{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.5066, -3.6009)",
 "slug": "discovered-lane-52-5066-3-6009",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.705983791878452,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 692.0,
   "end_distance_m": 694.0,
   "start_elevation_m": 294.03907869982413,
   "end_elevation_m": 294.5931983756617,
   "min_gradient_pct": -11.550578191929617
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.500556333346974,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 687.0,
   "end_distance_m": 690.0,
   "start_elevation_m": 292.88927641755254,
   "end_elevation_m": 293.68429310755295,
   "min_gradient_pct": -10.322394496732082
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.001775729690507,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 684.0,
   "end_distance_m": 689.0,
   "start_elevation_m": 292.1864807115652,
   "end_elevation_m": 293.4365694980497,
   "min_gradient_pct": -10.454978744400023
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.775765687913918,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 680.0,
   "end_distance_m": 690.0,
   "start_elevation_m": 291.20671653876155,
   "end_elevation_m": 293.68429310755295,
   "min_gradient_pct": -9.743869734170403
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.03179098922351,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 670.0,
   "end_distance_m": 690.0,
   "start_elevation_m": 288.87793490970824,
   "end_elevation_m": 293.68429310755295,
   "min_gradient_pct": -8.910158584245664
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.890983638551916,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 676.0,
   "end_distance_m": 701.0,
   "start_elevation_m": 290.234494396224,
   "end_elevation_m": 296.207240305862,
   "min_gradient_pct": -8.847278855676905
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.856636244770016,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 668.0,
   "end_distance_m": 718.0,
   "start_elevation_m": 288.41611322751794,
   "end_elevation_m": 299.84443134990295,
   "min_gradient_pct": -7.771983536111634
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.07032093139941,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 643.0,
   "end_distance_m": 743.0,
   "start_elevation_m": 283.41913934053,
   "end_elevation_m": 304.48946027192943,
   "min_gradient_pct": -7.040116760375383
  }
 ],
 "shape": {
  "ascent_concentration": 0.513,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 239.0,
  "shape_class": "stepped"
 },
 "length_m": 2761.3245344279094,
 "start_elevation_m": 201.2655966675517,
 "end_elevation_m": 378.34794621899476,
 "endpoint_gain_m": 177.08234955144306,
 "overall_gradient_pct": 6.4129495589380605,
 "accumulated_ascent_m": 194.99286322866402,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.001775729690507,
   "start_distance_m": 684.0,
   "end_distance_m": 689.0,
   "midpoint_distance_m": 686.5,
   "start_elevation_m": 292.1864807115652,
   "end_elevation_m": 293.4365694980497,
   "start_xy": [
    292052.285505566,
    291021.9017496717
   ],
   "end_xy": [
    292047.3475626083,
    291021.11643486423
   ]
  },
  "max_10m": {
   "gradient_pct": 24.775765687913918,
   "start_distance_m": 680.0,
   "end_distance_m": 690.0,
   "midpoint_distance_m": 685.0,
   "start_elevation_m": 291.20671653876155,
   "end_elevation_m": 293.68429310755295,
   "start_xy": [
    292056.2358599321,
    291022.5300015177
   ],
   "end_xy": [
    292046.3599740168,
    291020.95937190275
   ]
  },
  "max_20m": {
   "gradient_pct": 24.03179098922351,
   "start_distance_m": 670.0,
   "end_distance_m": 690.0,
   "midpoint_distance_m": 680.0,
   "start_elevation_m": 288.87793490970824,
   "end_elevation_m": 293.68429310755295,
   "start_xy": [
    292065.9207148315,
    291020.4836936155
   ],
   "end_xy": [
    292046.3599740168,
    291020.95937190275
   ]
  },
  "max_25m": {
   "gradient_pct": 23.890983638551916,
   "start_distance_m": 676.0,
   "end_distance_m": 701.0,
   "midpoint_distance_m": 688.5,
   "start_elevation_m": 290.234494396224,
   "end_elevation_m": 296.207240305862,
   "start_xy": [
    292060.19497881253,
    291022.09996064706
   ],
   "end_xy": [
    292035.7330052617,
    291018.1230816117
   ]
  },
  "max_50m": {
   "gradient_pct": 22.856636244770016,
   "start_distance_m": 668.0,
   "end_distance_m": 718.0,
   "midpoint_distance_m": 693.0,
   "start_elevation_m": 288.41611322751794,
   "end_elevation_m": 299.84443134990295,
   "start_xy": [
    292067.7620678233,
    291019.7030405815
   ],
   "end_xy": [
    292019.30054078845,
    291013.7696687879
   ]
  },
  "max_100m": {
   "gradient_pct": 21.07032093139941,
   "start_distance_m": 643.0,
   "end_distance_m": 743.0,
   "midpoint_distance_m": 693.0,
   "start_elevation_m": 283.41913934053,
   "end_elevation_m": 304.48946027192943,
   "start_xy": [
    292090.59677807667,
    291009.5406673116
   ],
   "end_xy": [
    291995.00764838525,
    291007.8658357014
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.454978744400023,
   "start_distance_m": 2393.0,
   "end_distance_m": 2398.0,
   "midpoint_distance_m": 2395.5,
   "start_elevation_m": 369.59940355264825,
   "end_elevation_m": 369.07665461542825,
   "start_xy": [
    290437.33251198917,
    291248.3616775888
   ],
   "end_xy": [
    290432.3948703648,
    291249.1488847975
   ]
  },
  "min_10m": {
   "gradient_pct": -9.743869734170403,
   "start_distance_m": 2388.0,
   "end_distance_m": 2398.0,
   "midpoint_distance_m": 2393.0,
   "start_elevation_m": 370.0510415888453,
   "end_elevation_m": 369.07665461542825,
   "start_xy": [
    290442.2701536135,
    291247.57447038003
   ],
   "end_xy": [
    290432.3948703648,
    291249.1488847975
   ]
  },
  "min_20m": {
   "gradient_pct": -8.910158584245664,
   "start_distance_m": 2386.0,
   "end_distance_m": 2406.0,
   "midpoint_distance_m": 2396.0,
   "start_elevation_m": 370.20584231556364,
   "end_elevation_m": 368.4238105987145,
   "start_xy": [
    290444.24521026324,
    291247.2595874965
   ],
   "end_xy": [
    290424.5919406931,
    291250.8614102234
   ]
  },
  "min_25m": {
   "gradient_pct": -8.847278855676905,
   "start_distance_m": 2381.0,
   "end_distance_m": 2406.0,
   "midpoint_distance_m": 2393.5,
   "start_elevation_m": 370.63563031263374,
   "end_elevation_m": 368.4238105987145,
   "start_xy": [
    290449.1828518876,
    291246.47238028777
   ],
   "end_xy": [
    290424.5919406931,
    291250.8614102234
   ]
  },
  "min_50m": {
   "gradient_pct": -7.771983536111634,
   "start_distance_m": 2348.0,
   "end_distance_m": 2398.0,
   "midpoint_distance_m": 2373.0,
   "start_elevation_m": 372.96264638348407,
   "end_elevation_m": 369.07665461542825,
   "start_xy": [
    290479.8824516991,
    291235.92897490825
   ],
   "end_xy": [
    290432.3948703648,
    291249.1488847975
   ]
  },
  "min_100m": {
   "gradient_pct": -7.040116760375383,
   "start_distance_m": 2316.0,
   "end_distance_m": 2416.0,
   "midpoint_distance_m": 2366.0,
   "start_elevation_m": 374.808292913898,
   "end_elevation_m": 367.76817615352263,
   "start_xy": [
    290500.1032940654,
    291211.30179130594
   ],
   "end_xy": [
    290414.94113285316,
    291253.4809346148
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.705983791878452,
   "start_distance_m": 692.0,
   "end_distance_m": 694.0,
   "midpoint_distance_m": 693.0,
   "start_elevation_m": 294.03907869982413,
   "end_elevation_m": 294.5931983756617,
   "start_xy": [
    292044.424335301,
    291020.459913259
   ],
   "end_xy": [
    292042.49292862555,
    291019.9406173374
   ]
  },
  "max_3m": {
   "gradient_pct": 26.500556333346974,
   "start_distance_m": 687.0,
   "end_distance_m": 690.0,
   "midpoint_distance_m": 688.5,
   "start_elevation_m": 292.88927641755254,
   "end_elevation_m": 293.68429310755295,
   "start_xy": [
    292049.32273979136,
    291021.4305607872
   ],
   "end_xy": [
    292046.3599740168,
    291020.95937190275
   ]
  }
 },
 "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": 0.16,
   "obstruction_max_height_m": 26.58,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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_290290_20220314dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_28_290291_20220314dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_28_291290_20220314dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_28_291291_20220314dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_28_292290_20220314dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_28_292291_20220314dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:04:30+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_290290_20220314dtm.tif",
   "wg_del_28_290291_20220314dtm.tif",
   "wg_del_28_291290_20220314dtm.tif",
   "wg_del_28_291291_20220314dtm.tif",
   "wg_del_28_292290_20220314dtm.tif",
   "wg_del_28_292291_20220314dtm.tif"
  ],
  "elevation_capture_dates": [
   "14-03-2022"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Llawr-y-glyn",
  "county": "Powys - Powys"
 }
}