{
 "ocl_version": "0.1.0",
 "name": "Fraction Road",
 "slug": "fraction-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.80041259507891,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 207.0,
   "end_distance_m": 209.0,
   "start_elevation_m": 267.8116717325138,
   "end_elevation_m": 268.48767998441537,
   "min_gradient_pct": -96.53123018109397,
   "suppressed_max_gradient_pct": 106.62823235755639,
   "suppressed_location_m": [
    175.0,
    177.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.68348473664931,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 207.0,
   "end_distance_m": 210.0,
   "start_elevation_m": 267.8116717325138,
   "end_elevation_m": 268.73217627461327,
   "min_gradient_pct": -78.76660746601374,
   "suppressed_max_gradient_pct": 81.1039893225787,
   "suppressed_location_m": [
    175.0,
    178.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.21392653856583,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 901.0,
   "end_distance_m": 906.0,
   "start_elevation_m": 342.3504832247289,
   "end_elevation_m": 343.7111795516572,
   "min_gradient_pct": -48.61465017917112,
   "suppressed_max_gradient_pct": 55.62758326151538,
   "suppressed_location_m": [
    174.0,
    179.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.39959320212199,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 900.0,
   "end_distance_m": 910.0,
   "start_elevation_m": 342.1427770373437,
   "end_elevation_m": 344.2827363575559,
   "min_gradient_pct": -24.372574625805896,
   "suppressed_max_gradient_pct": 31.24654165667266,
   "suppressed_location_m": [
    174.0,
    184.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 14.962885054781339,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 505.0,
   "end_distance_m": 525.0,
   "start_elevation_m": 299.05031646867985,
   "end_elevation_m": 302.0428934796361,
   "min_gradient_pct": -10.833890501727979,
   "suppressed_max_gradient_pct": 22.718809201176384,
   "suppressed_location_m": [
    923.0,
    943.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 14.987503006827865,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 505.0,
   "end_distance_m": 530.0,
   "start_elevation_m": 299.05031646867985,
   "end_elevation_m": 302.7971922203868,
   "min_gradient_pct": -8.026611413567935,
   "suppressed_max_gradient_pct": 20.7830852861091,
   "suppressed_location_m": [
    923.0,
    948.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 13.758502595731557,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 504.0,
   "end_distance_m": 554.0,
   "start_elevation_m": 298.9309304902359,
   "end_elevation_m": 305.81018178810166,
   "min_gradient_pct": -5.811736596498122,
   "suppressed_max_gradient_pct": 16.29198331364205,
   "suppressed_location_m": [
    756.0,
    806.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.908617194490319,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 443.0,
   "end_distance_m": 543.0,
   "start_elevation_m": 291.6677756221169,
   "end_elevation_m": 304.5763928166072,
   "min_gradient_pct": -4.204756789538578,
   "suppressed_max_gradient_pct": 13.266091114806784,
   "suppressed_location_m": [
    868.0,
    968.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.455,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 93.0,
  "shape_class": "stepped"
 },
 "length_m": 2822.5348385742236,
 "start_elevation_m": 260.81861787976993,
 "end_elevation_m": 420.4181608361781,
 "endpoint_gain_m": 159.5995429564082,
 "overall_gradient_pct": 5.654475571930527,
 "accumulated_ascent_m": 175.95457501689714,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.21392653856583,
   "start_distance_m": 901.0,
   "end_distance_m": 906.0,
   "midpoint_distance_m": 903.5,
   "start_elevation_m": 342.3504832247289,
   "end_elevation_m": 343.7111795516572,
   "start_xy": [
    541510.0682273946,
    4424816.370417345
   ],
   "end_xy": [
    541512.0589150444,
    4424820.957045467
   ]
  },
  "max_10m": {
   "gradient_pct": 21.39959320212199,
   "start_distance_m": 900.0,
   "end_distance_m": 910.0,
   "midpoint_distance_m": 905.0,
   "start_elevation_m": 342.1427770373437,
   "end_elevation_m": 344.2827363575559,
   "start_xy": [
    541509.6702695783,
    4424815.453013752
   ],
   "end_xy": [
    541513.6511128594,
    4424824.626501236
   ]
  },
  "max_20m": {
   "gradient_pct": 14.962885054781339,
   "start_distance_m": 505.0,
   "end_distance_m": 525.0,
   "midpoint_distance_m": 515.0,
   "start_elevation_m": 299.05031646867985,
   "end_elevation_m": 302.0428934796361,
   "start_xy": [
    541311.6982167361,
    4424483.67693096
   ],
   "end_xy": [
    541325.6265067997,
    4424497.966302452
   ]
  },
  "max_25m": {
   "gradient_pct": 14.987503006827865,
   "start_distance_m": 505.0,
   "end_distance_m": 530.0,
   "midpoint_distance_m": 517.5,
   "start_elevation_m": 299.05031646867985,
   "end_elevation_m": 302.7971922203868,
   "start_xy": [
    541311.6982167361,
    4424483.67693096
   ],
   "end_xy": [
    541329.2039300421,
    4424501.459442974
   ]
  },
  "max_50m": {
   "gradient_pct": 13.758502595731557,
   "start_distance_m": 504.0,
   "end_distance_m": 554.0,
   "midpoint_distance_m": 529.0,
   "start_elevation_m": 298.9309304902359,
   "end_elevation_m": 305.81018178810166,
   "start_xy": [
    541311.1603961986,
    4424482.833871739
   ],
   "end_xy": [
    541346.3771987156,
    4424518.224843439
   ]
  },
  "max_100m": {
   "gradient_pct": 12.908617194490319,
   "start_distance_m": 443.0,
   "end_distance_m": 543.0,
   "midpoint_distance_m": 493.0,
   "start_elevation_m": 291.6677756221169,
   "end_elevation_m": 304.5763928166072,
   "start_xy": [
    541279.3135261739,
    4424430.83819996
   ],
   "end_xy": [
    541338.5060858527,
    4424510.540733255
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -48.61465017917112,
   "start_distance_m": 168.0,
   "end_distance_m": 173.0,
   "midpoint_distance_m": 170.5,
   "start_elevation_m": 265.07587235610015,
   "end_elevation_m": 262.6451398471416,
   "start_xy": [
    541156.5978009354,
    4424209.848426033
   ],
   "end_xy": [
    541161.5258804997,
    4424209.003422106
   ]
  },
  "min_10m": {
   "gradient_pct": -24.372574625805896,
   "start_distance_m": 163.0,
   "end_distance_m": 173.0,
   "midpoint_distance_m": 168.0,
   "start_elevation_m": 265.0823973097222,
   "end_elevation_m": 262.6451398471416,
   "start_xy": [
    541151.7723546219,
    4424209.674080014
   ],
   "end_xy": [
    541161.5258804997,
    4424209.003422106
   ]
  },
  "min_20m": {
   "gradient_pct": -10.833890501727979,
   "start_distance_m": 153.0,
   "end_distance_m": 173.0,
   "midpoint_distance_m": 163.0,
   "start_elevation_m": 264.8119179474872,
   "end_elevation_m": 262.6451398471416,
   "start_xy": [
    541145.571276505,
    4424202.600796008
   ],
   "end_xy": [
    541161.5258804997,
    4424209.003422106
   ]
  },
  "min_25m": {
   "gradient_pct": -8.026611413567935,
   "start_distance_m": 148.0,
   "end_distance_m": 173.0,
   "midpoint_distance_m": 160.5,
   "start_elevation_m": 264.6517927005336,
   "end_elevation_m": 262.6451398471416,
   "start_xy": [
    541143.454410026,
    4424198.071020056
   ],
   "end_xy": [
    541161.5258804997,
    4424209.003422106
   ]
  },
  "min_50m": {
   "gradient_pct": -5.811736596498122,
   "start_distance_m": 1834.0,
   "end_distance_m": 1884.0,
   "midpoint_distance_m": 1859.0,
   "start_elevation_m": 398.145695195797,
   "end_elevation_m": 395.2398268975479,
   "start_xy": [
    541638.0792796542,
    4425516.200232015
   ],
   "end_xy": [
    541641.2303842276,
    4425565.8812822625
   ]
  },
  "min_100m": {
   "gradient_pct": -4.204756789538578,
   "start_distance_m": 1827.0,
   "end_distance_m": 1927.0,
   "midpoint_distance_m": 1877.0,
   "start_elevation_m": 398.31655864673087,
   "end_elevation_m": 394.1118018571923,
   "start_xy": [
    541639.4652313828,
    4425509.338808149
   ],
   "end_xy": [
    541645.0247170563,
    4425608.680914865
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.80041259507891,
   "start_distance_m": 207.0,
   "end_distance_m": 209.0,
   "midpoint_distance_m": 208.0,
   "start_elevation_m": 267.8116717325138,
   "end_elevation_m": 268.48767998441537,
   "start_xy": [
    541192.3947331684,
    4424213.936178289
   ],
   "end_xy": [
    541193.6236524683,
    4424215.514074589
   ]
  },
  "max_3m": {
   "gradient_pct": 30.68348473664931,
   "start_distance_m": 207.0,
   "end_distance_m": 210.0,
   "midpoint_distance_m": 208.5,
   "start_elevation_m": 267.8116717325138,
   "end_elevation_m": 268.73217627461327,
   "start_xy": [
    541192.3947331684,
    4424213.936178289
   ],
   "end_xy": [
    541194.237800803,
    4424216.303265202
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.004,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.018,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 923.0,
     "end_m": 948.0,
     "raw_pct": 20.78,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 923.0,
     "end_m": 943.0,
     "raw_pct": 22.72,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 925.0,
     "end_m": 935.0,
     "raw_pct": 30.47,
     "reason": "hump"
    },
    {
     "window_m": 5.0,
     "start_m": 759.0,
     "end_m": 764.0,
     "raw_pct": 42.37,
     "reason": "hump+short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "excluded_ranges_m": [
   [
    168.0,
    179.0
   ],
   [
    757.0,
    766.0
   ],
   [
    921.0,
    950.0
   ]
  ],
  "review": [],
  "extent": [
   "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:26917",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa-west/USGS_1M_17_x54y443_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-12T00:02:14+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-us-pa/batch-usa-rchunk00.pbf",
  "osm_snapshot": "",
  "run_id": "texture-us-pa-260911",
  "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": [
   "x54y443"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_WesternPA_2019_D20: HTTP Error 404: Not Found",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "West Finley",
  "county": "Pennsylvania"
 }
}