{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.9013, -3.5797)",
 "slug": "discovered-lane-52-9013-3-5797",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.18360861575485,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 895.0,
   "end_distance_m": 897.0,
   "start_elevation_m": 248.891706491032,
   "end_elevation_m": 249.6553786633471,
   "min_gradient_pct": -13.708913826482672
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.80705254799739,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 895.0,
   "end_distance_m": 898.0,
   "start_elevation_m": 248.891706491032,
   "end_elevation_m": 249.96591806747193,
   "min_gradient_pct": -8.810313677698408
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.834783398750687,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 894.0,
   "end_distance_m": 899.0,
   "start_elevation_m": 248.73093103767246,
   "end_elevation_m": 250.17267020761,
   "min_gradient_pct": -4.766250030487527
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.91224306956508,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 890.0,
   "end_distance_m": 900.0,
   "start_elevation_m": 248.01416678824893,
   "end_elevation_m": 250.30539109520544,
   "min_gradient_pct": -1.1804773076232777
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.940392610043347,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 796.0,
   "end_distance_m": 816.0,
   "start_elevation_m": 231.80310717000833,
   "end_elevation_m": 236.191185692017,
   "min_gradient_pct": 1.1532218827068164
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.914514180595233,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 791.0,
   "end_distance_m": 816.0,
   "start_elevation_m": 230.9625571468682,
   "end_elevation_m": 236.191185692017,
   "min_gradient_pct": 1.580748773267942
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.304206507267452,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 766.0,
   "end_distance_m": 816.0,
   "start_elevation_m": 226.53908243838328,
   "end_elevation_m": 236.191185692017,
   "min_gradient_pct": 3.0116373627587905
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.94933813127605,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 867.0,
   "end_distance_m": 967.0,
   "start_elevation_m": 243.6474810790971,
   "end_elevation_m": 261.59681921037316,
   "min_gradient_pct": 3.8708637147219918
  }
 ],
 "shape": {
  "ascent_concentration": 0.373,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 244.0,
  "shape_class": "sustained"
 },
 "length_m": 1427.725573473337,
 "start_elevation_m": 167.65248853180225,
 "end_elevation_m": 295.83213512219095,
 "endpoint_gain_m": 128.1796465903887,
 "overall_gradient_pct": 8.977891057772139,
 "accumulated_ascent_m": 129.15893656151786,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.834783398750687,
   "start_distance_m": 894.0,
   "end_distance_m": 899.0,
   "midpoint_distance_m": 896.5,
   "start_elevation_m": 248.73093103767246,
   "end_elevation_m": 250.17267020761,
   "start_xy": [
    293689.108716118,
    334837.91090151714
   ],
   "end_xy": [
    293684.8150614041,
    334835.34876779746
   ]
  },
  "max_10m": {
   "gradient_pct": 22.91224306956508,
   "start_distance_m": 890.0,
   "end_distance_m": 900.0,
   "midpoint_distance_m": 895.0,
   "start_elevation_m": 248.01416678824893,
   "end_elevation_m": 250.30539109520544,
   "start_xy": [
    293692.5436398891,
    334839.9606084929
   ],
   "end_xy": [
    293683.95633046125,
    334834.83634105354
   ]
  },
  "max_20m": {
   "gradient_pct": 21.940392610043347,
   "start_distance_m": 796.0,
   "end_distance_m": 816.0,
   "midpoint_distance_m": 806.0,
   "start_elevation_m": 231.80310717000833,
   "end_elevation_m": 236.191185692017,
   "start_xy": [
    293771.8216786268,
    334890.32090552675
   ],
   "end_xy": [
    293754.4807538926,
    334880.36464791355
   ]
  },
  "max_25m": {
   "gradient_pct": 20.914514180595233,
   "start_distance_m": 791.0,
   "end_distance_m": 816.0,
   "midpoint_distance_m": 803.5,
   "start_elevation_m": 230.9625571468682,
   "end_elevation_m": 236.191185692017,
   "start_xy": [
    293776.1691591814,
    334892.7906044613
   ],
   "end_xy": [
    293754.4807538926,
    334880.36464791355
   ]
  },
  "max_50m": {
   "gradient_pct": 19.304206507267452,
   "start_distance_m": 766.0,
   "end_distance_m": 816.0,
   "midpoint_distance_m": 791.0,
   "start_elevation_m": 226.53908243838328,
   "end_elevation_m": 236.191185692017,
   "start_xy": [
    293797.9065619544,
    334905.1390991341
   ],
   "end_xy": [
    293754.4807538926,
    334880.36464791355
   ]
  },
  "max_100m": {
   "gradient_pct": 17.94933813127605,
   "start_distance_m": 867.0,
   "end_distance_m": 967.0,
   "midpoint_distance_m": 917.0,
   "start_elevation_m": 243.6474810790971,
   "end_elevation_m": 261.59681921037316,
   "start_xy": [
    293712.2944515732,
    334851.7464236034
   ],
   "end_xy": [
    293661.8447901656,
    334783.76948137156
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.766250030487527,
   "start_distance_m": 1250.0,
   "end_distance_m": 1255.0,
   "midpoint_distance_m": 1252.5,
   "start_elevation_m": 280.9610967417517,
   "end_elevation_m": 280.7227842402273,
   "start_xy": [
    293833.2264148155,
    334560.3768999327
   ],
   "end_xy": [
    293836.6879996183,
    334556.76893227024
   ]
  },
  "min_10m": {
   "gradient_pct": -1.1804773076232777,
   "start_distance_m": 1249.0,
   "end_distance_m": 1259.0,
   "midpoint_distance_m": 1254.0,
   "start_elevation_m": 280.9217851320513,
   "end_elevation_m": 280.80373740128897,
   "start_xy": [
    293832.5340978549,
    334561.09849346516
   ],
   "end_xy": [
    293839.12038084806,
    334553.6190288666
   ]
  },
  "min_20m": {
   "gradient_pct": 1.1532218827068164,
   "start_distance_m": 1251.0,
   "end_distance_m": 1271.0,
   "midpoint_distance_m": 1261.0,
   "start_elevation_m": 280.9682695381789,
   "end_elevation_m": 281.19891391472026,
   "start_xy": [
    293833.91873177607,
    334559.6553064002
   ],
   "end_xy": [
    293845.52459345513,
    334543.4708240557
   ]
  },
  "min_25m": {
   "gradient_pct": 1.580748773267942,
   "start_distance_m": 1249.0,
   "end_distance_m": 1274.0,
   "midpoint_distance_m": 1261.5,
   "start_elevation_m": 280.9217851320513,
   "end_elevation_m": 281.3169723253683,
   "start_xy": [
    293832.5340978549,
    334561.09849346516
   ],
   "end_xy": [
    293847.1256466069,
    334540.933772853
   ]
  },
  "min_50m": {
   "gradient_pct": 3.0116373627587905,
   "start_distance_m": 512.0,
   "end_distance_m": 562.0,
   "midpoint_distance_m": 537.0,
   "start_elevation_m": 210.55937391310772,
   "end_elevation_m": 212.06519259448712,
   "start_xy": [
    293668.1612383241,
    335020.1309172236
   ],
   "end_xy": [
    293717.65460462065,
    335013.5612156512
   ]
  },
  "min_100m": {
   "gradient_pct": 3.8708637147219918,
   "start_distance_m": 509.0,
   "end_distance_m": 609.0,
   "midpoint_distance_m": 559.0,
   "start_elevation_m": 210.41982101628628,
   "end_elevation_m": 214.29068473100827,
   "start_xy": [
    293665.18120778125,
    335020.4764862671
   ],
   "end_xy": [
    293760.2576096918,
    334994.0221852538
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.18360861575485,
   "start_distance_m": 895.0,
   "end_distance_m": 897.0,
   "midpoint_distance_m": 896.0,
   "start_elevation_m": 248.891706491032,
   "end_elevation_m": 249.6553786633471,
   "start_xy": [
    293688.2499851752,
    334837.3984747732
   ],
   "end_xy": [
    293686.5325232896,
    334836.3736212853
   ]
  },
  "max_3m": {
   "gradient_pct": 35.80705254799739,
   "start_distance_m": 895.0,
   "end_distance_m": 898.0,
   "midpoint_distance_m": 896.5,
   "start_elevation_m": 248.891706491032,
   "end_elevation_m": 249.96591806747193,
   "start_xy": [
    293688.2499851752,
    334837.3984747732
   ],
   "end_xy": [
    293685.67379234685,
    334835.8611945414
   ]
  }
 },
 "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": 0.063,
   "obstruction_max_height_m": 21.25,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    100
   ]
  },
  "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_27_293334_20220301dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_27_293335_20220301dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:05:12+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",
  "run_id": "hunt-wales-260905",
  "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_27_293334_20220301dtm.tif",
   "wg_del_27_293335_20220301dtm.tif"
  ],
  "elevation_capture_dates": [
   "01-03-2022"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Y Bala",
  "county": "Gwynedd - Gwynedd"
 }
}