{
 "ocl_version": "0.1.0",
 "name": "Steep Way Road",
 "slug": "steep-way-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.44681581336306,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1035.0,
   "end_distance_m": 1037.0,
   "start_elevation_m": 302.3017178526152,
   "end_elevation_m": 302.91065416888244,
   "min_gradient_pct": -24.92346160785246
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.928777628418782,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1035.0,
   "end_distance_m": 1038.0,
   "start_elevation_m": 302.3017178526152,
   "end_elevation_m": 303.13958118146775,
   "min_gradient_pct": -19.718539629921377
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.59286295456627,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 342.0,
   "end_distance_m": 347.0,
   "start_elevation_m": 201.97389936817984,
   "end_elevation_m": 203.15354251590816,
   "min_gradient_pct": -11.892827189495847
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.095207110951606,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 338.0,
   "end_distance_m": 348.0,
   "start_elevation_m": 201.07749794290874,
   "end_elevation_m": 203.3870186540039,
   "min_gradient_pct": -7.097681687051818
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.429800340427306,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 335.0,
   "end_distance_m": 355.0,
   "start_elevation_m": 200.43432778995654,
   "end_elevation_m": 204.920287858042,
   "min_gradient_pct": -4.833637813495102
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.098161327436628,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 331.0,
   "end_distance_m": 356.0,
   "start_elevation_m": 199.60176167131357,
   "end_elevation_m": 205.12630200317273,
   "min_gradient_pct": -3.3600298563014803
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.487432629052083,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 324.0,
   "end_distance_m": 374.0,
   "start_elevation_m": 198.33083143867142,
   "end_elevation_m": 208.57454775319746,
   "min_gradient_pct": -1.2858085197376568
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.13910207283024,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 330.0,
   "end_distance_m": 430.0,
   "start_elevation_m": 199.40282670820142,
   "end_elevation_m": 218.54192878103166,
   "min_gradient_pct": 1.0740439662414474
  }
 ],
 "shape": {
  "ascent_concentration": 0.368,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 695.0,
  "shape_class": "sustained"
 },
 "length_m": 1685.251075324852,
 "start_elevation_m": 169.55922444267557,
 "end_elevation_m": 346.5540268898334,
 "endpoint_gain_m": 176.9948024471578,
 "overall_gradient_pct": 10.502577630044827,
 "accumulated_ascent_m": 182.13124860650854,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.59286295456627,
   "start_distance_m": 342.0,
   "end_distance_m": 347.0,
   "midpoint_distance_m": 344.5,
   "start_elevation_m": 201.97389936817984,
   "end_elevation_m": 203.15354251590816,
   "start_xy": [
    690365.8466469663,
    4761071.566429251
   ],
   "end_xy": [
    690361.0924117498,
    4761070.018124531
   ]
  },
  "max_10m": {
   "gradient_pct": 23.095207110951606,
   "start_distance_m": 338.0,
   "end_distance_m": 348.0,
   "midpoint_distance_m": 343.0,
   "start_elevation_m": 201.07749794290874,
   "end_elevation_m": 203.3870186540039,
   "start_xy": [
    690369.6500351396,
    4761072.805073027
   ],
   "end_xy": [
    690360.1415647065,
    4761069.708463587
   ]
  },
  "max_20m": {
   "gradient_pct": 22.429800340427306,
   "start_distance_m": 335.0,
   "end_distance_m": 355.0,
   "midpoint_distance_m": 345.0,
   "start_elevation_m": 200.43432778995654,
   "end_elevation_m": 204.920287858042,
   "start_xy": [
    690372.5025762696,
    4761073.734055858
   ],
   "end_xy": [
    690354.312934471,
    4761065.832515933
   ]
  },
  "max_25m": {
   "gradient_pct": 22.098161327436628,
   "start_distance_m": 331.0,
   "end_distance_m": 356.0,
   "midpoint_distance_m": 343.5,
   "start_elevation_m": 199.60176167131357,
   "end_elevation_m": 205.12630200317273,
   "start_xy": [
    690376.3059644428,
    4761074.972699635
   ],
   "end_xy": [
    690353.4804074838,
    4761065.278531441
   ]
  },
  "max_50m": {
   "gradient_pct": 20.487432629052083,
   "start_distance_m": 324.0,
   "end_distance_m": 374.0,
   "midpoint_distance_m": 349.0,
   "start_elevation_m": 198.33083143867142,
   "end_elevation_m": 208.57454775319746,
   "start_xy": [
    690382.961893746,
    4761077.140326242
   ],
   "end_xy": [
    690343.7371709533,
    4761050.609564173
   ]
  },
  "max_100m": {
   "gradient_pct": 19.13910207283024,
   "start_distance_m": 330.0,
   "end_distance_m": 430.0,
   "midpoint_distance_m": 380.0,
   "start_elevation_m": 199.40282670820142,
   "end_elevation_m": 218.54192878103166,
   "start_xy": [
    690377.2568114861,
    4761075.282360578
   ],
   "end_xy": [
    690330.032586014,
    4760996.555679189
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.892827189495847,
   "start_distance_m": 1307.0,
   "end_distance_m": 1312.0,
   "midpoint_distance_m": 1309.5,
   "start_elevation_m": 311.08485668559115,
   "end_elevation_m": 310.49021532611636,
   "start_xy": [
    689776.2200924652,
    4760521.342933155
   ],
   "end_xy": [
    689771.5286091707,
    4760519.613775991
   ]
  },
  "min_10m": {
   "gradient_pct": -7.097681687051818,
   "start_distance_m": 1304.0,
   "end_distance_m": 1314.0,
   "midpoint_distance_m": 1309.0,
   "start_elevation_m": 311.1714063898943,
   "end_elevation_m": 310.4616382211891,
   "start_xy": [
    689778.9054936846,
    4760522.633672861
   ],
   "end_xy": [
    689769.6520158529,
    4760518.922113125
   ]
  },
  "min_20m": {
   "gradient_pct": -4.833637813495102,
   "start_distance_m": 1302.0,
   "end_distance_m": 1322.0,
   "midpoint_distance_m": 1312.0,
   "start_elevation_m": 311.18049229223175,
   "end_elevation_m": 310.2137647295327,
   "start_xy": [
    689780.5649274406,
    4760523.750041801
   ],
   "end_xy": [
    689762.1456425817,
    4760516.155461663
   ]
  },
  "min_25m": {
   "gradient_pct": -3.3600298563014803,
   "start_distance_m": 1297.0,
   "end_distance_m": 1322.0,
   "midpoint_distance_m": 1309.5,
   "start_elevation_m": 311.0537721936081,
   "end_elevation_m": 310.2137647295327,
   "start_xy": [
    689784.7135118307,
    4760526.54096415
   ],
   "end_xy": [
    689762.1456425817,
    4760516.155461663
   ]
  },
  "min_50m": {
   "gradient_pct": -1.2858085197376568,
   "start_distance_m": 1114.0,
   "end_distance_m": 1164.0,
   "midpoint_distance_m": 1139.0,
   "start_elevation_m": 307.5617248376037,
   "end_elevation_m": 306.9188205777349,
   "start_xy": [
    689936.8541128926,
    4760624.226390556
   ],
   "end_xy": [
    689889.9906479788,
    4760606.817610022
   ]
  },
  "min_100m": {
   "gradient_pct": 1.0740439662414474,
   "start_distance_m": 1114.0,
   "end_distance_m": 1214.0,
   "midpoint_distance_m": 1164.0,
   "start_elevation_m": 307.5617248376037,
   "end_elevation_m": 308.63576880384517,
   "start_xy": [
    689936.8541128926,
    4760624.226390556
   ],
   "end_xy": [
    689848.273637988,
    4760579.789355822
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.44681581336306,
   "start_distance_m": 1035.0,
   "end_distance_m": 1037.0,
   "midpoint_distance_m": 1036.0,
   "start_elevation_m": 302.3017178526152,
   "end_elevation_m": 302.91065416888244,
   "start_xy": [
    690000.7483449385,
    4760669.107977136
   ],
   "end_xy": [
    689999.4288168573,
    4760667.6054912
   ]
  },
  "max_3m": {
   "gradient_pct": 27.928777628418782,
   "start_distance_m": 1035.0,
   "end_distance_m": 1038.0,
   "midpoint_distance_m": 1036.5,
   "start_elevation_m": 302.3017178526152,
   "end_elevation_m": 303.13958118146775,
   "start_xy": [
    690000.7483449385,
    4760669.107977136
   ],
   "end_xy": [
    689998.7192776371,
    4760666.900825256
   ]
  }
 },
 "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": {
  "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/vt/USGS_1M_18_x68y477_VT_Statewide_A23.tif",
   "data/cache/usa/vt/USGS_1M_18_x69y477_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T21:09:18+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": [
   "x68y477",
   "x69y477"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 17.1% over 200 m (Terrain 50), gain 177.2 m over 1685 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). ADOPTED (NE wave 1, 2026-08-25): clean-steep,endurance. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "canopy_check": "unavailable \u2014 EPT corridor failed: VT_Statewide_2_A23: no EPT nodes intersect the corridor; VT_Statewide_1_A23: no EPT nodes intersect the corridor",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Newfane",
  "county": "Vermont"
 }
}