{
 "ocl_version": "0.1.0",
 "name": "Park Road",
 "slug": "park-road-3",
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.46182482258166,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 388.0,
   "end_distance_m": 390.0,
   "start_elevation_m": 244.58615424789315,
   "end_elevation_m": 245.17539074434478,
   "min_gradient_pct": -6.992665907716855
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.06374661633606,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 388.0,
   "end_distance_m": 391.0,
   "start_elevation_m": 244.58615424789315,
   "end_elevation_m": 245.45806664638323,
   "min_gradient_pct": -4.984303442495275
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.559640118626817,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 386.0,
   "end_distance_m": 391.0,
   "start_elevation_m": 244.0300846404519,
   "end_elevation_m": 245.45806664638323,
   "min_gradient_pct": -4.750640969214146
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.648419764526864,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 384.0,
   "end_distance_m": 394.0,
   "start_elevation_m": 243.4833562860934,
   "end_elevation_m": 246.24819826254608,
   "min_gradient_pct": -4.273948856487095
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.147163639387685,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 375.0,
   "end_distance_m": 395.0,
   "start_elevation_m": 241.27683977675161,
   "end_elevation_m": 246.50627250462915,
   "min_gradient_pct": -3.4026546182062134
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.801359750450843,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 370.0,
   "end_distance_m": 395.0,
   "start_elevation_m": 240.05593256701644,
   "end_elevation_m": 246.50627250462915,
   "min_gradient_pct": -2.6655077949562838
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.32183759352898,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 352.0,
   "end_distance_m": 402.0,
   "start_elevation_m": 236.10040184574066,
   "end_elevation_m": 247.26132064250515,
   "min_gradient_pct": 0.8083643170789401
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.64785700390081,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 353.0,
   "end_distance_m": 453.0,
   "start_elevation_m": 236.17155669250627,
   "end_elevation_m": 252.81941369640708,
   "min_gradient_pct": 1.7356716120423528
  }
 ],
 "length_m": 899.3476363118765,
 "start_elevation_m": 219.26496363876302,
 "end_elevation_m": 295.63862472534163,
 "endpoint_gain_m": 76.37366108657861,
 "overall_gradient_pct": 8.492117842192636,
 "accumulated_ascent_m": 77.60351756860481,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.559640118626817,
   "start_distance_m": 386.0,
   "end_distance_m": 391.0,
   "midpoint_distance_m": 388.5,
   "start_elevation_m": 244.0300846404519,
   "end_elevation_m": 245.45806664638323,
   "start_xy": [
    300021.9758722841,
    196388.9458997857
   ],
   "end_xy": [
    300018.0215287531,
    196385.88597049905
   ]
  },
  "max_10m": {
   "gradient_pct": 27.648419764526864,
   "start_distance_m": 384.0,
   "end_distance_m": 394.0,
   "midpoint_distance_m": 389.0,
   "start_elevation_m": 243.4833562860934,
   "end_elevation_m": 246.24819826254608,
   "start_xy": [
    300023.55760969647,
    196390.16987150034
   ],
   "end_xy": [
    300015.64892263454,
    196384.05001292707
   ]
  },
  "max_20m": {
   "gradient_pct": 26.147163639387685,
   "start_distance_m": 375.0,
   "end_distance_m": 395.0,
   "midpoint_distance_m": 385.0,
   "start_elevation_m": 241.27683977675161,
   "end_elevation_m": 246.50627250462915,
   "start_xy": [
    300030.67361168936,
    196395.68008780517
   ],
   "end_xy": [
    300014.85805392836,
    196383.43802706973
   ]
  },
  "max_25m": {
   "gradient_pct": 25.801359750450843,
   "start_distance_m": 370.0,
   "end_distance_m": 395.0,
   "midpoint_distance_m": 382.5,
   "start_elevation_m": 240.05593256701644,
   "end_elevation_m": 246.50627250462915,
   "start_xy": [
    300034.53427906136,
    196398.8563363925
   ],
   "end_xy": [
    300014.85805392836,
    196383.43802706973
   ]
  },
  "max_50m": {
   "gradient_pct": 22.32183759352898,
   "start_distance_m": 352.0,
   "end_distance_m": 402.0,
   "midpoint_distance_m": 377.0,
   "start_elevation_m": 236.10040184574066,
   "end_elevation_m": 247.26132064250515,
   "start_xy": [
    300048.3364717682,
    196410.41053374598
   ],
   "end_xy": [
    300011.9195333232,
    196378.77545991907
   ]
  },
  "max_100m": {
   "gradient_pct": 16.64785700390081,
   "start_distance_m": 353.0,
   "end_distance_m": 453.0,
   "midpoint_distance_m": 403.0,
   "start_elevation_m": 236.17155669250627,
   "end_elevation_m": 252.81941369640708,
   "start_xy": [
    300047.5696832845,
    196409.768633893
   ],
   "end_xy": [
    300043.6244318259,
    196339.0711227506
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.750640969214146,
   "start_distance_m": 811.0,
   "end_distance_m": 816.0,
   "midpoint_distance_m": 813.5,
   "start_elevation_m": 292.2407787527635,
   "end_elevation_m": 292.0032467043028,
   "start_xy": [
    300292.267632587,
    196085.2232680924
   ],
   "end_xy": [
    300295.99359039933,
    196081.8890157953
   ]
  },
  "min_10m": {
   "gradient_pct": -4.273948856487095,
   "start_distance_m": 808.0,
   "end_distance_m": 818.0,
   "midpoint_distance_m": 813.0,
   "start_elevation_m": 292.3589027997938,
   "end_elevation_m": 291.9315079141451,
   "start_xy": [
    300290.03205789963,
    196087.22381947067
   ],
   "end_xy": [
    300297.4839735243,
    196080.55531487646
   ]
  },
  "min_20m": {
   "gradient_pct": -3.4026546182062134,
   "start_distance_m": 805.0,
   "end_distance_m": 825.0,
   "midpoint_distance_m": 815.0,
   "start_elevation_m": 292.45378871410486,
   "end_elevation_m": 291.7732577904636,
   "start_xy": [
    300287.7964832122,
    196089.22437084894
   ],
   "end_xy": [
    300302.70031446154,
    196075.8873616605
   ]
  },
  "min_25m": {
   "gradient_pct": -2.6655077949562838,
   "start_distance_m": 802.0,
   "end_distance_m": 827.0,
   "midpoint_distance_m": 814.5,
   "start_elevation_m": 292.4468167723713,
   "end_elevation_m": 291.7804398236322,
   "start_xy": [
    300285.56090852484,
    196091.2249222272
   ],
   "end_xy": [
    300302.8210870705,
    196075.4796586387
   ]
  },
  "min_50m": {
   "gradient_pct": 0.8083643170789401,
   "start_distance_m": 302.0,
   "end_distance_m": 352.0,
   "midpoint_distance_m": 327.0,
   "start_elevation_m": 235.6962196872012,
   "end_elevation_m": 236.10040184574066,
   "start_xy": [
    300081.4887420463,
    196377.31080449844
   ],
   "end_xy": [
    300048.3364717682,
    196410.41053374598
   ]
  },
  "min_100m": {
   "gradient_pct": 1.7356716120423528,
   "start_distance_m": 252.0,
   "end_distance_m": 352.0,
   "midpoint_distance_m": 302.0,
   "start_elevation_m": 234.3647302336983,
   "end_elevation_m": 236.10040184574066,
   "start_xy": [
    300120.7636143705,
    196346.85859568245
   ],
   "end_xy": [
    300048.3364717682,
    196410.41053374598
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.46182482258166,
   "start_distance_m": 388.0,
   "end_distance_m": 390.0,
   "midpoint_distance_m": 389.0,
   "start_elevation_m": 244.58615424789315,
   "end_elevation_m": 245.17539074434478,
   "start_xy": [
    300020.3941348717,
    196387.72192807103
   ],
   "end_xy": [
    300018.8123974593,
    196386.49795635638
   ]
  },
  "max_3m": {
   "gradient_pct": 29.06374661633606,
   "start_distance_m": 388.0,
   "end_distance_m": 391.0,
   "midpoint_distance_m": 389.5,
   "start_elevation_m": 244.58615424789315,
   "end_elevation_m": 245.45806664638323,
   "start_xy": [
    300020.3941348717,
    196387.72192807103
   ],
   "end_xy": [
    300018.0215287531,
    196385.88597049905
   ]
  }
 },
 "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": 0.036,
   "obstruction_max_height_m": 8.47,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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_299196_20201224dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_5_300196_20201224dtm.tif"
  ],
  "calculated_at": "2026-08-12T09:11:05+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_299196_20201224dtm.tif",
   "wg_del_5_300196_20201224dtm.tif"
  ],
  "elevation_capture_dates": [
   "24-12-2020"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.9% over 200 m (Terrain 50), gain 43.3 m over 426 m way. EXTENDED by graph walk: +6 segment(s) at base, +1 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ROAD-REVIEW: way 243037076: unnamed service way; way 243037076: service way, surface untagged ADOPTED (notable slice 2026-08-11): clean-steep."
 },
 "area": {
  "place": "Rhondda Fach",
  "county": "Rhondda Cynon Taf - Rhondda Cynon Taf"
 },
 "reported_claims": [],
 "confidence": "A",
 "shape": {
  "ascent_concentration": 0.369,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 162.0,
  "shape_class": "sustained"
 }
}