{
 "ocl_version": "0.1.0",
 "name": "Barn Hill",
 "slug": "barn-hill-3",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 49.12255127626031,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 38.0,
   "end_distance_m": 40.0,
   "start_elevation_m": 9.917295996148011,
   "end_elevation_m": 10.899747021673218,
   "min_gradient_pct": -36.53161229778199,
   "suppressed_max_gradient_pct": 82.60494905531868,
   "suppressed_location_m": [
    88.0,
    90.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 47.81093900057669,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 38.0,
   "end_distance_m": 41.0,
   "start_elevation_m": 9.917295996148011,
   "end_elevation_m": 11.351624166165312,
   "min_gradient_pct": -27.54547422230355,
   "suppressed_max_gradient_pct": 78.37825824648839,
   "suppressed_location_m": [
    88.0,
    91.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 40.81283947264364,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 37.0,
   "end_distance_m": 42.0,
   "start_elevation_m": 9.601773604020956,
   "end_elevation_m": 11.642415577653138,
   "min_gradient_pct": -15.178012645030137,
   "suppressed_max_gradient_pct": 74.10148921294763,
   "suppressed_location_m": [
    88.0,
    93.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.56649814287404,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 36.0,
   "end_distance_m": 46.0,
   "start_elevation_m": 9.559984559759855,
   "end_elevation_m": 12.116634374047258,
   "min_gradient_pct": -4.718458289929437,
   "suppressed_max_gradient_pct": 50.5226861045864,
   "suppressed_location_m": [
    83.0,
    93.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.469913247318836,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 223.0,
   "end_distance_m": 243.0,
   "start_elevation_m": 32.328483384522684,
   "end_elevation_m": 36.82246603398645,
   "min_gradient_pct": -0.5137974623100128,
   "suppressed_max_gradient_pct": 29.78386056773285,
   "suppressed_location_m": [
    84.0,
    104.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.71681449152541,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 217.0,
   "end_distance_m": 242.0,
   "start_elevation_m": 31.21082078080032,
   "end_elevation_m": 36.64002440368167,
   "min_gradient_pct": 0.9587682987799155,
   "suppressed_max_gradient_pct": 26.4407214784398,
   "suppressed_location_m": [
    85.0,
    110.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.22864203330569,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 216.0,
   "end_distance_m": 266.0,
   "start_elevation_m": 30.98304812453555,
   "end_elevation_m": 40.097369141188395,
   "min_gradient_pct": 1.391892299619073
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.307225886570606,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 210.0,
   "end_distance_m": 310.0,
   "start_elevation_m": 29.841258648222052,
   "end_elevation_m": 47.14848453479266,
   "min_gradient_pct": 2.558042172718551
  }
 ],
 "shape": {
  "ascent_concentration": 0.393,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 65.0,
  "shape_class": "sustained"
 },
 "length_m": 586.0293734838073,
 "start_elevation_m": 5.1489060781478715,
 "end_elevation_m": 59.972897193065165,
 "endpoint_gain_m": 54.82399111491729,
 "overall_gradient_pct": 9.355160951916371,
 "accumulated_ascent_m": 57.14329963669179,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 40.81283947264364,
   "start_distance_m": 37.0,
   "end_distance_m": 42.0,
   "midpoint_distance_m": 39.5,
   "start_elevation_m": 9.601773604020956,
   "end_elevation_m": 11.642415577653138,
   "start_xy": [
    172189.36110557496,
    14577.021146872035
   ],
   "end_xy": [
    172186.71333750506,
    14581.262529223111
   ]
  },
  "max_10m": {
   "gradient_pct": 25.56649814287404,
   "start_distance_m": 36.0,
   "end_distance_m": 46.0,
   "midpoint_distance_m": 41.0,
   "start_elevation_m": 9.559984559759855,
   "end_elevation_m": 12.116634374047258,
   "start_xy": [
    172189.40587466824,
    14576.039046436737
   ],
   "end_xy": [
    172184.40817681878,
    14584.527535603953
   ]
  },
  "max_20m": {
   "gradient_pct": 22.469913247318836,
   "start_distance_m": 223.0,
   "end_distance_m": 243.0,
   "midpoint_distance_m": 233.0,
   "start_elevation_m": 32.328483384522684,
   "end_elevation_m": 36.82246603398645,
   "start_xy": [
    172167.19714348853,
    14752.166542823976
   ],
   "end_xy": [
    172164.82729128242,
    14772.025641507476
   ]
  },
  "max_25m": {
   "gradient_pct": 21.71681449152541,
   "start_distance_m": 217.0,
   "end_distance_m": 242.0,
   "midpoint_distance_m": 229.5,
   "start_elevation_m": 31.21082078080032,
   "end_elevation_m": 36.64002440368167,
   "start_xy": [
    172167.9080991504,
    14746.208813218926
   ],
   "end_xy": [
    172164.9457838927,
    14771.032686573302
   ]
  },
  "max_50m": {
   "gradient_pct": 18.22864203330569,
   "start_distance_m": 216.0,
   "end_distance_m": 266.0,
   "midpoint_distance_m": 241.0,
   "start_elevation_m": 30.98304812453555,
   "end_elevation_m": 40.097369141188395,
   "start_xy": [
    172168.0265917607,
    14745.21585828475
   ],
   "end_xy": [
    172162.6467593694,
    14794.912090719812
   ]
  },
  "max_100m": {
   "gradient_pct": 17.307225886570606,
   "start_distance_m": 210.0,
   "end_distance_m": 310.0,
   "midpoint_distance_m": 260.0,
   "start_elevation_m": 29.841258648222052,
   "end_elevation_m": 47.14848453479266,
   "start_xy": [
    172168.73754742253,
    14739.2581286797
   ],
   "end_xy": [
    172166.5062274131,
    14838.675640344378
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -15.178012645030137,
   "start_distance_m": 93.0,
   "end_distance_m": 98.0,
   "midpoint_distance_m": 95.5,
   "start_elevation_m": 20.211819910912354,
   "end_elevation_m": 19.452919278660847,
   "start_xy": [
    172159.61909781912,
    14624.30762758659
   ],
   "end_xy": [
    172157.80083685767,
    14628.965301585065
   ]
  },
  "min_10m": {
   "gradient_pct": -4.718458289929437,
   "start_distance_m": 133.0,
   "end_distance_m": 143.0,
   "midpoint_distance_m": 138.0,
   "start_elevation_m": 24.073797666972116,
   "end_elevation_m": 23.601951837979172,
   "start_xy": [
    172158.25001139962,
    14663.561750633968
   ],
   "end_xy": [
    172160.00737765394,
    14673.405177242828
   ]
  },
  "min_20m": {
   "gradient_pct": -0.5137974623100128,
   "start_distance_m": 133.0,
   "end_distance_m": 153.0,
   "midpoint_distance_m": 143.0,
   "start_elevation_m": 24.073797666972116,
   "end_elevation_m": 23.971038174510113,
   "start_xy": [
    172158.25001139962,
    14663.561750633968
   ],
   "end_xy": [
    172162.13853627472,
    14683.17544658062
   ]
  },
  "min_25m": {
   "gradient_pct": 0.9587682987799155,
   "start_distance_m": 477.0,
   "end_distance_m": 502.0,
   "midpoint_distance_m": 489.5,
   "start_elevation_m": 57.11682286827428,
   "end_elevation_m": 57.356514942969255,
   "start_xy": [
    172111.75499662795,
    14991.494959209986
   ],
   "end_xy": [
    172090.9552555786,
    15005.15966219713
   ]
  },
  "min_50m": {
   "gradient_pct": 1.391892299619073,
   "start_distance_m": 466.0,
   "end_distance_m": 516.0,
   "midpoint_distance_m": 491.0,
   "start_elevation_m": 57.00231035985545,
   "end_elevation_m": 57.698256509664986,
   "start_xy": [
    172117.64294239678,
    14982.540531237755
   ],
   "end_xy": [
    172077.9385122828,
    15010.313727968101
   ]
  },
  "min_100m": {
   "gradient_pct": 2.558042172718551,
   "start_distance_m": 466.0,
   "end_distance_m": 566.0,
   "midpoint_distance_m": 516.0,
   "start_elevation_m": 57.00231035985545,
   "end_elevation_m": 59.560352532574,
   "start_xy": [
    172117.64294239678,
    14982.540531237755
   ],
   "end_xy": [
    172032.9028347447,
    15031.973635869856
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 49.12255127626031,
   "start_distance_m": 38.0,
   "end_distance_m": 40.0,
   "midpoint_distance_m": 39.0,
   "start_elevation_m": 9.917295996148011,
   "end_elevation_m": 10.899747021673218,
   "start_xy": [
    172188.831551961,
    14577.86942334225
   ],
   "end_xy": [
    172187.77244473304,
    14579.565976282682
   ]
  },
  "max_3m": {
   "gradient_pct": 47.81093900057669,
   "start_distance_m": 38.0,
   "end_distance_m": 41.0,
   "midpoint_distance_m": 39.5,
   "start_elevation_m": 9.917295996148011,
   "end_elevation_m": 11.351624166165312,
   "start_xy": [
    172188.831551961,
    14577.86942334225
   ],
   "end_xy": [
    172187.24289111904,
    14580.414252752897
   ]
  }
 },
 "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": 0.017,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.245,
   "obstruction_max_height_m": 11.46,
   "flagged_windows_m": [
    2,
    3,
    5,
    10
   ]
  },
  "excluded_ranges_m": [
   [
    86.0,
    95.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "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/SW7010.tif",
   "data/cache/england/bulk_dtm_1m/SW7015.tif"
  ],
  "calculated_at": "2026-09-05T01:31:53+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-10.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": [
   "SW7010.tif",
   "SW7015.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cadgwith",
  "county": "Cornwall"
 }
}