{
 "ocl_version": "0.1.0",
 "name": "Lane near Bransdale",
 "slug": "discovered-lane-54-3611-1-0613",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.27509431103681,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 476.0,
   "end_distance_m": 478.0,
   "start_elevation_m": 344.0061667219749,
   "end_elevation_m": 344.61166860819566,
   "min_gradient_pct": -4.900310210467751
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.971360746497037,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 481.0,
   "end_distance_m": 484.0,
   "start_elevation_m": 344.939445965995,
   "end_elevation_m": 345.8085867883899,
   "min_gradient_pct": -4.69964581176517
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.82390080461778,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 481.0,
   "end_distance_m": 486.0,
   "start_elevation_m": 344.939445965995,
   "end_elevation_m": 346.2306410062259,
   "min_gradient_pct": -4.558762018236848
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.244742842509595,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 476.0,
   "end_distance_m": 486.0,
   "start_elevation_m": 344.0061667219749,
   "end_elevation_m": 346.2306410062259,
   "min_gradient_pct": -3.4437343788550834
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.832904454422874,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 469.0,
   "end_distance_m": 489.0,
   "start_elevation_m": 342.66885512494713,
   "end_elevation_m": 346.8354360158317,
   "min_gradient_pct": -1.4321123105102629
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.295274263651663,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 472.0,
   "end_distance_m": 497.0,
   "start_elevation_m": 343.19499720533463,
   "end_elevation_m": 348.26881577124755,
   "min_gradient_pct": -0.45184134785085917
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.130688213703706,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 450.0,
   "end_distance_m": 500.0,
   "start_elevation_m": 339.16858680802466,
   "end_elevation_m": 348.7339309148765,
   "min_gradient_pct": 1.0022204478610774
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.068986834258,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 426.0,
   "end_distance_m": 526.0,
   "start_elevation_m": 335.3246805012452,
   "end_elevation_m": 352.3936673355032,
   "min_gradient_pct": 1.4732031332166002
  }
 ],
 "shape": {
  "ascent_concentration": 0.449,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 150.0,
  "shape_class": "sustained"
 },
 "length_m": 848.2356528488036,
 "start_elevation_m": 300.1014042587883,
 "end_elevation_m": 365.498024212891,
 "endpoint_gain_m": 65.39661995410268,
 "overall_gradient_pct": 7.70972308632251,
 "accumulated_ascent_m": 66.21997868398756,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.82390080461778,
   "start_distance_m": 481.0,
   "end_distance_m": 486.0,
   "midpoint_distance_m": 483.5,
   "start_elevation_m": 344.939445965995,
   "end_elevation_m": 346.2306410062259,
   "start_xy": [
    461115.44865282264,
    496589.2996998863
   ],
   "end_xy": [
    461110.91400952,
    496587.2176509463
   ]
  },
  "max_10m": {
   "gradient_pct": 22.244742842509595,
   "start_distance_m": 476.0,
   "end_distance_m": 486.0,
   "midpoint_distance_m": 481.0,
   "start_elevation_m": 344.0061667219749,
   "end_elevation_m": 346.2306410062259,
   "start_xy": [
    461120.05776968505,
    496591.23774906487
   ],
   "end_xy": [
    461110.91400952,
    496587.2176509463
   ]
  },
  "max_20m": {
   "gradient_pct": 20.832904454422874,
   "start_distance_m": 469.0,
   "end_distance_m": 489.0,
   "midpoint_distance_m": 479.0,
   "start_elevation_m": 342.66885512494713,
   "end_elevation_m": 346.8354360158317,
   "start_xy": [
    461126.51015728514,
    496593.9519121764
   ],
   "end_xy": [
    461108.46019069006,
    496585.4917390912
   ]
  },
  "max_25m": {
   "gradient_pct": 20.295274263651663,
   "start_distance_m": 472.0,
   "end_distance_m": 497.0,
   "midpoint_distance_m": 484.5,
   "start_elevation_m": 343.19499720533463,
   "end_elevation_m": 348.26881577124755,
   "start_xy": [
    461123.7448187992,
    496592.7887697333
   ],
   "end_xy": [
    461101.918366966,
    496580.8869022072
   ]
  },
  "max_50m": {
   "gradient_pct": 19.130688213703706,
   "start_distance_m": 450.0,
   "end_distance_m": 500.0,
   "midpoint_distance_m": 475.0,
   "start_elevation_m": 339.16858680802466,
   "end_elevation_m": 348.7339309148765,
   "start_xy": [
    461140.6580453646,
    496606.16462688363
   ],
   "end_xy": [
    461099.4653316431,
    496579.1598773775
   ]
  },
  "max_100m": {
   "gradient_pct": 17.068986834258,
   "start_distance_m": 426.0,
   "end_distance_m": 526.0,
   "midpoint_distance_m": 476.0,
   "start_elevation_m": 335.3246805012452,
   "end_elevation_m": 352.3936673355032,
   "start_xy": [
    461153.98180955864,
    496626.0885885904
   ],
   "end_xy": [
    461084.4716065798,
    496558.37981191586
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.558762018236848,
   "start_distance_m": 289.0,
   "end_distance_m": 294.0,
   "midpoint_distance_m": 291.5,
   "start_elevation_m": 323.8665458454081,
   "end_elevation_m": 323.63860774449626,
   "start_xy": [
    461204.1674368623,
    496752.993941561
   ],
   "end_xy": [
    461202.8444879298,
    496748.17213722394
   ]
  },
  "min_10m": {
   "gradient_pct": -3.4437343788550834,
   "start_distance_m": 288.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 293.0,
   "start_elevation_m": 323.9080605993897,
   "end_elevation_m": 323.5636871615042,
   "start_xy": [
    461204.4324978238,
    496753.9581732155
   ],
   "end_xy": [
    461201.7854199844,
    496744.31488786754
   ]
  },
  "min_20m": {
   "gradient_pct": -1.4321123105102629,
   "start_distance_m": 285.0,
   "end_distance_m": 305.0,
   "midpoint_distance_m": 295.0,
   "start_elevation_m": 323.8801203731894,
   "end_elevation_m": 323.59369791108736,
   "start_xy": [
    461205.22650277073,
    496756.85119121126
   ],
   "end_xy": [
    461199.9326028959,
    496737.56454996835
   ]
  },
  "min_25m": {
   "gradient_pct": -0.45184134785085917,
   "start_distance_m": 284.0,
   "end_distance_m": 309.0,
   "midpoint_distance_m": 296.5,
   "start_elevation_m": 323.84311271645856,
   "end_elevation_m": 323.73015237949585,
   "start_xy": [
    461205.4915662611,
    496757.81542217225
   ],
   "end_xy": [
    461198.87446285697,
    496733.7070460155
   ]
  },
  "min_50m": {
   "gradient_pct": 1.0022204478610774,
   "start_distance_m": 798.0,
   "end_distance_m": 848.0,
   "midpoint_distance_m": 823.0,
   "start_elevation_m": 364.99753484391425,
   "end_elevation_m": 365.4986450678448,
   "start_xy": [
    460984.91130713664,
    496307.66675353225
   ],
   "end_xy": [
    460973.65437419305,
    496258.9698117618
   ]
  },
  "min_100m": {
   "gradient_pct": 1.4732031332166002,
   "start_distance_m": 748.0,
   "end_distance_m": 848.0,
   "midpoint_distance_m": 798.0,
   "start_elevation_m": 364.0254419346282,
   "end_elevation_m": 365.4986450678448,
   "start_xy": [
    460997.1401879092,
    496356.1482337628
   ],
   "end_xy": [
    460973.65437419305,
    496258.9698117618
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.27509431103681,
   "start_distance_m": 476.0,
   "end_distance_m": 478.0,
   "midpoint_distance_m": 477.0,
   "start_elevation_m": 344.0061667219749,
   "end_elevation_m": 344.61166860819566,
   "start_xy": [
    461120.05776968505,
    496591.23774906487
   ],
   "end_xy": [
    461118.2139913085,
    496590.46284232935
   ]
  },
  "max_3m": {
   "gradient_pct": 28.971360746497037,
   "start_distance_m": 481.0,
   "end_distance_m": 484.0,
   "midpoint_distance_m": 482.5,
   "start_elevation_m": 344.939445965995,
   "end_elevation_m": 345.8085867883899,
   "start_xy": [
    461115.44865282264,
    496589.2996998863
   ],
   "end_xy": [
    461112.6831665689,
    496588.13690839167
   ]
  }
 },
 "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": 0.015,
   "obstruction_max_height_m": 6.32,
   "flagged_windows_m": []
  },
  "review": [],
  "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/SE6095.tif"
  ],
  "calculated_at": "2026-08-19T18:30:38+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": [
   "SE6095.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.5% over 200 m (Terrain 50), gain 34.5 m over 464 m way. EXTENDED by graph walk: +3 segment(s) at base, +0 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 (54.3611, -1.0613)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (54.3611, -1.0613)'"
 },
 "area": {
  "place": "Bransdale",
  "county": "North Yorkshire"
 }
}