{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.7278, -3.1330)",
 "slug": "discovered-lane-50-7278-3-1330",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.390000000000015,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 166.0,
   "end_distance_m": 168.0,
   "start_elevation_m": 81.1505,
   "end_elevation_m": 81.9583,
   "min_gradient_pct": -20.000000000000284,
   "suppressed_max_gradient_pct": 50.969999999999516,
   "suppressed_location_m": [
    701.0,
    703.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.80666666666671,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 166.0,
   "end_distance_m": 169.0,
   "start_elevation_m": 81.1505,
   "end_elevation_m": 82.1347,
   "min_gradient_pct": -12.396666666666553,
   "suppressed_max_gradient_pct": 41.200000000000614,
   "suppressed_location_m": [
    738.0,
    741.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.279999999999973,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 848.0,
   "end_distance_m": 853.0,
   "start_elevation_m": 157.931,
   "end_elevation_m": 159.145,
   "min_gradient_pct": -9.012000000000171,
   "suppressed_max_gradient_pct": 36.02399999999989,
   "suppressed_location_m": [
    737.0,
    742.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.28000000000003,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 846.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 157.5281,
   "end_elevation_m": 159.8561,
   "min_gradient_pct": -7.356000000000051,
   "suppressed_max_gradient_pct": 29.661000000000115,
   "suppressed_location_m": [
    736.0,
    746.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.752999999999986,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 837.0,
   "end_distance_m": 857.0,
   "start_elevation_m": 155.9084,
   "end_elevation_m": 160.059,
   "min_gradient_pct": -6.869999999999976,
   "suppressed_max_gradient_pct": 24.384000000000015,
   "suppressed_location_m": [
    731.0,
    751.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.13519999999994,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 832.0,
   "end_distance_m": 857.0,
   "start_elevation_m": 155.0252,
   "end_elevation_m": 160.059,
   "min_gradient_pct": -6.524000000000001,
   "suppressed_max_gradient_pct": 22.99599999999998,
   "suppressed_location_m": [
    728.0,
    753.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.868799999999965,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 810.0,
   "end_distance_m": 860.0,
   "start_elevation_m": 151.1329,
   "end_elevation_m": 160.5673,
   "min_gradient_pct": -3.714800000000025,
   "suppressed_max_gradient_pct": 18.908600000000035,
   "suppressed_location_m": [
    696.0,
    746.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.81479999999999,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 784.0,
   "end_distance_m": 884.0,
   "start_elevation_m": 146.916,
   "end_elevation_m": 163.7308,
   "min_gradient_pct": -2.135300000000001,
   "suppressed_max_gradient_pct": 16.996300000000005,
   "suppressed_location_m": [
    659.0,
    759.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.511,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 145.0,
  "shape_class": "stepped"
 },
 "length_m": 2082.8321108122796,
 "start_elevation_m": 64.16523815862965,
 "end_elevation_m": 184.94174361218265,
 "endpoint_gain_m": 120.776505453553,
 "overall_gradient_pct": 5.798667344649858,
 "accumulated_ascent_m": 136.2132661377026,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.279999999999973,
   "start_distance_m": 848.0,
   "end_distance_m": 853.0,
   "midpoint_distance_m": 850.5,
   "start_elevation_m": 157.931,
   "end_elevation_m": 159.145,
   "start_xy": [
    320165.722,
    92713.439
   ],
   "end_xy": [
    320163.6,
    92708.912
   ]
  },
  "max_10m": {
   "gradient_pct": 23.28000000000003,
   "start_distance_m": 846.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 851.0,
   "start_elevation_m": 157.5281,
   "end_elevation_m": 159.8561,
   "start_xy": [
    320166.57,
    92715.25
   ],
   "end_xy": [
    320162.327,
    92706.196
   ]
  },
  "max_20m": {
   "gradient_pct": 20.752999999999986,
   "start_distance_m": 837.0,
   "end_distance_m": 857.0,
   "midpoint_distance_m": 847.0,
   "start_elevation_m": 155.9084,
   "end_elevation_m": 160.059,
   "start_xy": [
    320170.39,
    92723.4
   ],
   "end_xy": [
    320161.903,
    92705.29
   ]
  },
  "max_25m": {
   "gradient_pct": 20.13519999999994,
   "start_distance_m": 832.0,
   "end_distance_m": 857.0,
   "midpoint_distance_m": 844.5,
   "start_elevation_m": 155.0252,
   "end_elevation_m": 160.059,
   "start_xy": [
    320172.511,
    92727.927
   ],
   "end_xy": [
    320161.903,
    92705.29
   ]
  },
  "max_50m": {
   "gradient_pct": 18.868799999999965,
   "start_distance_m": 810.0,
   "end_distance_m": 860.0,
   "midpoint_distance_m": 835.0,
   "start_elevation_m": 151.1329,
   "end_elevation_m": 160.5673,
   "start_xy": [
    320183.67,
    92746.682
   ],
   "end_xy": [
    320160.629,
    92702.574
   ]
  },
  "max_100m": {
   "gradient_pct": 16.81479999999999,
   "start_distance_m": 784.0,
   "end_distance_m": 884.0,
   "midpoint_distance_m": 834.0,
   "start_elevation_m": 146.916,
   "end_elevation_m": 163.7308,
   "start_xy": [
    320200.419,
    92766.568
   ],
   "end_xy": [
    320150.445,
    92680.842
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.012000000000171,
   "start_distance_m": 117.0,
   "end_distance_m": 122.0,
   "midpoint_distance_m": 119.5,
   "start_elevation_m": 76.1029,
   "end_elevation_m": 75.6523,
   "start_xy": [
    320567.302,
    93317.777
   ],
   "end_xy": [
    320563.287,
    93314.796
   ]
  },
  "min_10m": {
   "gradient_pct": -7.356000000000051,
   "start_distance_m": 1002.0,
   "end_distance_m": 1012.0,
   "midpoint_distance_m": 1007.0,
   "start_elevation_m": 170.6271,
   "end_elevation_m": 169.8915,
   "start_xy": [
    320068.555,
    92609.101
   ],
   "end_xy": [
    320059.292,
    92605.332
   ]
  },
  "min_20m": {
   "gradient_pct": -6.869999999999976,
   "start_distance_m": 1000.0,
   "end_distance_m": 1020.0,
   "midpoint_distance_m": 1010.0,
   "start_elevation_m": 170.7522,
   "end_elevation_m": 169.3782,
   "start_xy": [
    320070.407,
    92609.855
   ],
   "end_xy": [
    320051.883,
    92602.316
   ]
  },
  "min_25m": {
   "gradient_pct": -6.524000000000001,
   "start_distance_m": 997.0,
   "end_distance_m": 1022.0,
   "midpoint_distance_m": 1009.5,
   "start_elevation_m": 170.9056,
   "end_elevation_m": 169.2746,
   "start_xy": [
    320073.186,
    92610.985
   ],
   "end_xy": [
    320050.03,
    92601.562
   ]
  },
  "min_50m": {
   "gradient_pct": -3.714800000000025,
   "start_distance_m": 988.0,
   "end_distance_m": 1038.0,
   "midpoint_distance_m": 1013.0,
   "start_elevation_m": 170.9034,
   "end_elevation_m": 169.046,
   "start_xy": [
    320081.526,
    92614.367
   ],
   "end_xy": [
    320035.863,
    92594.373
   ]
  },
  "min_100m": {
   "gradient_pct": -2.135300000000001,
   "start_distance_m": 1185.0,
   "end_distance_m": 1285.0,
   "midpoint_distance_m": 1235.0,
   "start_elevation_m": 172.7156,
   "end_elevation_m": 170.5803,
   "start_xy": [
    319908.961,
    92521.345
   ],
   "end_xy": [
    319811.243,
    92500.427
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.390000000000015,
   "start_distance_m": 166.0,
   "end_distance_m": 168.0,
   "midpoint_distance_m": 167.0,
   "start_elevation_m": 81.1505,
   "end_elevation_m": 81.9583,
   "start_xy": [
    320541.217,
    93277.17
   ],
   "end_xy": [
    320540.279,
    93275.403
   ]
  },
  "max_3m": {
   "gradient_pct": 32.80666666666671,
   "start_distance_m": 166.0,
   "end_distance_m": 169.0,
   "midpoint_distance_m": 167.5,
   "start_elevation_m": 81.1505,
   "end_elevation_m": 82.1347,
   "start_xy": [
    320541.217,
    93277.17
   ],
   "end_xy": [
    320539.81,
    93274.52
   ]
  }
 },
 "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": 0.023,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.177,
   "obstruction_max_height_m": 26.5,
   "flagged_windows_m": [
    20,
    25,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    46.0
   ],
   [
    600.0,
    624.0
   ],
   [
    687.0,
    696.0
   ],
   [
    698.0,
    707.0
   ],
   [
    735.0,
    744.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ],
  "texture_suppression": {
   "masked_fraction": 0.049,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 4,
   "windows_masked": [
    {
     "window_m": 5.0,
     "start_m": 737.0,
     "end_m": 742.0,
     "raw_pct": 36.02,
     "reason": "short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 700.0,
     "end_m": 705.0,
     "raw_pct": 33.88,
     "reason": "short-step"
    },
    {
     "window_m": 20.0,
     "start_m": 602.0,
     "end_m": 622.0,
     "raw_pct": 22.04,
     "reason": "hump"
    },
    {
     "window_m": 5.0,
     "start_m": 689.0,
     "end_m": 694.0,
     "raw_pct": 25.95,
     "reason": "mask-edge"
    }
   ],
   "advisory": [],
   "unresolved": []
  }
 },
 "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/SY1590.tif",
   "data/cache/england/bulk_dtm_1m/SY2090.tif"
  ],
  "calculated_at": "2026-09-05T01:20:53+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": [
   "SY1590.tif",
   "SY2090.tif"
  ],
  "climb_origin": "discovered",
  "mask_basin_extension_m": 30.0,
  "qa_replayed": {
   "on": "2026-09-20",
   "rule": "window texture with the sampling-stability gate (retro suppression-verdicts-stability; Peter 2026-09-20)",
   "retro": [
    "window-texture",
    "hump-advisory",
    "suppression-verdict-stability"
   ],
   "method": "replayed over the page's own published profile \u2014 no raster, no re-line, no re-resample",
   "script": "scripts/texture_sweep_apply.py",
   "code_git_sha": "fd294479d730",
   "published_max25_pct": 23.0,
   "max25_pct": 20.14,
   "move_pp": -2.86,
   "reasons": "hump;mask-edge;short-step"
  },
  "remeasured": {
   "on": "2026-09-20",
   "why": "texture replay (texture-replay)",
   "published_max25_pct": 23.0,
   "max25_pct": 20.14
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Southleigh",
  "county": "Devon"
 }
}