{
 "ocl_version": "0.1.0",
 "name": "Stoney Hollow Drive",
 "slug": "stoney-hollow-drive",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.2036295855159,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 272.0,
   "end_distance_m": 274.0,
   "start_elevation_m": 166.6818377417754,
   "end_elevation_m": 167.22591033348573,
   "min_gradient_pct": -6.607501202178412,
   "suppressed_max_gradient_pct": 61.77368892308124,
   "suppressed_location_m": [
    1.0,
    3.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.70505287383378,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 272.0,
   "end_distance_m": 275.0,
   "start_elevation_m": 166.6818377417754,
   "end_elevation_m": 167.48298932799042,
   "min_gradient_pct": -6.477096122973573,
   "suppressed_max_gradient_pct": 59.716770652530236,
   "suppressed_location_m": [
    1.0,
    4.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.94599960763901,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 271.0,
   "end_distance_m": 276.0,
   "start_elevation_m": 166.42656650091638,
   "end_elevation_m": 167.72386648129833,
   "min_gradient_pct": -6.352306481278447,
   "suppressed_max_gradient_pct": 47.5815959661611,
   "suppressed_location_m": [
    0.0,
    5.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.81414201081128,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 267.0,
   "end_distance_m": 277.0,
   "start_elevation_m": 165.57503362055763,
   "end_elevation_m": 167.95644782163876,
   "min_gradient_pct": -6.095043165899483,
   "suppressed_max_gradient_pct": 27.214036540282507,
   "suppressed_location_m": [
    0.0,
    10.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.99773395386117,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 266.0,
   "end_distance_m": 286.0,
   "start_elevation_m": 165.36621907014012,
   "end_elevation_m": 169.76576586091235,
   "min_gradient_pct": -5.359117226481942
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.86985862453878,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 268.0,
   "end_distance_m": 293.0,
   "start_elevation_m": 165.75843765066782,
   "end_elevation_m": 171.2259023068025,
   "min_gradient_pct": -4.900481873936769
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.07715292675635,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 265.0,
   "end_distance_m": 315.0,
   "start_elevation_m": 165.16208358539276,
   "end_elevation_m": 175.70066004877094,
   "min_gradient_pct": -3.464506650553517
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.759852913389352,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 229.0,
   "end_distance_m": 329.0,
   "start_elevation_m": 158.50109877266624,
   "end_elevation_m": 178.2609516860556,
   "min_gradient_pct": -0.8606634874642225
  }
 ],
 "shape": {
  "ascent_concentration": 0.514,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 170.0,
  "shape_class": "stepped"
 },
 "length_m": 430.65489028027736,
 "start_elevation_m": 144.02816192388224,
 "end_elevation_m": 181.6831083190164,
 "endpoint_gain_m": 37.654946395134175,
 "overall_gradient_pct": 8.743647696796781,
 "accumulated_ascent_m": 40.84104463632187,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.94599960763901,
   "start_distance_m": 271.0,
   "end_distance_m": 276.0,
   "midpoint_distance_m": 273.5,
   "start_elevation_m": 166.42656650091638,
   "end_elevation_m": 167.72386648129833,
   "start_xy": [
    496910.9152562991,
    4549851.137346468
   ],
   "end_xy": [
    496912.44456809433,
    4549855.897725175
   ]
  },
  "max_10m": {
   "gradient_pct": 23.81414201081128,
   "start_distance_m": 267.0,
   "end_distance_m": 277.0,
   "midpoint_distance_m": 272.0,
   "start_elevation_m": 165.57503362055763,
   "end_elevation_m": 167.95644782163876,
   "start_xy": [
    496909.4153860039,
    4549847.433606272
   ],
   "end_xy": [
    496912.7504304534,
    4549856.849800916
   ]
  },
  "max_20m": {
   "gradient_pct": 21.99773395386117,
   "start_distance_m": 266.0,
   "end_distance_m": 286.0,
   "midpoint_distance_m": 276.0,
   "start_elevation_m": 165.36621907014012,
   "end_elevation_m": 169.76576586091235,
   "start_xy": [
    496909.01454792276,
    4549846.517457358
   ],
   "end_xy": [
    496915.5031916849,
    4549865.418482589
   ]
  },
  "max_25m": {
   "gradient_pct": 21.86985862453878,
   "start_distance_m": 268.0,
   "end_distance_m": 293.0,
   "midpoint_distance_m": 280.5,
   "start_elevation_m": 165.75843765066782,
   "end_elevation_m": 171.2259023068025,
   "start_xy": [
    496909.81622408505,
    4549848.349755186
   ],
   "end_xy": [
    496917.6420968003,
    4549872.083694306
   ]
  },
  "max_50m": {
   "gradient_pct": 21.07715292675635,
   "start_distance_m": 265.0,
   "end_distance_m": 315.0,
   "midpoint_distance_m": 290.0,
   "start_elevation_m": 165.16208358539276,
   "end_elevation_m": 175.70066004877094,
   "start_xy": [
    496908.6137098416,
    4549845.601308444
   ],
   "end_xy": [
    496926.3094688454,
    4549892.27100349
   ]
  },
  "max_100m": {
   "gradient_pct": 19.759852913389352,
   "start_distance_m": 229.0,
   "end_distance_m": 329.0,
   "midpoint_distance_m": 279.0,
   "start_elevation_m": 158.50109877266624,
   "end_elevation_m": 178.2609516860556,
   "start_xy": [
    496884.3318740248,
    4549819.576488581
   ],
   "end_xy": [
    496931.1784438974,
    4549905.373294541
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.352306481278447,
   "start_distance_m": 393.0,
   "end_distance_m": 398.0,
   "midpoint_distance_m": 395.5,
   "start_elevation_m": 183.11372614987164,
   "end_elevation_m": 182.79611082580772,
   "start_xy": [
    496917.7313689331,
    4549967.181381184
   ],
   "end_xy": [
    496916.4653626303,
    4549972.011685523
   ]
  },
  "min_10m": {
   "gradient_pct": -6.095043165899483,
   "start_distance_m": 391.0,
   "end_distance_m": 401.0,
   "midpoint_distance_m": 396.0,
   "start_elevation_m": 183.2313621505526,
   "end_elevation_m": 182.62185783396265,
   "start_xy": [
    496918.2171339541,
    4549965.245440653
   ],
   "end_xy": [
    496916.1740025722,
    4549974.997503554
   ]
  },
  "min_20m": {
   "gradient_pct": -5.359117226481942,
   "start_distance_m": 388.0,
   "end_distance_m": 408.0,
   "midpoint_distance_m": 398.0,
   "start_elevation_m": 183.35396215819304,
   "end_elevation_m": 182.28213871289665,
   "start_xy": [
    496918.5037404742,
    4549962.259162584
   ],
   "end_xy": [
    496915.49416243663,
    4549981.964412294
   ]
  },
  "min_25m": {
   "gradient_pct": -4.900481873936769,
   "start_distance_m": 389.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 401.5,
   "start_elevation_m": 183.32066340809416,
   "end_elevation_m": 182.09554293960997,
   "start_xy": [
    496918.40820496745,
    4549963.254588607
   ],
   "end_xy": [
    496914.3370482543,
    4549987.841508611
   ]
  },
  "min_50m": {
   "gradient_pct": -3.464506650553517,
   "start_distance_m": 380.0,
   "end_distance_m": 430.0,
   "midpoint_distance_m": 405.0,
   "start_elevation_m": 183.4252675729267,
   "end_elevation_m": 181.69301424764996,
   "start_xy": [
    496919.2680245277,
    4549954.295754401
   ],
   "end_xy": [
    496911.98098315817,
    4550003.644302089
   ]
  },
  "min_100m": {
   "gradient_pct": -0.8606634874642225,
   "start_distance_m": 58.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 108.0,
   "start_elevation_m": 152.40175880730988,
   "end_elevation_m": 151.54109531984565,
   "start_xy": [
    496860.9980313258,
    4549661.559597346
   ],
   "end_xy": [
    496851.8907067667,
    4549760.759895359
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.2036295855159,
   "start_distance_m": 272.0,
   "end_distance_m": 274.0,
   "midpoint_distance_m": 273.0,
   "start_elevation_m": 166.6818377417754,
   "end_elevation_m": 167.22591033348573,
   "start_xy": [
    496911.2211186581,
    4549852.089422209
   ],
   "end_xy": [
    496911.8328433762,
    4549853.993573693
   ]
  },
  "max_3m": {
   "gradient_pct": 26.70505287383378,
   "start_distance_m": 272.0,
   "end_distance_m": 275.0,
   "midpoint_distance_m": 273.5,
   "start_elevation_m": 166.6818377417754,
   "end_elevation_m": 167.48298932799042,
   "start_xy": [
    496911.2211186581,
    4549852.089422209
   ],
   "end_xy": [
    496912.13870573527,
    4549854.945649434
   ]
  }
 },
 "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": 0.014,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    0.0,
    5.0
   ]
  ],
  "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa/USGS_1M_18_x49y455_PA_Northcentral_2019_B19.tif",
   "data/cache/usa/pa/USGS_1M_18_x49y456_PA_Northcentral_2019_B19.tif"
  ],
  "calculated_at": "2026-09-07T15:07:55+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_Northcentral_2019_B19 (collected 2019)",
  "elevation_tile_ids": [
   "x49y455",
   "x49y456"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_Northcentral_2019_B19: HTTP Error 404: Not Found",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Lehman",
  "county": "Pennsylvania"
 }
}