{
 "ocl_version": "0.1.0",
 "name": "Lon Golff",
 "slug": "lon-golff",
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 49.55341899116199,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 467.0,
   "end_distance_m": 469.0,
   "start_elevation_m": 51.392814403083555,
   "end_elevation_m": 52.383882782906795,
   "min_gradient_pct": -23.156922931197954,
   "suppressed_max_gradient_pct": 54.923495787038235,
   "suppressed_location_m": [
    578.0,
    580.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 43.30437550887586,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 467.0,
   "end_distance_m": 470.0,
   "start_elevation_m": 51.392814403083555,
   "end_elevation_m": 52.69194566834983,
   "min_gradient_pct": -19.799073056347776
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.141829787772508,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 258.0,
   "end_distance_m": 263.0,
   "start_elevation_m": 24.269116803126895,
   "end_elevation_m": 25.82620829251552,
   "min_gradient_pct": -12.231872032675568,
   "suppressed_max_gradient_pct": 32.939588956809445,
   "suppressed_location_m": [
    575.0,
    580.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 30.62617348005933,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 258.0,
   "end_distance_m": 268.0,
   "start_elevation_m": 24.269116803126895,
   "end_elevation_m": 27.331734151132828,
   "min_gradient_pct": -7.685308146425243
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.791150452120455,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 252.0,
   "end_distance_m": 272.0,
   "start_elevation_m": 23.279144202689157,
   "end_elevation_m": 28.437374293113248,
   "min_gradient_pct": -6.830010326839293
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.738639509240073,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 251.0,
   "end_distance_m": 276.0,
   "start_elevation_m": 23.12569899074081,
   "end_elevation_m": 29.060358868050827,
   "min_gradient_pct": -6.864476585288145
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.37912742116496,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 222.0,
   "end_distance_m": 272.0,
   "start_elevation_m": 18.747810582530768,
   "end_elevation_m": 28.437374293113248,
   "min_gradient_pct": -6.114488080825481
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.859837588159039,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 186.0,
   "end_distance_m": 286.0,
   "start_elevation_m": 14.788707923386092,
   "end_elevation_m": 30.64854551154513,
   "min_gradient_pct": -3.789465370486795
  }
 ],
 "length_m": 906.6103534736748,
 "start_elevation_m": 3.2476598822324427,
 "end_elevation_m": 61.96700635215821,
 "endpoint_gain_m": 58.71934646992577,
 "overall_gradient_pct": 6.476800782711424,
 "accumulated_ascent_m": 70.24244653993226,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.141829787772508,
   "start_distance_m": 258.0,
   "end_distance_m": 263.0,
   "midpoint_distance_m": 260.5,
   "start_elevation_m": 24.269116803126895,
   "end_elevation_m": 25.82620829251552,
   "start_xy": [
    231551.52792808288,
    326390.7991166798
   ],
   "end_xy": [
    231550.10053292057,
    326386.00719190465
   ]
  },
  "max_10m": {
   "gradient_pct": 30.62617348005933,
   "start_distance_m": 258.0,
   "end_distance_m": 268.0,
   "midpoint_distance_m": 263.0,
   "start_elevation_m": 24.269116803126895,
   "end_elevation_m": 27.331734151132828,
   "start_xy": [
    231551.52792808288,
    326390.7991166798
   ],
   "end_xy": [
    231548.67313775828,
    326381.2152671295
   ]
  },
  "max_20m": {
   "gradient_pct": 25.791150452120455,
   "start_distance_m": 252.0,
   "end_distance_m": 272.0,
   "midpoint_distance_m": 262.0,
   "start_elevation_m": 23.279144202689157,
   "end_elevation_m": 28.437374293113248,
   "start_xy": [
    231553.24080227764,
    326396.54942640994
   ],
   "end_xy": [
    231547.53122162842,
    326377.3817273094
   ]
  },
  "max_25m": {
   "gradient_pct": 23.738639509240073,
   "start_distance_m": 251.0,
   "end_distance_m": 276.0,
   "midpoint_distance_m": 263.5,
   "start_elevation_m": 23.12569899074081,
   "end_elevation_m": 29.060358868050827,
   "start_xy": [
    231553.5262813101,
    326397.507811365
   ],
   "end_xy": [
    231546.3893054986,
    326373.5481874893
   ]
  },
  "max_50m": {
   "gradient_pct": 19.37912742116496,
   "start_distance_m": 222.0,
   "end_distance_m": 272.0,
   "midpoint_distance_m": 247.0,
   "start_elevation_m": 18.747810582530768,
   "end_elevation_m": 28.437374293113248,
   "start_xy": [
    231576.19017786242,
    326409.66477358894
   ],
   "end_xy": [
    231547.53122162842,
    326377.3817273094
   ]
  },
  "max_100m": {
   "gradient_pct": 15.859837588159039,
   "start_distance_m": 186.0,
   "end_distance_m": 286.0,
   "midpoint_distance_m": 236.0,
   "start_elevation_m": 14.788707923386092,
   "end_elevation_m": 30.64854551154513,
   "start_xy": [
    231608.09899450195,
    326423.72452630405
   ],
   "end_xy": [
    231543.534515174,
    326363.964337939
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.231872032675568,
   "start_distance_m": 605.0,
   "end_distance_m": 610.0,
   "midpoint_distance_m": 607.5,
   "start_elevation_m": 60.35173102078199,
   "end_elevation_m": 59.74013741914821,
   "start_xy": [
    231367.8643729823,
    326137.79535751266
   ],
   "end_xy": [
    231364.1135518299,
    326134.48909970623
   ]
  },
  "min_10m": {
   "gradient_pct": -7.685308146425243,
   "start_distance_m": 813.0,
   "end_distance_m": 823.0,
   "midpoint_distance_m": 818.0,
   "start_elevation_m": 64.4948603640114,
   "end_elevation_m": 63.72632954936888,
   "start_xy": [
    231282.43144498512,
    325963.35236572905
   ],
   "end_xy": [
    231279.66918507792,
    325953.7414386039
   ]
  },
  "min_20m": {
   "gradient_pct": -6.830010326839293,
   "start_distance_m": 803.0,
   "end_distance_m": 823.0,
   "midpoint_distance_m": 813.0,
   "start_elevation_m": 65.09233161473674,
   "end_elevation_m": 63.72632954936888,
   "start_xy": [
    231285.19370489233,
    325972.9632928542
   ],
   "end_xy": [
    231279.66918507792,
    325953.7414386039
   ]
  },
  "min_25m": {
   "gradient_pct": -6.864476585288145,
   "start_distance_m": 798.0,
   "end_distance_m": 823.0,
   "midpoint_distance_m": 810.5,
   "start_elevation_m": 65.44244869569091,
   "end_elevation_m": 63.72632954936888,
   "start_xy": [
    231286.57483484593,
    325977.7687564168
   ],
   "end_xy": [
    231279.66918507792,
    325953.7414386039
   ]
  },
  "min_50m": {
   "gradient_pct": -6.114488080825481,
   "start_distance_m": 795.0,
   "end_distance_m": 845.0,
   "midpoint_distance_m": 820.0,
   "start_elevation_m": 65.64663650340017,
   "end_elevation_m": 62.58939246298743,
   "start_xy": [
    231287.4035128181,
    325980.65203455434
   ],
   "end_xy": [
    231273.59221328207,
    325932.59739892854
   ]
  },
  "min_100m": {
   "gradient_pct": -3.789465370486795,
   "start_distance_m": 787.0,
   "end_distance_m": 887.0,
   "midpoint_distance_m": 837.0,
   "start_elevation_m": 65.84769825549773,
   "end_elevation_m": 62.05823288501094,
   "start_xy": [
    231289.61332074387,
    325988.3407762545
   ],
   "end_xy": [
    231260.51246449223,
    325892.7068919094
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 49.55341899116199,
   "start_distance_m": 467.0,
   "end_distance_m": 469.0,
   "midpoint_distance_m": 468.0,
   "start_elevation_m": 51.392814403083555,
   "end_elevation_m": 52.383882782906795,
   "start_xy": [
    231481.44365857623,
    326207.4693999109
   ],
   "end_xy": [
    231479.48842475022,
    326207.04861411557
   ]
  },
  "max_3m": {
   "gradient_pct": 43.30437550887586,
   "start_distance_m": 467.0,
   "end_distance_m": 470.0,
   "midpoint_distance_m": 468.5,
   "start_elevation_m": 51.392814403083555,
   "end_elevation_m": 52.69194566834983,
   "start_xy": [
    231481.44365857623,
    326207.4693999109
   ],
   "end_xy": [
    231478.51080783718,
    326206.8382212179
   ]
  }
 },
 "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": 0.121,
   "obstruction_max_height_m": 7.12,
   "flagged_windows_m": [
    50,
    100
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.007,
   "windows_resited": [
    2.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "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_29_231325_20220318dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_34_231326_20210302dtm.tif"
  ],
  "calculated_at": "2026-08-12T01:14:18+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_29_231325_20220318dtm.tif",
   "wg_del_34_231326_20210302dtm.tif"
  ],
  "elevation_capture_dates": [
   "02-03-2021",
   "18-03-2022"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.4% over 200 m (Terrain 50), gain 47.1 m over 724 m way. EXTENDED by graph walk: +2 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting."
 },
 "area": {
  "place": "Machroes",
  "county": "Gwynedd - Gwynedd"
 },
 "reported_claims": [],
 "confidence": "B",
 "shape": {
  "ascent_concentration": 0.468,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 89.0,
  "shape_class": "stepped"
 }
}