{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.4515, -3.5928)",
 "slug": "discovered-lane-52-4515-3-5928",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.809511830126723,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 55.0,
   "end_distance_m": 57.0,
   "start_elevation_m": 212.6313530062278,
   "end_elevation_m": 213.24754324283035,
   "min_gradient_pct": -4.9295327060150385
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.669088517102484,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 126.0,
   "end_distance_m": 129.0,
   "start_elevation_m": 221.01431353678305,
   "end_elevation_m": 221.75438619229612,
   "min_gradient_pct": -0.8824978942243433
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.417288480772527,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 217.0,
   "end_distance_m": 222.0,
   "start_elevation_m": 235.40452646172105,
   "end_elevation_m": 236.57539088575967,
   "min_gradient_pct": 1.47033742259282
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.09908767304455,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 212.0,
   "end_distance_m": 222.0,
   "start_elevation_m": 234.36548211845522,
   "end_elevation_m": 236.57539088575967,
   "min_gradient_pct": 4.010521989554832
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.339678161289726,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 202.0,
   "end_distance_m": 222.0,
   "start_elevation_m": 232.30745525350173,
   "end_elevation_m": 236.57539088575967,
   "min_gradient_pct": 5.801669603333437
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.06637486398199,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 203.0,
   "end_distance_m": 228.0,
   "start_elevation_m": 232.48830834769979,
   "end_elevation_m": 237.75490206369528,
   "min_gradient_pct": 6.214600446788154
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.57152054557116,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 183.0,
   "end_distance_m": 233.0,
   "start_elevation_m": 228.8886749536022,
   "end_elevation_m": 238.67443522638777,
   "min_gradient_pct": 9.68789822023092
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.03254404605343,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 199.0,
   "end_distance_m": 299.0,
   "start_elevation_m": 231.71318817913746,
   "end_elevation_m": 249.7457322251909,
   "min_gradient_pct": 11.33538891662647
  }
 ],
 "shape": {
  "ascent_concentration": 0.332,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 173.0,
  "shape_class": "sustained"
 },
 "length_m": 362.1792436130982,
 "start_elevation_m": 207.30554237744172,
 "end_elevation_m": 256.88000685302234,
 "endpoint_gain_m": 49.57446447558061,
 "overall_gradient_pct": 13.687825945249102,
 "accumulated_ascent_m": 49.95831487225274,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.417288480772527,
   "start_distance_m": 217.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 219.5,
   "start_elevation_m": 235.40452646172105,
   "end_elevation_m": 236.57539088575967,
   "start_xy": [
    291721.6133063556,
    285039.53321251925
   ],
   "end_xy": [
    291717.13895963476,
    285041.722324062
   ]
  },
  "max_10m": {
   "gradient_pct": 22.09908767304455,
   "start_distance_m": 212.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 217.0,
   "start_elevation_m": 234.36548211845522,
   "end_elevation_m": 236.57539088575967,
   "start_xy": [
    291725.89901713986,
    285036.9578129243
   ],
   "end_xy": [
    291717.13895963476,
    285041.722324062
   ]
  },
  "max_20m": {
   "gradient_pct": 21.339678161289726,
   "start_distance_m": 202.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 212.0,
   "start_elevation_m": 232.30745525350173,
   "end_elevation_m": 236.57539088575967,
   "start_xy": [
    291734.47043870843,
    285031.8070137344
   ],
   "end_xy": [
    291717.13895963476,
    285041.722324062
   ]
  },
  "max_25m": {
   "gradient_pct": 21.06637486398199,
   "start_distance_m": 203.0,
   "end_distance_m": 228.0,
   "midpoint_distance_m": 215.5,
   "start_elevation_m": 232.48830834769979,
   "end_elevation_m": 237.75490206369528,
   "start_xy": [
    291733.6132965516,
    285032.32209365343
   ],
   "end_xy": [
    291711.5394484096,
    285043.8776602397
   ]
  },
  "max_50m": {
   "gradient_pct": 19.57152054557116,
   "start_distance_m": 183.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 208.0,
   "start_elevation_m": 228.8886749536022,
   "end_elevation_m": 238.67443522638777,
   "start_xy": [
    291750.407291808,
    285021.49462849967
   ],
   "end_xy": [
    291706.87318905524,
    285045.6737737211
   ]
  },
  "max_100m": {
   "gradient_pct": 18.03254404605343,
   "start_distance_m": 199.0,
   "end_distance_m": 299.0,
   "midpoint_distance_m": 249.0,
   "start_elevation_m": 231.71318817913746,
   "end_elevation_m": 249.7457322251909,
   "start_xy": [
    291737.04186517897,
    285030.2617739775
   ],
   "end_xy": [
    291645.7309303876,
    285070.4435127179
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.47033742259282,
   "start_distance_m": 338.0,
   "end_distance_m": 343.0,
   "midpoint_distance_m": 340.5,
   "start_elevation_m": 253.9976744676057,
   "end_elevation_m": 254.07119133873533,
   "start_xy": [
    291607.7448499008,
    285065.71861889056
   ],
   "end_xy": [
    291603.24719951866,
    285063.5441669999
   ]
  },
  "min_10m": {
   "gradient_pct": 4.010521989554832,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 207.30554237744172,
   "end_elevation_m": 207.7065945763972,
   "start_xy": [
    291888.731,
    284943.257
   ],
   "end_xy": [
    291882.6736294029,
    284935.35477489687
   ]
  },
  "min_20m": {
   "gradient_pct": 5.801669603333437,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 207.30554237744172,
   "end_elevation_m": 208.4658762981084,
   "start_xy": [
    291888.731,
    284943.257
   ],
   "end_xy": [
    291875.22543678165,
    284928.8929897492
   ]
  },
  "min_25m": {
   "gradient_pct": 6.214600446788154,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 207.30554237744172,
   "end_elevation_m": 208.85919248913876,
   "start_xy": [
    291888.731,
    284943.257
   ],
   "end_xy": [
    291870.8627238038,
    284926.450299537
   ]
  },
  "min_50m": {
   "gradient_pct": 9.68789822023092,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 207.30554237744172,
   "end_elevation_m": 212.14949148755719,
   "start_xy": [
    291888.731,
    284943.257
   ],
   "end_xy": [
    291850.2633381037,
    284934.44446845434
   ]
  },
  "min_100m": {
   "gradient_pct": 11.33538891662647,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 207.30554237744172,
   "end_elevation_m": 218.6409312940682,
   "start_xy": [
    291888.731,
    284943.257
   ],
   "end_xy": [
    291815.73772481916,
    284970.6105026207
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.809511830126723,
   "start_distance_m": 55.0,
   "end_distance_m": 57.0,
   "midpoint_distance_m": 56.0,
   "start_elevation_m": 212.6313530062278,
   "end_elevation_m": 213.24754324283035,
   "start_xy": [
    291846.8107767753,
    284938.06107187096
   ],
   "end_xy": [
    291845.4297522439,
    284939.50771323766
   ]
  },
  "max_3m": {
   "gradient_pct": 24.669088517102484,
   "start_distance_m": 126.0,
   "end_distance_m": 129.0,
   "midpoint_distance_m": 127.5,
   "start_elevation_m": 221.01431353678305,
   "end_elevation_m": 221.75438619229612,
   "start_xy": [
    291796.45335992315,
    284987.8976106092
   ],
   "end_xy": [
    291794.02988265397,
    284989.6658747087
   ]
  }
 },
 "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": 0.201,
   "obstruction_max_height_m": 16.15,
   "flagged_windows_m": [
    3,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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_28_291284_20220314dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_28_291285_20220314dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:05:21+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_28_291284_20220314dtm.tif",
   "wg_del_28_291285_20220314dtm.tif"
  ],
  "elevation_capture_dates": [
   "14-03-2022"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cwm Heulog",
  "county": "Powys - Powys"
 }
}