{
 "ocl_version": "0.1.0",
 "name": "Billy Goat Road",
 "slug": "billy-goat-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.561322793395334,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 451.0,
   "end_distance_m": 453.0,
   "start_elevation_m": 456.9751574311527,
   "end_elevation_m": 457.4463838870206,
   "min_gradient_pct": -8.059110176532158
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.353662800820985,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 449.0,
   "end_distance_m": 452.0,
   "start_elevation_m": 456.5159203260955,
   "end_elevation_m": 457.21653021012014,
   "min_gradient_pct": -7.960757085716826
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.94493288098579,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 448.0,
   "end_distance_m": 453.0,
   "start_elevation_m": 456.2991372429713,
   "end_elevation_m": 457.4463838870206,
   "min_gradient_pct": -7.450750719798407
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.27236568814874,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 444.0,
   "end_distance_m": 454.0,
   "start_elevation_m": 455.4278866647784,
   "end_elevation_m": 457.65512323359326,
   "min_gradient_pct": -6.626599422444315
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.789034673051674,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 435.0,
   "end_distance_m": 455.0,
   "start_elevation_m": 453.69225069817577,
   "end_elevation_m": 457.8500576327861,
   "min_gradient_pct": -4.847438042787644
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.194676948269034,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 430.0,
   "end_distance_m": 455.0,
   "start_elevation_m": 452.80138839571885,
   "end_elevation_m": 457.8500576327861,
   "min_gradient_pct": -4.119802428114099
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.072450065799444,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 434.0,
   "end_distance_m": 484.0,
   "start_elevation_m": 453.51229580689676,
   "end_elevation_m": 463.0485208397965,
   "min_gradient_pct": -1.958790987384532
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.087065022695242,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 410.0,
   "end_distance_m": 510.0,
   "start_elevation_m": 449.497383642718,
   "end_elevation_m": 467.5844486654132,
   "min_gradient_pct": 2.2250206473015055
  }
 ],
 "shape": {
  "ascent_concentration": 0.348,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 298.0,
  "shape_class": "sustained"
 },
 "length_m": 767.1079365831941,
 "start_elevation_m": 400.0765366516588,
 "end_elevation_m": 492.12949155987667,
 "endpoint_gain_m": 92.05295490821788,
 "overall_gradient_pct": 12.000000328276435,
 "accumulated_ascent_m": 93.15758127886727,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.94493288098579,
   "start_distance_m": 448.0,
   "end_distance_m": 453.0,
   "midpoint_distance_m": 450.5,
   "start_elevation_m": 456.2991372429713,
   "end_elevation_m": 457.4463838870206,
   "start_xy": [
    417966.80674449116,
    4633511.6137815025
   ],
   "end_xy": [
    417969.7397597151,
    4633507.564408502
   ]
  },
  "max_10m": {
   "gradient_pct": 22.27236568814874,
   "start_distance_m": 444.0,
   "end_distance_m": 454.0,
   "midpoint_distance_m": 449.0,
   "start_elevation_m": 455.4278866647784,
   "end_elevation_m": 457.65512323359326,
   "start_xy": [
    417964.49263201485,
    4633514.875118334
   ],
   "end_xy": [
    417970.3263627599,
    4633506.754533902
   ]
  },
  "max_20m": {
   "gradient_pct": 20.789034673051674,
   "start_distance_m": 435.0,
   "end_distance_m": 455.0,
   "midpoint_distance_m": 445.0,
   "start_elevation_m": 453.69225069817577,
   "end_elevation_m": 457.8500576327861,
   "start_xy": [
    417959.6953632655,
    4633522.489986195
   ],
   "end_xy": [
    417970.9129658047,
    4633505.944659302
   ]
  },
  "max_25m": {
   "gradient_pct": 20.194676948269034,
   "start_distance_m": 430.0,
   "end_distance_m": 455.0,
   "midpoint_distance_m": 442.5,
   "start_elevation_m": 452.80138839571885,
   "end_elevation_m": 457.8500576327861,
   "start_xy": [
    417957.0302139604,
    4633526.72046834
   ],
   "end_xy": [
    417970.9129658047,
    4633505.944659302
   ]
  },
  "max_50m": {
   "gradient_pct": 19.072450065799444,
   "start_distance_m": 434.0,
   "end_distance_m": 484.0,
   "midpoint_distance_m": 459.0,
   "start_elevation_m": 453.51229580689676,
   "end_elevation_m": 463.0485208397965,
   "start_xy": [
    417959.1623334045,
    4633523.336082624
   ],
   "end_xy": [
    417990.08938456076,
    4633484.229307327
   ]
  },
  "max_100m": {
   "gradient_pct": 18.087065022695242,
   "start_distance_m": 410.0,
   "end_distance_m": 510.0,
   "midpoint_distance_m": 460.0,
   "start_elevation_m": 449.497383642718,
   "end_elevation_m": 467.5844486654132,
   "start_xy": [
    417946.4082699286,
    4633543.666573771
   ],
   "end_xy": [
    418008.13440740446,
    4633465.510943335
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.450750719798407,
   "start_distance_m": 754.0,
   "end_distance_m": 759.0,
   "midpoint_distance_m": 756.5,
   "start_elevation_m": 492.58871000411733,
   "end_elevation_m": 492.2161724681274,
   "start_xy": [
    418098.2631490013,
    4633245.474189859
   ],
   "end_xy": [
    418101.3884380622,
    4633241.577028597
   ]
  },
  "min_10m": {
   "gradient_pct": -6.626599422444315,
   "start_distance_m": 750.0,
   "end_distance_m": 760.0,
   "midpoint_distance_m": 755.0,
   "start_elevation_m": 492.81666278430737,
   "end_elevation_m": 492.15400284206294,
   "start_xy": [
    418096.30770264013,
    4633248.963635307
   ],
   "end_xy": [
    418102.02245411364,
    4633240.80370871
   ]
  },
  "min_20m": {
   "gradient_pct": -4.847438042787644,
   "start_distance_m": 741.0,
   "end_distance_m": 761.0,
   "midpoint_distance_m": 751.0,
   "start_elevation_m": 493.07758901625976,
   "end_elevation_m": 492.10810140770224,
   "start_xy": [
    418092.3527165389,
    4633257.041640139
   ],
   "end_xy": [
    418102.65647016506,
    4633240.030388824
   ]
  },
  "min_25m": {
   "gradient_pct": -4.119802428114099,
   "start_distance_m": 737.0,
   "end_distance_m": 762.0,
   "midpoint_distance_m": 749.5,
   "start_elevation_m": 493.1225466095482,
   "end_elevation_m": 492.09259600251966,
   "start_xy": [
    418090.96132848854,
    4633260.782943829
   ],
   "end_xy": [
    418103.2904862165,
    4633239.257068938
   ]
  },
  "min_50m": {
   "gradient_pct": -1.958790987384532,
   "start_distance_m": 717.0,
   "end_distance_m": 767.0,
   "midpoint_distance_m": 742.0,
   "start_elevation_m": 493.11210530869164,
   "end_elevation_m": 492.1327098149994,
   "start_xy": [
    418085.9139375058,
    4633280.116843937
   ],
   "end_xy": [
    418106.4605664737,
    4633235.390469506
   ]
  },
  "min_100m": {
   "gradient_pct": 2.2250206473015055,
   "start_distance_m": 667.0,
   "end_distance_m": 767.0,
   "midpoint_distance_m": 717.0,
   "start_elevation_m": 489.90768916769787,
   "end_elevation_m": 492.1327098149994,
   "start_xy": [
    418078.5004943736,
    4633329.552782892
   ],
   "end_xy": [
    418106.4605664737,
    4633235.390469506
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.561322793395334,
   "start_distance_m": 451.0,
   "end_distance_m": 453.0,
   "midpoint_distance_m": 452.0,
   "start_elevation_m": 456.9751574311527,
   "end_elevation_m": 457.4463838870206,
   "start_xy": [
    417968.56655362557,
    4633509.184157702
   ],
   "end_xy": [
    417969.7397597151,
    4633507.564408502
   ]
  },
  "max_3m": {
   "gradient_pct": 23.353662800820985,
   "start_distance_m": 449.0,
   "end_distance_m": 452.0,
   "midpoint_distance_m": 450.5,
   "start_elevation_m": 456.5159203260955,
   "end_elevation_m": 457.21653021012014,
   "start_xy": [
    417967.393347536,
    4633510.803906902
   ],
   "end_xy": [
    417969.15315667033,
    4633508.374283102
   ]
  }
 },
 "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": {
  "review": [],
  "extent": [
   "may_start_earlier",
   "descends_at_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/pa/USGS_1M_18_x41y464_PA_Northcentral_2019_B19.tif"
  ],
  "calculated_at": "2026-09-07T12:05:54+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/pennsylvania-2026-09-07-batch-band4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "pa-run4-260907",
  "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, PA_Northcentral_2019_B19 (collected 2019)",
  "elevation_tile_ids": [
   "x41y464"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_Northcentral_2019_B19: HTTP Error 404: Not Found",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Forest Lake",
  "county": "Pennsylvania"
 }
}