{
 "ocl_version": "0.1.0",
 "name": "Harolyn Hill Road",
 "slug": "harolyn-hill-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 41.876262900186134,
   "diagnostic": true,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1811.0,
   "end_distance_m": 1813.0,
   "start_elevation_m": 400.88298989623047,
   "end_elevation_m": 401.7205151542342,
   "min_gradient_pct": -37.70451582964256,
   "suppressed_max_gradient_pct": 48.13846767885934,
   "suppressed_location_m": [
    1857.0,
    1859.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 39.061996291449454,
   "diagnostic": true,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1811.0,
   "end_distance_m": 1814.0,
   "start_elevation_m": 400.88298989623047,
   "end_elevation_m": 402.05484978497395,
   "min_gradient_pct": -36.027692965435186,
   "suppressed_max_gradient_pct": 44.901961635012334,
   "suppressed_location_m": [
    1857.0,
    1860.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 30.58239209287194,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1194.0,
   "end_distance_m": 1199.0,
   "start_elevation_m": 379.198922028084,
   "end_elevation_m": 380.7280416327276,
   "min_gradient_pct": -33.3046472870376,
   "suppressed_max_gradient_pct": 35.92577314009304,
   "suppressed_location_m": [
    1856.0,
    1861.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.120353095795735,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1189.0,
   "end_distance_m": 1199.0,
   "start_elevation_m": 378.216006323148,
   "end_elevation_m": 380.7280416327276,
   "min_gradient_pct": -20.13164385868265,
   "suppressed_max_gradient_pct": 26.301329680424033,
   "suppressed_location_m": [
    1194.0,
    1204.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.799392958587873,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 650.0,
   "end_distance_m": 670.0,
   "start_elevation_m": 343.1612015443359,
   "end_elevation_m": 347.52108013605346,
   "min_gradient_pct": -15.167707679428588
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.519144126293895,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 650.0,
   "end_distance_m": 675.0,
   "start_elevation_m": 343.1612015443359,
   "end_elevation_m": 348.29098757590936,
   "min_gradient_pct": -14.528585086645762
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.10455416848731,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 633.0,
   "end_distance_m": 683.0,
   "start_elevation_m": 340.35118198631983,
   "end_elevation_m": 349.4034590705635,
   "min_gradient_pct": -10.314174155401929,
   "suppressed_max_gradient_pct": 18.46353839165704,
   "suppressed_location_m": [
    1155.0,
    1205.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.4557999411158,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 614.0,
   "end_distance_m": 714.0,
   "start_elevation_m": 338.0214586601123,
   "end_elevation_m": 353.4772586012281,
   "min_gradient_pct": -6.508714064732089
  }
 ],
 "shape": {
  "ascent_concentration": 0.347,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 162.0,
  "shape_class": "sustained"
 },
 "length_m": 1863.8529000960418,
 "start_elevation_m": 270.5792602344082,
 "end_elevation_m": 409.5635145459041,
 "endpoint_gain_m": 138.98425431149593,
 "overall_gradient_pct": 7.4568252840304226,
 "accumulated_ascent_m": 167.2216354888917,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 30.58239209287194,
   "start_distance_m": 1194.0,
   "end_distance_m": 1199.0,
   "midpoint_distance_m": 1196.5,
   "start_elevation_m": 379.198922028084,
   "end_elevation_m": 380.7280416327276,
   "start_xy": [
    705860.0797303615,
    4869085.027288002
   ],
   "end_xy": [
    705864.7649256428,
    4869083.281165103
   ]
  },
  "max_10m": {
   "gradient_pct": 25.120353095795735,
   "start_distance_m": 1189.0,
   "end_distance_m": 1199.0,
   "midpoint_distance_m": 1194.0,
   "start_elevation_m": 378.216006323148,
   "end_elevation_m": 380.7280416327276,
   "start_xy": [
    705855.3945350802,
    4869086.7734109
   ],
   "end_xy": [
    705864.7649256428,
    4869083.281165103
   ]
  },
  "max_20m": {
   "gradient_pct": 21.799392958587873,
   "start_distance_m": 650.0,
   "end_distance_m": 670.0,
   "midpoint_distance_m": 660.0,
   "start_elevation_m": 343.1612015443359,
   "end_elevation_m": 347.52108013605346,
   "start_xy": [
    705334.4525311803,
    4869214.886534513
   ],
   "end_xy": [
    705353.7287456243,
    4869209.55478464
   ]
  },
  "max_25m": {
   "gradient_pct": 20.519144126293895,
   "start_distance_m": 650.0,
   "end_distance_m": 675.0,
   "midpoint_distance_m": 662.5,
   "start_elevation_m": 343.1612015443359,
   "end_elevation_m": 348.29098757590936,
   "start_xy": [
    705334.4525311803,
    4869214.886534513
   ],
   "end_xy": [
    705358.5477992353,
    4869208.221847172
   ]
  },
  "max_50m": {
   "gradient_pct": 18.10455416848731,
   "start_distance_m": 633.0,
   "end_distance_m": 683.0,
   "midpoint_distance_m": 658.0,
   "start_elevation_m": 340.35118198631983,
   "end_elevation_m": 349.4034590705635,
   "start_xy": [
    705318.067748903,
    4869219.418521905
   ],
   "end_xy": [
    705366.2582850129,
    4869206.089147222
   ]
  },
  "max_100m": {
   "gradient_pct": 15.4557999411158,
   "start_distance_m": 614.0,
   "end_distance_m": 714.0,
   "midpoint_distance_m": 664.0,
   "start_elevation_m": 338.0214586601123,
   "end_elevation_m": 353.4772586012281,
   "start_xy": [
    705299.7553451811,
    4869224.483684285
   ],
   "end_xy": [
    705396.136417401,
    4869197.824934919
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -33.3046472870376,
   "start_distance_m": 1232.0,
   "end_distance_m": 1237.0,
   "midpoint_distance_m": 1234.5,
   "start_elevation_m": 384.4002942997044,
   "end_elevation_m": 382.7350619353525,
   "start_xy": [
    705895.6872144992,
    4869071.756753974
   ],
   "end_xy": [
    705900.3724097805,
    4869070.010631076
   ]
  },
  "min_10m": {
   "gradient_pct": -20.13164385868265,
   "start_distance_m": 1230.0,
   "end_distance_m": 1240.0,
   "midpoint_distance_m": 1235.0,
   "start_elevation_m": 384.672356158118,
   "end_elevation_m": 382.65919177224976,
   "start_xy": [
    705893.8131363867,
    4869072.455203134
   ],
   "end_xy": [
    705903.1835269493,
    4869068.962957337
   ]
  },
  "min_20m": {
   "gradient_pct": -15.167707679428588,
   "start_distance_m": 1010.0,
   "end_distance_m": 1030.0,
   "midpoint_distance_m": 1020.0,
   "start_elevation_m": 375.35441344045864,
   "end_elevation_m": 372.3208719045729,
   "start_xy": [
    705686.4193462613,
    4869145.153697785
   ],
   "end_xy": [
    705705.8981299779,
    4869140.61751162
   ]
  },
  "min_25m": {
   "gradient_pct": -14.528585086645762,
   "start_distance_m": 1010.0,
   "end_distance_m": 1035.0,
   "midpoint_distance_m": 1022.5,
   "start_elevation_m": 375.35441344045864,
   "end_elevation_m": 371.7222671687972,
   "start_xy": [
    705686.4193462613,
    4869145.153697785
   ],
   "end_xy": [
    705710.7678259071,
    4869139.483465079
   ]
  },
  "min_50m": {
   "gradient_pct": -10.314174155401929,
   "start_distance_m": 995.0,
   "end_distance_m": 1045.0,
   "midpoint_distance_m": 1020.0,
   "start_elevation_m": 376.3410671518092,
   "end_elevation_m": 371.18398007410826,
   "start_xy": [
    705671.8102584739,
    4869148.555837409
   ],
   "end_xy": [
    705720.4609109788,
    4869137.061750373
   ]
  },
  "min_100m": {
   "gradient_pct": -6.508714064732089,
   "start_distance_m": 1560.0,
   "end_distance_m": 1660.0,
   "midpoint_distance_m": 1610.0,
   "start_elevation_m": 405.4085357410985,
   "end_elevation_m": 398.8998216763664,
   "start_xy": [
    706189.4595470787,
    4868927.642718581
   ],
   "end_xy": [
    706287.0528951596,
    4868910.97931722
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 41.876262900186134,
   "start_distance_m": 1811.0,
   "end_distance_m": 1813.0,
   "midpoint_distance_m": 1812.0,
   "start_elevation_m": 400.88298989623047,
   "end_elevation_m": 401.7205151542342,
   "start_xy": [
    706435.693655672,
    4868925.8075419245
   ],
   "end_xy": [
    706437.4362617147,
    4868926.789032719
   ]
  },
  "max_3m": {
   "gradient_pct": 39.061996291449454,
   "start_distance_m": 1811.0,
   "end_distance_m": 1814.0,
   "midpoint_distance_m": 1812.5,
   "start_elevation_m": 400.88298989623047,
   "end_elevation_m": 402.05484978497395,
   "start_xy": [
    706435.693655672,
    4868925.8075419245
   ],
   "end_xy": [
    706438.307564736,
    4868927.279778116
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.219,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.797,
   "obstruction_max_height_m": 35.45,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    20.0
   ],
   [
    750.0,
    900.0
   ],
   [
    1200.0,
    1240.0
   ],
   [
    1370.0,
    1410.0
   ],
   [
    1430.0,
    1460.0
   ],
   [
    1480.0,
    1540.0
   ],
   [
    1650.0,
    1680.0
   ],
   [
    1830.0,
    1860.0
   ]
  ],
  "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_x70y487_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-04T21:35:03+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": [
   "x70y487"
  ],
  "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"
 },
 "area": {
  "place": "Chelsea",
  "county": "Vermont"
 }
}