{
 "ocl_version": "0.1.0",
 "name": "Powder Mill Road",
 "slug": "powder-mill-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 31.449976334633334,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 315.0,
   "end_distance_m": 317.0,
   "start_elevation_m": 445.0556603635868,
   "end_elevation_m": 445.6846598902795,
   "min_gradient_pct": -25.30216575664781,
   "suppressed_max_gradient_pct": 47.43329413518609,
   "suppressed_location_m": [
    339.0,
    341.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.596100804472297,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 315.0,
   "end_distance_m": 318.0,
   "start_elevation_m": 445.0556603635868,
   "end_elevation_m": 445.943543387721,
   "min_gradient_pct": -20.832315415160945,
   "suppressed_max_gradient_pct": 44.14122968512402,
   "suppressed_location_m": [
    339.0,
    342.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.098997844591622,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 314.0,
   "end_distance_m": 319.0,
   "start_elevation_m": 444.82871897258275,
   "end_elevation_m": 446.23366886481233,
   "min_gradient_pct": -7.875633039412833,
   "suppressed_max_gradient_pct": 35.31489224530333,
   "suppressed_location_m": [
    338.0,
    343.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.567406072477638,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 310.0,
   "end_distance_m": 320.0,
   "start_elevation_m": 444.19272261201604,
   "end_elevation_m": 446.4494632192638,
   "min_gradient_pct": -2.273224538530485,
   "suppressed_max_gradient_pct": 25.825704335908313,
   "suppressed_location_m": [
    338.0,
    348.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.20572795128652,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 300.0,
   "end_distance_m": 320.0,
   "start_elevation_m": 442.2083176290065,
   "end_elevation_m": 446.4494632192638,
   "min_gradient_pct": 1.3346432679702502
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.274101785985977,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 295.0,
   "end_distance_m": 320.0,
   "start_elevation_m": 441.3809377727673,
   "end_elevation_m": 446.4494632192638,
   "min_gradient_pct": 1.3743323865344337
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.483516298781183,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 270.0,
   "end_distance_m": 320.0,
   "start_elevation_m": 437.2077050698732,
   "end_elevation_m": 446.4494632192638,
   "min_gradient_pct": 1.8097351957777619
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.934633852893057,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 235.0,
   "end_distance_m": 335.0,
   "start_elevation_m": 434.2276864485093,
   "end_elevation_m": 448.16232030140236,
   "min_gradient_pct": 2.114752464909259,
   "suppressed_max_gradient_pct": 15.37181518198048,
   "suppressed_location_m": [
    249.0,
    349.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.643,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 80.0,
  "shape_class": "stepped"
 },
 "length_m": 379.0000000000757,
 "start_elevation_m": 427.60339677246276,
 "end_elevation_m": 450.5819879620813,
 "endpoint_gain_m": 22.978591189618555,
 "overall_gradient_pct": 6.0629528204786185,
 "accumulated_ascent_m": 24.10125238803238,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.098997844591622,
   "start_distance_m": 314.0,
   "end_distance_m": 319.0,
   "midpoint_distance_m": 316.5,
   "start_elevation_m": 444.82871897258275,
   "end_elevation_m": 446.23366886481233,
   "start_xy": [
    647287.0311415441,
    4446190.645877016
   ],
   "end_xy": [
    647290.8050291586,
    4446187.365974593
   ]
  },
  "max_10m": {
   "gradient_pct": 22.567406072477638,
   "start_distance_m": 310.0,
   "end_distance_m": 320.0,
   "midpoint_distance_m": 315.0,
   "start_elevation_m": 444.19272261201604,
   "end_elevation_m": 446.4494632192638,
   "start_xy": [
    647284.0121168497,
    4446193.269898471
   ],
   "end_xy": [
    647291.558966961,
    4446186.709028789
   ]
  },
  "max_20m": {
   "gradient_pct": 21.20572795128652,
   "start_distance_m": 300.0,
   "end_distance_m": 320.0,
   "midpoint_distance_m": 310.0,
   "start_elevation_m": 442.2083176290065,
   "end_elevation_m": 446.4494632192638,
   "start_xy": [
    647276.4652667793,
    4446199.830768202
   ],
   "end_xy": [
    647291.558966961,
    4446186.709028789
   ]
  },
  "max_25m": {
   "gradient_pct": 20.274101785985977,
   "start_distance_m": 295.0,
   "end_distance_m": 320.0,
   "midpoint_distance_m": 307.5,
   "start_elevation_m": 441.3809377727673,
   "end_elevation_m": 446.4494632192638,
   "start_xy": [
    647272.6918086684,
    4446203.1111662425
   ],
   "end_xy": [
    647291.558966961,
    4446186.709028789
   ]
  },
  "max_50m": {
   "gradient_pct": 18.483516298781183,
   "start_distance_m": 270.0,
   "end_distance_m": 320.0,
   "midpoint_distance_m": 295.0,
   "start_elevation_m": 437.2077050698732,
   "end_elevation_m": 446.4494632192638,
   "start_xy": [
    647253.8242208776,
    4446219.512808085
   ],
   "end_xy": [
    647291.558966961,
    4446186.709028789
   ]
  },
  "max_100m": {
   "gradient_pct": 13.934633852893057,
   "start_distance_m": 235.0,
   "end_distance_m": 335.0,
   "midpoint_distance_m": 285.0,
   "start_elevation_m": 434.2276864485093,
   "end_elevation_m": 448.16232030140236,
   "start_xy": [
    647228.2101111205,
    4446243.2708693305
   ],
   "end_xy": [
    647302.8801995273,
    4446176.868826636
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.875633039412833,
   "start_distance_m": 333.0,
   "end_distance_m": 338.0,
   "midpoint_distance_m": 335.5,
   "start_elevation_m": 447.9311324909182,
   "end_elevation_m": 447.53735083894753,
   "start_xy": [
    647301.3699771502,
    4446178.1800199095
   ],
   "end_xy": [
    647305.1438647725,
    4446174.900117496
   ]
  },
  "min_10m": {
   "gradient_pct": -2.273224538530485,
   "start_distance_m": 369.0,
   "end_distance_m": 379.0,
   "midpoint_distance_m": 374.0,
   "start_elevation_m": 450.80931041593436,
   "end_elevation_m": 450.5819879620813,
   "start_xy": [
    647324.9306520968,
    4446151.895508796
   ],
   "end_xy": [
    647328.9266098567,
    4446142.7285984
   ]
  },
  "min_20m": {
   "gradient_pct": 1.3346432679702502,
   "start_distance_m": 158.0,
   "end_distance_m": 178.0,
   "midpoint_distance_m": 168.0,
   "start_elevation_m": 432.59865375459344,
   "end_elevation_m": 432.8655824081875,
   "start_xy": [
    647178.3258687367,
    4446301.927154356
   ],
   "end_xy": [
    647191.2830427982,
    4446286.691949672
   ]
  },
  "min_25m": {
   "gradient_pct": 1.3743323865344337,
   "start_distance_m": 158.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 170.5,
   "start_elevation_m": 432.59865375459344,
   "end_elevation_m": 432.94223685122705,
   "start_xy": [
    647178.3258687367,
    4446301.927154356
   ],
   "end_xy": [
    647194.5220682586,
    4446282.882919733
   ]
  },
  "min_50m": {
   "gradient_pct": 1.8097351957777619,
   "start_distance_m": 137.0,
   "end_distance_m": 187.0,
   "midpoint_distance_m": 162.0,
   "start_elevation_m": 432.15149232168545,
   "end_elevation_m": 433.05635991957433,
   "start_xy": [
    647164.7213665774,
    4446317.924567699
   ],
   "end_xy": [
    647197.1138507695,
    4446279.8361749835
   ]
  },
  "min_100m": {
   "gradient_pct": 2.114752464909259,
   "start_distance_m": 85.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 135.0,
   "start_elevation_m": 430.87408076982575,
   "end_elevation_m": 432.988833234735,
   "start_xy": [
    647133.8198997845,
    4446359.622153067
   ],
   "end_xy": [
    647195.8177133003,
    4446281.359337138
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 31.449976334633334,
   "start_distance_m": 315.0,
   "end_distance_m": 317.0,
   "midpoint_distance_m": 316.0,
   "start_elevation_m": 445.0556603635868,
   "end_elevation_m": 445.6846598902795,
   "start_xy": [
    647287.7860053037,
    4446189.989995392
   ],
   "end_xy": [
    647289.2948070264,
    4446188.677168149
   ]
  },
  "max_3m": {
   "gradient_pct": 29.596100804472297,
   "start_distance_m": 315.0,
   "end_distance_m": 318.0,
   "midpoint_distance_m": 316.5,
   "start_elevation_m": 445.0556603635868,
   "end_elevation_m": 445.943543387721,
   "start_xy": [
    647287.7860053037,
    4446189.989995392
   ],
   "end_xy": [
    647290.0501654348,
    4446188.021856258
   ]
  }
 },
 "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": {
  "texture_suppression": {
   "masked_fraction": 0.039,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 10.0,
     "start_m": 338.0,
     "end_m": 348.0,
     "raw_pct": 25.83,
     "reason": "short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 338.0,
     "end_m": 343.0,
     "raw_pct": 35.31,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "excluded_ranges_m": [
   [
    336.0,
    350.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "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:26917",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa-west/USGS_1M_17_x64y445_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-15T03:31:31+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/pennsylvania-2026-09-07.osm.pbf",
  "osm_snapshot": "2026-09-06T20:21:35Z",
  "run_id": "retro-260914",
  "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_WesternPA_2019_D20 (collected 2020)",
  "elevation_tile_ids": [
   "x64y445"
  ],
  "route_cut_m": 379.0,
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_WesternPA_2019_D20: HTTP Error 404: Not Found",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cook",
  "county": "Pennsylvania"
 }
}