{
 "ocl_version": "0.1.0",
 "name": "Tucker Brook Road",
 "slug": "tucker-brook-road-2",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.167349556904924,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 668.0,
   "end_distance_m": 670.0,
   "start_elevation_m": 418.31074323987843,
   "end_elevation_m": 418.97409023101653,
   "min_gradient_pct": -44.95653906159873,
   "suppressed_max_gradient_pct": 53.904489310474446,
   "suppressed_location_m": [
    533.0,
    535.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.438331778572017,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1100.0,
   "end_distance_m": 1103.0,
   "start_elevation_m": 467.91652018852506,
   "end_elevation_m": 468.7696701418822,
   "min_gradient_pct": -35.95995568925711,
   "suppressed_max_gradient_pct": 47.72987628654543,
   "suppressed_location_m": [
    533.0,
    536.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.902343818027248,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1098.0,
   "end_distance_m": 1103.0,
   "start_elevation_m": 467.42455295098085,
   "end_elevation_m": 468.7696701418822,
   "min_gradient_pct": -24.314736269153627,
   "suppressed_max_gradient_pct": 34.99279352993199,
   "suppressed_location_m": [
    533.0,
    538.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.196067545630626,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1098.0,
   "end_distance_m": 1108.0,
   "start_elevation_m": 467.42455295098085,
   "end_elevation_m": 469.8441597055439,
   "min_gradient_pct": -9.892615945084344
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.31808869205281,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1088.0,
   "end_distance_m": 1108.0,
   "start_elevation_m": 465.38054196713335,
   "end_elevation_m": 469.8441597055439,
   "min_gradient_pct": -3.275250714452511
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.13052450367468,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1087.0,
   "end_distance_m": 1112.0,
   "start_elevation_m": 465.17593153602917,
   "end_elevation_m": 470.70856266194784,
   "min_gradient_pct": -1.4072974967532446
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.53810666787615,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1062.0,
   "end_distance_m": 1112.0,
   "start_elevation_m": 461.43950932800976,
   "end_elevation_m": 470.70856266194784,
   "min_gradient_pct": 2.908236451162793
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.16690778441705,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1018.0,
   "end_distance_m": 1118.0,
   "start_elevation_m": 454.503912015278,
   "end_elevation_m": 471.67081979969504,
   "min_gradient_pct": 5.508235332388324
  }
 ],
 "shape": {
  "ascent_concentration": 0.293,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 131.0,
  "shape_class": "sustained"
 },
 "length_m": 1144.919060404516,
 "start_elevation_m": 356.3415472046144,
 "end_elevation_m": 474.19558157716125,
 "endpoint_gain_m": 117.85403437254683,
 "overall_gradient_pct": 10.293656420647531,
 "accumulated_ascent_m": 119.71519853479265,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.902343818027248,
   "start_distance_m": 1098.0,
   "end_distance_m": 1103.0,
   "midpoint_distance_m": 1100.5,
   "start_elevation_m": 467.42455295098085,
   "end_elevation_m": 468.7696701418822,
   "start_xy": [
    671266.5646529739,
    4867362.67418972
   ],
   "end_xy": [
    671262.158799708,
    4867360.31019797
   ]
  },
  "max_10m": {
   "gradient_pct": 24.196067545630626,
   "start_distance_m": 1098.0,
   "end_distance_m": 1108.0,
   "midpoint_distance_m": 1103.0,
   "start_elevation_m": 467.42455295098085,
   "end_elevation_m": 469.8441597055439,
   "start_xy": [
    671266.5646529739,
    4867362.67418972
   ],
   "end_xy": [
    671257.752946442,
    4867357.946206219
   ]
  },
  "max_20m": {
   "gradient_pct": 22.31808869205281,
   "start_distance_m": 1088.0,
   "end_distance_m": 1108.0,
   "midpoint_distance_m": 1098.0,
   "start_elevation_m": 465.38054196713335,
   "end_elevation_m": 469.8441597055439,
   "start_xy": [
    671275.7099498112,
    4867366.535718955
   ],
   "end_xy": [
    671257.752946442,
    4867357.946206219
   ]
  },
  "max_25m": {
   "gradient_pct": 22.13052450367468,
   "start_distance_m": 1087.0,
   "end_distance_m": 1112.0,
   "midpoint_distance_m": 1099.5,
   "start_elevation_m": 465.17593153602917,
   "end_elevation_m": 470.70856266194784,
   "start_xy": [
    671276.6806749409,
    4867366.775912049
   ],
   "end_xy": [
    671254.2282638293,
    4867356.0550128175
   ]
  },
  "max_50m": {
   "gradient_pct": 18.53810666787615,
   "start_distance_m": 1062.0,
   "end_distance_m": 1112.0,
   "midpoint_distance_m": 1087.0,
   "start_elevation_m": 461.43950932800976,
   "end_elevation_m": 470.70856266194784,
   "start_xy": [
    671301.1977721495,
    4867368.526209201
   ],
   "end_xy": [
    671254.2282638293,
    4867356.0550128175
   ]
  },
  "max_100m": {
   "gradient_pct": 17.16690778441705,
   "start_distance_m": 1018.0,
   "end_distance_m": 1118.0,
   "midpoint_distance_m": 1068.0,
   "start_elevation_m": 454.503912015278,
   "end_elevation_m": 471.67081979969504,
   "start_xy": [
    671335.023178907,
    4867340.714124869
   ],
   "end_xy": [
    671248.8436826337,
    4867353.560329511
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -24.314736269153627,
   "start_distance_m": 528.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 530.5,
   "start_elevation_m": 407.21911125683636,
   "end_elevation_m": 406.0033744433787,
   "start_xy": [
    671329.9742285088,
    4866857.290630519
   ],
   "end_xy": [
    671330.23069419,
    4866862.284048723
   ]
  },
  "min_10m": {
   "gradient_pct": -9.892615945084344,
   "start_distance_m": 523.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 528.0,
   "start_elevation_m": 406.9926360378871,
   "end_elevation_m": 406.0033744433787,
   "start_xy": [
    671329.7177628275,
    4866852.297212316
   ],
   "end_xy": [
    671330.23069419,
    4866862.284048723
   ]
  },
  "min_20m": {
   "gradient_pct": -3.275250714452511,
   "start_distance_m": 513.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 523.0,
   "start_elevation_m": 406.6584245862692,
   "end_elevation_m": 406.0033744433787,
   "start_xy": [
    671329.2101432541,
    4866842.310135843
   ],
   "end_xy": [
    671330.23069419,
    4866862.284048723
   ]
  },
  "min_25m": {
   "gradient_pct": -1.4072974967532446,
   "start_distance_m": 508.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 520.5,
   "start_elevation_m": 406.355198817567,
   "end_elevation_m": 406.0033744433787,
   "start_xy": [
    671329.0151291599,
    4866837.313940341
   ],
   "end_xy": [
    671330.23069419,
    4866862.284048723
   ]
  },
  "min_50m": {
   "gradient_pct": 2.908236451162793,
   "start_distance_m": 618.0,
   "end_distance_m": 668.0,
   "midpoint_distance_m": 643.0,
   "start_elevation_m": 416.85662501429704,
   "end_elevation_m": 418.31074323987843,
   "start_xy": [
    671332.6223303764,
    4866947.097486154
   ],
   "end_xy": [
    671334.006491365,
    4866996.81307487
   ]
  },
  "min_100m": {
   "gradient_pct": 5.508235332388324,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 356.3415472046144,
   "end_elevation_m": 361.84978253700274,
   "start_xy": [
    671432.241,
    4866384.604
   ],
   "end_xy": [
    671351.8028984229,
    4866443.692567078
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.167349556904924,
   "start_distance_m": 668.0,
   "end_distance_m": 670.0,
   "midpoint_distance_m": 669.0,
   "start_elevation_m": 418.31074323987843,
   "end_elevation_m": 418.97409023101653,
   "start_xy": [
    671334.006491365,
    4866996.81307487
   ],
   "end_xy": [
    671334.4456647884,
    4866998.764260843
   ]
  },
  "max_3m": {
   "gradient_pct": 28.438331778572017,
   "start_distance_m": 1100.0,
   "end_distance_m": 1103.0,
   "midpoint_distance_m": 1101.5,
   "start_elevation_m": 467.91652018852506,
   "end_elevation_m": 468.7696701418822,
   "start_xy": [
    671264.8023116675,
    4867361.72859302
   ],
   "end_xy": [
    671262.158799708,
    4867360.31019797
   ]
  }
 },
 "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": 0.005,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.65,
   "obstruction_max_height_m": 25.61,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    532.0,
    537.0
   ]
  ],
  "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_x67y487_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-04T21:34:39+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": "hunt-wave1-260905",
  "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": [
   "x67y487"
  ],
  "climb_origin": "discovered",
  "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": "Hancock",
  "county": "Vermont"
 }
}