{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.0331, -4.8065)",
 "slug": "discovered-lane-52-0331-4-8065",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 55.304215669954004,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 654.0,
   "end_distance_m": 656.0,
   "start_elevation_m": 84.65084292497765,
   "end_elevation_m": 85.75692723837673,
   "min_gradient_pct": -50.48169678871659,
   "suppressed_max_gradient_pct": 56.83954016335662,
   "suppressed_location_m": [
    524.0,
    526.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 42.787893998721906,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 653.0,
   "end_distance_m": 656.0,
   "start_elevation_m": 84.47329041841508,
   "end_elevation_m": 85.75692723837673,
   "min_gradient_pct": -38.210812329730004,
   "suppressed_max_gradient_pct": 49.7559483745898,
   "suppressed_location_m": [
    524.0,
    527.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 36.81920123793063,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 272.0,
   "end_distance_m": 277.0,
   "start_elevation_m": 44.593559074970514,
   "end_elevation_m": 46.434519136867046,
   "min_gradient_pct": -22.8011607334264
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.3127840924392,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 272.0,
   "end_distance_m": 282.0,
   "start_elevation_m": 44.593559074970514,
   "end_elevation_m": 47.324837484214434,
   "min_gradient_pct": -17.43827194507169
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.27401445963993,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 272.0,
   "end_distance_m": 292.0,
   "start_elevation_m": 44.593559074970514,
   "end_elevation_m": 49.2483619668985,
   "min_gradient_pct": -15.815442607519083
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.38457473222647,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 272.0,
   "end_distance_m": 297.0,
   "start_elevation_m": 44.593559074970514,
   "end_elevation_m": 49.93970275802713,
   "min_gradient_pct": -15.386546608025355
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.58001246766679,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 272.0,
   "end_distance_m": 322.0,
   "start_elevation_m": 44.593559074970514,
   "end_elevation_m": 53.88356530880391,
   "min_gradient_pct": -14.516498715876097
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.83384277515681,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 263.0,
   "end_distance_m": 363.0,
   "start_elevation_m": 44.06478552909416,
   "end_elevation_m": 58.89862830425097,
   "min_gradient_pct": -14.123826178698174
  }
 ],
 "shape": {
  "ascent_concentration": 0.645,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 73.0,
  "shape_class": "stepped"
 },
 "length_m": 1484.2099016273603,
 "start_elevation_m": 68.66648839419591,
 "end_elevation_m": 89.76972978320319,
 "endpoint_gain_m": 21.10324138900728,
 "overall_gradient_pct": 1.4218501955733251,
 "accumulated_ascent_m": 76.65624283114238,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 36.81920123793063,
   "start_distance_m": 272.0,
   "end_distance_m": 277.0,
   "midpoint_distance_m": 274.5,
   "start_elevation_m": 44.593559074970514,
   "end_elevation_m": 46.434519136867046,
   "start_xy": [
    207577.3867470865,
    240923.21483289762
   ],
   "end_xy": [
    207581.46145778798,
    240920.31712126613
   ]
  },
  "max_10m": {
   "gradient_pct": 27.3127840924392,
   "start_distance_m": 272.0,
   "end_distance_m": 282.0,
   "midpoint_distance_m": 277.0,
   "start_elevation_m": 44.593559074970514,
   "end_elevation_m": 47.324837484214434,
   "start_xy": [
    207577.3867470865,
    240923.21483289762
   ],
   "end_xy": [
    207585.5361684895,
    240917.41940963463
   ]
  },
  "max_20m": {
   "gradient_pct": 23.27401445963993,
   "start_distance_m": 272.0,
   "end_distance_m": 292.0,
   "midpoint_distance_m": 282.0,
   "start_elevation_m": 44.593559074970514,
   "end_elevation_m": 49.2483619668985,
   "start_xy": [
    207577.3867470865,
    240923.21483289762
   ],
   "end_xy": [
    207595.11080491723,
    240915.739236241
   ]
  },
  "max_25m": {
   "gradient_pct": 21.38457473222647,
   "start_distance_m": 272.0,
   "end_distance_m": 297.0,
   "midpoint_distance_m": 284.5,
   "start_elevation_m": 44.593559074970514,
   "end_elevation_m": 49.93970275802713,
   "start_xy": [
    207577.3867470865,
    240923.21483289762
   ],
   "end_xy": [
    207600.10489443105,
    240915.49619318347
   ]
  },
  "max_50m": {
   "gradient_pct": 18.58001246766679,
   "start_distance_m": 272.0,
   "end_distance_m": 322.0,
   "midpoint_distance_m": 297.0,
   "start_elevation_m": 44.593559074970514,
   "end_elevation_m": 53.88356530880391,
   "start_xy": [
    207577.3867470865,
    240923.21483289762
   ],
   "end_xy": [
    207625.07534200023,
    240914.28097789572
   ]
  },
  "max_100m": {
   "gradient_pct": 14.83384277515681,
   "start_distance_m": 263.0,
   "end_distance_m": 363.0,
   "midpoint_distance_m": 313.0,
   "start_elevation_m": 44.06478552909416,
   "end_elevation_m": 58.89862830425097,
   "start_xy": [
    207571.41519594996,
    240929.47936067462
   ],
   "end_xy": [
    207665.72980535898,
    240909.5035990264
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -22.8011607334264,
   "start_distance_m": 527.0,
   "end_distance_m": 532.0,
   "midpoint_distance_m": 529.5,
   "start_elevation_m": 77.94300811228555,
   "end_elevation_m": 76.80295007561423,
   "start_xy": [
    207824.07050075053,
    240868.53442424175
   ],
   "end_xy": [
    207827.88748354398,
    240865.4277273568
   ]
  },
  "min_10m": {
   "gradient_pct": -17.43827194507169,
   "start_distance_m": 74.0,
   "end_distance_m": 84.0,
   "midpoint_distance_m": 79.0,
   "start_elevation_m": 60.958622740470105,
   "end_elevation_m": 59.214795545962936,
   "start_xy": [
    207437.80793003185,
    241055.53123910504
   ],
   "end_xy": [
    207447.2594508563,
    241052.41868156975
   ]
  },
  "min_20m": {
   "gradient_pct": -15.815442607519083,
   "start_distance_m": 74.0,
   "end_distance_m": 94.0,
   "midpoint_distance_m": 84.0,
   "start_elevation_m": 60.958622740470105,
   "end_elevation_m": 57.79553421896629,
   "start_xy": [
    207437.80793003185,
    241055.53123910504
   ],
   "end_xy": [
    207456.65665649145,
    241048.99924795429
   ]
  },
  "min_25m": {
   "gradient_pct": -15.386546608025355,
   "start_distance_m": 74.0,
   "end_distance_m": 99.0,
   "midpoint_distance_m": 86.5,
   "start_elevation_m": 60.958622740470105,
   "end_elevation_m": 57.111986088463766,
   "start_xy": [
    207437.80793003185,
    241055.53123910504
   ],
   "end_xy": [
    207461.34494415493,
    241047.27285585686
   ]
  },
  "min_50m": {
   "gradient_pct": -14.516498715876097,
   "start_distance_m": 136.0,
   "end_distance_m": 186.0,
   "midpoint_distance_m": 161.0,
   "start_elevation_m": 52.41269196805756,
   "end_elevation_m": 45.15444261011951,
   "start_xy": [
    207488.19017096,
    241021.81045617058
   ],
   "end_xy": [
    207524.489056731,
    240987.42609404202
   ]
  },
  "min_100m": {
   "gradient_pct": -14.123826178698174,
   "start_distance_m": 75.0,
   "end_distance_m": 175.0,
   "midpoint_distance_m": 125.0,
   "start_elevation_m": 60.814290728220065,
   "end_elevation_m": 46.69046454952189,
   "start_xy": [
    207438.80196578466,
    241055.49617182367
   ],
   "end_xy": [
    207516.4864911059,
    240994.9717105553
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 55.304215669954004,
   "start_distance_m": 654.0,
   "end_distance_m": 656.0,
   "midpoint_distance_m": 655.0,
   "start_elevation_m": 84.65084292497765,
   "end_elevation_m": 85.75692723837673,
   "start_xy": [
    207915.3054489533,
    240780.34258341457
   ],
   "end_xy": [
    207916.6755515789,
    240778.88559377997
   ]
  },
  "max_3m": {
   "gradient_pct": 42.787893998721906,
   "start_distance_m": 653.0,
   "end_distance_m": 656.0,
   "midpoint_distance_m": 654.5,
   "start_elevation_m": 84.47329041841508,
   "end_elevation_m": 85.75692723837673,
   "start_xy": [
    207914.62039764048,
    240781.07107823188
   ],
   "end_xy": [
    207916.6755515789,
    240778.88559377997
   ]
  }
 },
 "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": 0.026,
   "windows_resited": [
    2.0,
    3.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.36,
   "obstruction_max_height_m": 22.23,
   "flagged_windows_m": [
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    368.0,
    373.0
   ],
   [
    514.0,
    519.0
   ],
   [
    523.0,
    531.0
   ],
   [
    596.0,
    601.0
   ],
   [
    615.0,
    620.0
   ],
   [
    634.0,
    639.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "extent": [
   "descends_at_start"
  ]
 },
 "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_2_207240_20201205dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_2_207241_20201205dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_6_208240_20201205dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_6_208241_20201205dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:12:25+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_2_207240_20201205dtm.tif",
   "wg_del_2_207241_20201205dtm.tif",
   "wg_del_6_208240_20201205dtm.tif",
   "wg_del_6_208241_20201205dtm.tif"
  ],
  "elevation_capture_dates": [
   "06-12-2020",
   "10-02-2021"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cwm Cenau",
  "county": "Sir Benfro - Pembrokeshire"
 }
}