{
 "ocl_version": "0.1.0",
 "name": "Charles Street",
 "slug": "charles-street",
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.920133517502506,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 825.0,
   "end_distance_m": 827.0,
   "start_elevation_m": 221.24352702531334,
   "end_elevation_m": 221.7219296956634,
   "min_gradient_pct": -11.565885542385956
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.195049683601116,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 825.0,
   "end_distance_m": 828.0,
   "start_elevation_m": 221.24352702531334,
   "end_elevation_m": 221.93937851582137,
   "min_gradient_pct": -6.485215382428085
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.157533835886625,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 835.0,
   "end_distance_m": 840.0,
   "start_elevation_m": 223.34869535941692,
   "end_elevation_m": 224.45657205121125,
   "min_gradient_pct": -4.586052443134463
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.766773855914607,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 835.0,
   "end_distance_m": 845.0,
   "start_elevation_m": 223.34869535941692,
   "end_elevation_m": 225.52537274500838,
   "min_gradient_pct": -3.203760108585527
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.40922859847521,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 825.0,
   "end_distance_m": 845.0,
   "start_elevation_m": 221.24352702531334,
   "end_elevation_m": 225.52537274500838,
   "min_gradient_pct": -1.6145042051735459
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.669781635848608,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 825.0,
   "end_distance_m": 850.0,
   "start_elevation_m": 221.24352702531334,
   "end_elevation_m": 226.4109724342755,
   "min_gradient_pct": -1.2390573080506329
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.224205968485535,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 825.0,
   "end_distance_m": 875.0,
   "start_elevation_m": 221.24352702531334,
   "end_elevation_m": 230.3556300095561,
   "min_gradient_pct": 2.4181516856444887
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.31528448354129,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 815.0,
   "end_distance_m": 915.0,
   "start_elevation_m": 221.15781567080407,
   "end_elevation_m": 235.47310015434536,
   "min_gradient_pct": 6.2156984264193795
  }
 ],
 "length_m": 915.4899513327564,
 "start_elevation_m": 138.58336162695352,
 "end_elevation_m": 235.57013364709815,
 "endpoint_gain_m": 96.98677202014463,
 "overall_gradient_pct": 10.593974502827995,
 "accumulated_ascent_m": 98.66297107723045,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.157533835886625,
   "start_distance_m": 835.0,
   "end_distance_m": 840.0,
   "midpoint_distance_m": 837.5,
   "start_elevation_m": 223.34869535941692,
   "end_elevation_m": 224.45657205121125,
   "start_xy": [
    298584.9240475193,
    192962.79061463487
   ],
   "end_xy": [
    298587.33216855966,
    192967.1725038456
   ]
  },
  "max_10m": {
   "gradient_pct": 21.766773855914607,
   "start_distance_m": 835.0,
   "end_distance_m": 845.0,
   "midpoint_distance_m": 840.0,
   "start_elevation_m": 223.34869535941692,
   "end_elevation_m": 225.52537274500838,
   "start_xy": [
    298584.9240475193,
    192962.79061463487
   ],
   "end_xy": [
    298589.7402896,
    192971.5543930563
   ]
  },
  "max_20m": {
   "gradient_pct": 21.40922859847521,
   "start_distance_m": 825.0,
   "end_distance_m": 845.0,
   "midpoint_distance_m": 835.0,
   "start_elevation_m": 221.24352702531334,
   "end_elevation_m": 225.52537274500838,
   "start_xy": [
    298582.10478806566,
    192953.39832101998
   ],
   "end_xy": [
    298589.7402896,
    192971.5543930563
   ]
  },
  "max_25m": {
   "gradient_pct": 20.669781635848608,
   "start_distance_m": 825.0,
   "end_distance_m": 850.0,
   "midpoint_distance_m": 837.5,
   "start_elevation_m": 221.24352702531334,
   "end_elevation_m": 226.4109724342755,
   "start_xy": [
    298582.10478806566,
    192953.39832101998
   ],
   "end_xy": [
    298592.14841064037,
    192975.93628226704
   ]
  },
  "max_50m": {
   "gradient_pct": 18.224205968485535,
   "start_distance_m": 825.0,
   "end_distance_m": 875.0,
   "midpoint_distance_m": 850.0,
   "start_elevation_m": 221.24352702531334,
   "end_elevation_m": 230.3556300095561,
   "start_xy": [
    298582.10478806566,
    192953.39832101998
   ],
   "end_xy": [
    298602.7420690037,
    192998.4488188389
   ]
  },
  "max_100m": {
   "gradient_pct": 14.31528448354129,
   "start_distance_m": 815.0,
   "end_distance_m": 915.0,
   "midpoint_distance_m": 865.0,
   "start_elevation_m": 221.15781567080407,
   "end_elevation_m": 235.47310015434536,
   "start_xy": [
    298591.74141729955,
    192952.40522533702
   ],
   "end_xy": [
    298568.617255671,
    193017.421054605
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.586052443134463,
   "start_distance_m": 718.0,
   "end_distance_m": 723.0,
   "midpoint_distance_m": 720.5,
   "start_elevation_m": 212.50865097962432,
   "end_elevation_m": 212.2793483574676,
   "start_xy": [
    298654.8984071983,
    192917.45325800288
   ],
   "end_xy": [
    298650.03256310354,
    192916.30279668455
   ]
  },
  "min_10m": {
   "gradient_pct": -3.203760108585527,
   "start_distance_m": 713.0,
   "end_distance_m": 723.0,
   "midpoint_distance_m": 718.0,
   "start_elevation_m": 212.59972436832615,
   "end_elevation_m": 212.2793483574676,
   "start_xy": [
    298659.76425129315,
    192918.60371932117
   ],
   "end_xy": [
    298650.03256310354,
    192916.30279668455
   ]
  },
  "min_20m": {
   "gradient_pct": -1.6145042051735459,
   "start_distance_m": 703.0,
   "end_distance_m": 723.0,
   "midpoint_distance_m": 713.0,
   "start_elevation_m": 212.6022491985023,
   "end_elevation_m": 212.2793483574676,
   "start_xy": [
    298669.49593948276,
    192920.90464195778
   ],
   "end_xy": [
    298650.03256310354,
    192916.30279668455
   ]
  },
  "min_25m": {
   "gradient_pct": -1.2390573080506329,
   "start_distance_m": 698.0,
   "end_distance_m": 723.0,
   "midpoint_distance_m": 710.5,
   "start_elevation_m": 212.58911268448026,
   "end_elevation_m": 212.2793483574676,
   "start_xy": [
    298674.3617835776,
    192922.0551032761
   ],
   "end_xy": [
    298650.03256310354,
    192916.30279668455
   ]
  },
  "min_50m": {
   "gradient_pct": 2.4181516856444887,
   "start_distance_m": 674.0,
   "end_distance_m": 724.0,
   "midpoint_distance_m": 699.0,
   "start_elevation_m": 211.13983650556415,
   "end_elevation_m": 212.3489123483864,
   "start_xy": [
    298697.7501350419,
    192927.43746651997
   ],
   "end_xy": [
    298649.68684726424,
    192916.82735648088
   ]
  },
  "min_100m": {
   "gradient_pct": 6.2156984264193795,
   "start_distance_m": 624.0,
   "end_distance_m": 724.0,
   "midpoint_distance_m": 674.0,
   "start_elevation_m": 206.133213921967,
   "end_elevation_m": 212.3489123483864,
   "start_xy": [
    298746.525455414,
    192938.43601745163
   ],
   "end_xy": [
    298649.68684726424,
    192916.82735648088
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.920133517502506,
   "start_distance_m": 825.0,
   "end_distance_m": 827.0,
   "midpoint_distance_m": 826.0,
   "start_elevation_m": 221.24352702531334,
   "end_elevation_m": 221.7219296956634,
   "start_xy": [
    298582.10478806566,
    192953.39832101998
   ],
   "end_xy": [
    298582.31903156545,
    192955.3868128411
   ]
  },
  "max_3m": {
   "gradient_pct": 23.195049683601116,
   "start_distance_m": 825.0,
   "end_distance_m": 828.0,
   "midpoint_distance_m": 826.5,
   "start_elevation_m": 221.24352702531334,
   "end_elevation_m": 221.93937851582137,
   "start_xy": [
    298582.10478806566,
    192953.39832101998
   ],
   "end_xy": [
    298582.42615331535,
    192956.3810587517
   ]
  }
 },
 "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": 0.051,
   "obstruction_max_height_m": 7.69,
   "flagged_windows_m": []
  },
  "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_5_298192_20201224dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_5_298193_20201224dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_5_299192_20201224dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_5_299193_20201224dtm.tif"
  ],
  "calculated_at": "2026-08-12T09:06:23+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_5_298192_20201224dtm.tif",
   "wg_del_5_298193_20201224dtm.tif",
   "wg_del_5_299192_20201224dtm.tif",
   "wg_del_5_299193_20201224dtm.tif"
  ],
  "elevation_capture_dates": [
   "24-12-2020"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.2% over 200 m (Terrain 50), gain 32.7 m over 310 m way. EXTENDED by graph walk: +7 segment(s) at base, +6 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 2 overlapping proposal(s): berw-road, thomas-street-5 ROAD-REVIEW: way 849070220: unnamed service way; way 849070220: service way, surface untagged; way 1288619470: unnamed service way; way 1288619470: service way, surface untagged ADOPTED (notable slice 2026-08-11): clean-steep."
 },
 "area": {
  "place": "Trealaw",
  "county": "Rhondda Cynon Taf - Rhondda Cynon Taf"
 },
 "reported_claims": [],
 "confidence": "A",
 "shape": {
  "ascent_concentration": 0.285,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 170.0,
  "shape_class": "sustained"
 }
}