{
 "ocl_version": "0.1.0",
 "name": "Cot Valley to Kelynack",
 "slug": "discovered-lane-50-1146-5-6855",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 52.75904698224139,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 451.0,
   "end_distance_m": 453.0,
   "start_elevation_m": 97.81778036256938,
   "end_elevation_m": 98.87296130221421,
   "min_gradient_pct": -45.32856425310641,
   "suppressed_max_gradient_pct": 72.49253839929395,
   "suppressed_location_m": [
    39.0,
    41.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 46.2145013732993,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 112.0,
   "end_distance_m": 115.0,
   "start_elevation_m": 82.92487501783825,
   "end_elevation_m": 84.31131005903723,
   "min_gradient_pct": -37.88692413301552,
   "suppressed_max_gradient_pct": 63.99916080070464,
   "suppressed_location_m": [
    39.0,
    42.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 38.04296275919086,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 111.0,
   "end_distance_m": 116.0,
   "start_elevation_m": 82.59770319412752,
   "end_elevation_m": 84.49985133208706,
   "min_gradient_pct": -28.92835200735277,
   "suppressed_max_gradient_pct": 51.798663430934084,
   "suppressed_location_m": [
    36.0,
    41.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.27656873357253,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 154.0,
   "end_distance_m": 164.0,
   "start_elevation_m": 85.63343776030209,
   "end_elevation_m": 88.26109463365934,
   "min_gradient_pct": -18.055507735943337,
   "suppressed_max_gradient_pct": 38.452734981683676,
   "suppressed_location_m": [
    35.0,
    45.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.433436899647972,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 150.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 84.68046681057587,
   "end_elevation_m": 89.36715419050546,
   "min_gradient_pct": -6.238812858385643,
   "suppressed_max_gradient_pct": 26.71971597789735,
   "suppressed_location_m": [
    35.0,
    55.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.559021936224326,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 146.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 84.19170190001059,
   "end_elevation_m": 89.58145738406667,
   "min_gradient_pct": -5.421768512664869,
   "suppressed_max_gradient_pct": 24.798698980152835,
   "suppressed_location_m": [
    35.0,
    60.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.35474153730999,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 66.0,
   "end_distance_m": 116.0,
   "start_elevation_m": 76.32248056343207,
   "end_elevation_m": 84.49985133208706,
   "min_gradient_pct": -2.908980454923352,
   "suppressed_max_gradient_pct": 20.736449107967193,
   "suppressed_location_m": [
    35.0,
    85.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.540878438190646,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 70.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 76.82627575231481,
   "end_elevation_m": 89.36715419050546,
   "min_gradient_pct": -1.547565721762453,
   "suppressed_max_gradient_pct": 15.305724195782405,
   "suppressed_location_m": [
    31.0,
    131.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.424,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 75.0,
  "shape_class": "sustained"
 },
 "length_m": 868.3207209700005,
 "start_elevation_m": 69.63176621640449,
 "end_elevation_m": 111.31305826501627,
 "endpoint_gain_m": 41.68129204861178,
 "overall_gradient_pct": 4.800218518573372,
 "accumulated_ascent_m": 70.05519535790748,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 38.04296275919086,
   "start_distance_m": 111.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 113.5,
   "start_elevation_m": 82.59770319412752,
   "end_elevation_m": 84.49985133208706,
   "start_xy": [
    136472.19865916113,
    30444.721944373072
   ],
   "end_xy": [
    136474.5860049378,
    30440.405817114417
   ]
  },
  "max_10m": {
   "gradient_pct": 26.27656873357253,
   "start_distance_m": 154.0,
   "end_distance_m": 164.0,
   "midpoint_distance_m": 159.0,
   "start_elevation_m": 85.63343776030209,
   "end_elevation_m": 88.26109463365934,
   "start_xy": [
    136504.05825466648,
    30416.548768272245
   ],
   "end_xy": [
    136510.96852787692,
    30409.320482409526
   ]
  },
  "max_20m": {
   "gradient_pct": 23.433436899647972,
   "start_distance_m": 150.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 160.0,
   "start_elevation_m": 84.68046681057587,
   "end_elevation_m": 89.36715419050546,
   "start_xy": [
    136501.29404551772,
    30419.439987106653
   ],
   "end_xy": [
    136515.11459193856,
    30404.983415381215
   ]
  },
  "max_25m": {
   "gradient_pct": 21.559021936224326,
   "start_distance_m": 146.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 158.5,
   "start_elevation_m": 84.19170190001059,
   "end_elevation_m": 89.58145738406667,
   "start_xy": [
    136498.46603929927,
    30422.26207773091
   ],
   "end_xy": [
    136515.81375241853,
    30404.268735954705
   ]
  },
  "max_50m": {
   "gradient_pct": 16.35474153730999,
   "start_distance_m": 66.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 91.0,
   "start_elevation_m": 76.32248056343207,
   "end_elevation_m": 84.49985133208706,
   "start_xy": [
    136466.1909311812,
    30487.944366845426
   ],
   "end_xy": [
    136474.5860049378,
    30440.405817114417
   ]
  },
  "max_100m": {
   "gradient_pct": 12.540878438190646,
   "start_distance_m": 70.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 120.0,
   "start_elevation_m": 76.82627575231481,
   "end_elevation_m": 89.36715419050546,
   "start_xy": [
    136465.26296209192,
    30484.053496350563
   ],
   "end_xy": [
    136515.11459193856,
    30404.983415381215
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -28.92835200735277,
   "start_distance_m": 463.0,
   "end_distance_m": 468.0,
   "midpoint_distance_m": 465.5,
   "start_elevation_m": 99.43213369799135,
   "end_elevation_m": 97.98571609762371,
   "start_xy": [
    136757.2791007816,
    30242.6580696177
   ],
   "end_xy": [
    136761.3060635735,
    30239.694382586225
   ]
  },
  "min_10m": {
   "gradient_pct": -18.055507735943337,
   "start_distance_m": 460.0,
   "end_distance_m": 470.0,
   "midpoint_distance_m": 465.0,
   "start_elevation_m": 99.47963159653274,
   "end_elevation_m": 97.67408082293841,
   "start_xy": [
    136754.8972009372,
    30244.481911371833
   ],
   "end_xy": [
    136762.91798297953,
    30238.510441781782
   ]
  },
  "min_20m": {
   "gradient_pct": -6.238812858385643,
   "start_distance_m": 347.0,
   "end_distance_m": 367.0,
   "midpoint_distance_m": 357.0,
   "start_elevation_m": 94.35863461333213,
   "end_elevation_m": 93.110872041655,
   "start_xy": [
    136663.68366404434,
    30311.132745521245
   ],
   "end_xy": [
    136680.07398898984,
    30299.674408593564
   ]
  },
  "min_25m": {
   "gradient_pct": -5.421768512664869,
   "start_distance_m": 356.0,
   "end_distance_m": 381.0,
   "midpoint_distance_m": 368.5,
   "start_elevation_m": 94.36135994519987,
   "end_elevation_m": 93.00591781703365,
   "start_xy": [
    136671.01374552769,
    30305.910687461845
   ],
   "end_xy": [
    136691.60972845924,
    30291.743604438852
   ]
  },
  "min_50m": {
   "gradient_pct": -2.908980454923352,
   "start_distance_m": 322.0,
   "end_distance_m": 372.0,
   "midpoint_distance_m": 347.0,
   "start_elevation_m": 94.93028076844011,
   "end_elevation_m": 93.47579054097844,
   "start_xy": [
    136642.6504840909,
    30324.60349485605
   ],
   "end_xy": [
    136684.22502301855,
    30296.887131512834
   ]
  },
  "min_100m": {
   "gradient_pct": -1.547565721762453,
   "start_distance_m": 285.0,
   "end_distance_m": 385.0,
   "midpoint_distance_m": 335.0,
   "start_elevation_m": 94.59882437771053,
   "end_elevation_m": 93.05125865594808,
   "start_xy": [
    136609.21391557888,
    30340.27395434003
   ],
   "end_xy": [
    136694.87291777207,
    30289.43025340827
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 52.75904698224139,
   "start_distance_m": 451.0,
   "end_distance_m": 453.0,
   "midpoint_distance_m": 452.0,
   "start_elevation_m": 97.81778036256938,
   "end_elevation_m": 98.87296130221421,
   "start_xy": [
    136747.7579183239,
    30249.961932838247
   ],
   "end_xy": [
    136749.34450331144,
    30248.74425155528
   ]
  },
  "max_3m": {
   "gradient_pct": 46.2145013732993,
   "start_distance_m": 112.0,
   "end_distance_m": 115.0,
   "midpoint_distance_m": 113.5,
   "start_elevation_m": 82.92487501783825,
   "end_elevation_m": 84.31131005903723,
   "start_xy": [
    136472.6026802879,
    30443.80719487983
   ],
   "end_xy": [
    136473.8729922541,
    30441.101452803425
   ]
  }
 },
 "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": 0.122,
   "obstruction_max_height_m": 18.68,
   "flagged_windows_m": [
    50,
    100
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.012,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    34.0,
    43.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "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/SW3525.tif",
   "data/cache/england/bulk_dtm_1m/SW3530.tif"
  ],
  "calculated_at": "2026-08-19T18:06:40+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12.osm.pbf",
  "osm_snapshot": "2026-08-12T20:21:46Z",
  "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": [
   "SW3525.tif",
   "SW3530.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 9.6% over 200 m (Terrain 50), gain 34.5 m over 816 m way. EXTENDED by graph walk: +0 segment(s) at base, +1 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (England launch slice 2026-08-16): clean-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (50.1146, -5.6855)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.1146, -5.6855)'"
 },
 "area": {
  "place": "St Just",
  "county": "Cornwall"
 }
}