{
 "ocl_version": "0.1.0",
 "name": "Kiln Lane",
 "slug": "kiln-lane",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.8656131558909,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 363.0,
   "end_distance_m": 365.0,
   "start_elevation_m": 44.47733647839253,
   "end_elevation_m": 45.23464874151035,
   "min_gradient_pct": -23.221375563731073
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 34.54020351124333,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 363.0,
   "end_distance_m": 366.0,
   "start_elevation_m": 44.47733647839253,
   "end_elevation_m": 45.51354258372983,
   "min_gradient_pct": -21.568002135371483
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.551982814097755,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 361.0,
   "end_distance_m": 366.0,
   "start_elevation_m": 43.88594344302494,
   "end_elevation_m": 45.51354258372983,
   "min_gradient_pct": -14.615216769333443
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.007009608596082,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 361.0,
   "end_distance_m": 371.0,
   "start_elevation_m": 43.88594344302494,
   "end_elevation_m": 46.68664440388455,
   "min_gradient_pct": -14.170928976390405
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.007560430480716,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 356.0,
   "end_distance_m": 376.0,
   "start_elevation_m": 43.07161609921218,
   "end_elevation_m": 47.67312818530832,
   "min_gradient_pct": -12.80683771976353
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.013596720357697,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 351.0,
   "end_distance_m": 376.0,
   "start_elevation_m": 42.4197290052189,
   "end_elevation_m": 47.67312818530832,
   "min_gradient_pct": -11.85251986017208
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 15.400278264797109,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 329.0,
   "end_distance_m": 379.0,
   "start_elevation_m": 40.31697555525875,
   "end_elevation_m": 48.017114687657305,
   "min_gradient_pct": -7.364174758941598
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.983167032546099,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 279.0,
   "end_distance_m": 379.0,
   "start_elevation_m": 35.033947655111206,
   "end_elevation_m": 48.017114687657305,
   "min_gradient_pct": -1.5813846533309501
  }
 ],
 "shape": {
  "ascent_concentration": 0.353,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 91.0,
  "shape_class": "sustained"
 },
 "length_m": 902.8210978109792,
 "start_elevation_m": 17.76402398867648,
 "end_elevation_m": 83.18938878630681,
 "endpoint_gain_m": 65.42536479763032,
 "overall_gradient_pct": 7.246769593252043,
 "accumulated_ascent_m": 74.10109772320018,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.551982814097755,
   "start_distance_m": 361.0,
   "end_distance_m": 366.0,
   "midpoint_distance_m": 363.5,
   "start_elevation_m": 43.88594344302494,
   "end_elevation_m": 45.51354258372983,
   "start_xy": [
    281044.3584466061,
    42906.73143988298
   ],
   "end_xy": [
    281043.48641361046,
    42911.65480800968
   ]
  },
  "max_10m": {
   "gradient_pct": 28.007009608596082,
   "start_distance_m": 361.0,
   "end_distance_m": 371.0,
   "midpoint_distance_m": 366.0,
   "start_elevation_m": 43.88594344302494,
   "end_elevation_m": 46.68664440388455,
   "start_xy": [
    281044.3584466061,
    42906.73143988298
   ],
   "end_xy": [
    281042.6143495807,
    42916.57817047691
   ]
  },
  "max_20m": {
   "gradient_pct": 23.007560430480716,
   "start_distance_m": 356.0,
   "end_distance_m": 376.0,
   "midpoint_distance_m": 366.0,
   "start_elevation_m": 43.07161609921218,
   "end_elevation_m": 47.67312818530832,
   "start_xy": [
    281045.2303703983,
    42901.80805263025
   ],
   "end_xy": [
    281041.7422498248,
    42921.50152669926
   ]
  },
  "max_25m": {
   "gradient_pct": 21.013596720357697,
   "start_distance_m": 351.0,
   "end_distance_m": 376.0,
   "midpoint_distance_m": 363.5,
   "start_elevation_m": 42.4197290052189,
   "end_elevation_m": 47.67312818530832,
   "start_xy": [
    281046.1032280381,
    42896.88483075686
   ],
   "end_xy": [
    281041.7422498248,
    42921.50152669926
   ]
  },
  "max_50m": {
   "gradient_pct": 15.400278264797109,
   "start_distance_m": 329.0,
   "end_distance_m": 379.0,
   "midpoint_distance_m": 354.0,
   "start_elevation_m": 40.31697555525875,
   "end_elevation_m": 48.017114687657305,
   "start_xy": [
    281049.9403714438,
    42875.22204671171
   ],
   "end_xy": [
    281041.2192395432,
    42924.45558451146
   ]
  },
  "max_100m": {
   "gradient_pct": 12.983167032546099,
   "start_distance_m": 279.0,
   "end_distance_m": 379.0,
   "midpoint_distance_m": 329.0,
   "start_elevation_m": 35.033947655111206,
   "end_elevation_m": 48.017114687657305,
   "start_xy": [
    281084.5692554794,
    42851.002595646256
   ],
   "end_xy": [
    281041.2192395432,
    42924.45558451146
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -14.615216769333443,
   "start_distance_m": 2.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 17.575964626982415,
   "end_elevation_m": 16.845203788515743,
   "start_xy": [
    281264.65700639953,
    42663.71090020748
   ],
   "end_xy": [
    281264.33901404875,
    42668.70077744941
   ]
  },
  "min_10m": {
   "gradient_pct": -14.170928976390405,
   "start_distance_m": 2.0,
   "end_distance_m": 12.0,
   "midpoint_distance_m": 7.0,
   "start_elevation_m": 17.575964626982415,
   "end_elevation_m": 16.158871729343375,
   "start_xy": [
    281264.65700639953,
    42663.71090020748
   ],
   "end_xy": [
    281264.0200257981,
    42673.69059132498
   ]
  },
  "min_20m": {
   "gradient_pct": -12.80683771976353,
   "start_distance_m": 1.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 17.702652814149904,
   "end_elevation_m": 15.141285270197198,
   "start_xy": [
    281264.72100319975,
    42662.71295010374
   ],
   "end_xy": [
    281263.44299526577,
    42682.672073824484
   ]
  },
  "min_25m": {
   "gradient_pct": -11.85251986017208,
   "start_distance_m": 1.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 13.5,
   "start_elevation_m": 17.702652814149904,
   "end_elevation_m": 14.739522849106883,
   "start_xy": [
    281264.72100319975,
    42662.71295010374
   ],
   "end_xy": [
    281262.5460126858,
    42687.563513218214
   ]
  },
  "min_50m": {
   "gradient_pct": -7.364174758941598,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 17.76402398867648,
   "end_elevation_m": 14.081936609205682,
   "start_xy": [
    281264.785,
    42661.715
   ],
   "end_xy": [
    281255.5410255437,
    42710.518471077725
   ]
  },
  "min_100m": {
   "gradient_pct": -1.5813846533309501,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 17.76402398867648,
   "end_elevation_m": 16.18263933534553,
   "start_xy": [
    281264.785,
    42661.715
   ],
   "end_xy": [
    281227.7863604661,
    42751.38231894048
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.8656131558909,
   "start_distance_m": 363.0,
   "end_distance_m": 365.0,
   "midpoint_distance_m": 364.0,
   "start_elevation_m": 44.47733647839253,
   "end_elevation_m": 45.23464874151035,
   "start_xy": [
    281044.009423855,
    42908.70075001637
   ],
   "end_xy": [
    281043.6611632912,
    42910.67019518979
   ]
  },
  "max_3m": {
   "gradient_pct": 34.54020351124333,
   "start_distance_m": 363.0,
   "end_distance_m": 366.0,
   "midpoint_distance_m": 364.5,
   "start_elevation_m": 44.47733647839253,
   "end_elevation_m": 45.51354258372983,
   "start_xy": [
    281044.009423855,
    42908.70075001637
   ],
   "end_xy": [
    281043.48641361046,
    42911.65480800968
   ]
  }
 },
 "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": 0.035,
   "obstruction_max_height_m": 6.65,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "descends_at_start",
   "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/SX8040.tif"
  ],
  "calculated_at": "2026-08-19T18:38:41+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": [
   "SX8040.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.5% over 200 m (Terrain 50), gain 33.0 m over 398 m way. EXTENDED by graph walk: +0 segment(s) at base, +2 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 1 overlapping proposal(s): discovered-lane-50-2757-3-6753 ADOPTED (England launch slice 2026-08-16): clean-steep."
 },
 "area": {
  "place": "Stokenham",
  "county": "Devon"
 }
}