{
 "ocl_version": "0.1.0",
 "name": "Hillside",
 "slug": "hillside-2",
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 51.36531880292097,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 162.0,
   "end_distance_m": 164.0,
   "start_elevation_m": 118.90557676006758,
   "end_elevation_m": 119.932883136126,
   "min_gradient_pct": -17.179456100516433
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 51.24212578851276,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 161.0,
   "end_distance_m": 164.0,
   "start_elevation_m": 118.39561936247061,
   "end_elevation_m": 119.932883136126,
   "min_gradient_pct": -15.813478704716507
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 49.013967043043465,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 161.0,
   "end_distance_m": 166.0,
   "start_elevation_m": 118.39561936247061,
   "end_elevation_m": 120.84631771462278,
   "min_gradient_pct": -11.214666626349015
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 31.188539682934362,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 159.0,
   "end_distance_m": 169.0,
   "start_elevation_m": 118.09990308025783,
   "end_elevation_m": 121.21875704855127,
   "min_gradient_pct": -4.3809312855077565
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.301413924347287,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 584.0,
   "end_distance_m": 604.0,
   "start_elevation_m": 180.16751606631703,
   "end_elevation_m": 184.2277988511865,
   "min_gradient_pct": -3.212953069800122
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.135594184169236,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 585.0,
   "end_distance_m": 610.0,
   "start_elevation_m": 180.36772757208163,
   "end_elevation_m": 185.40162611812394,
   "min_gradient_pct": -2.668051170516719
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.795193209074853,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 563.0,
   "end_distance_m": 613.0,
   "start_elevation_m": 176.08412054989932,
   "end_elevation_m": 185.98171715443675,
   "min_gradient_pct": 0.302019889990504
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.40018696525945,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 507.0,
   "end_distance_m": 607.0,
   "start_elevation_m": 165.41875649660506,
   "end_elevation_m": 184.8189434618645,
   "min_gradient_pct": 2.6644440210513807
  }
 ],
 "length_m": 714.1269429235801,
 "start_elevation_m": 112.72523724743601,
 "end_elevation_m": 201.96043326530307,
 "endpoint_gain_m": 89.23519601786705,
 "overall_gradient_pct": 12.495704986643567,
 "accumulated_ascent_m": 90.62642304199026,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 49.013967043043465,
   "start_distance_m": 161.0,
   "end_distance_m": 166.0,
   "midpoint_distance_m": 163.5,
   "start_elevation_m": 118.39561936247061,
   "end_elevation_m": 120.84631771462278,
   "start_xy": [
    321293.28706938395,
    198332.26580666666
   ],
   "end_xy": [
    321288.28763872525,
    198332.3412592255
   ]
  },
  "max_10m": {
   "gradient_pct": 31.188539682934362,
   "start_distance_m": 159.0,
   "end_distance_m": 169.0,
   "midpoint_distance_m": 164.0,
   "start_elevation_m": 118.09990308025783,
   "end_elevation_m": 121.21875704855127,
   "start_xy": [
    321295.2868416474,
    198332.2356256431
   ],
   "end_xy": [
    321285.28798033,
    198332.38653076082
   ]
  },
  "max_20m": {
   "gradient_pct": 20.301413924347287,
   "start_distance_m": 584.0,
   "end_distance_m": 604.0,
   "midpoint_distance_m": 594.0,
   "start_elevation_m": 180.16751606631703,
   "end_elevation_m": 184.2277988511865,
   "start_xy": [
    320936.86902442656,
    198385.5103626343
   ],
   "end_xy": [
    320917.088069419,
    198387.10000598108
   ]
  },
  "max_25m": {
   "gradient_pct": 20.135594184169236,
   "start_distance_m": 585.0,
   "end_distance_m": 610.0,
   "midpoint_distance_m": 597.5,
   "start_elevation_m": 180.36772757208163,
   "end_elevation_m": 185.40162611812394,
   "start_xy": [
    320935.8691622106,
    198385.51297091282
   ],
   "end_xy": [
    320911.3719055911,
    198388.92359340505
   ]
  },
  "max_50m": {
   "gradient_pct": 19.795193209074853,
   "start_distance_m": 563.0,
   "end_distance_m": 613.0,
   "midpoint_distance_m": 588.0,
   "start_elevation_m": 176.08412054989932,
   "end_elevation_m": 185.98171715443675,
   "start_xy": [
    320956.8232035917,
    198380.4147390708
   ],
   "end_xy": [
    320908.5519383387,
    198389.93953814858
   ]
  },
  "max_100m": {
   "gradient_pct": 19.40018696525945,
   "start_distance_m": 507.0,
   "end_distance_m": 607.0,
   "midpoint_distance_m": 557.0,
   "start_elevation_m": 165.41875649660506,
   "end_elevation_m": 184.8189434618645,
   "start_xy": [
    321008.96336827776,
    198362.5155453207
   ],
   "end_xy": [
    320914.22998750507,
    198388.01179969305
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.214666626349015,
   "start_distance_m": 147.0,
   "end_distance_m": 152.0,
   "midpoint_distance_m": 149.5,
   "start_elevation_m": 118.20295290710054,
   "end_elevation_m": 117.64221957578309,
   "start_xy": [
    321307.08122875134,
    198330.9532119504
   ],
   "end_xy": [
    321302.2860445696,
    198332.1299920607
   ]
  },
  "min_10m": {
   "gradient_pct": -4.3809312855077565,
   "start_distance_m": 145.0,
   "end_distance_m": 155.0,
   "midpoint_distance_m": 150.0,
   "start_elevation_m": 118.18644103585879,
   "end_elevation_m": 117.74834790730802,
   "start_xy": [
    321308.95883876993,
    198330.2643138316
   ],
   "end_xy": [
    321299.2863861744,
    198332.17526359603
   ]
  },
  "min_20m": {
   "gradient_pct": -3.212953069800122,
   "start_distance_m": 91.0,
   "end_distance_m": 111.0,
   "midpoint_distance_m": 101.0,
   "start_elevation_m": 116.9354069862972,
   "end_elevation_m": 116.29281637233717,
   "start_xy": [
    321282.620116711,
    198305.3207559741
   ],
   "end_xy": [
    321302.15083587414,
    198301.01366774985
   ]
  },
  "min_25m": {
   "gradient_pct": -2.668051170516719,
   "start_distance_m": 89.0,
   "end_distance_m": 114.0,
   "midpoint_distance_m": 101.5,
   "start_elevation_m": 117.00226639384965,
   "end_elevation_m": 116.33525360122047,
   "start_xy": [
    321280.8081749299,
    198305.53269104945
   ],
   "end_xy": [
    321303.5842896007,
    198302.71558084985
   ]
  },
  "min_50m": {
   "gradient_pct": 0.302019889990504,
   "start_distance_m": 85.0,
   "end_distance_m": 135.0,
   "midpoint_distance_m": 110.0,
   "start_elevation_m": 116.73628973298574,
   "end_elevation_m": 116.88729967798099,
   "start_xy": [
    321279.9825484038,
    198301.6188258449
   ],
   "end_xy": [
    321310.3129746011,
    198322.12703013318
   ]
  },
  "min_100m": {
   "gradient_pct": 2.6644440210513807,
   "start_distance_m": 33.0,
   "end_distance_m": 133.0,
   "midpoint_distance_m": 83.0,
   "start_elevation_m": 114.15557448537263,
   "end_elevation_m": 116.820018506424,
   "start_xy": [
    321269.93584692513,
    198251.19799198225
   ],
   "end_xy": [
    321309.0072664193,
    198320.6120627593
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 51.36531880292097,
   "start_distance_m": 162.0,
   "end_distance_m": 164.0,
   "midpoint_distance_m": 163.0,
   "start_elevation_m": 118.90557676006758,
   "end_elevation_m": 119.932883136126,
   "start_xy": [
    321292.2871832522,
    198332.28089717843
   ],
   "end_xy": [
    321290.2874109887,
    198332.31107820198
   ]
  },
  "max_3m": {
   "gradient_pct": 51.24212578851276,
   "start_distance_m": 161.0,
   "end_distance_m": 164.0,
   "midpoint_distance_m": 162.5,
   "start_elevation_m": 118.39561936247061,
   "end_elevation_m": 119.932883136126,
   "start_xy": [
    321293.28706938395,
    198332.26580666666
   ],
   "end_xy": [
    321290.2874109887,
    198332.31107820198
   ]
  }
 },
 "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": 12.4,
   "flagged_windows_m": [
    10,
    100
   ]
  },
  "review": [
   "max5_over_45",
   "short_window_divergence"
  ],
  "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_320198_20201224dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_5_321198_20201224dtm.tif"
  ],
  "calculated_at": "2026-08-12T00:52:45+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_320198_20201224dtm.tif",
   "wg_del_5_321198_20201224dtm.tif"
  ],
  "elevation_capture_dates": [
   "24-12-2020"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 17.3% over 200 m (Terrain 50), gain 25.5 m over 147 m way. EXTENDED by graph walk: +10 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 1 overlapping proposal(s): hillside-3 ROAD-REVIEW: way 245695975: unnamed service way; way 245695975: service way, surface untagged"
 },
 "area": {
  "place": "Swffryd",
  "county": "Blaenau Gwent - Blaenau Gwent"
 },
 "reported_claims": [],
 "confidence": "U",
 "shape": {
  "ascent_concentration": 0.364,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 449.0,
  "shape_class": "sustained"
 }
}