{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.1358, -4.4802)",
 "slug": "discovered-lane-52-1358-4-4802",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 42.925580724999435,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 69.0,
   "end_distance_m": 71.0,
   "start_elevation_m": 44.61105857786091,
   "end_elevation_m": 45.4695701923609,
   "min_gradient_pct": -67.7548059016658,
   "suppressed_max_gradient_pct": 64.8840510144808,
   "suppressed_location_m": [
    2037.0,
    2039.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.63076826554353,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 854.0,
   "end_distance_m": 857.0,
   "start_elevation_m": 100.46557663196913,
   "end_elevation_m": 101.47449967993543,
   "min_gradient_pct": -59.892035754705354,
   "suppressed_max_gradient_pct": 58.16379297619131,
   "suppressed_location_m": [
    263.0,
    266.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.103061626940246,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 880.0,
   "end_distance_m": 885.0,
   "start_elevation_m": 104.00016631290927,
   "end_elevation_m": 105.35531939425628,
   "min_gradient_pct": -48.81012354908847,
   "suppressed_max_gradient_pct": 46.11287363860214,
   "suppressed_location_m": [
    498.0,
    503.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.305349431508006,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 879.0,
   "end_distance_m": 889.0,
   "start_elevation_m": 103.76795530729748,
   "end_elevation_m": 105.99849025044828,
   "min_gradient_pct": -20.746726906807282,
   "suppressed_max_gradient_pct": 30.993330192347628,
   "suppressed_location_m": [
    551.0,
    561.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.740610237473902,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1085.0,
   "end_distance_m": 1105.0,
   "start_elevation_m": 105.7066603494215,
   "end_elevation_m": 109.85478239691628,
   "min_gradient_pct": -18.096142490846532,
   "suppressed_max_gradient_pct": 20.933194471852232,
   "suppressed_location_m": [
    812.0,
    832.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.74003886919013,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1083.0,
   "end_distance_m": 1108.0,
   "start_elevation_m": 105.30377884240835,
   "end_elevation_m": 110.48878855970588,
   "min_gradient_pct": -17.913293431126306
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.252660044199246,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1066.0,
   "end_distance_m": 1116.0,
   "start_elevation_m": 101.8011316637066,
   "end_elevation_m": 111.92746168580622,
   "min_gradient_pct": -15.44681582563993
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.586780696517536,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1051.0,
   "end_distance_m": 1151.0,
   "start_elevation_m": 99.9636315701648,
   "end_elevation_m": 116.55041226668233,
   "min_gradient_pct": -10.60923483768238,
   "suppressed_max_gradient_pct": 17.188356893580902,
   "suppressed_location_m": [
    1041.0,
    1141.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.314,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 120.0,
  "shape_class": "sustained"
 },
 "length_m": 2054.8092539594777,
 "start_elevation_m": 39.883926147605855,
 "end_elevation_m": 180.22697291796916,
 "endpoint_gain_m": 140.34304677036332,
 "overall_gradient_pct": 6.829979303428374,
 "accumulated_ascent_m": 175.6155279038715,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.103061626940246,
   "start_distance_m": 880.0,
   "end_distance_m": 885.0,
   "midpoint_distance_m": 882.5,
   "start_elevation_m": 104.00016631290927,
   "end_elevation_m": 105.35531939425628,
   "start_xy": [
    230060.30617051278,
    251696.0073905085
   ],
   "end_xy": [
    230056.13934908668,
    251693.24377034316
   ]
  },
  "max_10m": {
   "gradient_pct": 22.305349431508006,
   "start_distance_m": 879.0,
   "end_distance_m": 889.0,
   "midpoint_distance_m": 884.0,
   "start_elevation_m": 103.76795530729748,
   "end_elevation_m": 105.99849025044828,
   "start_xy": [
    230061.13986189017,
    251696.5596208194
   ],
   "end_xy": [
    230052.80543361668,
    251691.03356517412
   ]
  },
  "max_20m": {
   "gradient_pct": 20.740610237473902,
   "start_distance_m": 1085.0,
   "end_distance_m": 1105.0,
   "midpoint_distance_m": 1095.0,
   "start_elevation_m": 105.7066603494215,
   "end_elevation_m": 109.85478239691628,
   "start_xy": [
    230212.2745620908,
    251607.43702502563
   ],
   "end_xy": [
    230229.1346580029,
    251617.83261397583
   ]
  },
  "max_25m": {
   "gradient_pct": 20.74003886919013,
   "start_distance_m": 1083.0,
   "end_distance_m": 1108.0,
   "midpoint_distance_m": 1095.5,
   "start_elevation_m": 105.30377884240835,
   "end_elevation_m": 110.48878855970588,
   "start_xy": [
    230210.6617657239,
    251606.25427953913
   ],
   "end_xy": [
    230232.02839814822,
    251618.586830881
   ]
  },
  "max_50m": {
   "gradient_pct": 20.252660044199246,
   "start_distance_m": 1066.0,
   "end_distance_m": 1116.0,
   "midpoint_distance_m": 1091.0,
   "start_elevation_m": 101.8011316637066,
   "end_elevation_m": 111.92746168580622,
   "start_xy": [
    230195.3681981404,
    251599.52863976953
   ],
   "end_xy": [
    230239.51631768094,
    251615.90747859507
   ]
  },
  "max_100m": {
   "gradient_pct": 16.586780696517536,
   "start_distance_m": 1051.0,
   "end_distance_m": 1151.0,
   "midpoint_distance_m": 1101.0,
   "start_elevation_m": 99.9636315701648,
   "end_elevation_m": 116.55041226668233,
   "start_xy": [
    230182.03131182038,
    251605.8221859197
   ],
   "end_xy": [
    230261.19871236305,
    251589.0253248648
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -48.81012354908847,
   "start_distance_m": 545.0,
   "end_distance_m": 550.0,
   "midpoint_distance_m": 547.5,
   "start_elevation_m": 78.3747336028914,
   "end_elevation_m": 75.93422742543697,
   "start_xy": [
    230110.7580610335,
    251919.9170117193
   ],
   "end_xy": [
    230114.8256026851,
    251917.0092470356
   ]
  },
  "min_10m": {
   "gradient_pct": -20.746726906807282,
   "start_distance_m": 917.0,
   "end_distance_m": 927.0,
   "midpoint_distance_m": 922.0,
   "start_elevation_m": 103.99468861458475,
   "end_elevation_m": 101.92001592390402,
   "start_xy": [
    230067.0151114184,
    251672.34129012318
   ],
   "end_xy": [
    230075.65927393705,
    251667.31352454823
   ]
  },
  "min_20m": {
   "gradient_pct": -18.096142490846532,
   "start_distance_m": 917.0,
   "end_distance_m": 937.0,
   "midpoint_distance_m": 927.0,
   "start_elevation_m": 103.99468861458475,
   "end_elevation_m": 100.37546011641544,
   "start_xy": [
    230067.0151114184,
    251672.34129012318
   ],
   "end_xy": [
    230084.30329382422,
    251662.28551297038
   ]
  },
  "min_25m": {
   "gradient_pct": -17.913293431126306,
   "start_distance_m": 917.0,
   "end_distance_m": 942.0,
   "midpoint_distance_m": 929.5,
   "start_elevation_m": 103.99468861458475,
   "end_elevation_m": 99.51636525680317,
   "start_xy": [
    230067.0151114184,
    251672.34129012318
   ],
   "end_xy": [
    230088.62530358008,
    251659.77150729074
   ]
  },
  "min_50m": {
   "gradient_pct": -15.44681582563993,
   "start_distance_m": 903.0,
   "end_distance_m": 953.0,
   "midpoint_distance_m": 928.0,
   "start_elevation_m": 105.66497686095494,
   "end_elevation_m": 97.94156894813497,
   "start_xy": [
    230056.03200317212,
    251680.70185203612
   ],
   "end_xy": [
    230098.1338355653,
    251654.24088502454
   ]
  },
  "min_100m": {
   "gradient_pct": -10.60923483768238,
   "start_distance_m": 891.0,
   "end_distance_m": 991.0,
   "midpoint_distance_m": 941.0,
   "start_elevation_m": 106.30425835151453,
   "end_elevation_m": 95.69502351383215,
   "start_xy": [
    230051.13841610448,
    251689.92855354835
   ],
   "end_xy": [
    230132.98657587718,
    251640.37857032797
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 42.925580724999435,
   "start_distance_m": 69.0,
   "end_distance_m": 71.0,
   "midpoint_distance_m": 70.0,
   "start_elevation_m": 44.61105857786091,
   "end_elevation_m": 45.4695701923609,
   "start_xy": [
    229699.75111049798,
    251991.90434379844
   ],
   "end_xy": [
    229701.36873423946,
    251990.7583442161
   ]
  },
  "max_3m": {
   "gradient_pct": 33.63076826554353,
   "start_distance_m": 854.0,
   "end_distance_m": 857.0,
   "midpoint_distance_m": 855.5,
   "start_elevation_m": 100.46557663196913,
   "end_elevation_m": 101.47449967993543,
   "start_xy": [
    230080.65359934804,
    251712.0600356835
   ],
   "end_xy": [
    230078.45583730363,
    251710.01801667182
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.02,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.051,
   "windows_resited": [
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.072,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 3,
   "windows_masked": [
    {
     "window_m": 10.0,
     "start_m": 446.0,
     "end_m": 456.0,
     "raw_pct": 23.5,
     "reason": "hump"
    },
    {
     "window_m": 5.0,
     "start_m": 499.0,
     "end_m": 504.0,
     "raw_pct": 37.12,
     "reason": "hump+mask-edge+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 783.0,
     "end_m": 788.0,
     "raw_pct": 36.04,
     "reason": "hump"
    },
    {
     "window_m": 5.0,
     "start_m": 360.0,
     "end_m": 365.0,
     "raw_pct": 29.33,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.516,
   "obstruction_max_height_m": 24.47,
   "flagged_windows_m": [
    2,
    3,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    110.0,
    140.0
   ],
   [
    262.0,
    267.0
   ],
   [
    358.0,
    367.0
   ],
   [
    444.0,
    458.0
   ],
   [
    493.0,
    506.0
   ],
   [
    545.0,
    554.0
   ],
   [
    781.0,
    790.0
   ],
   [
    813.0,
    820.0
   ],
   [
    843.0,
    848.0
   ],
   [
    1020.0,
    1050.0
   ],
   [
    2036.0,
    2041.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "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_14_229250_20210321dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_14_229251_20210321dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_14_230250_20210321dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_14_230251_20210321dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_14_230252_20210321dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_30_229252_20220320dtm.tif"
  ],
  "calculated_at": "2026-09-12T01:42:52+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-uk-wales/batch-england-rchunk03.pbf",
  "osm_snapshot": "",
  "run_id": "texture-uk-wales-260912",
  "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_14_229250_20210321dtm.tif",
   "wg_del_14_229251_20210321dtm.tif",
   "wg_del_14_230250_20210321dtm.tif",
   "wg_del_14_230251_20210321dtm.tif",
   "wg_del_14_230252_20210321dtm.tif",
   "wg_del_30_229252_20220320dtm.tif"
  ],
  "elevation_capture_dates": [
   "20-03-2022",
   "21-03-2021"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Penbryn",
  "county": "Sir Ceredigion - Ceredigion"
 },
 "review_flags": [
  {
   "kind": "possible-bridge-or-hollow",
   "span_m": [
    927.0,
    1105.0
   ],
   "status": "pending-human-review",
   "noted": "2026-09-21",
   "figure_adjusted": false
  }
 ]
}