{
 "ocl_version": "0.1.0",
 "name": "Slade Lane",
 "slug": "slade-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.269370219680354,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 136.0,
   "end_distance_m": 138.0,
   "start_elevation_m": 143.9571891236133,
   "end_elevation_m": 144.7225765280069,
   "min_gradient_pct": -5.003028887264804,
   "suppressed_max_gradient_pct": 52.22102216459206,
   "suppressed_location_m": [
    132.0,
    134.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.720400974918032,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 136.0,
   "end_distance_m": 139.0,
   "start_elevation_m": 143.9571891236133,
   "end_elevation_m": 144.87880115286083,
   "min_gradient_pct": -3.594084479170571,
   "suppressed_max_gradient_pct": 45.11250880706162,
   "suppressed_location_m": [
    131.0,
    134.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.379360921332022,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 49.0,
   "end_distance_m": 54.0,
   "start_elevation_m": 126.97453301993869,
   "end_elevation_m": 128.0435010660053,
   "min_gradient_pct": -2.248889093370394,
   "suppressed_max_gradient_pct": 33.67321279342491,
   "suppressed_location_m": [
    132.0,
    137.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.986537223666346,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 71.0,
   "end_distance_m": 81.0,
   "start_elevation_m": 131.35920910438128,
   "end_elevation_m": 133.4578628267479,
   "min_gradient_pct": -1.745902343612613,
   "suppressed_max_gradient_pct": 28.761535376004872,
   "suppressed_location_m": [
    128.0,
    138.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.608788145287917,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 60.0,
   "end_distance_m": 80.0,
   "start_elevation_m": 129.12768211939047,
   "end_elevation_m": 133.24943974844805,
   "min_gradient_pct": 0.2738447287724455,
   "suppressed_max_gradient_pct": 22.989827306141137,
   "suppressed_location_m": [
    118.0,
    138.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.45044401984387,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 59.0,
   "end_distance_m": 84.0,
   "start_elevation_m": 128.92664436707642,
   "end_elevation_m": 134.0392553720374,
   "min_gradient_pct": 1.2901728355902833,
   "suppressed_max_gradient_pct": 21.80942580407452,
   "suppressed_location_m": [
    114.0,
    139.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.888417728776517,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 36.0,
   "end_distance_m": 86.0,
   "start_elevation_m": 124.4684287103536,
   "end_elevation_m": 134.41263757474186,
   "min_gradient_pct": 3.2794249480654685,
   "suppressed_max_gradient_pct": 20.005452650184566,
   "suppressed_location_m": [
    89.0,
    139.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.919539404769708,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 25.0,
   "end_distance_m": 125.0,
   "start_elevation_m": 122.46889181365073,
   "end_elevation_m": 141.38843121842044,
   "min_gradient_pct": 4.383931878712787,
   "suppressed_max_gradient_pct": 19.893119987763555,
   "suppressed_location_m": [
    38.0,
    138.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.427,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 144.0,
  "shape_class": "sustained"
 },
 "length_m": 376.2013526514609,
 "start_elevation_m": 119.28021825830227,
 "end_elevation_m": 162.6317248021681,
 "endpoint_gain_m": 43.351506543865824,
 "overall_gradient_pct": 11.523485026921122,
 "accumulated_ascent_m": 43.936452900970934,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.379360921332022,
   "start_distance_m": 49.0,
   "end_distance_m": 54.0,
   "midpoint_distance_m": 51.5,
   "start_elevation_m": 126.97453301993869,
   "end_elevation_m": 128.0435010660053,
   "start_xy": [
    407285.5973746827,
    442785.4874558207
   ],
   "end_xy": [
    407285.8611466734,
    442790.4804934069
   ]
  },
  "max_10m": {
   "gradient_pct": 20.986537223666346,
   "start_distance_m": 71.0,
   "end_distance_m": 81.0,
   "midpoint_distance_m": 76.0,
   "start_elevation_m": 131.35920910438128,
   "end_elevation_m": 133.4578628267479,
   "start_xy": [
    407288.5598830889,
    442807.2236501257
   ],
   "end_xy": [
    407290.6190863326,
    442817.00784138986
   ]
  },
  "max_20m": {
   "gradient_pct": 20.608788145287917,
   "start_distance_m": 60.0,
   "end_distance_m": 80.0,
   "midpoint_distance_m": 70.0,
   "start_elevation_m": 129.12768211939047,
   "end_elevation_m": 133.24943974844805,
   "start_xy": [
    407286.3250061323,
    442796.45307330793
   ],
   "end_xy": [
    407290.3884187807,
    442816.0359402494
   ]
  },
  "max_25m": {
   "gradient_pct": 20.45044401984387,
   "start_distance_m": 59.0,
   "end_distance_m": 84.0,
   "midpoint_distance_m": 71.5,
   "start_elevation_m": 128.92664436707642,
   "end_elevation_m": 134.0392553720374,
   "start_xy": [
    407286.1249186641,
    442795.47353099304
   ],
   "end_xy": [
    407291.5684081836,
    442819.8465850967
   ]
  },
  "max_50m": {
   "gradient_pct": 19.888417728776517,
   "start_distance_m": 36.0,
   "end_distance_m": 86.0,
   "midpoint_distance_m": 61.0,
   "start_elevation_m": 124.4684287103536,
   "end_elevation_m": 134.41263757474186,
   "start_xy": [
    407284.9115675069,
    442772.5055580966
   ],
   "end_xy": [
    407292.8340402767,
    442821.39518943755
   ]
  },
  "max_100m": {
   "gradient_pct": 18.919539404769708,
   "start_distance_m": 25.0,
   "end_distance_m": 125.0,
   "midpoint_distance_m": 75.0,
   "start_elevation_m": 122.46889181365073,
   "end_elevation_m": 141.38843121842044,
   "start_xy": [
    407284.3312691273,
    442761.5208754071
   ],
   "end_xy": [
    407327.63199648936,
    442817.27994525287
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.248889093370394,
   "start_distance_m": 242.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 244.5,
   "start_elevation_m": 156.16120139878177,
   "end_elevation_m": 156.04875694411325,
   "start_xy": [
    407443.67814040574,
    442806.68551920855
   ],
   "end_xy": [
    407448.67493634403,
    442806.8644894597
   ]
  },
  "min_10m": {
   "gradient_pct": -1.745902343612613,
   "start_distance_m": 241.0,
   "end_distance_m": 251.0,
   "midpoint_distance_m": 246.0,
   "start_elevation_m": 156.1739238990633,
   "end_elevation_m": 155.99933366470205,
   "start_xy": [
    407442.67878121807,
    442806.64972515835
   ],
   "end_xy": [
    407450.5382836902,
    442807.50856393226
   ]
  },
  "min_20m": {
   "gradient_pct": 0.2738447287724455,
   "start_distance_m": 237.0,
   "end_distance_m": 257.0,
   "midpoint_distance_m": 247.0,
   "start_elevation_m": 156.20990572451686,
   "end_elevation_m": 156.26467467027135,
   "start_xy": [
    407438.6813444674,
    442806.50654895743
   ],
   "end_xy": [
    407445.26384311373,
    442810.3686822173
   ]
  },
  "min_25m": {
   "gradient_pct": 1.2901728355902833,
   "start_distance_m": 237.0,
   "end_distance_m": 262.0,
   "midpoint_distance_m": 249.5,
   "start_elevation_m": 156.20990572451686,
   "end_elevation_m": 156.53244893341443,
   "start_xy": [
    407438.6813444674,
    442806.50654895743
   ],
   "end_xy": [
    407440.8684759666,
    442812.75211412157
   ]
  },
  "min_50m": {
   "gradient_pct": 3.2794249480654685,
   "start_distance_m": 237.0,
   "end_distance_m": 287.0,
   "midpoint_distance_m": 262.0,
   "start_elevation_m": 156.20990572451686,
   "end_elevation_m": 157.8496181985496,
   "start_xy": [
    407438.6813444674,
    442806.50654895743
   ],
   "end_xy": [
    407419.27237351984,
    442825.296838872
   ]
  },
  "min_100m": {
   "gradient_pct": 4.383931878712787,
   "start_distance_m": 237.0,
   "end_distance_m": 337.0,
   "midpoint_distance_m": 287.0,
   "start_elevation_m": 156.20990572451686,
   "end_elevation_m": 160.59383760322964,
   "start_xy": [
    407438.6813444674,
    442806.50654895743
   ],
   "end_xy": [
    407378.25007749465,
    442853.8656378186
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.269370219680354,
   "start_distance_m": 136.0,
   "end_distance_m": 138.0,
   "midpoint_distance_m": 137.0,
   "start_elevation_m": 143.9571891236133,
   "end_elevation_m": 144.7225765280069,
   "start_xy": [
    407338.254201507,
    442814.4714103617
   ],
   "end_xy": [
    407340.2123713626,
    442814.0645064212
   ]
  },
  "max_3m": {
   "gradient_pct": 30.720400974918032,
   "start_distance_m": 136.0,
   "end_distance_m": 139.0,
   "midpoint_distance_m": 137.5,
   "start_elevation_m": 143.9571891236133,
   "end_elevation_m": 144.87880115286083,
   "start_xy": [
    407338.254201507,
    442814.4714103617
   ],
   "end_xy": [
    407341.19145629037,
    442813.861054451
   ]
  }
 },
 "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": 0.016,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.095,
   "obstruction_max_height_m": 10.49,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    130.0,
    135.0
   ]
  ],
  "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/SE0540.tif"
  ],
  "calculated_at": "2026-09-01T12:39:16+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": [
   "SE0540.tif"
  ],
  "trimmed_from": "slade-lane",
  "trim_cut_m": [
   [
    376.2,
    448.6
   ]
  ],
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Stockbridge",
  "county": ""
 }
}