{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.7439, -3.2168)",
 "slug": "discovered-lane-50-7439-3-2168",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.64257100227093,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 239.0,
   "end_distance_m": 241.0,
   "start_elevation_m": 122.71500958672989,
   "end_elevation_m": 123.38786100677531,
   "min_gradient_pct": -6.537038848578902
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.131829348103206,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 239.0,
   "end_distance_m": 242.0,
   "start_elevation_m": 122.71500958672989,
   "end_elevation_m": 123.64896446717299,
   "min_gradient_pct": -4.875611897734681
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.584453057003486,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 238.0,
   "end_distance_m": 243.0,
   "start_elevation_m": 122.47642893012903,
   "end_elevation_m": 123.8556515829792,
   "min_gradient_pct": -1.591525812041823
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.960704664644084,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 238.0,
   "end_distance_m": 248.0,
   "start_elevation_m": 122.47642893012903,
   "end_elevation_m": 124.87249939659344,
   "min_gradient_pct": -0.6518386374055751
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.64741764644043,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 317.0,
   "end_distance_m": 337.0,
   "start_elevation_m": 137.69027497940735,
   "end_elevation_m": 142.21975850869543,
   "min_gradient_pct": 1.1209964824734442
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.41606776619585,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 315.0,
   "end_distance_m": 340.0,
   "start_elevation_m": 137.21840285877056,
   "end_elevation_m": 142.82241980031952,
   "min_gradient_pct": 1.4907572833567997
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.596275798393837,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 313.0,
   "end_distance_m": 363.0,
   "start_elevation_m": 136.8384229093566,
   "end_elevation_m": 147.63656080855353,
   "min_gradient_pct": 2.040055255945987
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.00889611610782,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 282.0,
   "end_distance_m": 382.0,
   "start_elevation_m": 131.01868075581515,
   "end_elevation_m": 151.02757687192297,
   "min_gradient_pct": 2.9589789395774204
  }
 ],
 "shape": {
  "ascent_concentration": 0.442,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 202.0,
  "shape_class": "sustained"
 },
 "length_m": 384.8638700801791,
 "start_elevation_m": 107.88934044326743,
 "end_elevation_m": 151.45758065087642,
 "endpoint_gain_m": 43.568240207608994,
 "overall_gradient_pct": 11.320428752777541,
 "accumulated_ascent_m": 44.011973770339054,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.584453057003486,
   "start_distance_m": 238.0,
   "end_distance_m": 243.0,
   "midpoint_distance_m": 240.5,
   "start_elevation_m": 122.47642893012903,
   "end_elevation_m": 123.8556515829792,
   "start_xy": [
    313973.1913170913,
    94820.22377277138
   ],
   "end_xy": [
    313968.68543489993,
    94822.39103502536
   ]
  },
  "max_10m": {
   "gradient_pct": 23.960704664644084,
   "start_distance_m": 238.0,
   "end_distance_m": 248.0,
   "midpoint_distance_m": 243.0,
   "start_elevation_m": 122.47642893012903,
   "end_elevation_m": 124.87249939659344,
   "start_xy": [
    313973.1913170913,
    94820.22377277138
   ],
   "end_xy": [
    313964.33110278175,
    94824.82594925446
   ]
  },
  "max_20m": {
   "gradient_pct": 22.64741764644043,
   "start_distance_m": 317.0,
   "end_distance_m": 337.0,
   "midpoint_distance_m": 327.0,
   "start_elevation_m": 137.69027497940735,
   "end_elevation_m": 142.21975850869543,
   "start_xy": [
    313911.0443205817,
    94868.34609676208
   ],
   "end_xy": [
    313896.56222251646,
    94882.13707472655
   ]
  },
  "max_25m": {
   "gradient_pct": 22.41606776619585,
   "start_distance_m": 315.0,
   "end_distance_m": 340.0,
   "midpoint_distance_m": 327.5,
   "start_elevation_m": 137.21840285877056,
   "end_elevation_m": 142.82241980031952,
   "start_xy": [
    313912.49086414196,
    94866.96496978446
   ],
   "end_xy": [
    313894.10798392585,
    94883.8623900427
   ]
  },
  "max_50m": {
   "gradient_pct": 21.596275798393837,
   "start_distance_m": 313.0,
   "end_distance_m": 363.0,
   "midpoint_distance_m": 338.0,
   "start_elevation_m": 136.8384229093566,
   "end_elevation_m": 147.63656080855353,
   "start_xy": [
    313913.9374077022,
    94865.58384280684
   ],
   "end_xy": [
    313873.1553861973,
    94892.23646636054
   ]
  },
  "max_100m": {
   "gradient_pct": 20.00889611610782,
   "start_distance_m": 282.0,
   "end_distance_m": 382.0,
   "midpoint_distance_m": 332.0,
   "start_elevation_m": 131.01868075581515,
   "end_elevation_m": 151.02757687192297,
   "start_xy": [
    313936.8310792117,
    94844.68649136383
   ],
   "end_xy": [
    313854.59987263725,
    94896.32216293768
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.591525812041823,
   "start_distance_m": 13.0,
   "end_distance_m": 18.0,
   "midpoint_distance_m": 15.5,
   "start_elevation_m": 108.56466626407949,
   "end_elevation_m": 108.4850899734774,
   "start_xy": [
    314119.7132872208,
    94663.20895601719
   ],
   "end_xy": [
    314115.85942435166,
    94666.3945079295
   ]
  },
  "min_10m": {
   "gradient_pct": -0.6518386374055751,
   "start_distance_m": 10.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 15.0,
   "start_elevation_m": 108.54984319274043,
   "end_elevation_m": 108.48465932899987,
   "start_xy": [
    314122.2908151943,
    94661.75679783367
   ],
   "end_xy": [
    314114.317879204,
    94667.6687286944
   ]
  },
  "min_20m": {
   "gradient_pct": 1.1209964824734442,
   "start_distance_m": 9.0,
   "end_distance_m": 29.0,
   "midpoint_distance_m": 19.0,
   "start_elevation_m": 108.5169295080166,
   "end_elevation_m": 108.74112880451129,
   "start_xy": [
    314123.2278336749,
    94661.40751805031
   ],
   "end_xy": [
    314107.3809260396,
    94673.40272213654
   ]
  },
  "min_25m": {
   "gradient_pct": 1.4907572833567997,
   "start_distance_m": 9.0,
   "end_distance_m": 34.0,
   "midpoint_distance_m": 21.5,
   "start_elevation_m": 108.5169295080166,
   "end_elevation_m": 108.8896188288558,
   "start_xy": [
    314123.2278336749,
    94661.40751805031
   ],
   "end_xy": [
    314103.52706317045,
    94676.58827404883
   ]
  },
  "min_50m": {
   "gradient_pct": 2.040055255945987,
   "start_distance_m": 10.0,
   "end_distance_m": 60.0,
   "midpoint_distance_m": 35.0,
   "start_elevation_m": 108.54984319274043,
   "end_elevation_m": 109.56987082071342,
   "start_xy": [
    314122.2908151943,
    94661.75679783367
   ],
   "end_xy": [
    314090.73398337344,
    94698.7263526991
   ]
  },
  "min_100m": {
   "gradient_pct": 2.9589789395774204,
   "start_distance_m": 10.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 60.0,
   "start_elevation_m": 108.54984319274043,
   "end_elevation_m": 111.50882213231785,
   "start_xy": [
    314122.2908151943,
    94661.75679783367
   ],
   "end_xy": [
    314074.00424304476,
    94745.24970634164
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.64257100227093,
   "start_distance_m": 239.0,
   "end_distance_m": 241.0,
   "midpoint_distance_m": 240.0,
   "start_elevation_m": 122.71500958672989,
   "end_elevation_m": 123.38786100677531,
   "start_xy": [
    313972.290140653,
    94820.65722522218
   ],
   "end_xy": [
    313970.48778777645,
    94821.52413012377
   ]
  },
  "max_3m": {
   "gradient_pct": 31.131829348103206,
   "start_distance_m": 239.0,
   "end_distance_m": 242.0,
   "midpoint_distance_m": 240.5,
   "start_elevation_m": 122.71500958672989,
   "end_elevation_m": 123.64896446717299,
   "start_xy": [
    313972.290140653,
    94820.65722522218
   ],
   "end_xy": [
    313969.5866113382,
    94821.95758257456
   ]
  }
 },
 "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": 0.184,
   "obstruction_max_height_m": 23.8,
   "flagged_windows_m": [
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "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/SY1090.tif"
  ],
  "calculated_at": "2026-09-05T01:17:06+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106794610/hunt-gb/regions/region-03.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": [
   "SY1090.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Chalcombe Bottom",
  "county": "Devon"
 }
}