{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.5975, -3.7017)",
 "slug": "discovered-lane-52-5975-3-7017",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.95682177667368,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 2044.0,
   "end_distance_m": 2046.0,
   "start_elevation_m": 165.99778438516552,
   "end_elevation_m": 166.776920820699,
   "min_gradient_pct": -78.12265809820502,
   "suppressed_max_gradient_pct": 61.81409166375573,
   "suppressed_location_m": [
    967.0,
    969.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.74503186064415,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 2043.0,
   "end_distance_m": 2046.0,
   "start_elevation_m": 165.88456986487967,
   "end_elevation_m": 166.776920820699,
   "min_gradient_pct": -66.59182330672877,
   "suppressed_max_gradient_pct": 47.193219373015914,
   "suppressed_location_m": [
    967.0,
    970.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.595209192211087,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2206.0,
   "end_distance_m": 2211.0,
   "start_elevation_m": 190.89183792640617,
   "end_elevation_m": 192.22159838601672,
   "min_gradient_pct": -50.82141121777852,
   "suppressed_max_gradient_pct": 30.61568030387548,
   "suppressed_location_m": [
    686.0,
    691.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.042607681294612,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2205.0,
   "end_distance_m": 2215.0,
   "start_elevation_m": 190.75286842792212,
   "end_elevation_m": 193.15712919605159,
   "min_gradient_pct": -34.37576139936425
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.33465123394211,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2192.0,
   "end_distance_m": 2212.0,
   "start_elevation_m": 188.00867549961345,
   "end_elevation_m": 192.47560574640187,
   "min_gradient_pct": -24.62193147718139
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.271463562529675,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2193.0,
   "end_distance_m": 2218.0,
   "start_elevation_m": 188.28326136193033,
   "end_elevation_m": 193.85112725256275,
   "min_gradient_pct": -21.914932792534728
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.1734998821442,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2181.0,
   "end_distance_m": 2231.0,
   "start_elevation_m": 186.06718290306253,
   "end_elevation_m": 196.15393284413463,
   "min_gradient_pct": -13.898498855853745
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.37997110161237,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2159.0,
   "end_distance_m": 2259.0,
   "start_elevation_m": 182.95922216221146,
   "end_elevation_m": 201.33919326382383,
   "min_gradient_pct": -9.350648140488659
  }
 ],
 "shape": {
  "ascent_concentration": 0.402,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 265.0,
  "shape_class": "sustained"
 },
 "length_m": 2277.000000000013,
 "start_elevation_m": 122.53013449302932,
 "end_elevation_m": 201.94226253232682,
 "endpoint_gain_m": 79.4121280392975,
 "overall_gradient_pct": 3.487576988989769,
 "accumulated_ascent_m": 131.72125361011825,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.595209192211087,
   "start_distance_m": 2206.0,
   "end_distance_m": 2211.0,
   "midpoint_distance_m": 2208.5,
   "start_elevation_m": 190.89183792640617,
   "end_elevation_m": 192.22159838601672,
   "start_xy": [
    284787.1273907375,
    301309.3552995729
   ],
   "end_xy": [
    284791.6808383299,
    301311.42075715517
   ]
  },
  "max_10m": {
   "gradient_pct": 24.042607681294612,
   "start_distance_m": 2205.0,
   "end_distance_m": 2215.0,
   "midpoint_distance_m": 2210.0,
   "start_elevation_m": 190.75286842792212,
   "end_elevation_m": 193.15712919605159,
   "start_xy": [
    284786.2167012191,
    301308.9422080565
   ],
   "end_xy": [
    284795.32359640376,
    301313.07312322094
   ]
  },
  "max_20m": {
   "gradient_pct": 22.33465123394211,
   "start_distance_m": 2192.0,
   "end_distance_m": 2212.0,
   "midpoint_distance_m": 2202.0,
   "start_elevation_m": 188.00867549961345,
   "end_elevation_m": 192.47560574640187,
   "start_xy": [
    284774.377737479,
    301303.5720183428
   ],
   "end_xy": [
    284792.59152784833,
    301311.8338486716
   ]
  },
  "max_25m": {
   "gradient_pct": 22.271463562529675,
   "start_distance_m": 2193.0,
   "end_distance_m": 2218.0,
   "midpoint_distance_m": 2205.5,
   "start_elevation_m": 188.28326136193033,
   "end_elevation_m": 193.85112725256275,
   "start_xy": [
    284775.2884269975,
    301303.9851098592
   ],
   "end_xy": [
    284798.05566495913,
    301314.31239777023
   ]
  },
  "max_50m": {
   "gradient_pct": 20.1734998821442,
   "start_distance_m": 2181.0,
   "end_distance_m": 2231.0,
   "midpoint_distance_m": 2206.0,
   "start_elevation_m": 186.06718290306253,
   "end_elevation_m": 196.15393284413463,
   "start_xy": [
    284764.30132048554,
    301299.20545588067
   ],
   "end_xy": [
    284809.89462869917,
    301319.682587484
   ]
  },
  "max_100m": {
   "gradient_pct": 18.37997110161237,
   "start_distance_m": 2159.0,
   "end_distance_m": 2259.0,
   "midpoint_distance_m": 2209.0,
   "start_elevation_m": 182.95922216221146,
   "end_elevation_m": 201.33919326382383,
   "start_xy": [
    284742.8052612501,
    301294.52363600506
   ],
   "end_xy": [
    284835.39393521624,
    301331.24914994434
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -50.82141121777852,
   "start_distance_m": 673.0,
   "end_distance_m": 678.0,
   "midpoint_distance_m": 675.5,
   "start_elevation_m": 132.04962774244888,
   "end_elevation_m": 129.50855718155995,
   "start_xy": [
    283523.93592558417,
    300977.799915364
   ],
   "end_xy": [
    283527.60181807756,
    300974.39973415906
   ]
  },
  "min_10m": {
   "gradient_pct": -34.37576139936425,
   "start_distance_m": 668.0,
   "end_distance_m": 678.0,
   "midpoint_distance_m": 673.0,
   "start_elevation_m": 132.94613332149638,
   "end_elevation_m": 129.50855718155995,
   "start_xy": [
    283520.2700330907,
    300981.200096569
   ],
   "end_xy": [
    283527.60181807756,
    300974.39973415906
   ]
  },
  "min_20m": {
   "gradient_pct": -24.62193147718139,
   "start_distance_m": 658.0,
   "end_distance_m": 678.0,
   "midpoint_distance_m": 668.0,
   "start_elevation_m": 134.43294347699623,
   "end_elevation_m": 129.50855718155995,
   "start_xy": [
    283512.93824810395,
    300988.000458979
   ],
   "end_xy": [
    283527.60181807756,
    300974.39973415906
   ]
  },
  "min_25m": {
   "gradient_pct": -21.914932792534728,
   "start_distance_m": 659.0,
   "end_distance_m": 684.0,
   "midpoint_distance_m": 671.5,
   "start_elevation_m": 134.3099976664498,
   "end_elevation_m": 128.8312644683161,
   "start_xy": [
    283513.67142660264,
    300987.320422738
   ],
   "end_xy": [
    283532.0008890697,
    300970.31951671303
   ]
  },
  "min_50m": {
   "gradient_pct": -13.898498855853745,
   "start_distance_m": 635.0,
   "end_distance_m": 685.0,
   "midpoint_distance_m": 660.0,
   "start_elevation_m": 135.66153076792568,
   "end_elevation_m": 128.7122813399988,
   "start_xy": [
    283495.9099969733,
    301003.3558326913
   ],
   "end_xy": [
    283532.7340675683,
    300969.6394804721
   ]
  },
  "min_100m": {
   "gradient_pct": -9.350648140488659,
   "start_distance_m": 1433.0,
   "end_distance_m": 1533.0,
   "midpoint_distance_m": 1483.0,
   "start_elevation_m": 180.87388556582988,
   "end_elevation_m": 171.52323742534122,
   "start_xy": [
    284189.71216480964,
    301102.4454476123
   ],
   "end_xy": [
    284286.40266829275,
    301127.6461385208
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.95682177667368,
   "start_distance_m": 2044.0,
   "end_distance_m": 2046.0,
   "midpoint_distance_m": 2045.0,
   "start_elevation_m": 165.99778438516552,
   "end_elevation_m": 166.776920820699,
   "start_xy": [
    284630.78323997377,
    301268.5581844827
   ],
   "end_xy": [
    284632.72670227796,
    301269.0303648212
   ]
  },
  "max_3m": {
   "gradient_pct": 29.74503186064415,
   "start_distance_m": 2043.0,
   "end_distance_m": 2046.0,
   "midpoint_distance_m": 2044.5,
   "start_elevation_m": 165.88456986487967,
   "end_elevation_m": 166.776920820699,
   "start_xy": [
    284629.8115088217,
    301268.3220943134
   ],
   "end_xy": [
    284632.72670227796,
    301269.0303648212
   ]
  }
 },
 "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": 0.008,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.353,
   "obstruction_max_height_m": 27.66,
   "flagged_windows_m": [
    5,
    10,
    25,
    50
   ]
  },
  "excluded_ranges_m": [
   [
    674.0,
    680.0
   ],
   [
    687.0,
    692.0
   ],
   [
    966.0,
    971.0
   ]
  ],
  "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_20_282300_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_282301_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_283300_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_283301_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_284300_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_284301_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_285300_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_285301_20220111dtm.tif"
  ],
  "calculated_at": "2026-09-05T06:01:31+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": "summit-260905-summit-wales-wales-2026-08-11",
  "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_20_282300_20220111dtm.tif",
   "wg_del_20_282301_20220111dtm.tif",
   "wg_del_20_283300_20220111dtm.tif",
   "wg_del_20_283301_20220111dtm.tif",
   "wg_del_20_284300_20220111dtm.tif",
   "wg_del_20_284301_20220111dtm.tif",
   "wg_del_20_285300_20220111dtm.tif",
   "wg_del_20_285301_20220111dtm.tif"
  ],
  "elevation_capture_dates": [
   "11-01-2022"
  ],
  "route_summit_trim_m": 457.3,
  "route_summit_trim_loss_m": 9.5,
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cwm Ysberwyn",
  "county": "Powys - Powys"
 }
}