{
 "ocl_version": "0.1.0",
 "name": "Hawkin's Lane",
 "slug": "hawkin-s-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.333435871164625,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 624.0,
   "end_distance_m": 626.0,
   "start_elevation_m": 234.05062159334062,
   "end_elevation_m": 234.85729031076391,
   "min_gradient_pct": -17.810409552426165
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.52110102973719,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 623.0,
   "end_distance_m": 626.0,
   "start_elevation_m": 233.7916572798718,
   "end_elevation_m": 234.85729031076391,
   "min_gradient_pct": -16.294826212712604
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.47811941493717,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 622.0,
   "end_distance_m": 627.0,
   "start_elevation_m": 233.63283349261093,
   "end_elevation_m": 235.0567394633578,
   "min_gradient_pct": -11.56976499752318
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.69958702770299,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 643.0,
   "end_distance_m": 653.0,
   "start_elevation_m": 237.41310544837742,
   "end_elevation_m": 239.88306415114772,
   "min_gradient_pct": -6.84358675461425
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.668551343790995,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 636.0,
   "end_distance_m": 656.0,
   "start_elevation_m": 235.91870080575293,
   "end_elevation_m": 240.45241107451113,
   "min_gradient_pct": -5.783050704922488
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.67143973267025,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 632.0,
   "end_distance_m": 657.0,
   "start_elevation_m": 235.21729371640578,
   "end_elevation_m": 240.63515364957334,
   "min_gradient_pct": -5.605067292159447
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.842592612995986,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 610.0,
   "end_distance_m": 660.0,
   "start_elevation_m": 231.2109287321383,
   "end_elevation_m": 241.1322250386363,
   "min_gradient_pct": -2.581581051061562
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.642611822942627,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 593.0,
   "end_distance_m": 693.0,
   "start_elevation_m": 228.38397061293972,
   "end_elevation_m": 247.02658243588235,
   "min_gradient_pct": -1.1050046369208246
  }
 ],
 "shape": {
  "ascent_concentration": 0.386,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 220.0,
  "shape_class": "sustained"
 },
 "length_m": 701.916285500078,
 "start_elevation_m": 176.49997274516306,
 "end_elevation_m": 247.98647733434592,
 "endpoint_gain_m": 71.48650458918286,
 "overall_gradient_pct": 10.184477275413625,
 "accumulated_ascent_m": 75.47022058693847,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.47811941493717,
   "start_distance_m": 622.0,
   "end_distance_m": 627.0,
   "midpoint_distance_m": 624.5,
   "start_elevation_m": 233.63283349261093,
   "end_elevation_m": 235.0567394633578,
   "start_xy": [
    304995.2649881569,
    128553.31906515747
   ],
   "end_xy": [
    304999.77312375087,
    128551.15649412593
   ]
  },
  "max_10m": {
   "gradient_pct": 24.69958702770299,
   "start_distance_m": 643.0,
   "end_distance_m": 653.0,
   "midpoint_distance_m": 648.0,
   "start_elevation_m": 237.41310544837742,
   "end_elevation_m": 239.88306415114772,
   "start_xy": [
    305008.75713344326,
    128538.07076858924
   ],
   "end_xy": [
    305012.9656245839,
    128528.99946205055
   ]
  },
  "max_20m": {
   "gradient_pct": 22.668551343790995,
   "start_distance_m": 636.0,
   "end_distance_m": 656.0,
   "midpoint_distance_m": 646.0,
   "start_elevation_m": 235.91870080575293,
   "end_elevation_m": 240.45241107451113,
   "start_xy": [
    305005.53672418447,
    128544.24698146965
   ],
   "end_xy": [
    305014.2281719261,
    128526.27807008894
   ]
  },
  "max_25m": {
   "gradient_pct": 21.67143973267025,
   "start_distance_m": 632.0,
   "end_distance_m": 657.0,
   "midpoint_distance_m": 644.5,
   "start_elevation_m": 235.21729371640578,
   "end_elevation_m": 240.63515364957334,
   "start_xy": [
    305002.9779485722,
    128547.32150051597
   ],
   "end_xy": [
    305014.6490210402,
    128525.37093943507
   ]
  },
  "max_50m": {
   "gradient_pct": 19.842592612995986,
   "start_distance_m": 610.0,
   "end_distance_m": 660.0,
   "midpoint_distance_m": 635.0,
   "start_elevation_m": 231.2109287321383,
   "end_elevation_m": 241.1322250386363,
   "start_xy": [
    304984.18484930013,
    128557.86743961019
   ],
   "end_xy": [
    305015.91156838235,
    128522.64954747347
   ]
  },
  "max_100m": {
   "gradient_pct": 18.642611822942627,
   "start_distance_m": 593.0,
   "end_distance_m": 693.0,
   "midpoint_distance_m": 643.0,
   "start_elevation_m": 228.38397061293972,
   "end_elevation_m": 247.02658243588235,
   "start_xy": [
    304969.00243742665,
    128565.43859937016
   ],
   "end_xy": [
    305029.79958914657,
    128492.71423589578
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.56976499752318,
   "start_distance_m": 27.0,
   "end_distance_m": 32.0,
   "midpoint_distance_m": 29.5,
   "start_elevation_m": 175.38990383961337,
   "end_elevation_m": 174.8114155897372,
   "start_xy": [
    304963.1404640823,
    128809.8284937914
   ],
   "end_xy": [
    304958.25189671316,
    128808.77877522087
   ]
  },
  "min_10m": {
   "gradient_pct": -6.84358675461425,
   "start_distance_m": 21.0,
   "end_distance_m": 31.0,
   "midpoint_distance_m": 26.0,
   "start_elevation_m": 175.50589322976023,
   "end_elevation_m": 174.8215345542988,
   "start_xy": [
    304969.0944249613,
    128810.3028442466
   ],
   "end_xy": [
    304959.229610187,
    128808.98871893497
   ]
  },
  "min_20m": {
   "gradient_pct": -5.783050704922488,
   "start_distance_m": 11.0,
   "end_distance_m": 31.0,
   "midpoint_distance_m": 21.0,
   "start_elevation_m": 175.9781446952833,
   "end_elevation_m": 174.8215345542988,
   "start_xy": [
    304979.0914876401,
    128810.32873897227
   ],
   "end_xy": [
    304959.229610187,
    128808.98871893497
   ]
  },
  "min_25m": {
   "gradient_pct": -5.605067292159447,
   "start_distance_m": 6.0,
   "end_distance_m": 31.0,
   "midpoint_distance_m": 18.5,
   "start_elevation_m": 176.22280137733867,
   "end_elevation_m": 174.8215345542988,
   "start_xy": [
    304984.0800662202,
    128809.99097611122
   ],
   "end_xy": [
    304959.229610187,
    128808.98871893497
   ]
  },
  "min_50m": {
   "gradient_pct": -2.581581051061562,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 176.49997274516306,
   "end_elevation_m": 175.20918221963228,
   "start_xy": [
    304989.881,
    128810.727
   ],
   "end_xy": [
    304940.4735181451,
    128806.0372449292
   ]
  },
  "min_100m": {
   "gradient_pct": -1.1050046369208246,
   "start_distance_m": 1.0,
   "end_distance_m": 101.0,
   "midpoint_distance_m": 51.0,
   "start_elevation_m": 176.48065460305827,
   "end_elevation_m": 175.37564996613744,
   "start_xy": [
    304988.9559408287,
    128810.34717697586
   ],
   "end_xy": [
    304891.3245769558,
    128818.28549597782
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.333435871164625,
   "start_distance_m": 624.0,
   "end_distance_m": 626.0,
   "midpoint_distance_m": 625.0,
   "start_elevation_m": 234.05062159334062,
   "end_elevation_m": 234.85729031076391,
   "start_xy": [
    304997.0682423945,
    128552.45403674485
   ],
   "end_xy": [
    304998.87149663205,
    128551.58900833224
   ]
  },
  "max_3m": {
   "gradient_pct": 35.52110102973719,
   "start_distance_m": 623.0,
   "end_distance_m": 626.0,
   "midpoint_distance_m": 624.5,
   "start_elevation_m": 233.7916572798718,
   "end_elevation_m": 234.85729031076391,
   "start_xy": [
    304996.16661527567,
    128552.88655095117
   ],
   "end_xy": [
    304998.87149663205,
    128551.58900833224
   ]
  }
 },
 "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": 0.206,
   "obstruction_max_height_m": 20.14,
   "flagged_windows_m": [
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "descends_at_start",
   "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/england/bulk_dtm_1m/ST0025.tif",
   "data/cache/england/bulk_dtm_1m/ST0525.tif"
  ],
  "calculated_at": "2026-09-05T01:21:56+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106792346/hunt-gb/regions/region-08.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": [
   "ST0025.tif",
   "ST0525.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Huish Champflower",
  "county": "Somerset"
 }
}