{
 "ocl_version": "0.1.0",
 "name": "Pentre to Moat Hill",
 "slug": "discovered-lane-52-5153-3-0465",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.943378406655654,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 653.0,
   "end_distance_m": 655.0,
   "start_elevation_m": 209.49341141932067,
   "end_elevation_m": 210.39227898745378,
   "min_gradient_pct": -36.30463020569863,
   "suppressed_max_gradient_pct": 72.45145374792799,
   "suppressed_location_m": [
    294.0,
    296.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.82792345608357,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 653.0,
   "end_distance_m": 656.0,
   "start_elevation_m": 209.49341141932067,
   "end_elevation_m": 210.62824912300317,
   "min_gradient_pct": -35.0514008041254,
   "suppressed_max_gradient_pct": 64.70300165265333,
   "suppressed_location_m": [
    293.0,
    296.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.94680082870775,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 493.0,
   "end_distance_m": 498.0,
   "start_elevation_m": 190.6025437698323,
   "end_elevation_m": 192.19988381126768,
   "min_gradient_pct": -30.204813427462796,
   "suppressed_max_gradient_pct": 51.47739331352,
   "suppressed_location_m": [
    292.0,
    297.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.119211140237894,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 494.0,
   "end_distance_m": 504.0,
   "start_elevation_m": 190.84108588668943,
   "end_elevation_m": 193.65300700071322,
   "min_gradient_pct": -25.111444127081768,
   "suppressed_max_gradient_pct": 33.089512790084825,
   "suppressed_location_m": [
    287.0,
    297.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.652227855825345,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 489.0,
   "end_distance_m": 509.0,
   "start_elevation_m": 189.6218368923789,
   "end_elevation_m": 194.75228246354396,
   "min_gradient_pct": -20.543688439977785
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.312752253637996,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 486.0,
   "end_distance_m": 511.0,
   "start_elevation_m": 189.21245537879093,
   "end_elevation_m": 195.04064344220043,
   "min_gradient_pct": -18.54952274970651
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.49551489481189,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 393.0,
   "end_distance_m": 443.0,
   "start_elevation_m": 173.49418489055847,
   "end_elevation_m": 183.24194233796442,
   "min_gradient_pct": -14.132449856426831
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.15623484797672,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 404.0,
   "end_distance_m": 504.0,
   "start_elevation_m": 175.4967721527365,
   "end_elevation_m": 193.65300700071322,
   "min_gradient_pct": -10.909751684570237
  }
 ],
 "shape": {
  "ascent_concentration": 0.429,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 195.0,
  "shape_class": "sustained"
 },
 "length_m": 4355.099366717045,
 "start_elevation_m": 143.64076092437824,
 "end_elevation_m": 344.35209476623515,
 "endpoint_gain_m": 200.7113338418569,
 "overall_gradient_pct": 4.608651076385356,
 "accumulated_ascent_m": 264.53613095066663,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.94680082870775,
   "start_distance_m": 493.0,
   "end_distance_m": 498.0,
   "midpoint_distance_m": 495.5,
   "start_elevation_m": 190.6025437698323,
   "end_elevation_m": 192.19988381126768,
   "start_xy": [
    328235.8989050365,
    291585.20003354555
   ],
   "end_xy": [
    328240.7929563792,
    291584.17618714354
   ]
  },
  "max_10m": {
   "gradient_pct": 28.119211140237894,
   "start_distance_m": 494.0,
   "end_distance_m": 504.0,
   "midpoint_distance_m": 499.0,
   "start_elevation_m": 190.84108588668943,
   "end_elevation_m": 193.65300700071322,
   "start_xy": [
    328236.877715305,
    291584.99526426516
   ],
   "end_xy": [
    328246.66581799043,
    291582.94757146115
   ]
  },
  "max_20m": {
   "gradient_pct": 25.652227855825345,
   "start_distance_m": 489.0,
   "end_distance_m": 509.0,
   "midpoint_distance_m": 499.0,
   "start_elevation_m": 189.6218368923789,
   "end_elevation_m": 194.75228246354396,
   "start_xy": [
    328231.97243560257,
    291585.8956395294
   ],
   "end_xy": [
    328251.55986933317,
    291581.92372505914
   ]
  },
  "max_25m": {
   "gradient_pct": 23.312752253637996,
   "start_distance_m": 486.0,
   "end_distance_m": 511.0,
   "midpoint_distance_m": 498.5,
   "start_elevation_m": 189.21245537879093,
   "end_elevation_m": 195.04064344220043,
   "start_xy": [
    328228.973361734,
    291585.82110141194
   ],
   "end_xy": [
    328253.51748987025,
    291581.51418649836
   ]
  },
  "max_50m": {
   "gradient_pct": 19.49551489481189,
   "start_distance_m": 393.0,
   "end_distance_m": 443.0,
   "midpoint_distance_m": 418.0,
   "start_elevation_m": 173.49418489055847,
   "end_elevation_m": 183.24194233796442,
   "start_xy": [
    328136.0020718088,
    291583.51041977154
   ],
   "end_xy": [
    328185.9866362847,
    291584.75272172876
   ]
  },
  "max_100m": {
   "gradient_pct": 18.15623484797672,
   "start_distance_m": 404.0,
   "end_distance_m": 504.0,
   "midpoint_distance_m": 454.0,
   "start_elevation_m": 175.4967721527365,
   "end_elevation_m": 193.65300700071322,
   "start_xy": [
    328146.99867599347,
    291583.7837262021
   ],
   "end_xy": [
    328246.66581799043,
    291582.94757146115
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -30.204813427462796,
   "start_distance_m": 1829.0,
   "end_distance_m": 1834.0,
   "midpoint_distance_m": 1831.5,
   "start_elevation_m": 201.82781332285953,
   "end_elevation_m": 200.3175726514864,
   "start_xy": [
    329483.2088604256,
    291246.53414820606
   ],
   "end_xy": [
    329487.61354273395,
    291244.1679753969
   ]
  },
  "min_10m": {
   "gradient_pct": -25.111444127081768,
   "start_distance_m": 1428.0,
   "end_distance_m": 1438.0,
   "midpoint_distance_m": 1433.0,
   "start_elevation_m": 223.6372241222672,
   "end_elevation_m": 221.12607970955904,
   "start_xy": [
    329111.4734611431,
    291344.5813288928
   ],
   "end_xy": [
    329121.2996981463,
    291346.28831625136
   ]
  },
  "min_20m": {
   "gradient_pct": -20.543688439977785,
   "start_distance_m": 1427.0,
   "end_distance_m": 1447.0,
   "midpoint_distance_m": 1437.0,
   "start_elevation_m": 223.77740139147002,
   "end_elevation_m": 219.66866370347446,
   "start_xy": [
    329110.4801648872,
    291344.4657324046
   ],
   "end_xy": [
    329129.98132238275,
    291348.6609520465
   ]
  },
  "min_25m": {
   "gradient_pct": -18.54952274970651,
   "start_distance_m": 1427.0,
   "end_distance_m": 1452.0,
   "midpoint_distance_m": 1439.5,
   "start_elevation_m": 223.77740139147002,
   "end_elevation_m": 219.1400207040434,
   "start_xy": [
    329110.4801648872,
    291344.4657324046
   ],
   "end_xy": [
    329134.8044469586,
    291349.9790830439
   ]
  },
  "min_50m": {
   "gradient_pct": -14.132449856426831,
   "start_distance_m": 1427.0,
   "end_distance_m": 1477.0,
   "midpoint_distance_m": 1452.0,
   "start_elevation_m": 223.77740139147002,
   "end_elevation_m": 216.7111764632566,
   "start_xy": [
    329110.4801648872,
    291344.4657324046
   ],
   "end_xy": [
    329158.92006983765,
    291356.5697380305
   ]
  },
  "min_100m": {
   "gradient_pct": -10.909751684570237,
   "start_distance_m": 1407.0,
   "end_distance_m": 1507.0,
   "midpoint_distance_m": 1457.0,
   "start_elevation_m": 225.3001019787898,
   "end_elevation_m": 214.39035029421956,
   "start_xy": [
    329090.6142397699,
    291342.1538026411
   ],
   "end_xy": [
    329188.2587844493,
    291359.3536605541
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.943378406655654,
   "start_distance_m": 653.0,
   "end_distance_m": 655.0,
   "midpoint_distance_m": 654.0,
   "start_elevation_m": 209.49341141932067,
   "end_elevation_m": 210.39227898745378,
   "start_xy": [
    328384.77276018535,
    291529.38642735453
   ],
   "end_xy": [
    328386.65450770326,
    291528.70891257323
   ]
  },
  "max_3m": {
   "gradient_pct": 37.82792345608357,
   "start_distance_m": 653.0,
   "end_distance_m": 656.0,
   "midpoint_distance_m": 654.5,
   "start_elevation_m": 209.49341141932067,
   "end_elevation_m": 210.62824912300317,
   "start_xy": [
    328384.77276018535,
    291529.38642735453
   ],
   "end_xy": [
    328387.59538146225,
    291528.3701551826
   ]
  }
 },
 "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": 0.042,
   "obstruction_max_height_m": 17.66,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    50,
    100
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.001,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    293.0,
    298.0
   ]
  ],
  "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/SO2585.tif",
   "data/cache/england/bulk_dtm_1m/SO2590.tif"
  ],
  "calculated_at": "2026-08-15T14:56:13+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12-roads.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": [
   "SO2585.tif",
   "SO2590.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.9% over 200 m (Terrain 50), gain 102.9 m over 2581 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.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (52.5153, -3.0465)'"
 },
 "area": {
  "place": "Pentre",
  "county": "Powys - Powys"
 }
}