{
 "ocl_version": "0.1.0",
 "name": "Godfrey Road",
 "slug": "godfrey-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.49939427349591,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 983.0,
   "end_distance_m": 985.0,
   "start_elevation_m": 318.914247565836,
   "end_elevation_m": 319.6042354513059,
   "min_gradient_pct": -15.75023949288834
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.1395313010186,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 983.0,
   "end_distance_m": 986.0,
   "start_elevation_m": 318.914247565836,
   "end_elevation_m": 319.90843350486654,
   "min_gradient_pct": -15.623751151643242
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.031716788204903,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 981.0,
   "end_distance_m": 986.0,
   "start_elevation_m": 318.5068476654563,
   "end_elevation_m": 319.90843350486654,
   "min_gradient_pct": -15.55067641557116
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.613910945216162,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1089.0,
   "end_distance_m": 1099.0,
   "start_elevation_m": 338.54779312202817,
   "end_elevation_m": 341.0091842165498,
   "min_gradient_pct": -15.258046857516092
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.73199779880059,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1027.0,
   "end_distance_m": 1047.0,
   "start_elevation_m": 325.5094189522187,
   "end_elevation_m": 330.0558185119788,
   "min_gradient_pct": -14.261425835250066
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.157736185972,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1024.0,
   "end_distance_m": 1049.0,
   "start_elevation_m": 324.9245961759511,
   "end_elevation_m": 330.4640302224441,
   "min_gradient_pct": -13.847839903173053
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.248972286087564,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1029.0,
   "end_distance_m": 1079.0,
   "start_elevation_m": 325.9193687874708,
   "end_elevation_m": 336.54385493051456,
   "min_gradient_pct": -12.518688881478283
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.94184974624261,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1022.0,
   "end_distance_m": 1122.0,
   "start_elevation_m": 324.54122185462643,
   "end_elevation_m": 345.48307160086904,
   "min_gradient_pct": -10.872104851295717
  }
 ],
 "shape": {
  "ascent_concentration": 0.403,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 174.0,
  "shape_class": "sustained"
 },
 "length_m": 1586.6988175361641,
 "start_elevation_m": 269.65861680602717,
 "end_elevation_m": 393.8371674069209,
 "endpoint_gain_m": 124.17855060089374,
 "overall_gradient_pct": 7.82622065564522,
 "accumulated_ascent_m": 140.62293785210557,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.031716788204903,
   "start_distance_m": 981.0,
   "end_distance_m": 986.0,
   "midpoint_distance_m": 983.5,
   "start_elevation_m": 318.5068476654563,
   "end_elevation_m": 319.90843350486654,
   "start_xy": [
    723778.5383872828,
    4868382.836047286
   ],
   "end_xy": [
    723776.5109638638,
    4868387.406556479
   ]
  },
  "max_10m": {
   "gradient_pct": 24.613910945216162,
   "start_distance_m": 1089.0,
   "end_distance_m": 1099.0,
   "midpoint_distance_m": 1094.0,
   "start_elevation_m": 338.54779312202817,
   "end_elevation_m": 341.0091842165498,
   "start_xy": [
    723691.1074232166,
    4868430.108261687
   ],
   "end_xy": [
    723681.8791350208,
    4868433.960364616
   ]
  },
  "max_20m": {
   "gradient_pct": 22.73199779880059,
   "start_distance_m": 1027.0,
   "end_distance_m": 1047.0,
   "midpoint_distance_m": 1037.0,
   "start_elevation_m": 325.5094189522187,
   "end_elevation_m": 330.0558185119788,
   "start_xy": [
    723751.045610995,
    4868415.043075145
   ],
   "end_xy": [
    723731.3554371622,
    4868418.414958301
   ]
  },
  "max_25m": {
   "gradient_pct": 22.157736185972,
   "start_distance_m": 1024.0,
   "end_distance_m": 1049.0,
   "midpoint_distance_m": 1036.5,
   "start_elevation_m": 324.9245961759511,
   "end_elevation_m": 330.4640302224441,
   "start_xy": [
    723754.0166339459,
    4868414.62711526
   ],
   "end_xy": [
    723729.415486826,
    4868418.90136625
   ]
  },
  "max_50m": {
   "gradient_pct": 21.248972286087564,
   "start_distance_m": 1029.0,
   "end_distance_m": 1079.0,
   "midpoint_distance_m": 1054.0,
   "start_elevation_m": 325.9193687874708,
   "end_elevation_m": 336.54385493051456,
   "start_xy": [
    723749.0649290279,
    4868415.3203817345
   ],
   "end_xy": [
    723700.3357114125,
    4868426.256158758
   ]
  },
  "max_100m": {
   "gradient_pct": 20.94184974624261,
   "start_distance_m": 1022.0,
   "end_distance_m": 1122.0,
   "midpoint_distance_m": 1072.0,
   "start_elevation_m": 324.54122185462643,
   "end_elevation_m": 345.48307160086904,
   "start_xy": [
    723755.9973159131,
    4868414.349808671
   ],
   "end_xy": [
    723677.247479995,
    4868454.279068852
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -15.55067641557116,
   "start_distance_m": 6.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 8.5,
   "start_elevation_m": 268.9902985885813,
   "end_elevation_m": 268.21276476780275,
   "start_xy": [
    724352.7328733267,
    4867766.724945953
   ],
   "end_xy": [
    724348.0352677656,
    4867768.437400914
   ]
  },
  "min_10m": {
   "gradient_pct": -15.258046857516092,
   "start_distance_m": 5.0,
   "end_distance_m": 15.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 269.1379009692959,
   "end_elevation_m": 267.6120962835443,
   "start_xy": [
    724353.6723944389,
    4867766.382454961
   ],
   "end_xy": [
    724344.2771833168,
    4867769.807364882
   ]
  },
  "min_20m": {
   "gradient_pct": -14.261425835250066,
   "start_distance_m": 2.0,
   "end_distance_m": 22.0,
   "midpoint_distance_m": 12.0,
   "start_elevation_m": 269.55033230779526,
   "end_elevation_m": 266.69804714074525,
   "start_xy": [
    724356.4909577756,
    4867765.354981984
   ],
   "end_xy": [
    724337.6225139087,
    4867771.967877613
   ]
  },
  "min_25m": {
   "gradient_pct": -13.847839903173053,
   "start_distance_m": 3.0,
   "end_distance_m": 28.0,
   "midpoint_distance_m": 15.5,
   "start_elevation_m": 269.43717051261785,
   "end_elevation_m": 265.9752105368246,
   "start_xy": [
    724355.5514366634,
    4867765.6974729765
   ],
   "end_xy": [
    724331.8514543528,
    4867773.591014859
   ]
  },
  "min_50m": {
   "gradient_pct": -12.518688881478283,
   "start_distance_m": 2.0,
   "end_distance_m": 52.0,
   "midpoint_distance_m": 27.0,
   "start_elevation_m": 269.55033230779526,
   "end_elevation_m": 263.2909878670561,
   "start_xy": [
    724356.4909577756,
    4867765.354981984
   ],
   "end_xy": [
    724308.0447498015,
    4867776.608517492
   ]
  },
  "min_100m": {
   "gradient_pct": -10.872104851295717,
   "start_distance_m": 1.0,
   "end_distance_m": 101.0,
   "midpoint_distance_m": 51.0,
   "start_elevation_m": 269.6150638154717,
   "end_elevation_m": 258.74295896417595,
   "start_xy": [
    724357.4304788877,
    4867765.012490992
   ],
   "end_xy": [
    724259.8273991398,
    4867784.4299036525
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.49939427349591,
   "start_distance_m": 983.0,
   "end_distance_m": 985.0,
   "midpoint_distance_m": 984.0,
   "start_elevation_m": 318.914247565836,
   "end_elevation_m": 319.6042354513059,
   "start_xy": [
    723777.7274179152,
    4868384.664250963
   ],
   "end_xy": [
    723776.9164485476,
    4868386.492454641
   ]
  },
  "max_3m": {
   "gradient_pct": 33.1395313010186,
   "start_distance_m": 983.0,
   "end_distance_m": 986.0,
   "midpoint_distance_m": 984.5,
   "start_elevation_m": 318.914247565836,
   "end_elevation_m": 319.90843350486654,
   "start_xy": [
    723777.7274179152,
    4868384.664250963
   ],
   "end_xy": [
    723776.5109638638,
    4868387.406556479
   ]
  }
 },
 "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": 0.351,
   "obstruction_max_height_m": 29.41,
   "flagged_windows_m": [
    2,
    3,
    5,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "descends_at_start",
   "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_x72y487_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-04T21:36:37+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": [
   "x72y487"
  ],
  "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": "West Fairlee",
  "county": "Vermont"
 }
}