{
 "ocl_version": "0.1.0",
 "name": "Steep Mountain Road",
 "slug": "steep-mountain-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 36.68756423026878,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 199.0,
   "end_distance_m": 201.0,
   "start_elevation_m": 225.6648213142606,
   "end_elevation_m": 226.39857259886597,
   "min_gradient_pct": -5.108713634355411
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 34.79565938611415,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 200.0,
   "end_distance_m": 203.0,
   "start_elevation_m": 226.00497039260324,
   "end_elevation_m": 227.04884017418667,
   "min_gradient_pct": -4.294301473382234
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 33.46536753149792,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 199.0,
   "end_distance_m": 204.0,
   "start_elevation_m": 225.6648213142606,
   "end_elevation_m": 227.3380896908355,
   "min_gradient_pct": -2.0395186805808407
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.453969788554673,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 195.0,
   "end_distance_m": 205.0,
   "start_elevation_m": 224.79622305396163,
   "end_elevation_m": 227.5416200328171,
   "min_gradient_pct": -0.15854250766125233
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.406636972486183,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 199.0,
   "end_distance_m": 219.0,
   "start_elevation_m": 225.6648213142606,
   "end_elevation_m": 230.74614870875783,
   "min_gradient_pct": 3.7808787857581194
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.099758317365513,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 190.0,
   "end_distance_m": 215.0,
   "start_elevation_m": 223.57503930454072,
   "end_elevation_m": 229.8499788838821,
   "min_gradient_pct": 5.07471403758791
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 23.3530926548641,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 190.0,
   "end_distance_m": 240.0,
   "start_elevation_m": 223.57503930454072,
   "end_elevation_m": 235.25158563197277,
   "min_gradient_pct": 8.7345037475651
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.747215817562306,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 161.0,
   "end_distance_m": 261.0,
   "start_elevation_m": 217.81930346773908,
   "end_elevation_m": 239.56651928530138,
   "min_gradient_pct": 10.637876788125508
  }
 ],
 "shape": {
  "ascent_concentration": 0.316,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 440.0,
  "shape_class": "sustained"
 },
 "length_m": 540.3185369790132,
 "start_elevation_m": 197.17620743775717,
 "end_elevation_m": 284.80824346093976,
 "endpoint_gain_m": 87.6320360231826,
 "overall_gradient_pct": 16.218587745137153,
 "accumulated_ascent_m": 87.89745878374706,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 33.46536753149792,
   "start_distance_m": 199.0,
   "end_distance_m": 204.0,
   "midpoint_distance_m": 201.5,
   "start_elevation_m": 225.6648213142606,
   "end_elevation_m": 227.3380896908355,
   "start_xy": [
    413806.40774557163,
    4504580.484715421
   ],
   "end_xy": [
    413804.26325368136,
    4504585.001479144
   ]
  },
  "max_10m": {
   "gradient_pct": 27.453969788554673,
   "start_distance_m": 195.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 200.0,
   "start_elevation_m": 224.79622305396163,
   "end_elevation_m": 227.5416200328171,
   "start_xy": [
    413808.03178393404,
    4504576.834144871
   ],
   "end_xy": [
    413803.8343553033,
    4504585.904831889
   ]
  },
  "max_20m": {
   "gradient_pct": 25.406636972486183,
   "start_distance_m": 199.0,
   "end_distance_m": 219.0,
   "midpoint_distance_m": 209.0,
   "start_elevation_m": 225.6648213142606,
   "end_elevation_m": 230.74614870875783,
   "start_xy": [
    413806.40774557163,
    4504580.484715421
   ],
   "end_xy": [
    413797.82977801055,
    4504598.551770315
   ]
  },
  "max_25m": {
   "gradient_pct": 25.099758317365513,
   "start_distance_m": 190.0,
   "end_distance_m": 215.0,
   "midpoint_distance_m": 202.5,
   "start_elevation_m": 223.57503930454072,
   "end_elevation_m": 229.8499788838821,
   "start_xy": [
    413809.6417852546,
    4504572.100446978
   ],
   "end_xy": [
    413799.5453715228,
    4504594.938359336
   ]
  },
  "max_50m": {
   "gradient_pct": 23.3530926548641,
   "start_distance_m": 190.0,
   "end_distance_m": 240.0,
   "midpoint_distance_m": 215.0,
   "start_elevation_m": 223.57503930454072,
   "end_elevation_m": 235.25158563197277,
   "start_xy": [
    413809.6417852546,
    4504572.100446978
   ],
   "end_xy": [
    413788.8229120714,
    4504617.522177952
   ]
  },
  "max_100m": {
   "gradient_pct": 21.747215817562306,
   "start_distance_m": 161.0,
   "end_distance_m": 261.0,
   "midpoint_distance_m": 211.0,
   "start_elevation_m": 217.81930346773908,
   "end_elevation_m": 239.56651928530138,
   "start_xy": [
    413818.9797929136,
    4504544.644999195
   ],
   "end_xy": [
    413779.6108770901,
    4504636.380460005
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.0395186805808407,
   "start_distance_m": 31.0,
   "end_distance_m": 36.0,
   "midpoint_distance_m": 33.5,
   "start_elevation_m": 200.55889537310605,
   "end_elevation_m": 200.456919439077,
   "start_xy": [
    413851.86613244604,
    4504435.84328949
   ],
   "end_xy": [
    413850.24873445346,
    4504440.574465214
   ]
  },
  "min_10m": {
   "gradient_pct": -0.15854250766125233,
   "start_distance_m": 25.0,
   "end_distance_m": 35.0,
   "midpoint_distance_m": 30.0,
   "start_elevation_m": 200.4307174043587,
   "end_elevation_m": 200.41486315359256,
   "start_xy": [
    413853.8070100371,
    4504430.165878621
   ],
   "end_xy": [
    413850.57221405196,
    4504439.62823007
   ]
  },
  "min_20m": {
   "gradient_pct": 3.7808787857581194,
   "start_distance_m": 22.0,
   "end_distance_m": 42.0,
   "midpoint_distance_m": 32.0,
   "start_elevation_m": 200.20909354605485,
   "end_elevation_m": 200.96526930320647,
   "start_xy": [
    413854.77744883264,
    4504427.3271731865
   ],
   "end_xy": [
    413848.3078568624,
    4504446.251876083
   ]
  },
  "min_25m": {
   "gradient_pct": 5.07471403758791,
   "start_distance_m": 22.0,
   "end_distance_m": 47.0,
   "midpoint_distance_m": 34.5,
   "start_elevation_m": 200.20909354605485,
   "end_elevation_m": 201.47777205545182,
   "start_xy": [
    413854.77744883264,
    4504427.3271731865
   ],
   "end_xy": [
    413846.6904588698,
    4504450.983051808
   ]
  },
  "min_50m": {
   "gradient_pct": 8.7345037475651,
   "start_distance_m": 21.0,
   "end_distance_m": 71.0,
   "midpoint_distance_m": 46.0,
   "start_elevation_m": 200.05969077409773,
   "end_elevation_m": 204.42694264788028,
   "start_xy": [
    413855.10092843114,
    4504426.380938042
   ],
   "end_xy": [
    413829.4006311013,
    4504466.384621954
   ]
  },
  "min_100m": {
   "gradient_pct": 10.637876788125508,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 197.17620743775717,
   "end_elevation_m": 207.81408422588268,
   "start_xy": [
    413861.894,
    4504406.51
   ],
   "end_xy": [
    413813.9172576356,
    4504485.434925765
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 36.68756423026878,
   "start_distance_m": 199.0,
   "end_distance_m": 201.0,
   "midpoint_distance_m": 200.0,
   "start_elevation_m": 225.6648213142606,
   "end_elevation_m": 226.39857259886597,
   "start_xy": [
    413806.40774557163,
    4504580.484715421
   ],
   "end_xy": [
    413805.5499488155,
    4504582.2914209105
   ]
  },
  "max_3m": {
   "gradient_pct": 34.79565938611415,
   "start_distance_m": 200.0,
   "end_distance_m": 203.0,
   "midpoint_distance_m": 201.5,
   "start_elevation_m": 226.00497039260324,
   "end_elevation_m": 227.04884017418667,
   "start_xy": [
    413805.97884719353,
    4504581.388068166
   ],
   "end_xy": [
    413804.6921520594,
    4504584.098126399
   ]
  }
 },
 "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",
   "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa/USGS_1M_18_x41y451_PA_3_County_South_Central_2018_D18.tif"
  ],
  "calculated_at": "2026-09-07T10:27:29+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_3_County_South_Central_2018_D18 (collected 2018)",
  "elevation_tile_ids": [
   "x41y451"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_3_County_South_Central_2018_D18: HTTP Error 404: Not Found",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "East Brunswick",
  "county": "Pennsylvania"
 }
}