{
 "ocl_version": "0.1.0",
 "name": "St Georges Lane",
 "slug": "st-georges-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 47.15260840252338,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 163.0,
   "end_distance_m": 165.0,
   "start_elevation_m": 25.62825822089413,
   "end_elevation_m": 26.571310388944596,
   "min_gradient_pct": -17.8390499802509
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.84796598377831,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 163.0,
   "end_distance_m": 166.0,
   "start_elevation_m": 25.62825822089413,
   "end_elevation_m": 26.763697200407478,
   "min_gradient_pct": -11.399919131659905
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.989966011640234,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 398.0,
   "end_distance_m": 403.0,
   "start_elevation_m": 59.82733462906537,
   "end_elevation_m": 61.32683292964738,
   "min_gradient_pct": -4.9665039431879165
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.612863689422724,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 304.0,
   "end_distance_m": 314.0,
   "start_elevation_m": 45.05296306893811,
   "end_elevation_m": 47.314249437880385,
   "min_gradient_pct": -1.0101805613722803
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.273365481425216,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 301.0,
   "end_distance_m": 321.0,
   "start_elevation_m": 44.561413249401475,
   "end_elevation_m": 48.61608634568652,
   "min_gradient_pct": 0.49585795871934124
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.16843015691049,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 378.0,
   "end_distance_m": 403.0,
   "start_elevation_m": 56.28472539041976,
   "end_elevation_m": 61.32683292964738,
   "min_gradient_pct": 0.914120776945083
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.2291735196315,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 353.0,
   "end_distance_m": 403.0,
   "start_elevation_m": 52.21224616983163,
   "end_elevation_m": 61.32683292964738,
   "min_gradient_pct": 2.2147651840958815
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.406801920983426,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 303.0,
   "end_distance_m": 403.0,
   "start_elevation_m": 44.920031008663955,
   "end_elevation_m": 61.32683292964738,
   "min_gradient_pct": 3.3179047565871826
  }
 ],
 "shape": {
  "ascent_concentration": 0.408,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 109.0,
  "shape_class": "sustained"
 },
 "length_m": 951.2707917130667,
 "start_elevation_m": 11.527444249334755,
 "end_elevation_m": 100.02475479080302,
 "endpoint_gain_m": 88.49731054146827,
 "overall_gradient_pct": 9.30306189493116,
 "accumulated_ascent_m": 90.18753106139724,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.989966011640234,
   "start_distance_m": 398.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 400.5,
   "start_elevation_m": 59.82733462906537,
   "end_elevation_m": 61.32683292964738,
   "start_xy": [
    450615.54838898696,
    87750.5619877026
   ],
   "end_xy": [
    450619.6907301489,
    87747.76180740523
   ]
  },
  "max_10m": {
   "gradient_pct": 22.612863689422724,
   "start_distance_m": 304.0,
   "end_distance_m": 314.0,
   "midpoint_distance_m": 309.0,
   "start_elevation_m": 45.05296306893811,
   "end_elevation_m": 47.314249437880385,
   "start_xy": [
    450540.3034661532,
    87806.34705821064
   ],
   "end_xy": [
    450547.2710338367,
    87799.17398351594
   ]
  },
  "max_20m": {
   "gradient_pct": 20.273365481425216,
   "start_distance_m": 301.0,
   "end_distance_m": 321.0,
   "midpoint_distance_m": 311.0,
   "start_elevation_m": 44.561413249401475,
   "end_elevation_m": 48.61608634568652,
   "start_xy": [
    450538.21319584816,
    87808.49898061904
   ],
   "end_xy": [
    450552.1483312152,
    87794.15283122966
   ]
  },
  "max_25m": {
   "gradient_pct": 20.16843015691049,
   "start_distance_m": 378.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 390.5,
   "start_elevation_m": 56.28472539041976,
   "end_elevation_m": 61.32683292964738,
   "start_xy": [
    450598.97902433906,
    87761.76270889213
   ],
   "end_xy": [
    450619.6907301489,
    87747.76180740523
   ]
  },
  "max_50m": {
   "gradient_pct": 18.2291735196315,
   "start_distance_m": 353.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 378.0,
   "start_elevation_m": 52.21224616983163,
   "end_elevation_m": 61.32683292964738,
   "start_xy": [
    450578.2673185292,
    87775.76361037903
   ],
   "end_xy": [
    450619.6907301489,
    87747.76180740523
   ]
  },
  "max_100m": {
   "gradient_pct": 16.406801920983426,
   "start_distance_m": 303.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 353.0,
   "start_elevation_m": 44.920031008663955,
   "end_elevation_m": 61.32683292964738,
   "start_xy": [
    450539.6067093848,
    87807.0643656801
   ],
   "end_xy": [
    450619.6907301489,
    87747.76180740523
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.9665039431879165,
   "start_distance_m": 150.0,
   "end_distance_m": 155.0,
   "midpoint_distance_m": 152.5,
   "start_elevation_m": 25.338059892942802,
   "end_elevation_m": 25.089734695783406,
   "start_xy": [
    450467.7114438928,
    87938.58902163598
   ],
   "end_xy": [
    450468.4703716381,
    87933.64695438862
   ]
  },
  "min_10m": {
   "gradient_pct": -1.0101805613722803,
   "start_distance_m": 150.0,
   "end_distance_m": 160.0,
   "midpoint_distance_m": 155.0,
   "start_elevation_m": 25.338059892942802,
   "end_elevation_m": 25.237041836805574,
   "start_xy": [
    450467.7114438928,
    87938.58902163598
   ],
   "end_xy": [
    450469.2292993833,
    87928.70488714126
   ]
  },
  "min_20m": {
   "gradient_pct": 0.49585795871934124,
   "start_distance_m": 931.0,
   "end_distance_m": 951.0,
   "midpoint_distance_m": 941.0,
   "start_elevation_m": 99.9395938610599,
   "end_elevation_m": 100.03876545280377,
   "start_xy": [
    450980.37580237776,
    87368.53346033323
   ],
   "end_xy": [
    450994.5964461463,
    87354.4713807213
   ]
  },
  "min_25m": {
   "gradient_pct": 0.914120776945083,
   "start_distance_m": 926.0,
   "end_distance_m": 951.0,
   "midpoint_distance_m": 938.5,
   "start_elevation_m": 99.8102352585675,
   "end_elevation_m": 100.03876545280377,
   "start_xy": [
    450976.87272917834,
    87372.1011596142
   ],
   "end_xy": [
    450994.5964461463,
    87354.4713807213
   ]
  },
  "min_50m": {
   "gradient_pct": 2.2147651840958815,
   "start_distance_m": 901.0,
   "end_distance_m": 951.0,
   "midpoint_distance_m": 926.0,
   "start_elevation_m": 98.93138286075583,
   "end_elevation_m": 100.03876545280377,
   "start_xy": [
    450959.35736318125,
    87389.93965601911
   ],
   "end_xy": [
    450994.5964461463,
    87354.4713807213
   ]
  },
  "min_100m": {
   "gradient_pct": 3.3179047565871826,
   "start_distance_m": 851.0,
   "end_distance_m": 951.0,
   "midpoint_distance_m": 901.0,
   "start_elevation_m": 96.72086069621659,
   "end_elevation_m": 100.03876545280377,
   "start_xy": [
    450929.337026883,
    87429.76012149687
   ],
   "end_xy": [
    450994.5964461463,
    87354.4713807213
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 47.15260840252338,
   "start_distance_m": 163.0,
   "end_distance_m": 165.0,
   "midpoint_distance_m": 164.0,
   "start_elevation_m": 25.62825822089413,
   "end_elevation_m": 26.571310388944596,
   "start_xy": [
    450469.68465603044,
    87925.73964679283
   ],
   "end_xy": [
    450469.9882271285,
    87923.76281989388
   ]
  },
  "max_3m": {
   "gradient_pct": 37.84796598377831,
   "start_distance_m": 163.0,
   "end_distance_m": 166.0,
   "midpoint_distance_m": 164.5,
   "start_elevation_m": 25.62825822089413,
   "end_elevation_m": 26.763697200407478,
   "start_xy": [
    450469.68465603044,
    87925.73964679283
   ],
   "end_xy": [
    450470.1400126776,
    87922.77440644441
   ]
  }
 },
 "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": 0.051,
   "obstruction_max_height_m": 8.92,
   "flagged_windows_m": [
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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/SZ5085.tif"
  ],
  "calculated_at": "2026-09-05T01:30:18+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-03.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": [
   "SZ5085.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Newport",
  "county": "Isle of Wight"
 }
}