{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.1707, -3.9768)",
 "slug": "discovered-lane-52-1707-3-9768",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 46.34775092935115,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 280.0,
   "end_distance_m": 282.0,
   "start_elevation_m": 174.9994182801723,
   "end_elevation_m": 175.92637329875933,
   "min_gradient_pct": -18.845678986460257
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 39.26702179154612,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 265.0,
   "end_distance_m": 268.0,
   "start_elevation_m": 171.51473085074068,
   "end_elevation_m": 172.69274150448706,
   "min_gradient_pct": -13.573560306655471
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.094899009588175,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 263.0,
   "end_distance_m": 268.0,
   "start_elevation_m": 170.98799655400765,
   "end_elevation_m": 172.69274150448706,
   "min_gradient_pct": -10.253448046258882
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.50056804301653,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 261.0,
   "end_distance_m": 271.0,
   "start_elevation_m": 170.53899435429008,
   "end_elevation_m": 173.48905115859174,
   "min_gradient_pct": -7.343352885312129
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.863888679315323,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 262.0,
   "end_distance_m": 282.0,
   "start_elevation_m": 170.75359556289627,
   "end_elevation_m": 175.92637329875933,
   "min_gradient_pct": -1.7038191428824234
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.016028897751312,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 257.0,
   "end_distance_m": 282.0,
   "start_elevation_m": 170.1723660743215,
   "end_elevation_m": 175.92637329875933,
   "min_gradient_pct": 0.8509101467792561
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.705669865419395,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 252.0,
   "end_distance_m": 302.0,
   "start_elevation_m": 169.09157120024418,
   "end_elevation_m": 179.44440613295387,
   "min_gradient_pct": 1.91373658382156
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.38884781421055,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 214.0,
   "end_distance_m": 314.0,
   "start_elevation_m": 163.46271485618857,
   "end_elevation_m": 180.85156267039912,
   "min_gradient_pct": 4.011752804461764
  }
 ],
 "shape": {
  "ascent_concentration": 0.448,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 84.0,
  "shape_class": "sustained"
 },
 "length_m": 374.9999999999941,
 "start_elevation_m": 151.26592495947114,
 "end_elevation_m": 185.58700940862772,
 "endpoint_gain_m": 34.32108444915659,
 "overall_gradient_pct": 9.152289186441902,
 "accumulated_ascent_m": 38.29360279005272,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.094899009588175,
   "start_distance_m": 263.0,
   "end_distance_m": 268.0,
   "midpoint_distance_m": 265.5,
   "start_elevation_m": 170.98799655400765,
   "end_elevation_m": 172.69274150448706,
   "start_xy": [
    265130.10122995323,
    254247.22052982965
   ],
   "end_xy": [
    265135.00423249457,
    254246.24044509887
   ]
  },
  "max_10m": {
   "gradient_pct": 29.50056804301653,
   "start_distance_m": 261.0,
   "end_distance_m": 271.0,
   "midpoint_distance_m": 266.0,
   "start_elevation_m": 170.53899435429008,
   "end_elevation_m": 173.48905115859174,
   "start_xy": [
    265128.1400289367,
    254247.61256372195
   ],
   "end_xy": [
    265137.9460340194,
    254245.65239426043
   ]
  },
  "max_20m": {
   "gradient_pct": 25.863888679315323,
   "start_distance_m": 262.0,
   "end_distance_m": 282.0,
   "midpoint_distance_m": 272.0,
   "start_elevation_m": 170.75359556289627,
   "end_elevation_m": 175.92637329875933,
   "start_xy": [
    265129.12062944495,
    254247.41654677578
   ],
   "end_xy": [
    265148.73263961036,
    254243.49620785276
   ]
  },
  "max_25m": {
   "gradient_pct": 23.016028897751312,
   "start_distance_m": 257.0,
   "end_distance_m": 282.0,
   "midpoint_distance_m": 269.5,
   "start_elevation_m": 170.1723660743215,
   "end_elevation_m": 175.92637329875933,
   "start_xy": [
    265124.2176269036,
    254248.39663150656
   ],
   "end_xy": [
    265148.73263961036,
    254243.49620785276
   ]
  },
  "max_50m": {
   "gradient_pct": 20.705669865419395,
   "start_distance_m": 252.0,
   "end_distance_m": 302.0,
   "midpoint_distance_m": 277.0,
   "start_elevation_m": 169.09157120024418,
   "end_elevation_m": 179.44440613295387,
   "start_xy": [
    265119.3146243622,
    254249.3767162373
   ],
   "end_xy": [
    265166.7376112173,
    254248.1179460007
   ]
  },
  "max_100m": {
   "gradient_pct": 17.38884781421055,
   "start_distance_m": 214.0,
   "end_distance_m": 314.0,
   "midpoint_distance_m": 264.0,
   "start_elevation_m": 163.46271485618857,
   "end_elevation_m": 180.85156267039912,
   "start_xy": [
    265085.6740641495,
    254266.24368298022
   ],
   "end_xy": [
    265176.8455267093,
    254254.58556104853
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.253448046258882,
   "start_distance_m": 92.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 94.5,
   "start_elevation_m": 156.599777920148,
   "end_elevation_m": 156.08710551783506,
   "start_xy": [
    265000.7668388252,
    254330.3257493592
   ],
   "end_xy": [
    265005.4372630212,
    254332.1110050354
   ]
  },
  "min_10m": {
   "gradient_pct": -7.343352885312129,
   "start_distance_m": 141.0,
   "end_distance_m": 151.0,
   "midpoint_distance_m": 146.0,
   "start_elevation_m": 159.37314885016804,
   "end_elevation_m": 158.63881356163682,
   "start_xy": [
    265042.62756181945,
    254321.55140295433
   ],
   "end_xy": [
    265050.038413716,
    254314.83729287426
   ]
  },
  "min_20m": {
   "gradient_pct": -1.7038191428824234,
   "start_distance_m": 138.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 148.0,
   "start_elevation_m": 159.25102787722977,
   "end_elevation_m": 158.9102640486533,
   "start_xy": [
    265040.40430625045,
    254323.56563597833
   ],
   "end_xy": [
    265055.2260100436,
    254310.13741581823
   ]
  },
  "min_25m": {
   "gradient_pct": 0.8509101467792561,
   "start_distance_m": 134.0,
   "end_distance_m": 159.0,
   "midpoint_distance_m": 146.5,
   "start_elevation_m": 158.76506471745867,
   "end_elevation_m": 158.97779225415348,
   "start_xy": [
    265037.4399654918,
    254326.25128001036
   ],
   "end_xy": [
    265055.96709523327,
    254309.46600481024
   ]
  },
  "min_50m": {
   "gradient_pct": 1.91373658382156,
   "start_distance_m": 78.0,
   "end_distance_m": 128.0,
   "midpoint_distance_m": 103.0,
   "start_elevation_m": 156.28453920264434,
   "end_elevation_m": 157.24140749455512,
   "start_xy": [
    264987.37599367875,
    254326.5014295384
   ],
   "end_xy": [
    265032.9934543539,
    254330.2797460584
   ]
  },
  "min_100m": {
   "gradient_pct": 4.011752804461764,
   "start_distance_m": 78.0,
   "end_distance_m": 178.0,
   "midpoint_distance_m": 128.0,
   "start_elevation_m": 156.28453920264434,
   "end_elevation_m": 160.2962920071061,
   "start_xy": [
    264987.37599367875,
    254326.5014295384
   ],
   "end_xy": [
    265070.0477138368,
    254296.70919565813
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 46.34775092935115,
   "start_distance_m": 280.0,
   "end_distance_m": 282.0,
   "midpoint_distance_m": 281.0,
   "start_elevation_m": 174.9994182801723,
   "end_elevation_m": 175.92637329875933,
   "start_xy": [
    265146.7714385938,
    254243.88824174507
   ],
   "end_xy": [
    265148.73263961036,
    254243.49620785276
   ]
  },
  "max_3m": {
   "gradient_pct": 39.26702179154612,
   "start_distance_m": 265.0,
   "end_distance_m": 268.0,
   "midpoint_distance_m": 266.5,
   "start_elevation_m": 171.51473085074068,
   "end_elevation_m": 172.69274150448706,
   "start_xy": [
    265132.06243096973,
    254246.82849593734
   ],
   "end_xy": [
    265135.00423249457,
    254246.24044509887
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.082,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.678,
   "obstruction_max_height_m": 19.77,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    20.0,
    50.0
   ]
  ],
  "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_23_264254_20220117dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_23_265254_20220117dtm.tif"
  ],
  "calculated_at": "2026-09-05T06:00:18+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",
  "run_id": "summit-260905-summit-wales-wales-2026-08-11",
  "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_23_264254_20220117dtm.tif",
   "wg_del_23_265254_20220117dtm.tif"
  ],
  "elevation_capture_dates": [
   "17-01-2022"
  ],
  "route_summit_trim_m": 121.2,
  "route_summit_trim_loss_m": 9.0,
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Llanddewi Brefi",
  "county": "Sir Ceredigion - Ceredigion"
 }
}