{
 "ocl_version": "0.1.0",
 "name": "Peat Lane",
 "slug": "peat-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 51.00959909955378,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 7.0,
   "end_distance_m": 9.0,
   "start_elevation_m": 145.64889914686458,
   "end_elevation_m": 146.66909112885565,
   "min_gradient_pct": -37.962089299333,
   "suppressed_max_gradient_pct": 75.51618721340674,
   "suppressed_location_m": [
    81.0,
    83.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 47.50778495006406,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 75.0,
   "end_distance_m": 78.0,
   "start_elevation_m": 156.31849132964277,
   "end_elevation_m": 157.7437248781447,
   "min_gradient_pct": -29.676684439416096,
   "suppressed_max_gradient_pct": 69.0018488835771,
   "suppressed_location_m": [
    81.0,
    84.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 38.22773499331447,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 6.0,
   "end_distance_m": 11.0,
   "start_elevation_m": 145.3966544549819,
   "end_elevation_m": 147.30804120464762,
   "min_gradient_pct": -15.066553474171087,
   "suppressed_max_gradient_pct": 52.647711410592706,
   "suppressed_location_m": [
    79.0,
    84.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 31.3693908780823,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 6.0,
   "end_distance_m": 16.0,
   "start_elevation_m": 145.3966544549819,
   "end_elevation_m": 148.53359354279013,
   "min_gradient_pct": -9.141058554945403,
   "suppressed_max_gradient_pct": 45.32387670400965,
   "suppressed_location_m": [
    75.0,
    85.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.72182301260156,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "start_elevation_m": 144.06285101775896,
   "end_elevation_m": 149.20721562027927,
   "min_gradient_pct": -6.77198387756448,
   "suppressed_max_gradient_pct": 33.582685440493805,
   "suppressed_location_m": [
    65.0,
    85.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.51398172840834,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "start_elevation_m": 144.06285101775896,
   "end_elevation_m": 149.69134644986104,
   "min_gradient_pct": -6.3762568048159665,
   "suppressed_max_gradient_pct": 30.614848409226056,
   "suppressed_location_m": [
    60.0,
    85.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.591355155762987,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 378.0,
   "end_distance_m": 428.0,
   "start_elevation_m": 203.34835926739635,
   "end_elevation_m": 213.64403684527784,
   "min_gradient_pct": -3.2829608406724446,
   "suppressed_max_gradient_pct": 26.12650200933712,
   "suppressed_location_m": [
    69.0,
    119.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.418897665923907,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 318.0,
   "end_distance_m": 418.0,
   "start_elevation_m": 192.2294193586055,
   "end_elevation_m": 211.6483170245294,
   "min_gradient_pct": -1.4409048422932642,
   "suppressed_max_gradient_pct": 20.39958290660971,
   "suppressed_location_m": [
    62.0,
    162.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.49,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 335.0,
  "shape_class": "stepped"
 },
 "length_m": 3998.3781694695676,
 "start_elevation_m": 144.06285101775896,
 "end_elevation_m": 401.31063711376953,
 "endpoint_gain_m": 257.2477860960106,
 "overall_gradient_pct": 6.433803287049699,
 "accumulated_ascent_m": 269.43250264190215,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 38.22773499331447,
   "start_distance_m": 6.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 8.5,
   "start_elevation_m": 145.3966544549819,
   "end_elevation_m": 147.30804120464762,
   "start_xy": [
    415294.18805059534,
    464329.07119025436
   ],
   "end_xy": [
    415289.22168895416,
    464328.49218071316
   ]
  },
  "max_10m": {
   "gradient_pct": 31.3693908780823,
   "start_distance_m": 6.0,
   "end_distance_m": 16.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 145.3966544549819,
   "end_elevation_m": 148.53359354279013,
   "start_xy": [
    415294.18805059534,
    464329.07119025436
   ],
   "end_xy": [
    415284.255327313,
    464327.9131711719
   ]
  },
  "max_20m": {
   "gradient_pct": 25.72182301260156,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 144.06285101775896,
   "end_elevation_m": 149.20721562027927,
   "start_xy": [
    415299.075,
    464332.147
   ],
   "end_xy": [
    415280.28223799996,
    464327.44996353897
   ]
  },
  "max_25m": {
   "gradient_pct": 22.51398172840834,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 144.06285101775896,
   "end_elevation_m": 149.69134644986104,
   "start_xy": [
    415299.075,
    464332.147
   ],
   "end_xy": [
    415275.31587635877,
    464326.8709539977
   ]
  },
  "max_50m": {
   "gradient_pct": 20.591355155762987,
   "start_distance_m": 378.0,
   "end_distance_m": 428.0,
   "midpoint_distance_m": 403.0,
   "start_elevation_m": 203.34835926739635,
   "end_elevation_m": 213.64403684527784,
   "start_xy": [
    415064.35679298994,
    464151.4668708783
   ],
   "end_xy": [
    415036.1315900676,
    464110.19535645837
   ]
  },
  "max_100m": {
   "gradient_pct": 19.418897665923907,
   "start_distance_m": 318.0,
   "end_distance_m": 418.0,
   "midpoint_distance_m": 368.0,
   "start_elevation_m": 192.2294193586055,
   "end_elevation_m": 211.6483170245294,
   "start_xy": [
    415096.58380777267,
    464201.944103752
   ],
   "end_xy": [
    415041.77591295313,
    464118.45015016646
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -15.066553474171087,
   "start_distance_m": 146.0,
   "end_distance_m": 151.0,
   "midpoint_distance_m": 148.5,
   "start_elevation_m": 171.99815361766005,
   "end_elevation_m": 171.2448259439515,
   "start_xy": [
    415240.28037578217,
    464265.45996809413
   ],
   "end_xy": [
    415235.8662295146,
    464264.469254277
   ]
  },
  "min_10m": {
   "gradient_pct": -9.141058554945403,
   "start_distance_m": 3173.0,
   "end_distance_m": 3183.0,
   "midpoint_distance_m": 3178.0,
   "start_elevation_m": 377.86767547444117,
   "end_elevation_m": 376.95356961894663,
   "start_xy": [
    412863.3313278303,
    464402.97474898805
   ],
   "end_xy": [
    412859.4771608087,
    464412.04953338474
   ]
  },
  "min_20m": {
   "gradient_pct": -6.77198387756448,
   "start_distance_m": 3163.0,
   "end_distance_m": 3183.0,
   "midpoint_distance_m": 3173.0,
   "start_elevation_m": 378.3079663944595,
   "end_elevation_m": 376.95356961894663,
   "start_xy": [
    412868.77242386196,
    464394.5846075157
   ],
   "end_xy": [
    412859.4771608087,
    464412.04953338474
   ]
  },
  "min_25m": {
   "gradient_pct": -6.3762568048159665,
   "start_distance_m": 3157.0,
   "end_distance_m": 3182.0,
   "midpoint_distance_m": 3169.5,
   "start_elevation_m": 378.63006831301266,
   "end_elevation_m": 377.03600411180867,
   "start_xy": [
    412872.0369444856,
    464389.5504337903
   ],
   "end_xy": [
    412859.71417522436,
    464411.0780272516
   ]
  },
  "min_50m": {
   "gradient_pct": -3.2829608406724446,
   "start_distance_m": 3146.0,
   "end_distance_m": 3196.0,
   "midpoint_distance_m": 3171.0,
   "start_elevation_m": 378.66230507931624,
   "end_elevation_m": 377.02082465898,
   "start_xy": [
    412878.0218989623,
    464380.3211152937
   ],
   "end_xy": [
    412850.51101820456,
    464418.46700237336
   ]
  },
  "min_100m": {
   "gradient_pct": -1.4409048422932642,
   "start_distance_m": 3628.0,
   "end_distance_m": 3728.0,
   "midpoint_distance_m": 3678.0,
   "start_elevation_m": 397.5113046572227,
   "end_elevation_m": 396.07039981492943,
   "start_xy": [
    412435.3344704428,
    464371.9913907176
   ],
   "end_xy": [
    412340.647485739,
    464339.8337194731
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 51.00959909955378,
   "start_distance_m": 7.0,
   "end_distance_m": 9.0,
   "midpoint_distance_m": 8.0,
   "start_elevation_m": 145.64889914686458,
   "end_elevation_m": 146.66909112885565,
   "start_xy": [
    415293.1947782671,
    464328.9553883461
   ],
   "end_xy": [
    415291.2082336106,
    464328.7237845296
   ]
  },
  "max_3m": {
   "gradient_pct": 47.50778495006406,
   "start_distance_m": 75.0,
   "end_distance_m": 78.0,
   "midpoint_distance_m": 76.5,
   "start_elevation_m": 156.31849132964277,
   "end_elevation_m": 157.7437248781447,
   "start_xy": [
    415226.1985546735,
    464321.7108515423
   ],
   "end_xy": [
    415223.4908834376,
    464320.41914086335
   ]
  }
 },
 "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": 0.003,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    79.0,
    85.0
   ],
   [
    115.0,
    120.0
   ]
  ],
  "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/england/bulk_dtm_1m/SE1060.tif",
   "data/cache/england/bulk_dtm_1m/SE1560.tif"
  ],
  "calculated_at": "2026-09-01T13:05:14+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12-roads.osm.pbf",
  "osm_snapshot": "2026-08-12T20:21:46Z",
  "run_id": "chunk-07-260901",
  "elevation_provider": "Environment Agency",
  "elevation_dataset": "EA LIDAR Composite DTM 1m (2022)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Environment Agency",
  "elevation_coverage_id": "13787b9a-26a4-4775-8523-806d13af58fc__Lidar_Composite_Elevation_DTM_1m",
  "elevation_tile_ids": [
   "SE1060.tif",
   "SE1560.tif"
  ],
  "canopy_check": "unavailable \u2014 surface model missing: [Errno 28] No space left on device: 'data/cache/england/bulk_dsm_1m/SE1060.tmp.tif'",
  "trimmed_from": "peat-lane",
  "trim_cut_m": [
   [
    3998.4,
    4404.0
   ]
  ],
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Pateley Bridge",
  "county": "North Yorkshire"
 }
}