{
 "ocl_version": "0.1.0",
 "name": "Crawley to Wortheal",
 "slug": "discovered-lane-50-8698-3-0314",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 46.50054660768603,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2713.0,
   "end_distance_m": 2715.0,
   "start_elevation_m": 238.53937948308854,
   "end_elevation_m": 239.46939041524226,
   "min_gradient_pct": -31.988220758366026
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 43.972401274162586,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 2712.0,
   "end_distance_m": 2715.0,
   "start_elevation_m": 238.15021837701738,
   "end_elevation_m": 239.46939041524226,
   "min_gradient_pct": -26.866697144857692
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 38.33533943015709,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2711.0,
   "end_distance_m": 2716.0,
   "start_elevation_m": 237.9376697800883,
   "end_elevation_m": 239.85443675159615,
   "min_gradient_pct": -19.99810451139581
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.544474795873782,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2676.0,
   "end_distance_m": 2686.0,
   "start_elevation_m": 233.92789468590706,
   "end_elevation_m": 236.78234216549444,
   "min_gradient_pct": -9.773799377062176
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.92177955223167,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2666.0,
   "end_distance_m": 2686.0,
   "start_elevation_m": 232.1979862550481,
   "end_elevation_m": 236.78234216549444,
   "min_gradient_pct": -7.069099909410141
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.161782738124202,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2661.0,
   "end_distance_m": 2686.0,
   "start_elevation_m": 231.2418964809634,
   "end_elevation_m": 236.78234216549444,
   "min_gradient_pct": -6.318678116955937
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.049827844228503,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2650.0,
   "end_distance_m": 2700.0,
   "start_elevation_m": 229.56983743750783,
   "end_elevation_m": 238.59475135962208,
   "min_gradient_pct": -5.654938331664766
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.269650659091212,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2623.0,
   "end_distance_m": 2723.0,
   "start_elevation_m": 227.16592223327078,
   "end_elevation_m": 240.435572892362,
   "min_gradient_pct": -4.605681376768359
  }
 ],
 "shape": {
  "ascent_concentration": 0.423,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 49.0,
  "shape_class": "sustained"
 },
 "length_m": 3216.1415888924435,
 "start_elevation_m": 92.72805747805711,
 "end_elevation_m": 243.69608060760424,
 "endpoint_gain_m": 150.96802312954713,
 "overall_gradient_pct": 4.69407266306135,
 "accumulated_ascent_m": 167.34411330495863,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 38.33533943015709,
   "start_distance_m": 2711.0,
   "end_distance_m": 2716.0,
   "midpoint_distance_m": 2713.5,
   "start_elevation_m": 237.9376697800883,
   "end_elevation_m": 239.85443675159615,
   "start_xy": [
    327823.15794066596,
    108232.16030439577
   ],
   "end_xy": [
    327823.75123175234,
    108227.19562915922
   ]
  },
  "max_10m": {
   "gradient_pct": 28.544474795873782,
   "start_distance_m": 2676.0,
   "end_distance_m": 2686.0,
   "midpoint_distance_m": 2681.0,
   "start_elevation_m": 233.92789468590706,
   "end_elevation_m": 236.78234216549444,
   "start_xy": [
    327806.52237104916,
    108261.8533176361
   ],
   "end_xy": [
    327812.6160012735,
    108253.9244055667
   ]
  },
  "max_20m": {
   "gradient_pct": 22.92177955223167,
   "start_distance_m": 2666.0,
   "end_distance_m": 2686.0,
   "midpoint_distance_m": 2676.0,
   "start_elevation_m": 232.1979862550481,
   "end_elevation_m": 236.78234216549444,
   "start_xy": [
    327800.4289892346,
    108269.78242124293
   ],
   "end_xy": [
    327812.6160012735,
    108253.9244055667
   ]
  },
  "max_25m": {
   "gradient_pct": 22.161782738124202,
   "start_distance_m": 2661.0,
   "end_distance_m": 2686.0,
   "midpoint_distance_m": 2673.5,
   "start_elevation_m": 231.2418964809634,
   "end_elevation_m": 236.78234216549444,
   "start_xy": [
    327797.3825106271,
    108273.74713618477
   ],
   "end_xy": [
    327812.6160012735,
    108253.9244055667
   ]
  },
  "max_50m": {
   "gradient_pct": 18.049827844228503,
   "start_distance_m": 2650.0,
   "end_distance_m": 2700.0,
   "midpoint_distance_m": 2675.0,
   "start_elevation_m": 229.56983743750783,
   "end_elevation_m": 238.59475135962208,
   "start_xy": [
    327790.6796082101,
    108282.46900932684
   ],
   "end_xy": [
    327821.1469254659,
    108242.82380629062
   ]
  },
  "max_100m": {
   "gradient_pct": 13.269650659091212,
   "start_distance_m": 2623.0,
   "end_distance_m": 2723.0,
   "midpoint_distance_m": 2673.0,
   "start_elevation_m": 227.16592223327078,
   "end_elevation_m": 240.435572892362,
   "start_xy": [
    327774.2270896346,
    108303.87729050871
   ],
   "end_xy": [
    327824.5822906412,
    108220.24513775883
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -19.99810451139581,
   "start_distance_m": 2703.0,
   "end_distance_m": 2708.0,
   "midpoint_distance_m": 2705.5,
   "start_elevation_m": 238.79342422111438,
   "end_elevation_m": 237.7935189955446,
   "start_xy": [
    327822.2082196229,
    108240.10373037367
   ],
   "end_xy": [
    327822.80196385196,
    108235.13910927967
   ]
  },
  "min_10m": {
   "gradient_pct": -9.773799377062176,
   "start_distance_m": 1026.0,
   "end_distance_m": 1036.0,
   "midpoint_distance_m": 1031.0,
   "start_elevation_m": 124.33649336242948,
   "end_elevation_m": 123.35911342472326,
   "start_xy": [
    326708.78777139337,
    108126.62037998717
   ],
   "end_xy": [
    326714.9030473682,
    108134.53261024226
   ]
  },
  "min_20m": {
   "gradient_pct": -7.069099909410141,
   "start_distance_m": 1020.0,
   "end_distance_m": 1040.0,
   "midpoint_distance_m": 1030.0,
   "start_elevation_m": 124.55104106259938,
   "end_elevation_m": 123.13722108071735,
   "start_xy": [
    326704.50006088585,
    108122.63809316141
   ],
   "end_xy": [
    326717.3496008515,
    108137.69715920382
   ]
  },
  "min_25m": {
   "gradient_pct": -6.318678116955937,
   "start_distance_m": 1016.0,
   "end_distance_m": 1041.0,
   "midpoint_distance_m": 1028.5,
   "start_elevation_m": 124.68663448486276,
   "end_elevation_m": 123.10696495562378,
   "start_xy": [
    326700.8526932267,
    108120.99592787604
   ],
   "end_xy": [
    326717.96068813314,
    108138.48872198614
   ]
  },
  "min_50m": {
   "gradient_pct": -5.654938331664766,
   "start_distance_m": 2942.0,
   "end_distance_m": 2992.0,
   "midpoint_distance_m": 2967.0,
   "start_elevation_m": 243.96481113327945,
   "end_elevation_m": 241.13734196744707,
   "start_xy": [
    327951.8386168087,
    108098.00351588745
   ],
   "end_xy": [
    328001.7666195569,
    108100.51427706445
   ]
  },
  "min_100m": {
   "gradient_pct": -4.605681376768359,
   "start_distance_m": 2918.0,
   "end_distance_m": 3018.0,
   "midpoint_distance_m": 2968.0,
   "start_elevation_m": 244.7525608010102,
   "end_elevation_m": 240.14687942424183,
   "start_xy": [
    327927.848848137,
    108097.30286631042
   ],
   "end_xy": [
    328027.72817159723,
    108101.72654220118
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 46.50054660768603,
   "start_distance_m": 2713.0,
   "end_distance_m": 2715.0,
   "midpoint_distance_m": 2714.0,
   "start_elevation_m": 238.53937948308854,
   "end_elevation_m": 239.46939041524226,
   "start_xy": [
    327823.39525513205,
    108230.17443406624
   ],
   "end_xy": [
    327823.6322442453,
    108228.18852491064
   ]
  },
  "max_3m": {
   "gradient_pct": 43.972401274162586,
   "start_distance_m": 2712.0,
   "end_distance_m": 2715.0,
   "midpoint_distance_m": 2713.5,
   "start_elevation_m": 238.15021837701738,
   "end_elevation_m": 239.46939041524226,
   "start_xy": [
    327823.2762676251,
    108231.16732981766
   ],
   "end_xy": [
    327823.6322442453,
    108228.18852491064
   ]
  }
 },
 "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": 0.111,
   "obstruction_max_height_m": 21.04,
   "flagged_windows_m": [
    2,
    5,
    10
   ]
  },
  "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/ST2505.tif"
  ],
  "calculated_at": "2026-08-19T18:19:18+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": [
   "ST2505.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 9.7% over 200 m (Terrain 50), gain 119.6 m over 2044 m way. EXTENDED by graph walk: +4 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 (50.8698, -3.0314)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.8698, -3.0314)'"
 },
 "area": {
  "place": "Yarcombe",
  "county": "Devon"
 }
}