{
 "ocl_version": "0.1.0",
 "name": "Harvard Road",
 "slug": "harvard-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.14235731404517,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 268.0,
   "end_distance_m": 270.0,
   "start_elevation_m": 287.2604320554521,
   "end_elevation_m": 287.743279201733,
   "min_gradient_pct": -3.800499702572324,
   "suppressed_max_gradient_pct": 28.436057340209686,
   "suppressed_location_m": [
    5.0,
    7.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.192101264470466,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 268.0,
   "end_distance_m": 271.0,
   "start_elevation_m": 287.2604320554521,
   "end_elevation_m": 287.9561950933862,
   "min_gradient_pct": -3.044220796374475,
   "suppressed_max_gradient_pct": 27.245991722571716,
   "suppressed_location_m": [
    5.0,
    8.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 19.0863968262056,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 234.0,
   "end_distance_m": 239.0,
   "start_elevation_m": 283.6213916225753,
   "end_elevation_m": 284.57571146388557,
   "min_gradient_pct": -2.246549926882153,
   "suppressed_max_gradient_pct": 25.800561905050472,
   "suppressed_location_m": [
    5.0,
    10.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 18.0857642298173,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 532.0,
   "end_distance_m": 542.0,
   "start_elevation_m": 316.9999605455284,
   "end_elevation_m": 318.8085369685101,
   "min_gradient_pct": -2.004297803841837,
   "suppressed_max_gradient_pct": 24.051121246075127,
   "suppressed_location_m": [
    4.0,
    14.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 17.58500146650391,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 531.0,
   "end_distance_m": 551.0,
   "start_elevation_m": 316.83258928667624,
   "end_elevation_m": 320.349589579977,
   "min_gradient_pct": -1.7802550329730593,
   "suppressed_max_gradient_pct": 23.292726737995224,
   "suppressed_location_m": [
    27.0,
    47.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 17.39731385625487,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 528.0,
   "end_distance_m": 553.0,
   "start_elevation_m": 316.32989273336034,
   "end_elevation_m": 320.67922119742406,
   "min_gradient_pct": -1.5695533324201278,
   "suppressed_max_gradient_pct": 23.07148921906878,
   "suppressed_location_m": [
    23.0,
    48.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.057681392043605,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 528.0,
   "end_distance_m": 578.0,
   "start_elevation_m": 316.32989273336034,
   "end_elevation_m": 324.85873342938214,
   "min_gradient_pct": -1.3350905332849834,
   "suppressed_max_gradient_pct": 22.336156070301513,
   "suppressed_location_m": [
    0.0,
    50.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.528410590739554,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 496.0,
   "end_distance_m": 596.0,
   "start_elevation_m": 311.216159221667,
   "end_elevation_m": 327.74456981240655,
   "min_gradient_pct": -1.0693532257078004
  }
 ],
 "shape": {
  "ascent_concentration": 0.355,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 186.0,
  "shape_class": "sustained"
 },
 "length_m": 758.7331299785548,
 "start_elevation_m": 265.94867081604167,
 "end_elevation_m": 344.33649258740655,
 "endpoint_gain_m": 78.38782177136488,
 "overall_gradient_pct": 10.33140885433334,
 "accumulated_ascent_m": 79.79821126664757,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 19.0863968262056,
   "start_distance_m": 234.0,
   "end_distance_m": 239.0,
   "midpoint_distance_m": 236.5,
   "start_elevation_m": 283.6213916225753,
   "end_elevation_m": 284.57571146388557,
   "start_xy": [
    577677.0797060943,
    4476217.909297677
   ],
   "end_xy": [
    577673.4813070917,
    4476214.437768329
   ]
  },
  "max_10m": {
   "gradient_pct": 18.0857642298173,
   "start_distance_m": 532.0,
   "end_distance_m": 542.0,
   "midpoint_distance_m": 537.0,
   "start_elevation_m": 316.9999605455284,
   "end_elevation_m": 318.8085369685101,
   "start_xy": [
    577461.7623643794,
    4476331.392632776
   ],
   "end_xy": [
    577452.9367340157,
    4476336.094572577
   ]
  },
  "max_20m": {
   "gradient_pct": 17.58500146650391,
   "start_distance_m": 531.0,
   "end_distance_m": 551.0,
   "midpoint_distance_m": 541.0,
   "start_elevation_m": 316.83258928667624,
   "end_elevation_m": 320.349589579977,
   "start_xy": [
    577462.6447961527,
    4476330.922192539
   ],
   "end_xy": [
    577444.7793315828,
    4476339.733133641
   ]
  },
  "max_25m": {
   "gradient_pct": 17.39731385625487,
   "start_distance_m": 528.0,
   "end_distance_m": 553.0,
   "midpoint_distance_m": 540.5,
   "start_elevation_m": 316.32989273336034,
   "end_elevation_m": 320.67922119742406,
   "start_xy": [
    577465.2925245336,
    4476329.511684205
   ],
   "end_xy": [
    577442.8094832553,
    4476340.079107001
   ]
  },
  "max_50m": {
   "gradient_pct": 17.057681392043605,
   "start_distance_m": 528.0,
   "end_distance_m": 578.0,
   "midpoint_distance_m": 553.0,
   "start_elevation_m": 316.32989273336034,
   "end_elevation_m": 324.85873342938214,
   "start_xy": [
    577465.2925245336,
    4476329.511684205
   ],
   "end_xy": [
    577418.1871979893,
    4476344.408423908
   ]
  },
  "max_100m": {
   "gradient_pct": 16.528410590739554,
   "start_distance_m": 496.0,
   "end_distance_m": 596.0,
   "midpoint_distance_m": 546.0,
   "start_elevation_m": 311.216159221667,
   "end_elevation_m": 327.74456981240655,
   "start_xy": [
    577488.181600008,
    4476308.365464817
   ],
   "end_xy": [
    577400.4592607603,
    4476347.52614608
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.246549926882153,
   "start_distance_m": 67.0,
   "end_distance_m": 72.0,
   "midpoint_distance_m": 69.5,
   "start_elevation_m": 277.0186984561821,
   "end_elevation_m": 276.906370959838,
   "start_xy": [
    577756.2757312319,
    4476359.453632355
   ],
   "end_xy": [
    577754.7405713075,
    4476354.695136433
   ]
  },
  "min_10m": {
   "gradient_pct": -2.004297803841837,
   "start_distance_m": 60.0,
   "end_distance_m": 70.0,
   "midpoint_distance_m": 65.0,
   "start_elevation_m": 277.1518740896775,
   "end_elevation_m": 276.9514443092933,
   "start_xy": [
    577758.4237820065,
    4476366.115904521
   ],
   "end_xy": [
    577755.354693695,
    4476356.598515953
   ]
  },
  "min_20m": {
   "gradient_pct": -1.7802550329730593,
   "start_distance_m": 53.0,
   "end_distance_m": 73.0,
   "midpoint_distance_m": 63.0,
   "start_elevation_m": 277.2516280701801,
   "end_elevation_m": 276.8955770635855,
   "start_xy": [
    577760.7580962722,
    4476372.692007531
   ],
   "end_xy": [
    577754.4336561578,
    4476353.743399551
   ]
  },
  "min_25m": {
   "gradient_pct": -1.5695533324201278,
   "start_distance_m": 60.0,
   "end_distance_m": 85.0,
   "midpoint_distance_m": 72.5,
   "start_elevation_m": 277.1518740896775,
   "end_elevation_m": 276.7594857565725,
   "start_xy": [
    577758.4237820065,
    4476366.115904521
   ],
   "end_xy": [
    577750.75070395,
    4476342.322547753
   ]
  },
  "min_50m": {
   "gradient_pct": -1.3350905332849834,
   "start_distance_m": 59.0,
   "end_distance_m": 109.0,
   "midpoint_distance_m": 84.0,
   "start_elevation_m": 277.1638452993948,
   "end_elevation_m": 276.4963000327523,
   "start_xy": [
    577758.7307306633,
    4476367.067630591
   ],
   "end_xy": [
    577743.3888197247,
    4476319.4795502545
   ]
  },
  "min_100m": {
   "gradient_pct": -1.0693532257078004,
   "start_distance_m": 53.0,
   "end_distance_m": 153.0,
   "midpoint_distance_m": 103.0,
   "start_elevation_m": 277.2516280701801,
   "end_elevation_m": 276.1822748444723,
   "start_xy": [
    577760.7580962722,
    4476372.692007531
   ],
   "end_xy": [
    577729.8988150458,
    4476277.598535698
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.14235731404517,
   "start_distance_m": 268.0,
   "end_distance_m": 270.0,
   "midpoint_distance_m": 269.0,
   "start_elevation_m": 287.2604320554521,
   "end_elevation_m": 287.743279201733,
   "start_xy": [
    577652.6124119973,
    4476194.301013805
   ],
   "end_xy": [
    577651.1733501442,
    4476192.912093055
   ]
  },
  "max_3m": {
   "gradient_pct": 23.192101264470466,
   "start_distance_m": 268.0,
   "end_distance_m": 271.0,
   "midpoint_distance_m": 269.5,
   "start_elevation_m": 287.2604320554521,
   "end_elevation_m": 287.9561950933862,
   "start_xy": [
    577652.6124119973,
    4476194.301013805
   ],
   "end_xy": [
    577650.453432503,
    4476192.218033598
   ]
  }
 },
 "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": 0.059,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 23.0,
     "end_m": 48.0,
     "raw_pct": 23.07,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 27.0,
     "end_m": 47.0,
     "raw_pct": 23.29,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 4.0,
     "end_m": 14.0,
     "raw_pct": 24.05,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "excluded_ranges_m": [
   [
    2.0,
    16.0
   ],
   [
    21.0,
    50.0
   ]
  ],
  "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:26917",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa-west/USGS_1M_17_x57y448_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-12T00:06:49+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-us-pa/batch-usa-rchunk01.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": [
   "x57y448"
  ],
  "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": "Thornburg",
  "county": "Pennsylvania"
 }
}