50m": {
   "gradient_pct": -18.987857637573768,
   "start_distance_m": 684.0,
   "end_distance_m": 734.0,
   "midpoint_distance_m": 709.0,
   "start_elevation_m": 91.74606833592449,
   "end_elevation_m": 82.2521395171376,
   "start_xy": [
    284742.2101808098,
    50755.80898246473
   ],
   "end_xy": [
    284703.47109635756,
    50724.2687842779
   ]
  },
  "min_100m": {
   "gradient_pct": -16.568672087758102,
   "start_distance_m": 683.0,
   "end_distance_m": 783.0,
   "midpoint_distance_m": 733.0,
   "start_elevation_m": 91.922443128635,
   "end_elevation_m": 75.3537710408769,
   "start_xy": [
    284743.0494651996,
    50756.35267512883
   ],
   "end_xy": [
    284664.9211606581,
    50694.5132117837
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.11280011171783,
   "start_distance_m": 1234.0,
   "end_distance_m": 1236.0,
   "midpoint_distance_m": 1235.0,
   "start_elevation_m": 129.43479193291884,
   "end_elevation_m": 130.3170479351532,
   "start_xy": [
    284292.9585819949,
    50455.52371908504
   ],
   "end_xy": [
    284291.24723849184,
    50454.488681204326
   ]
  },
  "max_3m": {
   "gradient_pct": 37.86627097429971,
   "start_distance_m": 1233.0,
   "end_distance_m": 1236.0,
   "midpoint_distance_m": 1234.5,
   "start_elevation_m": 129.1810598059242,
   "end_elevation_m": 130.3170479351532,
   "start_xy": [
    284293.8142537465,
    50456.0412380254
   ],
   "end_xy": [
    284291.24723849184,
    50454.488681204326
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.021,
   "windows_resited": [
    2.0,
    3.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.219,
   "obstruction_max_height_m": 20.81,
   "flagged_windows_m": [
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    469.0,
    474.0
   ],
   [
    522.0,
    527.0
   ],
   [
    538.0,
    543.0
   ],
   [
    554.0,
    563.0
   ],
   [
    576.0,
    582.0
   ],
   [
    710.0,
    716.0
   ]
  ],
  "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/england/bulk_dtm_1m/SX8050.tif",
   "data/cache/england/bulk_dtm_1m/SX8550.tif"
  ],
  "calculated_at": "2026-09-05T01:28:48+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106792346/hunt-gb/regions/region-00.osm.pbf",
  "osm_snapshot": "",
  "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": [
   "SX8050.tif",
   "SX8550.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Dartmouth",
  "county": "Devon"
 }
}