{
 "ocl_version": "0.1.0",
 "name": "East Hill Road",
 "slug": "east-hill-road-vt",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.835891908346696,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 263.0,
   "end_distance_m": 265.0,
   "start_elevation_m": 170.74775572688787,
   "end_elevation_m": 171.2244735650548,
   "min_gradient_pct": -14.088151638642898,
   "suppressed_max_gradient_pct": 155.860516043451,
   "suppressed_location_m": [
    0.0,
    2.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.701213047347817,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 263.0,
   "end_distance_m": 266.0,
   "start_elevation_m": 170.74775572688787,
   "end_elevation_m": 171.4287921183083,
   "min_gradient_pct": -13.944812414793736,
   "suppressed_max_gradient_pct": 110.98008155791017,
   "suppressed_location_m": [
    0.0,
    3.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.8350587159847,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 263.0,
   "end_distance_m": 268.0,
   "start_elevation_m": 170.74775572688787,
   "end_elevation_m": 171.8395086626871,
   "min_gradient_pct": -13.796981854023898,
   "suppressed_max_gradient_pct": 65.80790726346265,
   "suppressed_location_m": [
    0.0,
    5.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.163514918304998,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 275.0,
   "end_distance_m": 285.0,
   "start_elevation_m": 173.2428380777746,
   "end_elevation_m": 175.3591895696051,
   "min_gradient_pct": -13.401651379283521,
   "suppressed_max_gradient_pct": 31.829261489983196,
   "suppressed_location_m": [
    0.0,
    10.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.12804636306663,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 274.0,
   "end_distance_m": 294.0,
   "start_elevation_m": 173.02963382664214,
   "end_elevation_m": 177.25524309925547,
   "min_gradient_pct": -12.63921362207185
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.020537030998412,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 277.0,
   "end_distance_m": 302.0,
   "start_elevation_m": 173.66487174071102,
   "end_elevation_m": 178.92000599846062,
   "min_gradient_pct": -12.124169194372826
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.618549462767586,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 262.0,
   "end_distance_m": 312.0,
   "start_elevation_m": 170.5542398199108,
   "end_elevation_m": 180.8635145512946,
   "min_gradient_pct": -10.47536912593614
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.800779148484764,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 115.0,
   "end_distance_m": 215.0,
   "start_elevation_m": 143.99961419070056,
   "end_elevation_m": 163.80039333918532,
   "min_gradient_pct": -8.594852499498302
  }
 ],
 "shape": {
  "ascent_concentration": 0.558,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 467.0,
  "shape_class": "stepped"
 },
 "length_m": 4155.458520823966,
 "start_elevation_m": 136.3745648287286,
 "end_elevation_m": 312.9048698239828,
 "endpoint_gain_m": 176.53030499525417,
 "overall_gradient_pct": 4.248154664776941,
 "accumulated_ascent_m": 245.75926254844327,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.8350587159847,
   "start_distance_m": 263.0,
   "end_distance_m": 268.0,
   "midpoint_distance_m": 265.5,
   "start_elevation_m": 170.74775572688787,
   "end_elevation_m": 171.8395086626871,
   "start_xy": [
    690509.6991438215,
    4767781.327993432
   ],
   "end_xy": [
    690513.1372368938,
    4767784.958293312
   ]
  },
  "max_10m": {
   "gradient_pct": 21.163514918304998,
   "start_distance_m": 275.0,
   "end_distance_m": 285.0,
   "midpoint_distance_m": 280.0,
   "start_elevation_m": 173.2428380777746,
   "end_elevation_m": 175.3591895696051,
   "start_xy": [
    690517.973776926,
    4767790.018716271
   ],
   "end_xy": [
    690524.8831198292,
    4767797.247891925
   ]
  },
  "max_20m": {
   "gradient_pct": 21.12804636306663,
   "start_distance_m": 274.0,
   "end_distance_m": 294.0,
   "midpoint_distance_m": 284.0,
   "start_elevation_m": 173.02963382664214,
   "end_elevation_m": 177.25524309925547,
   "start_xy": [
    690517.2828426356,
    4767789.295798705
   ],
   "end_xy": [
    690531.1015284422,
    4767803.754150014
   ]
  },
  "max_25m": {
   "gradient_pct": 21.020537030998412,
   "start_distance_m": 277.0,
   "end_distance_m": 302.0,
   "midpoint_distance_m": 289.5,
   "start_elevation_m": 173.66487174071102,
   "end_elevation_m": 178.92000599846062,
   "start_xy": [
    690519.3556455066,
    4767791.464551401
   ],
   "end_xy": [
    690536.6290027648,
    4767809.537490538
   ]
  },
  "max_50m": {
   "gradient_pct": 20.618549462767586,
   "start_distance_m": 262.0,
   "end_distance_m": 312.0,
   "midpoint_distance_m": 287.0,
   "start_elevation_m": 170.5542398199108,
   "end_elevation_m": 180.8635145512946,
   "start_xy": [
    690509.0143139651,
    4767780.599290428
   ],
   "end_xy": [
    690542.4341241893,
    4767817.6159662595
   ]
  },
  "max_100m": {
   "gradient_pct": 19.800779148484764,
   "start_distance_m": 115.0,
   "end_distance_m": 215.0,
   "midpoint_distance_m": 165.0,
   "start_elevation_m": 143.99961419070056,
   "end_elevation_m": 163.80039333918532,
   "start_xy": [
    690411.6662249003,
    4767670.775273951
   ],
   "end_xy": [
    690476.476050594,
    4767746.692120256
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -13.796981854023898,
   "start_distance_m": 4136.0,
   "end_distance_m": 4141.0,
   "midpoint_distance_m": 4138.5,
   "start_elevation_m": 315.1997613985915,
   "end_elevation_m": 314.5099123058903,
   "start_xy": [
    692694.6210166079,
    4770530.985734286
   ],
   "end_xy": [
    692695.1228490467,
    4770535.960486963
   ]
  },
  "min_10m": {
   "gradient_pct": -13.401651379283521,
   "start_distance_m": 4133.0,
   "end_distance_m": 4143.0,
   "midpoint_distance_m": 4138.0,
   "start_elevation_m": 315.5865395158253,
   "end_elevation_m": 314.2463743778969,
   "start_xy": [
    692694.3199171446,
    4770528.000882679
   ],
   "end_xy": [
    692695.3235820222,
    4770537.950388034
   ]
  },
  "min_20m": {
   "gradient_pct": -12.63921362207185,
   "start_distance_m": 4129.0,
   "end_distance_m": 4149.0,
   "midpoint_distance_m": 4139.0,
   "start_elevation_m": 316.0641391173903,
   "end_elevation_m": 313.53629639297594,
   "start_xy": [
    692693.8599457542,
    4770524.080963269
   ],
   "end_xy": [
    692695.9257809488,
    4770543.920091247
   ]
  },
  "min_25m": {
   "gradient_pct": -12.124169194372826,
   "start_distance_m": 4129.0,
   "end_distance_m": 4154.0,
   "midpoint_distance_m": 4141.5,
   "start_elevation_m": 316.0641391173903,
   "end_elevation_m": 313.0330968187971,
   "start_xy": [
    692693.8599457542,
    4770524.080963269
   ],
   "end_xy": [
    692696.4276133876,
    4770548.894843925
   ]
  },
  "min_50m": {
   "gradient_pct": -10.47536912593614,
   "start_distance_m": 3925.0,
   "end_distance_m": 3975.0,
   "midpoint_distance_m": 3950.0,
   "start_elevation_m": 328.3688696895517,
   "end_elevation_m": 323.1311851265836,
   "start_xy": [
    692492.0108858843,
    4770496.032384673
   ],
   "end_xy": [
    692541.0009328811,
    4770505.702675752
   ]
  },
  "min_100m": {
   "gradient_pct": -8.594852499498302,
   "start_distance_m": 3905.0,
   "end_distance_m": 4005.0,
   "midpoint_distance_m": 3955.0,
   "start_elevation_m": 329.76170126839065,
   "end_elevation_m": 321.16684876889235,
   "start_xy": [
    692472.8155650382,
    4770490.417686075
   ],
   "end_xy": [
    692570.7255376745,
    4770509.734884839
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.835891908346696,
   "start_distance_m": 263.0,
   "end_distance_m": 265.0,
   "midpoint_distance_m": 264.0,
   "start_elevation_m": 170.74775572688787,
   "end_elevation_m": 171.2244735650548,
   "start_xy": [
    690509.6991438215,
    4767781.327993432
   ],
   "end_xy": [
    690511.0688035343,
    4767782.78539944
   ]
  },
  "max_3m": {
   "gradient_pct": 22.701213047347817,
   "start_distance_m": 263.0,
   "end_distance_m": 266.0,
   "midpoint_distance_m": 264.5,
   "start_elevation_m": 170.74775572688787,
   "end_elevation_m": 171.4287921183083,
   "start_xy": [
    690509.6991438215,
    4767781.327993432
   ],
   "end_xy": [
    690511.755368313,
    4767783.512458182
   ]
  }
 },
 "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": 0.001,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    0.0,
    4.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "descends_at_end"
  ],
  "suggested_summit_cut_m": 2395.0,
  "trailing_descent_m": 44.0
 },
 "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_x69y477_VT_Statewide_A23.tif",
   "data/cache/usa/vt/USGS_1M_18_x69y478_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T20:37:38+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": [
   "x69y477",
   "x69y478"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 19.0% over 200 m (Terrain 50), gain 173.9 m over 4144 m way. EXTENDED by graph walk: +1 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'. Slug suffixed -vt (suffix(ct:east-hill-road)); doc slug patched at corpus copy.",
  "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": "Townshend",
  "county": "Vermont"
 }
}