{
 "ocl_version": "0.1.0",
 "name": "Doverhay",
 "slug": "doverhay",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.69861481215224,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 380.0,
   "end_distance_m": 382.0,
   "start_elevation_m": 70.11011960038408,
   "end_elevation_m": 70.88409189662713,
   "min_gradient_pct": -38.95266353203937
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.07125334179015,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 503.0,
   "end_distance_m": 506.0,
   "start_elevation_m": 86.05479363726523,
   "end_elevation_m": 87.19693123751894,
   "min_gradient_pct": -38.80633811013183
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 37.788946708727735,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 501.0,
   "end_distance_m": 506.0,
   "start_elevation_m": 85.30748390208255,
   "end_elevation_m": 87.19693123751894,
   "min_gradient_pct": -38.18860891119954
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 33.944722016757964,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 496.0,
   "end_distance_m": 506.0,
   "start_elevation_m": 83.80245903584314,
   "end_elevation_m": 87.19693123751894,
   "min_gradient_pct": -31.252451155774565
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 28.237812183260473,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 489.0,
   "end_distance_m": 509.0,
   "start_elevation_m": 82.00474669097022,
   "end_elevation_m": 87.65230912762232,
   "min_gradient_pct": -17.44225027471046
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 26.70774535652794,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 490.0,
   "end_distance_m": 515.0,
   "start_elevation_m": 82.14341441850577,
   "end_elevation_m": 88.82035075763775,
   "min_gradient_pct": -13.043886640324047
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.848738358854433,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 335.0,
   "end_distance_m": 385.0,
   "start_elevation_m": 60.57099522225208,
   "end_elevation_m": 71.9953644016793,
   "min_gradient_pct": -7.970807242850952
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.33171253815835,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 339.0,
   "end_distance_m": 439.0,
   "start_elevation_m": 61.32294043192562,
   "end_elevation_m": 82.65465297008397,
   "min_gradient_pct": 1.054203825512488
  }
 ],
 "shape": {
  "ascent_concentration": 0.334,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 261.0,
  "shape_class": "sustained"
 },
 "length_m": 2355.8635547703757,
 "start_elevation_m": 38.681684551480764,
 "end_elevation_m": 278.09161574043355,
 "endpoint_gain_m": 239.40993118895278,
 "overall_gradient_pct": 10.162300388924175,
 "accumulated_ascent_m": 249.55417214131958,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 37.788946708727735,
   "start_distance_m": 501.0,
   "end_distance_m": 506.0,
   "midpoint_distance_m": 503.5,
   "start_elevation_m": 85.30748390208255,
   "end_elevation_m": 87.19693123751894,
   "start_xy": [
    288961.7868590933,
    146285.79523781347
   ],
   "end_xy": [
    288957.6780779205,
    146282.99449998297
   ]
  },
  "max_10m": {
   "gradient_pct": 33.944722016757964,
   "start_distance_m": 496.0,
   "end_distance_m": 506.0,
   "midpoint_distance_m": 501.0,
   "start_elevation_m": 83.80245903584314,
   "end_elevation_m": 87.19693123751894,
   "start_xy": [
    288966.0297257121,
    146288.44062679345
   ],
   "end_xy": [
    288957.6780779205,
    146282.99449998297
   ]
  },
  "max_20m": {
   "gradient_pct": 28.237812183260473,
   "start_distance_m": 489.0,
   "end_distance_m": 509.0,
   "midpoint_distance_m": 499.0,
   "start_elevation_m": 82.00474669097022,
   "end_elevation_m": 87.65230912762232,
   "start_xy": [
    288969.86210748303,
    146293.25370878808
   ],
   "end_xy": [
    288958.7950927893,
    146280.40705928538
   ]
  },
  "max_25m": {
   "gradient_pct": 26.70774535652794,
   "start_distance_m": 490.0,
   "end_distance_m": 515.0,
   "midpoint_distance_m": 502.5,
   "start_elevation_m": 82.14341441850577,
   "end_elevation_m": 88.82035075763775,
   "start_xy": [
    288970.0837761814,
    146292.2785867505
   ],
   "end_xy": [
    288961.71379435534,
    146275.1648096568
   ]
  },
  "max_50m": {
   "gradient_pct": 22.848738358854433,
   "start_distance_m": 335.0,
   "end_distance_m": 385.0,
   "midpoint_distance_m": 360.0,
   "start_elevation_m": 60.57099522225208,
   "end_elevation_m": 71.9953644016793,
   "start_xy": [
    288874.21735059697,
    146393.34665290554
   ],
   "end_xy": [
    288903.36113866034,
    146352.7638469395
   ]
  },
  "max_100m": {
   "gradient_pct": 21.33171253815835,
   "start_distance_m": 339.0,
   "end_distance_m": 439.0,
   "midpoint_distance_m": 389.0,
   "start_elevation_m": 61.32294043192562,
   "end_elevation_m": 82.65465297008397,
   "start_xy": [
    288876.5146384508,
    146390.07290967662
   ],
   "end_xy": [
    288938.7735972051,
    146317.87046128637
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -38.18860891119954,
   "start_distance_m": 444.0,
   "end_distance_m": 449.0,
   "midpoint_distance_m": 446.5,
   "start_elevation_m": 82.5811597794779,
   "end_elevation_m": 80.67172933391792,
   "start_xy": [
    288942.8782204224,
    146317.99399306497
   ],
   "end_xy": [
    288947.48946849693,
    146319.92696776622
   ]
  },
  "min_10m": {
   "gradient_pct": -31.252451155774565,
   "start_distance_m": 443.0,
   "end_distance_m": 453.0,
   "midpoint_distance_m": 448.0,
   "start_elevation_m": 82.88474682461637,
   "end_elevation_m": 79.75950170903891,
   "start_xy": [
    288941.9559708075,
    146317.60739812473
   ],
   "end_xy": [
    288951.1784669565,
    146321.4733475272
   ]
  },
  "min_20m": {
   "gradient_pct": -17.44225027471046,
   "start_distance_m": 441.0,
   "end_distance_m": 461.0,
   "midpoint_distance_m": 451.0,
   "start_elevation_m": 82.99648488233035,
   "end_elevation_m": 79.50803482738826,
   "start_xy": [
    288940.1114715778,
    146316.83420824425
   ],
   "end_xy": [
    288957.1358549185,
    146317.9891719495
   ]
  },
  "min_25m": {
   "gradient_pct": -13.043886640324047,
   "start_distance_m": 441.0,
   "end_distance_m": 466.0,
   "midpoint_distance_m": 453.5,
   "start_elevation_m": 82.99648488233035,
   "end_elevation_m": 79.73551322224934,
   "start_xy": [
    288940.1114715778,
    146316.83420824425
   ],
   "end_xy": [
    288959.80848661024,
    146313.76341286497
   ]
  },
  "min_50m": {
   "gradient_pct": -7.970807242850952,
   "start_distance_m": 884.0,
   "end_distance_m": 934.0,
   "midpoint_distance_m": 909.0,
   "start_elevation_m": 114.79656868766772,
   "end_elevation_m": 110.81116506624224,
   "start_xy": [
    289289.29690340935,
    146128.3477687783
   ],
   "end_xy": [
    289336.6491757154,
    146116.82768734006
   ]
  },
  "min_100m": {
   "gradient_pct": 1.054203825512488,
   "start_distance_m": 844.0,
   "end_distance_m": 944.0,
   "midpoint_distance_m": 894.0,
   "start_elevation_m": 110.71633093730063,
   "end_elevation_m": 111.77053476281311,
   "start_xy": [
    289250.3019406579,
    146136.95622396507
   ],
   "end_xy": [
    289332.84063276683,
    146109.46127386947
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.69861481215224,
   "start_distance_m": 380.0,
   "end_distance_m": 382.0,
   "midpoint_distance_m": 381.0,
   "start_elevation_m": 70.11011960038408,
   "end_elevation_m": 70.88409189662713,
   "start_xy": [
    288900.2776397804,
    146356.69983914698
   ],
   "end_xy": [
    288901.51103933237,
    146355.125442264
   ]
  },
  "max_3m": {
   "gradient_pct": 38.07125334179015,
   "start_distance_m": 503.0,
   "end_distance_m": 506.0,
   "midpoint_distance_m": 504.5,
   "start_elevation_m": 86.05479363726523,
   "end_elevation_m": 87.19693123751894,
   "start_xy": [
    288960.0897124458,
    146284.7370822215
   ],
   "end_xy": [
    288957.6780779205,
    146282.99449998297
   ]
  }
 },
 "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": 0.102,
   "obstruction_max_height_m": 22.07,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50
   ]
  },
  "review": [],
  "extent": [
   "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/SS8545.tif"
  ],
  "calculated_at": "2026-09-04T04:19:12+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-27.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "ukbench-260904",
  "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": [
   "SS8545.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Porlock",
  "county": "Somerset"
 }
}