{
 "ocl_version": "0.1.0",
 "name": "Tucker Brook Road",
 "slug": "tucker-brook-road-3",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 41.57328281205537,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1655.0,
   "end_distance_m": 1657.0,
   "start_elevation_m": 346.75322489463974,
   "end_elevation_m": 347.58469055088085,
   "min_gradient_pct": -63.47722089771537
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.754324478494105,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1654.0,
   "end_distance_m": 1657.0,
   "start_elevation_m": 346.422060816526,
   "end_elevation_m": 347.58469055088085,
   "min_gradient_pct": -57.58368699526765
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 36.85989528833716,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1646.0,
   "end_distance_m": 1651.0,
   "start_elevation_m": 343.81179560474834,
   "end_elevation_m": 345.6547903691652,
   "min_gradient_pct": -42.68740984989677
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 33.91096498691752,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1647.0,
   "end_distance_m": 1657.0,
   "start_elevation_m": 344.1935940521891,
   "end_elevation_m": 347.58469055088085,
   "min_gradient_pct": -17.54582779688576
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 31.34749034741162,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1643.0,
   "end_distance_m": 1663.0,
   "start_elevation_m": 342.8848047575062,
   "end_elevation_m": 349.1543028269885,
   "min_gradient_pct": -12.532883778909252
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 27.77660207669419,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1638.0,
   "end_distance_m": 1663.0,
   "start_elevation_m": 342.21015230781495,
   "end_elevation_m": 349.1543028269885,
   "min_gradient_pct": -11.28017542526186
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.75249674891063,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1613.0,
   "end_distance_m": 1663.0,
   "start_elevation_m": 338.2780544525332,
   "end_elevation_m": 349.1543028269885,
   "min_gradient_pct": -7.354445247431954
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.829827162592721,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "no_bench_excluded"
   ],
   "start_distance_m": 1565.0,
   "end_distance_m": 1665.0,
   "start_elevation_m": 334.48029382534776,
   "end_elevation_m": 349.3101209879405,
   "min_gradient_pct": -3.4390491069420364,
   "suppressed_max_gradient_pct": 14.921455232997175,
   "suppressed_location_m": [
    1616.0,
    1716.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.324,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 112.0,
  "shape_class": "sustained"
 },
 "length_m": 1931.4171895035063,
 "start_elevation_m": 249.89270340446149,
 "end_elevation_m": 374.0740712036777,
 "endpoint_gain_m": 124.18136779921622,
 "overall_gradient_pct": 6.429546577202128,
 "accumulated_ascent_m": 142.17092314739443,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 36.85989528833716,
   "start_distance_m": 1646.0,
   "end_distance_m": 1651.0,
   "midpoint_distance_m": 1648.5,
   "start_elevation_m": 343.81179560474834,
   "end_elevation_m": 345.6547903691652,
   "start_xy": [
    707525.7190590672,
    4936652.63861002
   ],
   "end_xy": [
    707520.7582137104,
    4936653.261587636
   ]
  },
  "max_10m": {
   "gradient_pct": 33.91096498691752,
   "start_distance_m": 1647.0,
   "end_distance_m": 1657.0,
   "midpoint_distance_m": 1652.0,
   "start_elevation_m": 344.1935940521891,
   "end_elevation_m": 347.58469055088085,
   "start_xy": [
    707524.726415423,
    4936652.758223783
   ],
   "end_xy": [
    707514.8059111413,
    4936654.016633414
   ]
  },
  "max_20m": {
   "gradient_pct": 31.34749034741162,
   "start_distance_m": 1643.0,
   "end_distance_m": 1663.0,
   "midpoint_distance_m": 1653.0,
   "start_elevation_m": 342.8848047575062,
   "end_elevation_m": 349.1543028269885,
   "start_xy": [
    707528.7129601702,
    4936652.447413302
   ],
   "end_xy": [
    707508.9038983588,
    4936655.086072869
   ]
  },
  "max_25m": {
   "gradient_pct": 27.77660207669419,
   "start_distance_m": 1638.0,
   "end_distance_m": 1663.0,
   "midpoint_distance_m": 1650.5,
   "start_elevation_m": 342.21015230781495,
   "end_elevation_m": 349.1543028269885,
   "start_xy": [
    707533.702795342,
    4936652.128752104
   ],
   "end_xy": [
    707508.9038983588,
    4936655.086072869
   ]
  },
  "max_50m": {
   "gradient_pct": 21.75249674891063,
   "start_distance_m": 1613.0,
   "end_distance_m": 1663.0,
   "midpoint_distance_m": 1638.0,
   "start_elevation_m": 338.2780544525332,
   "end_elevation_m": 349.1543028269885,
   "start_xy": [
    707558.6554522358,
    4936650.597439122
   ],
   "end_xy": [
    707508.9038983588,
    4936655.086072869
   ]
  },
  "max_100m": {
   "gradient_pct": 14.829827162592721,
   "start_distance_m": 1565.0,
   "end_distance_m": 1665.0,
   "midpoint_distance_m": 1615.0,
   "start_elevation_m": 334.48029382534776,
   "end_elevation_m": 349.3101209879405,
   "start_xy": [
    707606.5992165725,
    4936648.274625908
   ],
   "end_xy": [
    707506.9402887713,
    4936655.465858844
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -42.68740984989677,
   "start_distance_m": 1090.0,
   "end_distance_m": 1095.0,
   "midpoint_distance_m": 1092.5,
   "start_elevation_m": 319.50744303041427,
   "end_elevation_m": 317.3730725379194,
   "start_xy": [
    707972.6595387815,
    4936504.352405071
   ],
   "end_xy": [
    707969.5689676313,
    4936508.281538983
   ]
  },
  "min_10m": {
   "gradient_pct": -17.54582779688576,
   "start_distance_m": 1423.0,
   "end_distance_m": 1433.0,
   "midpoint_distance_m": 1428.0,
   "start_elevation_m": 334.90354366332707,
   "end_elevation_m": 333.1489608836385,
   "start_xy": [
    707747.5624733147,
    4936659.489739537
   ],
   "end_xy": [
    707737.7768944325,
    4936657.430019668
   ]
  },
  "min_20m": {
   "gradient_pct": -12.532883778909252,
   "start_distance_m": 1423.0,
   "end_distance_m": 1443.0,
   "midpoint_distance_m": 1433.0,
   "start_elevation_m": 334.90354366332707,
   "end_elevation_m": 332.3969669075452,
   "start_xy": [
    707747.5624733147,
    4936659.489739537
   ],
   "end_xy": [
    707727.9913155502,
    4936655.370299799
   ]
  },
  "min_25m": {
   "gradient_pct": -11.28017542526186,
   "start_distance_m": 1416.0,
   "end_distance_m": 1441.0,
   "midpoint_distance_m": 1428.5,
   "start_elevation_m": 335.202687000247,
   "end_elevation_m": 332.38264314393155,
   "start_xy": [
    707754.2910789793,
    4936661.402947673
   ],
   "end_xy": [
    707729.9484313267,
    4936655.782243773
   ]
  },
  "min_50m": {
   "gradient_pct": -7.354445247431954,
   "start_distance_m": 1416.0,
   "end_distance_m": 1466.0,
   "midpoint_distance_m": 1441.0,
   "start_elevation_m": 335.202687000247,
   "end_elevation_m": 331.52546437653103,
   "start_xy": [
    707754.2910789793,
    4936661.402947673
   ],
   "end_xy": [
    707705.3159338863,
    4936651.530315885
   ]
  },
  "min_100m": {
   "gradient_pct": -3.4390491069420364,
   "start_distance_m": 1407.0,
   "end_distance_m": 1507.0,
   "midpoint_distance_m": 1457.0,
   "start_elevation_m": 335.57913714928964,
   "end_elevation_m": 332.1400880423476,
   "start_xy": [
    707762.8990294635,
    4936664.030339623
   ],
   "end_xy": [
    707664.5716861977,
    4936647.213151109
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 41.57328281205537,
   "start_distance_m": 1655.0,
   "end_distance_m": 1657.0,
   "midpoint_distance_m": 1656.0,
   "start_elevation_m": 346.75322489463974,
   "end_elevation_m": 347.58469055088085,
   "start_xy": [
    707516.7900119977,
    4936653.764951487
   ],
   "end_xy": [
    707514.8059111413,
    4936654.016633414
   ]
  },
  "max_3m": {
   "gradient_pct": 38.754324478494105,
   "start_distance_m": 1654.0,
   "end_distance_m": 1657.0,
   "midpoint_distance_m": 1655.5,
   "start_elevation_m": 346.422060816526,
   "end_elevation_m": 347.58469055088085,
   "start_xy": [
    707517.7820624259,
    4936653.639110524
   ],
   "end_xy": [
    707514.8059111413,
    4936654.016633414
   ]
  }
 },
 "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": 0.411,
   "obstruction_max_height_m": 27.15,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.003,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.048,
   "windows_resited": [
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    1050.0,
    1100.0
   ],
   [
    1670.0,
    1710.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "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_x70y494_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-25T01:28:48+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-3-260824",
  "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": [
   "x70y494"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.0% over 200 m (Terrain 50), gain 124.7 m over 1931 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_1_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": "Hardwick",
  "county": "Vermont"
 }
}