{
 "ocl_version": "0.1.0",
 "name": "Quell Lane",
 "slug": "quell-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 39.1482427958195,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 947.0,
   "end_distance_m": 949.0,
   "start_elevation_m": 171.79934004238723,
   "end_elevation_m": 172.58230489830362,
   "min_gradient_pct": -32.16583279732674,
   "suppressed_max_gradient_pct": 60.06247739556159,
   "suppressed_location_m": [
    900.0,
    902.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.4339862792973,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 947.0,
   "end_distance_m": 950.0,
   "start_elevation_m": 171.79934004238723,
   "end_elevation_m": 172.80235963076615,
   "min_gradient_pct": -24.221712567324023,
   "suppressed_max_gradient_pct": 59.16218144835644,
   "suppressed_location_m": [
    900.0,
    903.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.488652911268787,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 947.0,
   "end_distance_m": 952.0,
   "start_elevation_m": 171.79934004238723,
   "end_elevation_m": 173.27377268795067,
   "min_gradient_pct": -18.02039592600977,
   "suppressed_max_gradient_pct": 50.50882701164653,
   "suppressed_location_m": [
    899.0,
    904.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.857814398669404,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 943.0,
   "end_distance_m": 953.0,
   "start_elevation_m": 171.01365141566828,
   "end_elevation_m": 173.49943285553522,
   "min_gradient_pct": -13.20988682140296,
   "suppressed_max_gradient_pct": 35.6375547467519,
   "suppressed_location_m": [
    900.0,
    910.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.72951435150196,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 610.0,
   "end_distance_m": 630.0,
   "start_elevation_m": 121.0691524819604,
   "end_elevation_m": 125.4150553522608,
   "min_gradient_pct": -8.948063432074562,
   "suppressed_max_gradient_pct": 28.55945465848677,
   "suppressed_location_m": [
    894.0,
    914.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.47091485520951,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 604.0,
   "end_distance_m": 629.0,
   "start_elevation_m": 119.83467340099051,
   "end_elevation_m": 125.20240211479289,
   "min_gradient_pct": -7.885889214703241,
   "suppressed_max_gradient_pct": 26.378247358542808,
   "suppressed_location_m": [
    889.0,
    914.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.547626534461074,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 604.0,
   "end_distance_m": 654.0,
   "start_elevation_m": 119.83467340099051,
   "end_elevation_m": 130.10848666822105,
   "min_gradient_pct": -3.8072453805208397,
   "suppressed_max_gradient_pct": 21.89850667120373,
   "suppressed_location_m": [
    864.0,
    914.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.01863234802812,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 599.0,
   "end_distance_m": 699.0,
   "start_elevation_m": 118.93328274031734,
   "end_elevation_m": 137.95191508834546,
   "min_gradient_pct": 0.19603750311691215
  }
 ],
 "shape": {
  "ascent_concentration": 0.385,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 175.0,
  "shape_class": "sustained"
 },
 "length_m": 1083.4130277705408,
 "start_elevation_m": 89.65753788020461,
 "end_elevation_m": 186.92876478305075,
 "endpoint_gain_m": 97.27122690284614,
 "overall_gradient_pct": 8.97822200855494,
 "accumulated_ascent_m": 106.7617764430067,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.488652911268787,
   "start_distance_m": 947.0,
   "end_distance_m": 952.0,
   "midpoint_distance_m": 949.5,
   "start_elevation_m": 171.79934004238723,
   "end_elevation_m": 173.27377268795067,
   "start_xy": [
    492371.91028170293,
    129028.71050928102
   ],
   "end_xy": [
    492370.7293817198,
    129033.49904436525
   ]
  },
  "max_10m": {
   "gradient_pct": 24.857814398669404,
   "start_distance_m": 943.0,
   "end_distance_m": 953.0,
   "midpoint_distance_m": 948.0,
   "start_elevation_m": 171.01365141566828,
   "end_elevation_m": 173.49943285553522,
   "start_xy": [
    492373.5492036519,
    129025.06168308732
   ],
   "end_xy": [
    492370.6691553416,
    129034.4972290015
   ]
  },
  "max_20m": {
   "gradient_pct": 21.72951435150196,
   "start_distance_m": 610.0,
   "end_distance_m": 630.0,
   "midpoint_distance_m": 620.0,
   "start_elevation_m": 121.0691524819604,
   "end_elevation_m": 125.4150553522608,
   "start_xy": [
    492646.1559101668,
    128894.81702091999
   ],
   "end_xy": [
    492634.30445433216,
    128910.92735686252
   ]
  },
  "max_25m": {
   "gradient_pct": 21.47091485520951,
   "start_distance_m": 604.0,
   "end_distance_m": 629.0,
   "midpoint_distance_m": 616.5,
   "start_elevation_m": 119.83467340099051,
   "end_elevation_m": 125.20240211479289,
   "start_xy": [
    492648.95697476156,
    128889.54564761986
   ],
   "end_xy": [
    492634.89703762217,
    128910.12184768388
   ]
  },
  "max_50m": {
   "gradient_pct": 20.547626534461074,
   "start_distance_m": 604.0,
   "end_distance_m": 654.0,
   "midpoint_distance_m": 629.0,
   "start_elevation_m": 119.83467340099051,
   "end_elevation_m": 130.10848666822105,
   "start_xy": [
    492648.95697476156,
    128889.54564761986
   ],
   "end_xy": [
    492620.08408982295,
    128930.26077673299
   ]
  },
  "max_100m": {
   "gradient_pct": 19.01863234802812,
   "start_distance_m": 599.0,
   "end_distance_m": 699.0,
   "midpoint_distance_m": 649.0,
   "start_elevation_m": 118.93328274031734,
   "end_elevation_m": 137.95191508834546,
   "start_xy": [
    492650.58016255294,
    128884.84454977498
   ],
   "end_xy": [
    492592.7695436627,
    128965.94990728251
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -18.02039592600977,
   "start_distance_m": 366.0,
   "end_distance_m": 371.0,
   "midpoint_distance_m": 368.5,
   "start_elevation_m": 106.79661638703466,
   "end_elevation_m": 105.89559659073417,
   "start_xy": [
    492586.6173455176,
    128694.45595814248
   ],
   "end_xy": [
    492582.810142633,
    128697.69713067432
   ]
  },
  "min_10m": {
   "gradient_pct": -13.20988682140296,
   "start_distance_m": 364.0,
   "end_distance_m": 374.0,
   "midpoint_distance_m": 369.0,
   "start_elevation_m": 106.86443299468145,
   "end_elevation_m": 105.54344431254115,
   "start_xy": [
    492588.1405807815,
    128693.15990493241
   ],
   "end_xy": [
    492580.52631414885,
    128699.64241052105
   ]
  },
  "min_20m": {
   "gradient_pct": -8.948063432074562,
   "start_distance_m": 354.0,
   "end_distance_m": 374.0,
   "midpoint_distance_m": 364.0,
   "start_elevation_m": 107.33305699895607,
   "end_elevation_m": 105.54344431254115,
   "start_xy": [
    492595.7554918196,
    128686.67815349421
   ],
   "end_xy": [
    492580.52631414885,
    128699.64241052105
   ]
  },
  "min_25m": {
   "gradient_pct": -7.885889214703241,
   "start_distance_m": 349.0,
   "end_distance_m": 374.0,
   "midpoint_distance_m": 361.5,
   "start_elevation_m": 107.51491661621696,
   "end_elevation_m": 105.54344431254115,
   "start_xy": [
    492600.2856470466,
    128684.58938704227
   ],
   "end_xy": [
    492580.52631414885,
    128699.64241052105
   ]
  },
  "min_50m": {
   "gradient_pct": -3.8072453805208397,
   "start_distance_m": 336.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 361.0,
   "start_elevation_m": 107.22376459276192,
   "end_elevation_m": 105.3201419025015,
   "start_xy": [
    492612.7227170513,
    128681.03957062669
   ],
   "end_xy": [
    492571.78802378254,
    128707.84952140157
   ]
  },
  "min_100m": {
   "gradient_pct": 0.19603750311691215,
   "start_distance_m": 156.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 206.0,
   "start_elevation_m": 99.27719726467762,
   "end_elevation_m": 99.47323476779454,
   "start_xy": [
    492730.0771414331,
    128565.06753275207
   ],
   "end_xy": [
    492685.37097081915,
    128650.85963154476
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 39.1482427958195,
   "start_distance_m": 947.0,
   "end_distance_m": 949.0,
   "midpoint_distance_m": 948.0,
   "start_elevation_m": 171.79934004238723,
   "end_elevation_m": 172.58230489830362,
   "start_xy": [
    492371.91028170293,
    129028.71050928102
   ],
   "end_xy": [
    492371.1120678205,
    129030.54328397434
   ]
  },
  "max_3m": {
   "gradient_pct": 33.4339862792973,
   "start_distance_m": 947.0,
   "end_distance_m": 950.0,
   "midpoint_distance_m": 948.5,
   "start_elevation_m": 171.79934004238723,
   "end_elevation_m": 172.80235963076615,
   "start_xy": [
    492371.91028170293,
    129028.71050928102
   ],
   "end_xy": [
    492370.85559210245,
    129031.50303990838
   ]
  }
 },
 "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": 0.017,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.04,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 2,
   "windows_masked": [
    {
     "window_m": 10.0,
     "start_m": 285.0,
     "end_m": 295.0,
     "raw_pct": 28.56,
     "reason": "short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 289.0,
     "end_m": 294.0,
     "raw_pct": 40.71,
     "reason": "short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 928.0,
     "end_m": 933.0,
     "raw_pct": 33.41,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.187,
   "obstruction_max_height_m": 17.2,
   "flagged_windows_m": [
    2,
    3,
    5,
    10
   ]
  },
  "excluded_ranges_m": [
   [
    283.0,
    297.0
   ],
   [
    899.0,
    904.0
   ],
   [
    906.0,
    911.0
   ],
   [
    926.0,
    935.0
   ],
   [
    967.0,
    972.0
   ]
  ],
  "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/SU9025.tif"
  ],
  "calculated_at": "2026-09-12T01:38:23+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-uk-england/batch-england-rchunk03.pbf",
  "osm_snapshot": "",
  "run_id": "texture-uk-england-260912",
  "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": [
   "SU9025.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Windfallwood Common",
  "county": "West Sussex"
 }
}