{
 "ocl_version": "0.1.0",
 "name": "Holliday Road",
 "slug": "holliday-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.41147018383367,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 617.0,
   "end_distance_m": 619.0,
   "start_elevation_m": 541.9297803621554,
   "end_elevation_m": 542.3980097658321,
   "min_gradient_pct": -21.25654617605619,
   "suppressed_max_gradient_pct": 61.155980492929984,
   "suppressed_location_m": [
    687.0,
    689.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.455472306577878,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 525.0,
   "end_distance_m": 528.0,
   "start_elevation_m": 529.3732394197474,
   "end_elevation_m": 530.0169035889447,
   "min_gradient_pct": -16.95864155029388,
   "suppressed_max_gradient_pct": 56.09319224039003,
   "suppressed_location_m": [
    687.0,
    690.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 17.983164301249417,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 523.0,
   "end_distance_m": 528.0,
   "start_elevation_m": 529.1177453738823,
   "end_elevation_m": 530.0169035889447,
   "min_gradient_pct": -9.227783441169777,
   "suppressed_max_gradient_pct": 46.668738090845636,
   "suppressed_location_m": [
    687.0,
    692.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 15.259711253775095,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 158.0,
   "end_distance_m": 168.0,
   "start_elevation_m": 508.4206362069889,
   "end_elevation_m": 509.9466073323664,
   "min_gradient_pct": -6.552203618597332,
   "suppressed_max_gradient_pct": 38.90647610278165,
   "suppressed_location_m": [
    686.0,
    696.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 12.584545976519905,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 153.0,
   "end_distance_m": 173.0,
   "start_elevation_m": 507.8442097660053,
   "end_elevation_m": 510.3611189613093,
   "min_gradient_pct": -2.8845381161454497,
   "suppressed_max_gradient_pct": 38.199906632810325,
   "suppressed_location_m": [
    687.0,
    707.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 11.463416863202383,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 455.0,
   "end_distance_m": 480.0,
   "start_elevation_m": 525.2919379967536,
   "end_elevation_m": 528.1577922125542,
   "min_gradient_pct": -1.4585829672550972,
   "suppressed_max_gradient_pct": 35.014955652407025,
   "suppressed_location_m": [
    685.0,
    710.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 10.057700755402948,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 299.0,
   "end_distance_m": 349.0,
   "start_elevation_m": 517.0142100951674,
   "end_elevation_m": 522.0430604728689,
   "min_gradient_pct": -0.2765982308205821,
   "suppressed_max_gradient_pct": 25.337575068591605,
   "suppressed_location_m": [
    668.0,
    718.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 8.689729350522953,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 271.0,
   "end_distance_m": 371.0,
   "start_elevation_m": 515.0734757797576,
   "end_elevation_m": 523.7632051302805,
   "min_gradient_pct": 2.262145165892832,
   "suppressed_max_gradient_pct": 20.739856390278078,
   "suppressed_location_m": [
    617.0,
    717.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.527,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 59.0,
  "shape_class": "stepped"
 },
 "length_m": 718.3674967420404,
 "start_elevation_m": 502.8531759823452,
 "end_elevation_m": 562.8438242448558,
 "endpoint_gain_m": 59.990648262510604,
 "overall_gradient_pct": 8.350969181454033,
 "accumulated_ascent_m": 62.78857202961768,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 17.983164301249417,
   "start_distance_m": 523.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 525.5,
   "start_elevation_m": 529.1177453738823,
   "end_elevation_m": 530.0169035889447,
   "start_xy": [
    715201.8490876552,
    4955794.522003756
   ],
   "end_xy": [
    715196.8496709107,
    4955794.533287686
   ]
  },
  "max_10m": {
   "gradient_pct": 15.259711253775095,
   "start_distance_m": 158.0,
   "end_distance_m": 168.0,
   "midpoint_distance_m": 163.0,
   "start_elevation_m": 508.4206362069889,
   "end_elevation_m": 509.9466073323664,
   "start_xy": [
    715554.874711866,
    4955719.059814323
   ],
   "end_xy": [
    715545.5206655877,
    4955722.595605355
   ]
  },
  "max_20m": {
   "gradient_pct": 12.584545976519905,
   "start_distance_m": 153.0,
   "end_distance_m": 173.0,
   "midpoint_distance_m": 163.0,
   "start_elevation_m": 507.8442097660053,
   "end_elevation_m": 510.3611189613093,
   "start_xy": [
    715559.5517350052,
    4955717.291918807
   ],
   "end_xy": [
    715540.8436424485,
    4955724.363500871
   ]
  },
  "max_25m": {
   "gradient_pct": 11.463416863202383,
   "start_distance_m": 455.0,
   "end_distance_m": 480.0,
   "midpoint_distance_m": 467.5,
   "start_elevation_m": 525.2919379967536,
   "end_elevation_m": 528.1577922125542,
   "start_xy": [
    715269.6059721031,
    4955790.299294198
   ],
   "end_xy": [
    715244.8017276064,
    4955793.3932456495
   ]
  },
  "max_50m": {
   "gradient_pct": 10.057700755402948,
   "start_distance_m": 299.0,
   "end_distance_m": 349.0,
   "midpoint_distance_m": 324.0,
   "start_elevation_m": 517.0142100951674,
   "end_elevation_m": 522.0430604728689,
   "start_xy": [
    715421.4660073534,
    4955760.45692444
   ],
   "end_xy": [
    715371.5842539789,
    4955762.59496502
   ]
  },
  "max_100m": {
   "gradient_pct": 8.689729350522953,
   "start_distance_m": 271.0,
   "end_distance_m": 371.0,
   "midpoint_distance_m": 321.0,
   "start_elevation_m": 515.0734757797576,
   "end_elevation_m": 523.7632051302805,
   "start_xy": [
    715449.3323231827,
    4955757.907537404
   ],
   "end_xy": [
    715350.2850455118,
    4955768.103478311
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.227783441169777,
   "start_distance_m": 490.0,
   "end_distance_m": 495.0,
   "midpoint_distance_m": 492.5,
   "start_elevation_m": 528.5321519809141,
   "end_elevation_m": 528.0707628088556,
   "start_xy": [
    715234.8483448797,
    4955794.300593205
   ],
   "end_xy": [
    715229.8484574214,
    4955794.334140258
   ]
  },
  "min_10m": {
   "gradient_pct": -6.552203618597332,
   "start_distance_m": 487.0,
   "end_distance_m": 497.0,
   "midpoint_distance_m": 492.0,
   "start_elevation_m": 528.6510242475916,
   "end_elevation_m": 527.9958038857319,
   "start_xy": [
    715237.8392614179,
    4955794.117168693
   ],
   "end_xy": [
    715227.8485024382,
    4955794.3475590795
   ]
  },
  "min_20m": {
   "gradient_pct": -2.8845381161454497,
   "start_distance_m": 486.0,
   "end_distance_m": 506.0,
   "midpoint_distance_m": 496.0,
   "start_elevation_m": 528.6547762217259,
   "end_elevation_m": 528.0778685984968,
   "start_xy": [
    715238.8338994448,
    4955794.013751115
   ],
   "end_xy": [
    715218.8487050133,
    4955794.407943775
   ]
  },
  "min_25m": {
   "gradient_pct": -1.4585829672550972,
   "start_distance_m": 396.0,
   "end_distance_m": 421.0,
   "midpoint_distance_m": 408.5,
   "start_elevation_m": 524.037245989257,
   "end_elevation_m": 523.6726002474433,
   "start_xy": [
    715326.5517986058,
    4955775.942523927
   ],
   "end_xy": [
    715303.0956707663,
    4955784.576719179
   ]
  },
  "min_50m": {
   "gradient_pct": -0.2765982308205821,
   "start_distance_m": 373.0,
   "end_distance_m": 423.0,
   "midpoint_distance_m": 398.0,
   "start_elevation_m": 523.8412459903069,
   "end_elevation_m": 523.7029468748966,
   "start_xy": [
    715348.348753833,
    4955768.604252246
   ],
   "end_xy": [
    715301.1669818505,
    4955785.106019722
   ]
  },
  "min_100m": {
   "gradient_pct": 2.262145165892832,
   "start_distance_m": 49.0,
   "end_distance_m": 149.0,
   "midpoint_distance_m": 99.0,
   "start_elevation_m": 505.4245420623009,
   "end_elevation_m": 507.6866872281937,
   "start_xy": [
    715661.8501765842,
    4955726.648782621
   ],
   "end_xy": [
    715563.4245753853,
    4955716.465854537
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.41147018383367,
   "start_distance_m": 617.0,
   "end_distance_m": 619.0,
   "midpoint_distance_m": 618.0,
   "start_elevation_m": 541.9297803621554,
   "end_elevation_m": 542.3980097658321,
   "start_xy": [
    715123.4340832713,
    4955808.055793964
   ],
   "end_xy": [
    715121.4794877629,
    4955808.479534921
   ]
  },
  "max_3m": {
   "gradient_pct": 21.455472306577878,
   "start_distance_m": 525.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 526.5,
   "start_elevation_m": 529.3732394197474,
   "end_elevation_m": 530.0169035889447,
   "start_xy": [
    715199.849132672,
    4955794.5354225775
   ],
   "end_xy": [
    715196.8496709107,
    4955794.533287686
   ]
  }
 },
 "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": 0.008,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.182,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.216,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 20.0,
     "start_m": 538.0,
     "end_m": 558.0,
     "raw_pct": 15.72,
     "reason": "mask-edge"
    },
    {
     "window_m": 10.0,
     "start_m": 547.0,
     "end_m": 557.0,
     "raw_pct": 21.11,
     "reason": "mask-edge"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.683,
   "obstruction_max_height_m": 25.95,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    536.0,
    600.0
   ],
   [
    620.0,
    650.0
   ],
   [
    660.0,
    718.0
   ]
  ],
  "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_x71y496_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-15T06:41:10+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": "reline-campaign-260915",
  "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": [
   "x71y496"
  ],
  "climb_origin": "discovered",
  "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": 0.999,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Albany",
  "county": "Vermont"
 }
}