{
 "ocl_version": "0.1.0",
 "name": "Lower Stoney Road",
 "slug": "lower-stoney-road",
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.87004148884921,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 493.0,
   "end_distance_m": 495.0,
   "start_elevation_m": 258.87316781823444,
   "end_elevation_m": 259.7705686480114,
   "min_gradient_pct": -66.92627938029574,
   "suppressed_max_gradient_pct": 73.68131899802108,
   "suppressed_location_m": [
    459.0,
    461.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.81314637165375,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 543.0,
   "end_distance_m": 546.0,
   "start_elevation_m": 271.10090301595113,
   "end_elevation_m": 272.23529740710075,
   "min_gradient_pct": -50.43354322873105,
   "suppressed_max_gradient_pct": 58.87635586309822,
   "suppressed_location_m": [
    599.0,
    602.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.22207328425088,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 541.0,
   "end_distance_m": 546.0,
   "start_elevation_m": 270.5241937428882,
   "end_elevation_m": 272.23529740710075,
   "min_gradient_pct": -26.155542512469765,
   "suppressed_max_gradient_pct": 43.36720890870879,
   "suppressed_location_m": [
    597.0,
    602.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.856388369418937,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 567.0,
   "end_distance_m": 577.0,
   "start_elevation_m": 276.3613775984105,
   "end_elevation_m": 279.2470164353524,
   "min_gradient_pct": -8.251323967782298,
   "suppressed_max_gradient_pct": 31.742848357180264,
   "suppressed_location_m": [
    592.0,
    602.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.888048888784795,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 557.0,
   "end_distance_m": 577.0,
   "start_elevation_m": 273.86940665759545,
   "end_elevation_m": 279.2470164353524,
   "min_gradient_pct": -4.213801295541799
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 26.13009102346882,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 521.0,
   "end_distance_m": 546.0,
   "start_elevation_m": 265.70277465123354,
   "end_elevation_m": 272.23529740710075,
   "min_gradient_pct": -3.522165961663859
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 24.6729114578726,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 500.0,
   "end_distance_m": 550.0,
   "start_elevation_m": 260.52265984197226,
   "end_elevation_m": 272.85911557090856,
   "min_gradient_pct": -1.1864081253453378
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 23.407512192229486,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 484.0,
   "end_distance_m": 584.0,
   "start_elevation_m": 257.23182726806834,
   "end_elevation_m": 280.63933946029783,
   "min_gradient_pct": 0.05772838683216719,
   "suppressed_max_gradient_pct": 24.16882600964118,
   "suppressed_location_m": [
    502.0,
    602.0
   ]
  }
 ],
 "length_m": 622.7275312101834,
 "start_elevation_m": 225.4604246032831,
 "end_elevation_m": 287.9051223901358,
 "endpoint_gain_m": 62.444697786852686,
 "overall_gradient_pct": 10.027611540716723,
 "accumulated_ascent_m": 70.28413347585493,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.22207328425088,
   "start_distance_m": 541.0,
   "end_distance_m": 546.0,
   "midpoint_distance_m": 543.5,
   "start_elevation_m": 270.5241937428882,
   "end_elevation_m": 272.23529740710075,
   "start_xy": [
    326669.9533043213,
    204522.11823951852
   ],
   "end_xy": [
    326667.3473487465,
    204526.35614583225
   ]
  },
  "max_10m": {
   "gradient_pct": 28.856388369418937,
   "start_distance_m": 567.0,
   "end_distance_m": 577.0,
   "midpoint_distance_m": 572.0,
   "start_elevation_m": 276.3613775984105,
   "end_elevation_m": 279.2470164353524,
   "start_xy": [
    326655.9616382202,
    204543.96815422844
   ],
   "end_xy": [
    326648.3128377376,
    204549.6923072818
   ]
  },
  "max_20m": {
   "gradient_pct": 26.888048888784795,
   "start_distance_m": 557.0,
   "end_distance_m": 577.0,
   "midpoint_distance_m": 567.0,
   "start_elevation_m": 273.86940665759545,
   "end_elevation_m": 279.2470164353524,
   "start_xy": [
    326661.6872380239,
    204535.7858700453
   ],
   "end_xy": [
    326648.3128377376,
    204549.6923072818
   ]
  },
  "max_25m": {
   "gradient_pct": 26.13009102346882,
   "start_distance_m": 521.0,
   "end_distance_m": 546.0,
   "midpoint_distance_m": 533.5,
   "start_elevation_m": 265.70277465123354,
   "end_elevation_m": 272.23529740710075,
   "start_xy": [
    326686.82606944104,
    204512.070811768
   ],
   "end_xy": [
    326667.3473487465,
    204526.35614583225
   ]
  },
  "max_50m": {
   "gradient_pct": 24.6729114578726,
   "start_distance_m": 500.0,
   "end_distance_m": 550.0,
   "midpoint_distance_m": 525.0,
   "start_elevation_m": 260.52265984197226,
   "end_elevation_m": 272.85911557090856,
   "start_xy": [
    326698.5316149123,
    204495.78979480773
   ],
   "end_xy": [
    326665.33001335984,
    204529.80994823546
   ]
  },
  "max_100m": {
   "gradient_pct": 23.407512192229486,
   "start_distance_m": 484.0,
   "end_distance_m": 584.0,
   "midpoint_distance_m": 534.0,
   "start_elevation_m": 257.23182726806834,
   "end_elevation_m": 280.63933946029783,
   "start_xy": [
    326702.8410551896,
    204480.6928147379
   ],
   "end_xy": [
    326641.56521014136,
    204551.49336786606
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -26.155542512469765,
   "start_distance_m": 206.0,
   "end_distance_m": 211.0,
   "midpoint_distance_m": 208.5,
   "start_elevation_m": 228.19391431592368,
   "end_elevation_m": 226.8861371903002,
   "start_xy": [
    326879.2154833223,
    204475.7306875203
   ],
   "end_xy": [
    326876.0543549229,
    204471.85676609067
   ]
  },
  "min_10m": {
   "gradient_pct": -8.251323967782298,
   "start_distance_m": 34.0,
   "end_distance_m": 44.0,
   "midpoint_distance_m": 39.0,
   "start_elevation_m": 226.38941041840815,
   "end_elevation_m": 225.56427802162992,
   "start_xy": [
    326940.8204758321,
    204631.79575205315
   ],
   "end_xy": [
    326939.1241451945,
    204621.94067912758
   ]
  },
  "min_20m": {
   "gradient_pct": -4.213801295541799,
   "start_distance_m": 175.0,
   "end_distance_m": 195.0,
   "midpoint_distance_m": 185.0,
   "start_elevation_m": 227.28996135606923,
   "end_elevation_m": 226.44720109696087,
   "start_xy": [
    326898.46849549044,
    204500.00637624305
   ],
   "end_xy": [
    326886.19647482556,
    204484.2315841974
   ]
  },
  "min_25m": {
   "gradient_pct": -3.522165961663859,
   "start_distance_m": 175.0,
   "end_distance_m": 200.0,
   "midpoint_distance_m": 187.5,
   "start_elevation_m": 227.28996135606923,
   "end_elevation_m": 226.40941986565326,
   "start_xy": [
    326898.46849549044,
    204500.00637624305
   ],
   "end_xy": [
    326883.01803257846,
    204480.37185559527
   ]
  },
  "min_50m": {
   "gradient_pct": -1.1864081253453378,
   "start_distance_m": 152.0,
   "end_distance_m": 202.0,
   "midpoint_distance_m": 177.0,
   "start_elevation_m": 226.97981100967968,
   "end_elevation_m": 226.386606947007,
   "start_xy": [
    326911.5647185377,
    204518.90777272193
   ],
   "end_xy": [
    326881.74665567966,
    204478.82796415442
   ]
  },
  "min_100m": {
   "gradient_pct": 0.05772838683216719,
   "start_distance_m": 101.0,
   "end_distance_m": 201.0,
   "midpoint_distance_m": 151.0,
   "start_elevation_m": 226.32390873931308,
   "end_elevation_m": 226.38163712614525,
   "start_xy": [
    326929.585500526,
    204565.744670727
   ],
   "end_xy": [
    326882.3823441291,
    204479.59990987484
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.87004148884921,
   "start_distance_m": 493.0,
   "end_distance_m": 495.0,
   "midpoint_distance_m": 494.0,
   "start_elevation_m": 258.87316781823444,
   "end_elevation_m": 259.7705686480114,
   "start_xy": [
    326701.708338177,
    204489.55213264152
   ],
   "end_xy": [
    326700.80070295854,
    204491.33432183188
   ]
  },
  "max_3m": {
   "gradient_pct": 37.81314637165375,
   "start_distance_m": 543.0,
   "end_distance_m": 546.0,
   "midpoint_distance_m": 544.5,
   "start_elevation_m": 271.10090301595113,
   "end_elevation_m": 272.23529740710075,
   "start_xy": [
    326668.70878062263,
    204523.6838578512
   ],
   "end_xy": [
    326667.3473487465,
    204526.35614583225
   ]
  }
 },
 "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": 0.321,
   "obstruction_max_height_m": 17.34,
   "flagged_windows_m": [
    2,
    20,
    25,
    50,
    100
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.029,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    205.0,
    210.0
   ],
   [
    458.0,
    463.0
   ],
   [
    598.0,
    603.0
   ]
  ],
  "review": [],
  "extent": [
   "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/wales/dtm_1m/wg_del_10_326204_20210227dtm.tif"
  ],
  "calculated_at": "2026-08-12T09:10:51+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/wales-2026-08-11.osm.pbf",
  "osm_snapshot": "2026-08-10T20:21:40Z",
  "elevation_provider": "Welsh Government",
  "elevation_dataset": "Welsh Government LiDAR 1m DTM (2020-2023)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Crown copyright Welsh Government",
  "elevation_catalogue_layer": "geonode:welsh_government_lidar_tile_catalogue_2020_2023",
  "elevation_tile_ids": [
   "wg_del_10_326204_20210227dtm.tif"
  ],
  "elevation_capture_dates": [
   "27-02-2021"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 8.3% over 200 m (Terrain 50), gain 20.4 m over 376 m way. EXTENDED by graph walk: +0 segment(s) at base, +3 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ROAD-REVIEW: way 867687343: unnamed service way; way 867687343: service way, surface untagged ADOPTED (notable slice 2026-08-11): qualified-steep."
 },
 "area": {
  "place": "Victoria Village",
  "county": "Torfaen - Torfaen"
 },
 "reported_claims": [],
 "confidence": "B",
 "shape": {
  "ascent_concentration": 0.485,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 143.0,
  "shape_class": "stepped"
 }
}