{
 "ocl_version": "0.1.0",
 "name": "Hayden Road",
 "slug": "hayden-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.77692887854573,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 335.0,
   "end_distance_m": 337.0,
   "start_elevation_m": 354.74957511163564,
   "end_elevation_m": 355.44511368920655,
   "min_gradient_pct": -12.336770518436424
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.83583391311807,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 335.0,
   "end_distance_m": 338.0,
   "start_elevation_m": 354.74957511163564,
   "end_elevation_m": 355.7646501290292,
   "min_gradient_pct": -9.10036952249508
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 33.14269557537841,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 335.0,
   "end_distance_m": 340.0,
   "start_elevation_m": 354.74957511163564,
   "end_elevation_m": 356.40670989040456,
   "min_gradient_pct": -5.816748398807476
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.19484009082032,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 330.0,
   "end_distance_m": 340.0,
   "start_elevation_m": 353.5872258813225,
   "end_elevation_m": 356.40670989040456,
   "min_gradient_pct": -5.258138754898596
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.06442334400623,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 330.0,
   "end_distance_m": 350.0,
   "start_elevation_m": 353.5872258813225,
   "end_elevation_m": 358.40011055012377,
   "min_gradient_pct": -4.650513737699384
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.106099682378954,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 326.0,
   "end_distance_m": 351.0,
   "start_elevation_m": 352.8160671616057,
   "end_elevation_m": 358.59259208220044,
   "min_gradient_pct": -4.45888336101234
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.788626684489373,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 310.0,
   "end_distance_m": 360.0,
   "start_elevation_m": 350.25119544153006,
   "end_elevation_m": 360.14550878377474,
   "min_gradient_pct": -3.221275636049427
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.058676473933872,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 307.0,
   "end_distance_m": 407.0,
   "start_elevation_m": 349.8022239540708,
   "end_elevation_m": 366.8609004280047,
   "min_gradient_pct": -1.324919068751683
  }
 ],
 "shape": {
  "ascent_concentration": 0.484,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 121.0,
  "shape_class": "stepped"
 },
 "length_m": 1396.000000000186,
 "start_elevation_m": 320.52065374096316,
 "end_elevation_m": 397.59436605601127,
 "endpoint_gain_m": 77.07371231504811,
 "overall_gradient_pct": 5.521039564114459,
 "accumulated_ascent_m": 80.30793947105741,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 33.14269557537841,
   "start_distance_m": 335.0,
   "end_distance_m": 340.0,
   "midpoint_distance_m": 337.5,
   "start_elevation_m": 354.74957511163564,
   "end_elevation_m": 356.40670989040456,
   "start_xy": [
    703368.5881647619,
    4917888.585865974
   ],
   "end_xy": [
    703371.2554893197,
    4917884.356754991
   ]
  },
  "max_10m": {
   "gradient_pct": 28.19484009082032,
   "start_distance_m": 330.0,
   "end_distance_m": 340.0,
   "midpoint_distance_m": 335.0,
   "start_elevation_m": 353.5872258813225,
   "end_elevation_m": 356.40670989040456,
   "start_xy": [
    703365.9706611796,
    4917892.837211309
   ],
   "end_xy": [
    703371.2554893197,
    4917884.356754991
   ]
  },
  "max_20m": {
   "gradient_pct": 24.06442334400623,
   "start_distance_m": 330.0,
   "end_distance_m": 350.0,
   "midpoint_distance_m": 340.0,
   "start_elevation_m": 353.5872258813225,
   "end_elevation_m": 358.40011055012377,
   "start_xy": [
    703365.9706611796,
    4917892.837211309
   ],
   "end_xy": [
    703378.21854182,
    4917877.481353349
   ]
  },
  "max_25m": {
   "gradient_pct": 23.106099682378954,
   "start_distance_m": 326.0,
   "end_distance_m": 351.0,
   "midpoint_distance_m": 338.5,
   "start_elevation_m": 352.8160671616057,
   "end_elevation_m": 358.59259208220044,
   "start_xy": [
    703364.8774356537,
    4917896.684919451
   ],
   "end_xy": [
    703379.0488812939,
    4917876.9240954565
   ]
  },
  "max_50m": {
   "gradient_pct": 19.788626684489373,
   "start_distance_m": 310.0,
   "end_distance_m": 360.0,
   "midpoint_distance_m": 335.0,
   "start_elevation_m": 350.25119544153006,
   "end_elevation_m": 360.14550878377474,
   "start_xy": [
    703361.8565738032,
    4917912.22181129
   ],
   "end_xy": [
    703387.1079574616,
    4917873.505452861
   ]
  },
  "max_100m": {
   "gradient_pct": 17.058676473933872,
   "start_distance_m": 307.0,
   "end_distance_m": 407.0,
   "midpoint_distance_m": 357.0,
   "start_elevation_m": 349.8022239540708,
   "end_elevation_m": 366.8609004280047,
   "start_xy": [
    703362.0412739543,
    4917915.216120201
   ],
   "end_xy": [
    703433.5302974369,
    4917877.27823031
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.816748398807476,
   "start_distance_m": 919.0,
   "end_distance_m": 924.0,
   "midpoint_distance_m": 921.5,
   "start_elevation_m": 388.12893504898824,
   "end_elevation_m": 387.83809762904787,
   "start_xy": [
    703813.742138847,
    4918166.33509483
   ],
   "end_xy": [
    703816.4251735681,
    4918170.554256439
   ]
  },
  "min_10m": {
   "gradient_pct": -5.258138754898596,
   "start_distance_m": 918.0,
   "end_distance_m": 928.0,
   "midpoint_distance_m": 923.0,
   "start_elevation_m": 388.1759755004655,
   "end_elevation_m": 387.6501616249756,
   "start_xy": [
    703813.2055319027,
    4918165.491262509
   ],
   "end_xy": [
    703818.571601345,
    4918173.929585727
   ]
  },
  "min_20m": {
   "gradient_pct": -4.650513737699384,
   "start_distance_m": 912.0,
   "end_distance_m": 932.0,
   "midpoint_distance_m": 922.0,
   "start_elevation_m": 388.42062739112345,
   "end_elevation_m": 387.49052464358357,
   "start_xy": [
    703809.9858902375,
    4918160.428268577
   ],
   "end_xy": [
    703820.7180291219,
    4918177.304915015
   ]
  },
  "min_25m": {
   "gradient_pct": -4.45888336101234,
   "start_distance_m": 906.0,
   "end_distance_m": 931.0,
   "midpoint_distance_m": 918.5,
   "start_elevation_m": 388.6352494584364,
   "end_elevation_m": 387.52052861818333,
   "start_xy": [
    703806.7662485722,
    4918155.365274646
   ],
   "end_xy": [
    703820.1814221776,
    4918176.461082692
   ]
  },
  "min_50m": {
   "gradient_pct": -3.221275636049427,
   "start_distance_m": 903.0,
   "end_distance_m": 953.0,
   "midpoint_distance_m": 928.0,
   "start_elevation_m": 388.70939750038974,
   "end_elevation_m": 387.098759682365,
   "start_xy": [
    703805.1564277395,
    4918152.83377768
   ],
   "end_xy": [
    703831.9867749504,
    4918195.025393774
   ]
  },
  "min_100m": {
   "gradient_pct": -1.324919068751683,
   "start_distance_m": 865.0,
   "end_distance_m": 965.0,
   "midpoint_distance_m": 915.0,
   "start_elevation_m": 388.4031836852101,
   "end_elevation_m": 387.0782646164584,
   "start_xy": [
    703784.7653638592,
    4918120.7681494495
   ],
   "end_xy": [
    703837.9115134776,
    4918205.452145261
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.77692887854573,
   "start_distance_m": 335.0,
   "end_distance_m": 337.0,
   "midpoint_distance_m": 336.0,
   "start_elevation_m": 354.74957511163564,
   "end_elevation_m": 355.44511368920655,
   "start_xy": [
    703368.5881647619,
    4917888.585865974
   ],
   "end_xy": [
    703369.6550945849,
    4917886.8942215815
   ]
  },
  "max_3m": {
   "gradient_pct": 33.83583391311807,
   "start_distance_m": 335.0,
   "end_distance_m": 338.0,
   "midpoint_distance_m": 336.5,
   "start_elevation_m": 354.74957511163564,
   "end_elevation_m": 355.7646501290292,
   "start_xy": [
    703368.5881647619,
    4917888.585865974
   ],
   "end_xy": [
    703370.1885594965,
    4917886.048399385
   ]
  }
 },
 "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": 0.802,
   "obstruction_max_height_m": 28.27,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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_x70y492_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-04T21:31:50+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": [
   "x70y492"
  ],
  "route_summit_trim_m": 755.2,
  "route_summit_trim_loss_m": 21.1,
  "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": "Calais",
  "county": "Vermont"
 }
}