{
 "ocl_version": "0.1.0",
 "name": "Bowlby Hill Road",
 "slug": "bowlby-hill-road-3",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.08119255637314,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 175.0,
   "end_distance_m": 177.0,
   "start_elevation_m": 319.7283268741872,
   "end_elevation_m": 320.36995072531465,
   "min_gradient_pct": -18.927974810398496
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.20798737656878,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 174.0,
   "end_distance_m": 177.0,
   "start_elevation_m": 319.4037111040176,
   "end_elevation_m": 320.36995072531465,
   "min_gradient_pct": -17.535376088583615
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.03334756860886,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 173.0,
   "end_distance_m": 178.0,
   "start_elevation_m": 319.18782131745485,
   "end_elevation_m": 320.6394886958853,
   "min_gradient_pct": -14.926742867847906
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.01787020286997,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 168.0,
   "end_distance_m": 178.0,
   "start_elevation_m": 318.1377016755983,
   "end_elevation_m": 320.6394886958853,
   "min_gradient_pct": -6.75624546346171
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.50604672721323,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 163.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 316.89041863397637,
   "end_elevation_m": 321.391627979419,
   "min_gradient_pct": 0.9952460618845294
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.942042489057712,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 164.0,
   "end_distance_m": 189.0,
   "start_elevation_m": 317.09845237345235,
   "end_elevation_m": 322.5839629957168,
   "min_gradient_pct": 0.9335146859448287
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.75491334345054,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 128.0,
   "end_distance_m": 178.0,
   "start_elevation_m": 311.26203202416,
   "end_elevation_m": 320.6394886958853,
   "min_gradient_pct": 2.8715320885572737
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.633907758824535,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 97.0,
   "end_distance_m": 197.0,
   "start_elevation_m": 305.42777481720793,
   "end_elevation_m": 324.06168257603247,
   "min_gradient_pct": 5.434307549375433
  }
 ],
 "shape": {
  "ascent_concentration": 0.436,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 130.0,
  "shape_class": "sustained"
 },
 "length_m": 234.00000000000955,
 "start_elevation_m": 300.44596460223323,
 "end_elevation_m": 325.40072254521397,
 "endpoint_gain_m": 24.954757942980734,
 "overall_gradient_pct": 10.664426471358851,
 "accumulated_ascent_m": 25.8263520448574,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.03334756860886,
   "start_distance_m": 173.0,
   "end_distance_m": 178.0,
   "midpoint_distance_m": 175.5,
   "start_elevation_m": 319.18782131745485,
   "end_elevation_m": 320.6394886958853,
   "start_xy": [
    570379.7516461206,
    4399549.041342034
   ],
   "end_xy": [
    570375.169230781,
    4399547.114376224
   ]
  },
  "max_10m": {
   "gradient_pct": 25.01787020286997,
   "start_distance_m": 168.0,
   "end_distance_m": 178.0,
   "midpoint_distance_m": 173.0,
   "start_elevation_m": 318.1377016755983,
   "end_elevation_m": 320.6394886958853,
   "start_xy": [
    570384.5599829636,
    4399550.412433228
   ],
   "end_xy": [
    570375.169230781,
    4399547.114376224
   ]
  },
  "max_20m": {
   "gradient_pct": 22.50604672721323,
   "start_distance_m": 163.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 173.0,
   "start_elevation_m": 316.89041863397637,
   "end_elevation_m": 321.391627979419,
   "start_xy": [
    570389.4732236783,
    4399551.302833603
   ],
   "end_xy": [
    570371.0932790601,
    4399544.218410522
   ]
  },
  "max_25m": {
   "gradient_pct": 21.942042489057712,
   "start_distance_m": 164.0,
   "end_distance_m": 189.0,
   "midpoint_distance_m": 176.5,
   "start_elevation_m": 317.09845237345235,
   "end_elevation_m": 322.5839629957168,
   "start_xy": [
    570388.4838011046,
    4399551.157771649
   ],
   "end_xy": [
    570366.2021096464,
    4399540.743290166
   ]
  },
  "max_50m": {
   "gradient_pct": 18.75491334345054,
   "start_distance_m": 128.0,
   "end_distance_m": 178.0,
   "midpoint_distance_m": 153.0,
   "start_elevation_m": 311.26203202416,
   "end_elevation_m": 320.6394886958853,
   "start_xy": [
    570424.1043717137,
    4399556.370711008
   ],
   "end_xy": [
    570375.169230781,
    4399547.114376224
   ]
  },
  "max_100m": {
   "gradient_pct": 18.633907758824535,
   "start_distance_m": 97.0,
   "end_distance_m": 197.0,
   "midpoint_distance_m": 147.0,
   "start_elevation_m": 305.42777481720793,
   "end_elevation_m": 324.06168257603247,
   "start_xy": [
    570454.9957454697,
    4399558.801419748
   ],
   "end_xy": [
    570359.6805159478,
    4399536.109845704
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -14.926742867847906,
   "start_distance_m": 211.0,
   "end_distance_m": 216.0,
   "midpoint_distance_m": 213.5,
   "start_elevation_m": 325.11775748863994,
   "end_elevation_m": 324.37142034524754,
   "start_xy": [
    570348.2678689159,
    4399528.001119144
   ],
   "end_xy": [
    570344.2063688728,
    4399525.085071965
   ]
  },
  "min_10m": {
   "gradient_pct": -6.75624546346171,
   "start_distance_m": 207.0,
   "end_distance_m": 217.0,
   "midpoint_distance_m": 212.0,
   "start_elevation_m": 325.0820912184789,
   "end_elevation_m": 324.40646667213275,
   "start_xy": [
    570351.5286132181,
    4399530.317914928
   ],
   "end_xy": [
    570343.3999135626,
    4399524.493776955
   ]
  },
  "min_20m": {
   "gradient_pct": 0.9952460618845294,
   "start_distance_m": 208.0,
   "end_distance_m": 228.0,
   "midpoint_distance_m": 218.0,
   "start_elevation_m": 325.1320786389723,
   "end_elevation_m": 325.3311278513492,
   "start_xy": [
    570350.7138572761,
    4399529.738110875
   ],
   "end_xy": [
    570334.5237192608,
    4399517.996612246
   ]
  },
  "min_25m": {
   "gradient_pct": 0.9335146859448287,
   "start_distance_m": 209.0,
   "end_distance_m": 234.0,
   "midpoint_distance_m": 221.5,
   "start_elevation_m": 325.16734387372776,
   "end_elevation_m": 325.40072254521397,
   "start_xy": [
    570349.8986320368,
    4399529.15896685
   ],
   "end_xy": [
    570329.6820490374,
    4399514.452853756
   ]
  },
  "min_50m": {
   "gradient_pct": 2.8715320885572737,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 300.44596460223323,
   "end_elevation_m": 301.88173064651187,
   "start_xy": [
    570536.111,
    4399603.097
   ],
   "end_xy": [
    570500.3972501621,
    4399568.305616849
   ]
  },
  "min_100m": {
   "gradient_pct": 5.434307549375433,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 300.44596460223323,
   "end_elevation_m": 305.88027215160866,
   "start_xy": [
    570536.111,
    4399603.097
   ],
   "end_xy": [
    570451.9979504554,
    4399558.686427545
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.08119255637314,
   "start_distance_m": 175.0,
   "end_distance_m": 177.0,
   "midpoint_distance_m": 176.0,
   "start_elevation_m": 319.7283268741872,
   "end_elevation_m": 320.36995072531465,
   "start_xy": [
    570377.8290938222,
    4399548.49083348
   ],
   "end_xy": [
    570376.017999351,
    4399547.6430633515
   ]
  },
  "max_3m": {
   "gradient_pct": 32.20798737656878,
   "start_distance_m": 174.0,
   "end_distance_m": 177.0,
   "midpoint_distance_m": 175.5,
   "start_elevation_m": 319.4037111040176,
   "end_elevation_m": 320.36995072531465,
   "start_xy": [
    570378.7898974011,
    4399548.767408832
   ],
   "end_xy": [
    570376.017999351,
    4399547.6430633515
   ]
  }
 },
 "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": []
 },
 "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_x56y440_PA_WesternPA_2019_D20.tif",
   "data/cache/usa/pa-west/USGS_1M_17_x57y440_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-15T03:18:47+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": [
   "x56y440",
   "x57y440"
  ],
  "route_cut_m": 234.0,
  "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": "Wayne",
  "county": "Pennsylvania"
 }
}