{
 "ocl_version": "0.1.0",
 "name": "Nicholette Road",
 "slug": "nicholette-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.747927513818695,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 168.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 297.8623409586383,
   "end_elevation_m": 298.4572995089147,
   "min_gradient_pct": 2.365159928194771
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.08965162091681,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 311.0,
   "end_distance_m": 314.0,
   "start_elevation_m": 320.73912539501725,
   "end_elevation_m": 321.58181494364476,
   "min_gradient_pct": 2.8098726134601293
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.172867521805983,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 309.0,
   "end_distance_m": 314.0,
   "start_elevation_m": 320.22317156755446,
   "end_elevation_m": 321.58181494364476,
   "min_gradient_pct": 4.201064560368195
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.374483989708438,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 146.0,
   "end_distance_m": 156.0,
   "start_elevation_m": 293.05908440357473,
   "end_elevation_m": 295.4965328025456,
   "min_gradient_pct": 5.574724342056925
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.682029748180526,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 150.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 293.92089355927857,
   "end_elevation_m": 298.4572995089147,
   "min_gradient_pct": 7.389437897140851
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.59920310740199,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 148.0,
   "end_distance_m": 173.0,
   "start_elevation_m": 293.43621304006683,
   "end_elevation_m": 299.08601381691733,
   "min_gradient_pct": 8.524105263586534
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.047943416781095,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 139.0,
   "end_distance_m": 189.0,
   "start_elevation_m": 291.8470857308041,
   "end_elevation_m": 301.87105743919466,
   "min_gradient_pct": 11.57879683552801
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.892937151274168,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 123.0,
   "end_distance_m": 223.0,
   "start_elevation_m": 289.51215809213176,
   "end_elevation_m": 307.4050952434059,
   "min_gradient_pct": 12.971268763502053
  }
 ],
 "shape": {
  "ascent_concentration": 0.3,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 337.0,
  "shape_class": "sustained"
 },
 "length_m": 356.50939924708723,
 "start_elevation_m": 273.3513572002686,
 "end_elevation_m": 327.80264933841966,
 "endpoint_gain_m": 54.451292138151075,
 "overall_gradient_pct": 15.273452047308387,
 "accumulated_ascent_m": 54.451292138151075,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.172867521805983,
   "start_distance_m": 309.0,
   "end_distance_m": 314.0,
   "midpoint_distance_m": 311.5,
   "start_elevation_m": 320.22317156755446,
   "end_elevation_m": 321.58181494364476,
   "start_xy": [
    702332.9175933162,
    4872278.8560637655
   ],
   "end_xy": [
    702333.0760400901,
    4872283.853552597
   ]
  },
  "max_10m": {
   "gradient_pct": 24.374483989708438,
   "start_distance_m": 146.0,
   "end_distance_m": 156.0,
   "midpoint_distance_m": 151.0,
   "start_elevation_m": 293.05908440357473,
   "end_elevation_m": 295.4965328025456,
   "start_xy": [
    702222.8691675337,
    4872178.863025804
   ],
   "end_xy": [
    702231.7716560116,
    4872183.29294065
   ]
  },
  "max_20m": {
   "gradient_pct": 22.682029748180526,
   "start_distance_m": 150.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 160.0,
   "start_elevation_m": 293.92089355927857,
   "end_elevation_m": 298.4572995089147,
   "start_xy": [
    702226.6430861743,
    4872180.18874753
   ],
   "end_xy": [
    702241.9949338936,
    4872192.573723325
   ]
  },
  "max_25m": {
   "gradient_pct": 22.59920310740199,
   "start_distance_m": 148.0,
   "end_distance_m": 173.0,
   "midpoint_distance_m": 160.5,
   "start_elevation_m": 293.43621304006683,
   "end_elevation_m": 299.08601381691733,
   "start_xy": [
    702224.756126854,
    4872179.525886667
   ],
   "end_xy": [
    702243.8914922583,
    4872194.898173016
   ]
  },
  "max_50m": {
   "gradient_pct": 20.047943416781095,
   "start_distance_m": 139.0,
   "end_distance_m": 189.0,
   "midpoint_distance_m": 164.0,
   "start_elevation_m": 291.8470857308041,
   "end_elevation_m": 301.87105743919466,
   "start_xy": [
    702216.2648099125,
    4872176.543012784
   ],
   "end_xy": [
    702252.552484447,
    4872208.32296382
   ]
  },
  "max_100m": {
   "gradient_pct": 17.892937151274168,
   "start_distance_m": 123.0,
   "end_distance_m": 223.0,
   "midpoint_distance_m": 173.0,
   "start_elevation_m": 289.51215809213176,
   "end_elevation_m": 307.4050952434059,
   "start_xy": [
    702202.0624214617,
    4872169.491779866
   ],
   "end_xy": [
    702279.5128556286,
    4872227.705165783
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 4.201064560368195,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 273.3513572002686,
   "end_elevation_m": 273.561410428287,
   "start_xy": [
    702125.589,
    4872073.667
   ],
   "end_xy": [
    702128.3796877654,
    4872077.815742195
   ]
  },
  "min_10m": {
   "gradient_pct": 5.574724342056925,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 273.3513572002686,
   "end_elevation_m": 273.9088296344743,
   "start_xy": [
    702125.589,
    4872073.667
   ],
   "end_xy": [
    702131.1703755308,
    4872081.964484389
   ]
  },
  "min_20m": {
   "gradient_pct": 7.389437897140851,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 273.3513572002686,
   "end_elevation_m": 274.82924477969675,
   "start_xy": [
    702125.589,
    4872073.667
   ],
   "end_xy": [
    702136.7517510615,
    4872090.261968778
   ]
  },
  "min_25m": {
   "gradient_pct": 8.524105263586534,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 273.3513572002686,
   "end_elevation_m": 275.4823835161652,
   "start_xy": [
    702125.589,
    4872073.667
   ],
   "end_xy": [
    702139.596402077,
    4872094.372434587
   ]
  },
  "min_50m": {
   "gradient_pct": 11.57879683552801,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 273.3513572002686,
   "end_elevation_m": 279.1407556180326,
   "start_xy": [
    702125.589,
    4872073.667
   ],
   "end_xy": [
    702154.5613046825,
    4872114.398709578
   ]
  },
  "min_100m": {
   "gradient_pct": 12.971268763502053,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 273.3513572002686,
   "end_elevation_m": 286.32262596377063,
   "start_xy": [
    702125.589,
    4872073.667
   ],
   "end_xy": [
    702185.3670314358,
    4872153.672046876
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.747927513818695,
   "start_distance_m": 168.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 169.0,
   "start_elevation_m": 297.8623409586383,
   "end_elevation_m": 298.4572995089147,
   "start_xy": [
    702240.7305616504,
    4872191.024090196
   ],
   "end_xy": [
    702241.9949338936,
    4872192.573723325
   ]
  },
  "max_3m": {
   "gradient_pct": 28.08965162091681,
   "start_distance_m": 311.0,
   "end_distance_m": 314.0,
   "midpoint_distance_m": 312.5,
   "start_elevation_m": 320.73912539501725,
   "end_elevation_m": 321.58181494364476,
   "start_xy": [
    702332.9809720258,
    4872280.855059298
   ],
   "end_xy": [
    702333.0760400901,
    4872283.853552597
   ]
  }
 },
 "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": 0.461,
   "obstruction_max_height_m": 26.52,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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_x70y488_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-04T21:26:38+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": "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": [
   "x70y488"
  ],
  "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"
 }
}