{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.4962, -3.5284)",
 "slug": "discovered-lane-52-4962-3-5284",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.769829316865867,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 527.0,
   "end_distance_m": 529.0,
   "start_elevation_m": 183.33358492040267,
   "end_elevation_m": 183.84898150674,
   "min_gradient_pct": -7.479148121483092
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.87638797878545,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 526.0,
   "end_distance_m": 529.0,
   "start_elevation_m": 183.07268986737643,
   "end_elevation_m": 183.84898150674,
   "min_gradient_pct": -7.025269100171272
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.219154836165103,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 524.0,
   "end_distance_m": 529.0,
   "start_elevation_m": 182.58802376493173,
   "end_elevation_m": 183.84898150674,
   "min_gradient_pct": -5.879886931263627
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.26442187546229,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 519.0,
   "end_distance_m": 529.0,
   "start_elevation_m": 181.42253931919376,
   "end_elevation_m": 183.84898150674,
   "min_gradient_pct": -2.8218913663124567
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.25800856833365,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 510.0,
   "end_distance_m": 530.0,
   "start_elevation_m": 179.7753566994314,
   "end_elevation_m": 184.02695841309813,
   "min_gradient_pct": 0.7601829561288298
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.49606668048,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 511.0,
   "end_distance_m": 536.0,
   "start_elevation_m": 179.9351537550199,
   "end_elevation_m": 185.0591704251399,
   "min_gradient_pct": 1.378939992724213
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.208177396018982,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 486.0,
   "end_distance_m": 536.0,
   "start_elevation_m": 176.45508172713042,
   "end_elevation_m": 185.0591704251399,
   "min_gradient_pct": 1.5763183409267185
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.569596162394278,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 436.0,
   "end_distance_m": 536.0,
   "start_elevation_m": 171.48957426274563,
   "end_elevation_m": 185.0591704251399,
   "min_gradient_pct": 1.8738895317433446
  }
 ],
 "shape": {
  "ascent_concentration": 0.362,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 89.0,
  "shape_class": "sustained"
 },
 "length_m": 536.3828152367357,
 "start_elevation_m": 142.59908692581135,
 "end_elevation_m": 185.1444423557109,
 "endpoint_gain_m": 42.54535542989956,
 "overall_gradient_pct": 7.9319012879116775,
 "accumulated_ascent_m": 43.109534754570234,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.219154836165103,
   "start_distance_m": 524.0,
   "end_distance_m": 529.0,
   "midpoint_distance_m": 526.5,
   "start_elevation_m": 182.58802376493173,
   "end_elevation_m": 183.84898150674,
   "start_xy": [
    296349.2829835286,
    289835.2760287498
   ],
   "end_xy": [
    296346.1750539579,
    289831.3592987638
   ]
  },
  "max_10m": {
   "gradient_pct": 24.26442187546229,
   "start_distance_m": 519.0,
   "end_distance_m": 529.0,
   "midpoint_distance_m": 524.0,
   "start_elevation_m": 181.42253931919376,
   "end_elevation_m": 183.84898150674,
   "start_xy": [
    296352.3909130994,
    289839.1927587358
   ],
   "end_xy": [
    296346.1750539579,
    289831.3592987638
   ]
  },
  "max_20m": {
   "gradient_pct": 21.25800856833365,
   "start_distance_m": 510.0,
   "end_distance_m": 530.0,
   "midpoint_distance_m": 520.0,
   "start_elevation_m": 179.7753566994314,
   "end_elevation_m": 184.02695841309813,
   "start_xy": [
    296357.9851863267,
    289846.24287271063
   ],
   "end_xy": [
    296345.55346804374,
    289830.5759527666
   ]
  },
  "max_25m": {
   "gradient_pct": 20.49606668048,
   "start_distance_m": 511.0,
   "end_distance_m": 536.0,
   "midpoint_distance_m": 523.5,
   "start_elevation_m": 179.9351537550199,
   "end_elevation_m": 185.0591704251399,
   "start_xy": [
    296357.36360041256,
    289845.4595267135
   ],
   "end_xy": [
    296341.82395255886,
    289825.8758767834
   ]
  },
  "max_50m": {
   "gradient_pct": 17.208177396018982,
   "start_distance_m": 486.0,
   "end_distance_m": 536.0,
   "midpoint_distance_m": 511.0,
   "start_elevation_m": 176.45508172713042,
   "end_elevation_m": 185.0591704251399,
   "start_xy": [
    296372.9032482662,
    289865.04317664355
   ],
   "end_xy": [
    296341.82395255886,
    289825.8758767834
   ]
  },
  "max_100m": {
   "gradient_pct": 13.569596162394278,
   "start_distance_m": 436.0,
   "end_distance_m": 536.0,
   "midpoint_distance_m": 486.0,
   "start_elevation_m": 171.48957426274563,
   "end_elevation_m": 185.0591704251399,
   "start_xy": [
    296413.6656977058,
    289887.411783168
   ],
   "end_xy": [
    296341.82395255886,
    289825.8758767834
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.879886931263627,
   "start_distance_m": 416.0,
   "end_distance_m": 421.0,
   "midpoint_distance_m": 418.5,
   "start_elevation_m": 171.27958232130823,
   "end_elevation_m": 170.98558797474504,
   "start_xy": [
    296428.5125531708,
    289874.99764032796
   ],
   "end_xy": [
    296425.14155713207,
    289878.6903880457
   ]
  },
  "min_10m": {
   "gradient_pct": -2.8218913663124567,
   "start_distance_m": 415.0,
   "end_distance_m": 425.0,
   "midpoint_distance_m": 420.0,
   "start_elevation_m": 171.2786839674638,
   "end_elevation_m": 170.99649483083255,
   "start_xy": [
    296429.2074023452,
    289874.63184952893
   ],
   "end_xy": [
    296422.44476030103,
    289881.64458621986
   ]
  },
  "min_20m": {
   "gradient_pct": 0.7601829561288298,
   "start_distance_m": 415.0,
   "end_distance_m": 435.0,
   "midpoint_distance_m": 425.0,
   "start_elevation_m": 171.2786839674638,
   "end_elevation_m": 171.43072055868956,
   "start_xy": [
    296429.2074023452,
    289874.63184952893
   ],
   "end_xy": [
    296414.64210629184,
    289887.1958519912
   ]
  },
  "min_25m": {
   "gradient_pct": 1.378939992724213,
   "start_distance_m": 52.0,
   "end_distance_m": 77.0,
   "midpoint_distance_m": 64.5,
   "start_elevation_m": 143.6067201443602,
   "end_elevation_m": 143.95145514254125,
   "start_xy": [
    296736.0917896438,
    289989.33931266767
   ],
   "end_xy": [
    296712.6752925221,
    289990.6276828142
   ]
  },
  "min_50m": {
   "gradient_pct": 1.5763183409267185,
   "start_distance_m": 44.0,
   "end_distance_m": 94.0,
   "midpoint_distance_m": 69.0,
   "start_elevation_m": 143.4360673621639,
   "end_elevation_m": 144.22422653262726,
   "start_xy": [
    296742.18186144147,
    289984.15172888525
   ],
   "end_xy": [
    296697.29853454645,
    289983.94306264305
   ]
  },
  "min_100m": {
   "gradient_pct": 1.8738895317433446,
   "start_distance_m": 1.0,
   "end_distance_m": 101.0,
   "midpoint_distance_m": 51.0,
   "start_elevation_m": 142.58627512995108,
   "end_elevation_m": 144.46016466169442,
   "start_xy": [
    296775.08818182576,
    289956.4720571701
   ],
   "end_xy": [
    296690.5556399444,
    289982.06333596475
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.769829316865867,
   "start_distance_m": 527.0,
   "end_distance_m": 529.0,
   "midpoint_distance_m": 528.0,
   "start_elevation_m": 183.33358492040267,
   "end_elevation_m": 183.84898150674,
   "start_xy": [
    296347.4182257862,
    289832.9259907582
   ],
   "end_xy": [
    296346.1750539579,
    289831.3592987638
   ]
  },
  "max_3m": {
   "gradient_pct": 25.87638797878545,
   "start_distance_m": 526.0,
   "end_distance_m": 529.0,
   "midpoint_distance_m": 527.5,
   "start_elevation_m": 183.07268986737643,
   "end_elevation_m": 183.84898150674,
   "start_xy": [
    296348.03981170035,
    289833.7093367554
   ],
   "end_xy": [
    296346.1750539579,
    289831.3592987638
   ]
  }
 },
 "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": 0.048,
   "obstruction_max_height_m": 14.27,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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_28_296289_20220314dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_28_296290_20220314dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:08:46+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_296289_20220314dtm.tif",
   "wg_del_28_296290_20220314dtm.tif"
  ],
  "elevation_capture_dates": [
   "14-03-2022"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Trefeglwys",
  "county": "Powys - Powys"
 }
}