{
 "ocl_version": "0.1.0",
 "name": "Dana Hill Road",
 "slug": "dana-hill-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.86070538514548,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 317.0,
   "end_distance_m": 319.0,
   "start_elevation_m": 306.9938342417524,
   "end_elevation_m": 307.8110483494553,
   "min_gradient_pct": -24.755167817093593
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.088268073100075,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 316.0,
   "end_distance_m": 319.0,
   "start_elevation_m": 306.6684003072623,
   "end_elevation_m": 307.8110483494553,
   "min_gradient_pct": -20.84798252723014
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 35.4783833868828,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 314.0,
   "end_distance_m": 319.0,
   "start_elevation_m": 306.03712918011115,
   "end_elevation_m": 307.8110483494553,
   "min_gradient_pct": -10.866068713359027
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.01225217644651,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 311.0,
   "end_distance_m": 321.0,
   "start_elevation_m": 305.38036606417586,
   "end_elevation_m": 308.2815912818205,
   "min_gradient_pct": 0.3853580110057919,
   "suppressed_max_gradient_pct": 29.237276612836354,
   "suppressed_location_m": [
    181.0,
    191.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.39189548188841,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 310.0,
   "end_distance_m": 330.0,
   "start_elevation_m": 305.21445990411956,
   "end_elevation_m": 309.89283900049725,
   "min_gradient_pct": 3.4078705465609005,
   "suppressed_max_gradient_pct": 27.726106952826797,
   "suppressed_location_m": [
    180.0,
    200.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.660201070794074,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 311.0,
   "end_distance_m": 336.0,
   "start_elevation_m": 305.38036606417586,
   "end_elevation_m": 311.0454163318744,
   "min_gradient_pct": 4.445927155927166,
   "suppressed_max_gradient_pct": 27.310215346725727,
   "suppressed_location_m": [
    180.0,
    205.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.217134372222063,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 250.0,
   "end_distance_m": 300.0,
   "start_elevation_m": 294.0392150402869,
   "end_elevation_m": 304.6477822263979,
   "min_gradient_pct": 6.386396962830872,
   "suppressed_max_gradient_pct": 24.179741029858178,
   "suppressed_location_m": [
    160.0,
    210.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.597257008255895,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 246.0,
   "end_distance_m": 346.0,
   "start_elevation_m": 293.24923479032543,
   "end_elevation_m": 311.8464917985813,
   "min_gradient_pct": 8.571528910546988,
   "suppressed_max_gradient_pct": 20.603287180045808,
   "suppressed_location_m": [
    179.0,
    279.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.332,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 197.0,
  "shape_class": "sustained"
 },
 "length_m": 626.7974039361582,
 "start_elevation_m": 249.1419053221875,
 "end_elevation_m": 344.76956965005564,
 "endpoint_gain_m": 95.62766432786813,
 "overall_gradient_pct": 15.25655079733039,
 "accumulated_ascent_m": 96.96798201396828,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 35.4783833868828,
   "start_distance_m": 314.0,
   "end_distance_m": 319.0,
   "midpoint_distance_m": 316.5,
   "start_elevation_m": 306.03712918011115,
   "end_elevation_m": 307.8110483494553,
   "start_xy": [
    672232.622061726,
    4893900.190942085
   ],
   "end_xy": [
    672234.4832398345,
    4893895.55090808
   ]
  },
  "max_10m": {
   "gradient_pct": 29.01225217644651,
   "start_distance_m": 311.0,
   "end_distance_m": 321.0,
   "midpoint_distance_m": 316.0,
   "start_elevation_m": 305.38036606417586,
   "end_elevation_m": 308.2815912818205,
   "start_xy": [
    672231.4587389551,
    4893902.956205206
   ],
   "end_xy": [
    672235.2006796502,
    4893893.684017587
   ]
  },
  "max_20m": {
   "gradient_pct": 23.39189548188841,
   "start_distance_m": 310.0,
   "end_distance_m": 330.0,
   "midpoint_distance_m": 320.0,
   "start_elevation_m": 305.21445990411956,
   "end_elevation_m": 309.89283900049725,
   "start_xy": [
    672231.0709646981,
    4893903.87795958
   ],
   "end_xy": [
    672238.4291588208,
    4893885.283010371
   ]
  },
  "max_25m": {
   "gradient_pct": 22.660201070794074,
   "start_distance_m": 311.0,
   "end_distance_m": 336.0,
   "midpoint_distance_m": 323.5,
   "start_elevation_m": 305.38036606417586,
   "end_elevation_m": 311.0454163318744,
   "start_xy": [
    672231.4587389551,
    4893902.956205206
   ],
   "end_xy": [
    672240.9164053953,
    4893879.829422349
   ]
  },
  "max_50m": {
   "gradient_pct": 21.217134372222063,
   "start_distance_m": 250.0,
   "end_distance_m": 300.0,
   "midpoint_distance_m": 275.0,
   "start_elevation_m": 294.0392150402869,
   "end_elevation_m": 304.6477822263979,
   "start_xy": [
    672235.8958447562,
    4893962.382240805
   ],
   "end_xy": [
    672227.3805503732,
    4893913.119832241
   ]
  },
  "max_100m": {
   "gradient_pct": 18.597257008255895,
   "start_distance_m": 246.0,
   "end_distance_m": 346.0,
   "midpoint_distance_m": 296.0,
   "start_elevation_m": 293.24923479032543,
   "end_elevation_m": 311.8464917985813,
   "start_xy": [
    672237.3307153804,
    4893966.074818934
   ],
   "end_xy": [
    672245.36210318,
    4893870.871980124
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.866068713359027,
   "start_distance_m": 337.0,
   "end_distance_m": 342.0,
   "midpoint_distance_m": 339.5,
   "start_elevation_m": 311.2135116332421,
   "end_elevation_m": 310.67020819757414,
   "start_xy": [
    672241.3609751737,
    4893878.933678127
   ],
   "end_xy": [
    672243.5838240661,
    4893874.454957015
   ]
  },
  "min_10m": {
   "gradient_pct": 0.3853580110057919,
   "start_distance_m": 402.0,
   "end_distance_m": 412.0,
   "midpoint_distance_m": 407.0,
   "start_elevation_m": 320.9313586707808,
   "end_elevation_m": 320.9698944718814,
   "start_xy": [
    672270.0659354668,
    4893820.616051294
   ],
   "end_xy": [
    672275.098698051,
    4893812.024209385
   ]
  },
  "min_20m": {
   "gradient_pct": 3.4078705465609005,
   "start_distance_m": 393.0,
   "end_distance_m": 413.0,
   "midpoint_distance_m": 403.0,
   "start_elevation_m": 320.38731531913686,
   "end_elevation_m": 321.06888942844904,
   "start_xy": [
    672266.1376803137,
    4893828.713508392
   ],
   "end_xy": [
    672275.6951449487,
    4893811.221556846
   ]
  },
  "min_25m": {
   "gradient_pct": 4.445927155927166,
   "start_distance_m": 396.0,
   "end_distance_m": 421.0,
   "midpoint_distance_m": 408.5,
   "start_elevation_m": 320.7606264384083,
   "end_elevation_m": 321.8721082273901,
   "start_xy": [
    672267.447098698,
    4893826.014356026
   ],
   "end_xy": [
    672280.4667201304,
    4893804.800336535
   ]
  },
  "min_50m": {
   "gradient_pct": 6.386396962830872,
   "start_distance_m": 395.0,
   "end_distance_m": 445.0,
   "midpoint_distance_m": 420.0,
   "start_elevation_m": 320.663050616539,
   "end_elevation_m": 323.85624909795445,
   "start_xy": [
    672267.0106259033,
    4893826.914073481
   ],
   "end_xy": [
    672294.7814456755,
    4893785.536675601
   ]
  },
  "min_100m": {
   "gradient_pct": 8.571528910546988,
   "start_distance_m": 392.0,
   "end_distance_m": 492.0,
   "midpoint_distance_m": 442.0,
   "start_elevation_m": 320.27459143680244,
   "end_elevation_m": 328.8461203473494,
   "start_xy": [
    672265.7012075188,
    4893829.6132258475
   ],
   "end_xy": [
    672320.9285417069,
    4893746.5313826585
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.86070538514548,
   "start_distance_m": 317.0,
   "end_distance_m": 319.0,
   "midpoint_distance_m": 318.0,
   "start_elevation_m": 306.9938342417524,
   "end_elevation_m": 307.8110483494553,
   "start_xy": [
    672233.7658000189,
    4893897.417798572
   ],
   "end_xy": [
    672234.4832398345,
    4893895.55090808
   ]
  },
  "max_3m": {
   "gradient_pct": 38.088268073100075,
   "start_distance_m": 316.0,
   "end_distance_m": 319.0,
   "midpoint_distance_m": 317.5,
   "start_elevation_m": 306.6684003072623,
   "end_elevation_m": 307.8110483494553,
   "start_xy": [
    672233.3976102399,
    4893898.347433337
   ],
   "end_xy": [
    672234.4832398345,
    4893895.55090808
   ]
  }
 },
 "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": 0.097,
   "windows_resited": [
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.898,
   "obstruction_max_height_m": 33.31,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    180.0,
    240.0
   ]
  ],
  "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_x67y490_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-04T21:22:35+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": [
   "x67y490"
  ],
  "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": "Waitsfield",
  "county": "Vermont"
 }
}