{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.4425, -3.9188)",
 "slug": "discovered-lane-52-4425-3-9188",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.3688024002206,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 585.0,
   "end_distance_m": 587.0,
   "start_elevation_m": 311.48694440638644,
   "end_elevation_m": 312.23432045439085,
   "min_gradient_pct": -13.69164686058184
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.103557088046045,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 584.0,
   "end_distance_m": 587.0,
   "start_elevation_m": 311.1512137417495,
   "end_elevation_m": 312.23432045439085,
   "min_gradient_pct": -9.551672808938369
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.979360039385938,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 583.0,
   "end_distance_m": 588.0,
   "start_elevation_m": 310.901621514592,
   "end_elevation_m": 312.5005895165613,
   "min_gradient_pct": -6.829937846315488
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.664944816518414,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 153.0,
   "end_distance_m": 163.0,
   "start_elevation_m": 274.7449389574374,
   "end_elevation_m": 277.11143343908924,
   "min_gradient_pct": -4.080577419716747
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.88287597726827,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 142.0,
   "end_distance_m": 162.0,
   "start_elevation_m": 272.52712758720253,
   "end_elevation_m": 276.9037027826562,
   "min_gradient_pct": -2.6391156369834334
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.544783112837194,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 141.0,
   "end_distance_m": 166.0,
   "start_elevation_m": 272.3314952644985,
   "end_elevation_m": 277.7176910427078,
   "min_gradient_pct": -1.8771464530452704
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.99979982759305,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 139.0,
   "end_distance_m": 189.0,
   "start_elevation_m": 271.93395422629567,
   "end_elevation_m": 281.9338541400922,
   "min_gradient_pct": -0.21153988933713208
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.01703933251065,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 118.0,
   "end_distance_m": 218.0,
   "start_elevation_m": 268.7237173870911,
   "end_elevation_m": 285.74075671960173,
   "min_gradient_pct": 0.970441976201414
  }
 ],
 "shape": {
  "ascent_concentration": 0.357,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 117.0,
  "shape_class": "sustained"
 },
 "length_m": 1357.323261150704,
 "start_elevation_m": 265.0321382037354,
 "end_elevation_m": 360.06174317675635,
 "endpoint_gain_m": 95.02960497302092,
 "overall_gradient_pct": 7.001250747921114,
 "accumulated_ascent_m": 98.61053298814505,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.979360039385938,
   "start_distance_m": 583.0,
   "end_distance_m": 588.0,
   "midpoint_distance_m": 585.5,
   "start_elevation_m": 310.901621514592,
   "end_elevation_m": 312.5005895165613,
   "start_xy": [
    269672.4656263654,
    284465.06279660005
   ],
   "end_xy": [
    269670.29539056245,
    284460.5975610606
   ]
  },
  "max_10m": {
   "gradient_pct": 23.664944816518414,
   "start_distance_m": 153.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 158.0,
   "start_elevation_m": 274.7449389574374,
   "end_elevation_m": 277.11143343908924,
   "start_xy": [
    269292.1767515168,
    284577.3096595789
   ],
   "end_xy": [
    269298.761384903,
    284569.7835315459
   ]
  },
  "max_20m": {
   "gradient_pct": 21.88287597726827,
   "start_distance_m": 142.0,
   "end_distance_m": 162.0,
   "midpoint_distance_m": 152.0,
   "start_elevation_m": 272.52712758720253,
   "end_elevation_m": 276.9037027826562,
   "start_xy": [
    269284.93365479197,
    284585.5884004152
   ],
   "end_xy": [
    269298.10292156436,
    284570.5361443492
   ]
  },
  "max_25m": {
   "gradient_pct": 21.544783112837194,
   "start_distance_m": 141.0,
   "end_distance_m": 166.0,
   "midpoint_distance_m": 153.5,
   "start_elevation_m": 272.3314952644985,
   "end_elevation_m": 277.7176910427078,
   "start_xy": [
    269284.27519145334,
    284586.3410132185
   ],
   "end_xy": [
    269300.73677491886,
    284567.525693136
   ]
  },
  "max_50m": {
   "gradient_pct": 19.99979982759305,
   "start_distance_m": 139.0,
   "end_distance_m": 189.0,
   "midpoint_distance_m": 164.0,
   "start_elevation_m": 271.93395422629567,
   "end_elevation_m": 281.9338541400922,
   "start_xy": [
    269282.9582647761,
    284587.8462388251
   ],
   "end_xy": [
    269316.26743534004,
    284550.6497060962
   ]
  },
  "max_100m": {
   "gradient_pct": 17.01703933251065,
   "start_distance_m": 118.0,
   "end_distance_m": 218.0,
   "midpoint_distance_m": 168.0,
   "start_elevation_m": 268.7237173870911,
   "end_elevation_m": 285.74075671960173,
   "start_xy": [
    269265.26441100024,
    284597.03308551543
   ],
   "end_xy": [
    269340.5720054859,
    284534.98893251823
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.829937846315488,
   "start_distance_m": 825.0,
   "end_distance_m": 830.0,
   "midpoint_distance_m": 827.5,
   "start_elevation_m": 327.57584572175426,
   "end_elevation_m": 327.2343488294385,
   "start_xy": [
    269493.9264669011,
    284302.63951713336
   ],
   "end_xy": [
    269490.1437587356,
    284299.36978947883
   ]
  },
  "min_10m": {
   "gradient_pct": -4.080577419716747,
   "start_distance_m": 825.0,
   "end_distance_m": 835.0,
   "midpoint_distance_m": 830.0,
   "start_elevation_m": 327.57584572175426,
   "end_elevation_m": 327.1677879797826,
   "start_xy": [
    269493.9264669011,
    284302.63951713336
   ],
   "end_xy": [
    269486.3610505701,
    284296.1000618243
   ]
  },
  "min_20m": {
   "gradient_pct": -2.6391156369834334,
   "start_distance_m": 825.0,
   "end_distance_m": 845.0,
   "midpoint_distance_m": 835.0,
   "start_elevation_m": 327.57584572175426,
   "end_elevation_m": 327.0480225943576,
   "start_xy": [
    269493.9264669011,
    284302.63951713336
   ],
   "end_xy": [
    269478.79563423916,
    284289.56060651527
   ]
  },
  "min_25m": {
   "gradient_pct": -1.8771464530452704,
   "start_distance_m": 825.0,
   "end_distance_m": 850.0,
   "midpoint_distance_m": 837.5,
   "start_elevation_m": 327.57584572175426,
   "end_elevation_m": 327.10655910849295,
   "start_xy": [
    269493.9264669011,
    284302.63951713336
   ],
   "end_xy": [
    269478.4053462984,
    284287.3277452484
   ]
  },
  "min_50m": {
   "gradient_pct": -0.21153988933713208,
   "start_distance_m": 799.0,
   "end_distance_m": 849.0,
   "midpoint_distance_m": 824.0,
   "start_elevation_m": 327.18695722616036,
   "end_elevation_m": 327.0811872814918,
   "start_xy": [
    269513.59654936165,
    284319.64210093685
   ],
   "end_xy": [
    269477.4124824715,
    284287.4469988486
   ]
  },
  "min_100m": {
   "gradient_pct": 0.970441976201414,
   "start_distance_m": 774.0,
   "end_distance_m": 874.0,
   "midpoint_distance_m": 824.0,
   "start_elevation_m": 326.6729826143816,
   "end_elevation_m": 327.64342459058304,
   "start_xy": [
    269532.5100901891,
    284335.9907392094
   ],
   "end_xy": [
    269502.23407814495,
    284284.46565884387
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.3688024002206,
   "start_distance_m": 585.0,
   "end_distance_m": 587.0,
   "midpoint_distance_m": 586.0,
   "start_elevation_m": 311.48694440638644,
   "end_elevation_m": 312.23432045439085,
   "start_xy": [
    269671.6847402389,
    284463.22154244664
   ],
   "end_xy": [
    269670.9038541124,
    284461.38028829324
   ]
  },
  "max_3m": {
   "gradient_pct": 36.103557088046045,
   "start_distance_m": 584.0,
   "end_distance_m": 587.0,
   "midpoint_distance_m": 585.5,
   "start_elevation_m": 311.1512137417495,
   "end_elevation_m": 312.23432045439085,
   "start_xy": [
    269672.0751833021,
    284464.14216952334
   ],
   "end_xy": [
    269670.9038541124,
    284461.38028829324
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.023,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.245,
   "obstruction_max_height_m": 24.19,
   "flagged_windows_m": [
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    410.0,
    440.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "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_22_269284_20220114dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_22_270284_20220114dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:09:04+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_22_269284_20220114dtm.tif",
   "wg_del_22_270284_20220114dtm.tif"
  ],
  "elevation_capture_dates": [
   "14-01-2022"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cwmsymlog",
  "county": "Sir Ceredigion - Ceredigion"
 }
}