{
 "ocl_version": "0.1.0",
 "name": "Hungry Lane",
 "slug": "hungry-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.66191149215473,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 440.0,
   "end_distance_m": 442.0,
   "start_elevation_m": 218.4933180250759,
   "end_elevation_m": 218.946556254919,
   "min_gradient_pct": -9.733465539606811
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.4281329980073,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 439.0,
   "end_distance_m": 442.0,
   "start_elevation_m": 218.27371226497877,
   "end_elevation_m": 218.946556254919,
   "min_gradient_pct": -9.186266778378164
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.05056465416476,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 436.0,
   "end_distance_m": 441.0,
   "start_elevation_m": 217.62292642461807,
   "end_elevation_m": 218.7254546573263,
   "min_gradient_pct": -6.798926638175544
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.57620550039468,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 432.0,
   "end_distance_m": 442.0,
   "start_elevation_m": 216.78893570487952,
   "end_elevation_m": 218.946556254919,
   "min_gradient_pct": 0.9103432036536674
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.369329663629117,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 423.0,
   "end_distance_m": 443.0,
   "start_elevation_m": 215.06975516916364,
   "end_elevation_m": 219.14362110188947,
   "min_gradient_pct": 1.617065685074408
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.0677000847636,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 432.0,
   "end_distance_m": 457.0,
   "start_elevation_m": 216.78893570487952,
   "end_elevation_m": 221.80586072607042,
   "min_gradient_pct": 1.721910273849744
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.198938827743234,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 409.0,
   "end_distance_m": 459.0,
   "start_elevation_m": 212.5879768869118,
   "end_elevation_m": 222.18744630078342,
   "min_gradient_pct": 2.3689402452429817
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.31544974223715,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 360.0,
   "end_distance_m": 460.0,
   "start_elevation_m": 205.0164350344926,
   "end_elevation_m": 222.33188477672974,
   "min_gradient_pct": 4.322700400282997
  }
 ],
 "shape": {
  "ascent_concentration": 0.371,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 139.0,
  "shape_class": "sustained"
 },
 "length_m": 804.9573566601367,
 "start_elevation_m": 177.78457395770272,
 "end_elevation_m": 252.98274825347875,
 "endpoint_gain_m": 75.19817429577603,
 "overall_gradient_pct": 9.341882979712384,
 "accumulated_ascent_m": 75.87167326033773,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.05056465416476,
   "start_distance_m": 436.0,
   "end_distance_m": 441.0,
   "midpoint_distance_m": 438.5,
   "start_elevation_m": 217.62292642461807,
   "end_elevation_m": 218.7254546573263,
   "start_xy": [
    417257.6240497907,
    380923.4652163588
   ],
   "end_xy": [
    417260.4013129136,
    380919.3074754401
   ]
  },
  "max_10m": {
   "gradient_pct": 21.57620550039468,
   "start_distance_m": 432.0,
   "end_distance_m": 442.0,
   "midpoint_distance_m": 437.0,
   "start_elevation_m": 216.78893570487952,
   "end_elevation_m": 218.946556254919,
   "start_xy": [
    417255.4022392925,
    380926.7914090937
   ],
   "end_xy": [
    417260.9567655381,
    380918.47592725634
   ]
  },
  "max_20m": {
   "gradient_pct": 20.369329663629117,
   "start_distance_m": 423.0,
   "end_distance_m": 443.0,
   "midpoint_distance_m": 433.0,
   "start_elevation_m": 215.06975516916364,
   "end_elevation_m": 219.14362110188947,
   "start_xy": [
    417250.438824614,
    380934.2979220687
   ],
   "end_xy": [
    417261.51221816265,
    380917.6443790726
   ]
  },
  "max_25m": {
   "gradient_pct": 20.0677000847636,
   "start_distance_m": 432.0,
   "end_distance_m": 457.0,
   "midpoint_distance_m": 444.5,
   "start_elevation_m": 216.78893570487952,
   "end_elevation_m": 221.80586072607042,
   "start_xy": [
    417255.4022392925,
    380926.7914090937
   ],
   "end_xy": [
    417269.24532813346,
    380905.9835623996
   ]
  },
  "max_50m": {
   "gradient_pct": 19.198938827743234,
   "start_distance_m": 409.0,
   "end_distance_m": 459.0,
   "midpoint_distance_m": 434.0,
   "start_elevation_m": 212.5879768869118,
   "end_elevation_m": 222.18744630078342,
   "start_xy": [
    417243.2403872168,
    380946.3055237875
   ],
   "end_xy": [
    417269.86253999517,
    380904.0811824381
   ]
  },
  "max_100m": {
   "gradient_pct": 17.31544974223715,
   "start_distance_m": 360.0,
   "end_distance_m": 460.0,
   "midpoint_distance_m": 410.0,
   "start_elevation_m": 205.0164350344926,
   "end_elevation_m": 222.33188477672974,
   "start_xy": [
    417238.61856548494,
    380993.0233794949
   ],
   "end_xy": [
    417270.171145926,
    380903.1299924574
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.798926638175544,
   "start_distance_m": 180.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 182.5,
   "start_elevation_m": 194.30594668925238,
   "end_elevation_m": 193.9660003573436,
   "start_xy": [
    417245.9339855485,
    381165.55663640366
   ],
   "end_xy": [
    417249.0648605856,
    381161.87381097476
   ]
  },
  "min_10m": {
   "gradient_pct": 0.9103432036536674,
   "start_distance_m": 1.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 6.0,
   "start_elevation_m": 177.82830686669536,
   "end_elevation_m": 177.91934118706072,
   "start_xy": [
    417405.1196583881,
    381167.2325633633
   ],
   "end_xy": [
    417397.0383605096,
    381161.3460480872
   ]
  },
  "min_20m": {
   "gradient_pct": 1.617065685074408,
   "start_distance_m": 1.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 177.82830686669536,
   "end_elevation_m": 178.15172000371024,
   "start_xy": [
    417405.1196583881,
    381167.2325633633
   ],
   "end_xy": [
    417389.0655119741,
    381155.31001576205
   ]
  },
  "min_25m": {
   "gradient_pct": 1.721910273849744,
   "start_distance_m": 1.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 13.5,
   "start_elevation_m": 177.82830686669536,
   "end_elevation_m": 178.2587844351578,
   "start_xy": [
    417405.1196583881,
    381167.2325633633
   ],
   "end_xy": [
    417385.07908770634,
    381152.2919995995
   ]
  },
  "min_50m": {
   "gradient_pct": 2.3689402452429817,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 177.78457395770272,
   "end_elevation_m": 178.9690440803242,
   "start_xy": [
    417405.941,
    381167.803
   ],
   "end_xy": [
    417367.89934583363,
    381135.7353942173
   ]
  },
  "min_100m": {
   "gradient_pct": 4.322700400282997,
   "start_distance_m": 202.0,
   "end_distance_m": 302.0,
   "midpoint_distance_m": 252.0,
   "start_elevation_m": 195.4833127232264,
   "end_elevation_m": 199.8060131235094,
   "start_xy": [
    417259.6739015734,
    381148.61758134485
   ],
   "end_xy": [
    417247.09216174885,
    381050.4010595313
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.66191149215473,
   "start_distance_m": 440.0,
   "end_distance_m": 442.0,
   "midpoint_distance_m": 441.0,
   "start_elevation_m": 218.4933180250759,
   "end_elevation_m": 218.946556254919,
   "start_xy": [
    417259.845860289,
    380920.13902362384
   ],
   "end_xy": [
    417260.9567655381,
    380918.47592725634
   ]
  },
  "max_3m": {
   "gradient_pct": 22.4281329980073,
   "start_distance_m": 439.0,
   "end_distance_m": 442.0,
   "midpoint_distance_m": 440.5,
   "start_elevation_m": 218.27371226497877,
   "end_elevation_m": 218.946556254919,
   "start_xy": [
    417259.29040766443,
    380920.9705718075
   ],
   "end_xy": [
    417260.9567655381,
    380918.47592725634
   ]
  }
 },
 "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": 0.029,
   "obstruction_max_height_m": 9.49,
   "flagged_windows_m": [
    20
   ]
  },
  "review": [],
  "extent": []
 },
 "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/SK1580.tif"
  ],
  "calculated_at": "2026-09-05T01:58:27+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106794610/hunt-gb/regions/region-01.osm.pbf",
  "osm_snapshot": "",
  "run_id": "hunt-england-260905",
  "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": [
   "SK1580.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Bradwell",
  "county": "Derbyshire"
 }
}