{
 "ocl_version": "0.1.0",
 "name": "Southeast Corners Road",
 "slug": "southeast-corners-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 26.208211474860832,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 557.0,
   "end_distance_m": 559.0,
   "start_elevation_m": 468.501806533062,
   "end_elevation_m": 469.0259707625592,
   "min_gradient_pct": -18.191797913618757
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.872578921737006,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 556.0,
   "end_distance_m": 559.0,
   "start_elevation_m": 468.2497933949071,
   "end_elevation_m": 469.0259707625592,
   "min_gradient_pct": -17.480406108116615
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.897427955391777,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 63.0,
   "end_distance_m": 68.0,
   "start_elevation_m": 394.25445662786274,
   "end_elevation_m": 395.4493280256323,
   "min_gradient_pct": -16.20776093452605
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.71110348413663,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 59.0,
   "end_distance_m": 69.0,
   "start_elevation_m": 393.46451124055636,
   "end_elevation_m": 395.63562158897,
   "min_gradient_pct": -15.061513666714745
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.361877867280782,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 63.0,
   "end_distance_m": 83.0,
   "start_elevation_m": 394.25445662786274,
   "end_elevation_m": 398.3268322013189,
   "min_gradient_pct": -14.208461217643844
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.32253006359383,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 60.0,
   "end_distance_m": 85.0,
   "start_elevation_m": 393.65214536319417,
   "end_elevation_m": 398.7327778790926,
   "min_gradient_pct": -13.867207392203909
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.2453802473392,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 49.0,
   "end_distance_m": 99.0,
   "start_elevation_m": 391.61483635026696,
   "end_elevation_m": 401.23752647393655,
   "min_gradient_pct": -13.700474196933556
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.316869179260948,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 38.0,
   "end_distance_m": 138.0,
   "start_elevation_m": 389.6958702100992,
   "end_elevation_m": 407.01273938936015,
   "min_gradient_pct": -12.988439372176458
  }
 ],
 "shape": {
  "ascent_concentration": 0.344,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 271.0,
  "shape_class": "sustained"
 },
 "length_m": 1750.63864262397,
 "start_elevation_m": 385.22662399366493,
 "end_elevation_m": 558.4485557276761,
 "endpoint_gain_m": 173.22193173401115,
 "overall_gradient_pct": 9.8947851096429,
 "accumulated_ascent_m": 197.20374440906073,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.897427955391777,
   "start_distance_m": 63.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 65.5,
   "start_elevation_m": 394.25445662786274,
   "end_elevation_m": 395.4493280256323,
   "start_xy": [
    648138.2012243912,
    4777437.996884022
   ],
   "end_xy": [
    648141.1576529533,
    4777433.96457325
   ]
  },
  "max_10m": {
   "gradient_pct": 21.71110348413663,
   "start_distance_m": 59.0,
   "end_distance_m": 69.0,
   "midpoint_distance_m": 64.0,
   "start_elevation_m": 393.46451124055636,
   "end_elevation_m": 395.63562158897,
   "start_xy": [
    648135.9326557404,
    4777441.2910560435
   ],
   "end_xy": [
    648141.7489386656,
    4777433.158111096
   ]
  },
  "max_20m": {
   "gradient_pct": 20.361877867280782,
   "start_distance_m": 63.0,
   "end_distance_m": 83.0,
   "midpoint_distance_m": 73.0,
   "start_elevation_m": 394.25445662786274,
   "end_elevation_m": 398.3268322013189,
   "start_xy": [
    648138.2012243912,
    4777437.996884022
   ],
   "end_xy": [
    648150.0269386393,
    4777421.867640936
   ]
  },
  "max_25m": {
   "gradient_pct": 20.32253006359383,
   "start_distance_m": 60.0,
   "end_distance_m": 85.0,
   "midpoint_distance_m": 72.5,
   "start_elevation_m": 393.65214536319417,
   "end_elevation_m": 398.7327778790926,
   "start_xy": [
    648136.4963009892,
    4777440.465039074
   ],
   "end_xy": [
    648151.2095100641,
    4777420.254716627
   ]
  },
  "max_50m": {
   "gradient_pct": 19.2453802473392,
   "start_distance_m": 49.0,
   "end_distance_m": 99.0,
   "midpoint_distance_m": 74.0,
   "start_elevation_m": 391.61483635026696,
   "end_elevation_m": 401.23752647393655,
   "start_xy": [
    648130.2962032524,
    4777449.551225737
   ],
   "end_xy": [
    648159.4875100377,
    4777408.964246467
   ]
  },
  "max_100m": {
   "gradient_pct": 17.316869179260948,
   "start_distance_m": 38.0,
   "end_distance_m": 138.0,
   "midpoint_distance_m": 88.0,
   "start_elevation_m": 389.6958702100992,
   "end_elevation_m": 407.01273938936015,
   "start_xy": [
    648123.4083415627,
    4777458.103384342
   ],
   "end_xy": [
    648186.6396681045,
    4777381.205767334
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -16.20776093452605,
   "start_distance_m": 1561.0,
   "end_distance_m": 1566.0,
   "midpoint_distance_m": 1563.5,
   "start_elevation_m": 578.32118382073,
   "end_elevation_m": 577.5107957740037,
   "start_xy": [
    649445.6692660657,
    4777295.70727675
   ],
   "end_xy": [
    649450.6430036888,
    4777295.1954818135
   ]
  },
  "min_10m": {
   "gradient_pct": -15.061513666714745,
   "start_distance_m": 1556.0,
   "end_distance_m": 1566.0,
   "midpoint_distance_m": 1561.0,
   "start_elevation_m": 579.0169471406751,
   "end_elevation_m": 577.5107957740037,
   "start_xy": [
    649440.6955284426,
    4777296.219071687
   ],
   "end_xy": [
    649450.6430036888,
    4777295.1954818135
   ]
  },
  "min_20m": {
   "gradient_pct": -14.208461217643844,
   "start_distance_m": 1590.0,
   "end_distance_m": 1610.0,
   "midpoint_distance_m": 1600.0,
   "start_elevation_m": 574.4670128198823,
   "end_elevation_m": 571.6253205763535,
   "start_xy": [
    649474.5169442794,
    4777292.738866119
   ],
   "end_xy": [
    649494.2475822496,
    4777289.860199892
   ]
  },
  "min_25m": {
   "gradient_pct": -13.867207392203909,
   "start_distance_m": 1557.0,
   "end_distance_m": 1582.0,
   "midpoint_distance_m": 1569.5,
   "start_elevation_m": 578.8867294942701,
   "end_elevation_m": 575.4199276462191,
   "start_xy": [
    649441.6902759672,
    4777296.1167127
   ],
   "end_xy": [
    649466.5589640825,
    4777293.557738016
   ]
  },
  "min_50m": {
   "gradient_pct": -13.700474196933556,
   "start_distance_m": 1558.0,
   "end_distance_m": 1608.0,
   "midpoint_distance_m": 1583.0,
   "start_elevation_m": 578.7346439145498,
   "end_elevation_m": 571.884406816083,
   "start_xy": [
    649442.6850234919,
    4777296.014353712
   ],
   "end_xy": [
    649492.3297615023,
    4777290.42761824
   ]
  },
  "min_100m": {
   "gradient_pct": -12.988439372176458,
   "start_distance_m": 1555.0,
   "end_distance_m": 1655.0,
   "midpoint_distance_m": 1605.0,
   "start_elevation_m": 579.1398068434377,
   "end_elevation_m": 566.1513674712612,
   "start_xy": [
    649439.7007809181,
    4777296.321430675
   ],
   "end_xy": [
    649536.873962005,
    4777275.621340654
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 26.208211474860832,
   "start_distance_m": 557.0,
   "end_distance_m": 559.0,
   "midpoint_distance_m": 558.0,
   "start_elevation_m": 468.501806533062,
   "end_elevation_m": 469.0259707625592,
   "start_xy": [
    648597.2940094314,
    4777346.818067772
   ],
   "end_xy": [
    648599.2186560561,
    4777347.361883339
   ]
  },
  "max_3m": {
   "gradient_pct": 25.872578921737006,
   "start_distance_m": 556.0,
   "end_distance_m": 559.0,
   "midpoint_distance_m": 557.5,
   "start_elevation_m": 468.2497933949071,
   "end_elevation_m": 469.0259707625592,
   "start_xy": [
    648596.3316861191,
    4777346.546159989
   ],
   "end_xy": [
    648599.2186560561,
    4777347.361883339
   ]
  }
 },
 "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_start_earlier",
   "descends_at_end"
  ],
  "suggested_summit_cut_m": 1484.0,
  "trailing_descent_m": 23.6
 },
 "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_x64y478_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T22:23:13+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": [
   "x64y478"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.5% over 200 m (Terrain 50), gain 172.9 m over 1751 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). ADOPTED (NE wave 1, 2026-08-25): clean-steep. 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": "Sandgate",
  "county": "Vermont"
 }
}