{
 "ocl_version": "0.1.0",
 "name": "Kingdom Road",
 "slug": "kingdom-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 39.02267697110062,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 2232.0,
   "end_distance_m": 2234.0,
   "start_elevation_m": 463.5872707408413,
   "end_elevation_m": 464.3677242802633,
   "min_gradient_pct": -47.85153223962482,
   "suppressed_max_gradient_pct": 76.6079349264885,
   "suppressed_location_m": [
    1391.0,
    1393.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.44164834294285,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 2231.0,
   "end_distance_m": 2234.0,
   "start_elevation_m": 463.214474829975,
   "end_elevation_m": 464.3677242802633,
   "min_gradient_pct": -44.855377618659986,
   "suppressed_max_gradient_pct": 67.99277492604385,
   "suppressed_location_m": [
    1390.0,
    1393.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 37.60920449001219,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 2230.0,
   "end_distance_m": 2235.0,
   "start_elevation_m": 462.8564215683263,
   "end_elevation_m": 464.7368817928269,
   "min_gradient_pct": -33.94434942310909,
   "suppressed_max_gradient_pct": 47.80180085166194,
   "suppressed_location_m": [
    1390.0,
    1395.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 36.34232549637716,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2229.0,
   "end_distance_m": 2239.0,
   "start_elevation_m": 462.52092139084345,
   "end_elevation_m": 466.15515394048117,
   "min_gradient_pct": -32.95016587042028
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 32.083970297821054,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2228.0,
   "end_distance_m": 2248.0,
   "start_elevation_m": 462.2214629034146,
   "end_elevation_m": 468.6382569629788,
   "min_gradient_pct": -28.70880615260006
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 31.360046959865713,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2227.0,
   "end_distance_m": 2252.0,
   "start_elevation_m": 461.9403971250066,
   "end_elevation_m": 469.780408864973,
   "min_gradient_pct": -28.385211952213922
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 29.72479622592232,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2225.0,
   "end_distance_m": 2275.0,
   "start_elevation_m": 461.444471772622,
   "end_elevation_m": 476.3068698855832,
   "min_gradient_pct": -19.561677614344262
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 25.54489157489451,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2180.0,
   "end_distance_m": 2280.0,
   "start_elevation_m": 451.8122138648435,
   "end_elevation_m": 477.357105439738,
   "min_gradient_pct": -13.318019251669625
  }
 ],
 "shape": {
  "ascent_concentration": 0.333,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 192.0,
  "shape_class": "sustained"
 },
 "length_m": 2416.7641393614776,
 "start_elevation_m": 261.2429270507713,
 "end_elevation_m": 469.1326145446858,
 "endpoint_gain_m": 207.8896874939145,
 "overall_gradient_pct": 8.601984947891527,
 "accumulated_ascent_m": 233.763085698326,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 37.60920449001219,
   "start_distance_m": 2230.0,
   "end_distance_m": 2235.0,
   "midpoint_distance_m": 2232.5,
   "start_elevation_m": 462.8564215683263,
   "end_elevation_m": 464.7368817928269,
   "start_xy": [
    716847.9351278223,
    4869900.01634132
   ],
   "end_xy": [
    716843.2839154657,
    4869901.851068442
   ]
  },
  "max_10m": {
   "gradient_pct": 36.34232549637716,
   "start_distance_m": 2229.0,
   "end_distance_m": 2239.0,
   "midpoint_distance_m": 2234.0,
   "start_elevation_m": 462.52092139084345,
   "end_elevation_m": 466.15515394048117,
   "start_xy": [
    716848.8653702937,
    4869899.649395895
   ],
   "end_xy": [
    716839.5629455803,
    4869903.31885014
   ]
  },
  "max_20m": {
   "gradient_pct": 32.083970297821054,
   "start_distance_m": 2228.0,
   "end_distance_m": 2248.0,
   "midpoint_distance_m": 2238.0,
   "start_elevation_m": 462.2214629034146,
   "end_elevation_m": 468.6382569629788,
   "start_xy": [
    716849.795612765,
    4869899.282450471
   ],
   "end_xy": [
    716831.1907633384,
    4869906.62135896
   ]
  },
  "max_25m": {
   "gradient_pct": 31.360046959865713,
   "start_distance_m": 2227.0,
   "end_distance_m": 2252.0,
   "midpoint_distance_m": 2239.5,
   "start_elevation_m": 461.9403971250066,
   "end_elevation_m": 469.780408864973,
   "start_xy": [
    716850.7258552364,
    4869898.915505047
   ],
   "end_xy": [
    716827.4697934531,
    4869908.089140658
   ]
  },
  "max_50m": {
   "gradient_pct": 29.72479622592232,
   "start_distance_m": 2225.0,
   "end_distance_m": 2275.0,
   "midpoint_distance_m": 2250.0,
   "start_elevation_m": 461.444471772622,
   "end_elevation_m": 476.3068698855832,
   "start_xy": [
    716852.5863401791,
    4869898.181614198
   ],
   "end_xy": [
    716806.4109793562,
    4869917.307666387
   ]
  },
  "max_100m": {
   "gradient_pct": 25.54489157489451,
   "start_distance_m": 2180.0,
   "end_distance_m": 2280.0,
   "midpoint_distance_m": 2230.0,
   "start_elevation_m": 451.8122138648435,
   "end_elevation_m": 477.357105439738,
   "start_xy": [
    716894.4472513889,
    4869881.669070097
   ],
   "end_xy": [
    716801.888412113,
    4869919.439891875
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -33.94434942310909,
   "start_distance_m": 2396.0,
   "end_distance_m": 2401.0,
   "midpoint_distance_m": 2398.5,
   "start_elevation_m": 473.1119903730228,
   "end_elevation_m": 471.41477290186737,
   "start_xy": [
    716691.7554213376,
    4869944.478689232
   ],
   "end_xy": [
    716686.7623366311,
    4869944.215810715
   ]
  },
  "min_10m": {
   "gradient_pct": -32.95016587042028,
   "start_distance_m": 2396.0,
   "end_distance_m": 2406.0,
   "midpoint_distance_m": 2401.0,
   "start_elevation_m": 473.1119903730228,
   "end_elevation_m": 469.8169737859808,
   "start_xy": [
    716691.7554213376,
    4869944.478689232
   ],
   "end_xy": [
    716681.7692519247,
    4869943.9529321985
   ]
  },
  "min_20m": {
   "gradient_pct": -28.70880615260006,
   "start_distance_m": 2386.0,
   "end_distance_m": 2406.0,
   "midpoint_distance_m": 2396.0,
   "start_elevation_m": 475.5587350165008,
   "end_elevation_m": 469.8169737859808,
   "start_xy": [
    716701.7205105209,
    4869945.307301104
   ],
   "end_xy": [
    716681.7692519247,
    4869943.9529321985
   ]
  },
  "min_25m": {
   "gradient_pct": -28.385211952213922,
   "start_distance_m": 2381.0,
   "end_distance_m": 2406.0,
   "midpoint_distance_m": 2393.5,
   "start_elevation_m": 476.9132767740343,
   "end_elevation_m": 469.8169737859808,
   "start_xy": [
    716706.7018657676,
    4869945.738694088
   ],
   "end_xy": [
    716681.7692519247,
    4869943.9529321985
   ]
  },
  "min_50m": {
   "gradient_pct": -19.561677614344262,
   "start_distance_m": 2357.0,
   "end_distance_m": 2407.0,
   "midpoint_distance_m": 2382.0,
   "start_elevation_m": 479.44852557492493,
   "end_elevation_m": 469.6676867677528,
   "start_xy": [
    716730.5894833354,
    4869947.4711233005
   ],
   "end_xy": [
    716680.7706349834,
    4869943.900356495
   ]
  },
  "min_100m": {
   "gradient_pct": -13.318019251669625,
   "start_distance_m": 2316.0,
   "end_distance_m": 2416.0,
   "midpoint_distance_m": 2366.0,
   "start_elevation_m": 482.54140611434184,
   "end_elevation_m": 469.2233868626722,
   "start_xy": [
    716769.3259279615,
    4869934.791915386
   ],
   "end_xy": [
    716671.7830825119,
    4869943.427175164
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 39.02267697110062,
   "start_distance_m": 2232.0,
   "end_distance_m": 2234.0,
   "midpoint_distance_m": 2233.0,
   "start_elevation_m": 463.5872707408413,
   "end_elevation_m": 464.3677242802633,
   "start_xy": [
    716846.0746428797,
    4869900.7502321685
   ],
   "end_xy": [
    716844.2141579371,
    4869901.484123018
   ]
  },
  "max_3m": {
   "gradient_pct": 38.44164834294285,
   "start_distance_m": 2231.0,
   "end_distance_m": 2234.0,
   "midpoint_distance_m": 2232.5,
   "start_elevation_m": 463.214474829975,
   "end_elevation_m": 464.3677242802633,
   "start_xy": [
    716847.004885351,
    4869900.383286744
   ],
   "end_xy": [
    716844.2141579371,
    4869901.484123018
   ]
  }
 },
 "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": 0.783,
   "obstruction_max_height_m": 28.66,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.003,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.158,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    520.0,
    580.0
   ],
   [
    590.0,
    640.0
   ],
   [
    670.0,
    820.0
   ],
   [
    830.0,
    870.0
   ],
   [
    930.0,
    1000.0
   ],
   [
    1389.0,
    1395.0
   ]
  ],
  "review": [],
  "extent": [
   "descends_at_end"
  ],
  "suggested_summit_cut_m": 2325.0,
  "trailing_descent_m": 13.8
 },
 "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/vt/USGS_1M_18_x71y487_VT_Statewide_A23.tif",
   "data/cache/usa/vt/USGS_1M_18_x71y488_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T20:33:34+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/vermont-260821.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-vt-1-260824",
  "elevation_provider": "USGS 3DEP (The National Map)",
  "elevation_licence": "Public domain \u2014 USGS 3DEP 1 m DEM, courtesy of the U.S. Geological Survey",
  "elevation_dataset": "USGS 3DEP 1 m DEM, VT_Statewide_A23 (collected 2023)",
  "elevation_tile_ids": [
   "x71y487",
   "x71y488"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 20.6% over 200 m (Terrain 50), gain 208.1 m over 2417 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). ADOPTED (NE wave 1, 2026-08-25): qualified-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/VT_Statewide_2_A23",
   "ept_crs": "EPSG:3857",
   "station_coverage": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Vershire",
  "county": "Vermont"
 }
}