{
 "ocl_version": "0.1.0",
 "name": "Grassy Hollow Road",
 "slug": "grassy-hollow-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.6450188270544,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 5270.0,
   "end_distance_m": 5272.0,
   "start_elevation_m": 590.5957231104492,
   "end_elevation_m": 591.3686234869903,
   "min_gradient_pct": -95.90349128187086,
   "suppressed_max_gradient_pct": 76.66116867828237,
   "suppressed_location_m": [
    5450.0,
    5452.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.53082663382838,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 5269.0,
   "end_distance_m": 5272.0,
   "start_elevation_m": 590.3026986879754,
   "end_elevation_m": 591.3686234869903,
   "min_gradient_pct": -84.79789126245502,
   "suppressed_max_gradient_pct": 72.16925679978203,
   "suppressed_location_m": [
    5449.0,
    5452.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.112406088662738,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 3677.0,
   "end_distance_m": 3682.0,
   "start_elevation_m": 522.0027561784232,
   "end_elevation_m": 523.2583764828563,
   "min_gradient_pct": -68.53185919640964,
   "suppressed_max_gradient_pct": 64.73699268247856,
   "suppressed_location_m": [
    5449.0,
    5454.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.288219090740995,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 3676.0,
   "end_distance_m": 3686.0,
   "start_elevation_m": 521.8409159222984,
   "end_elevation_m": 524.0697378313725,
   "min_gradient_pct": -35.25180938720155,
   "suppressed_max_gradient_pct": 50.64536817283397,
   "suppressed_location_m": [
    5449.0,
    5459.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 17.952030207428606,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 3669.0,
   "end_distance_m": 3689.0,
   "start_elevation_m": 520.7338546792579,
   "end_elevation_m": 524.3242607207436,
   "min_gradient_pct": -23.583880486933708,
   "suppressed_max_gradient_pct": 33.06188769301002,
   "suppressed_location_m": [
    5448.0,
    5468.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 15.843354716477279,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 3669.0,
   "end_distance_m": 3694.0,
   "start_elevation_m": 520.7338546792579,
   "end_elevation_m": 524.6946933583772,
   "min_gradient_pct": -19.926165487007893,
   "suppressed_max_gradient_pct": 27.745664756572296,
   "suppressed_location_m": [
    5448.0,
    5473.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 14.22595214847604,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 181.0,
   "end_distance_m": 231.0,
   "start_elevation_m": 361.9124385237805,
   "end_elevation_m": 369.02541459801853,
   "min_gradient_pct": -12.388887972402927,
   "suppressed_max_gradient_pct": 15.875106571921606,
   "suppressed_location_m": [
    5445.0,
    5495.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.952824831117255,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 161.0,
   "end_distance_m": 261.0,
   "start_elevation_m": 359.8364128514166,
   "end_elevation_m": 372.78923768253384,
   "min_gradient_pct": -6.163742721453673
  }
 ],
 "shape": {
  "ascent_concentration": 0.299,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 72.0,
  "shape_class": "sustained"
 },
 "length_m": 8493.928668474235,
 "start_elevation_m": 353.3144668460742,
 "end_elevation_m": 697.276746878415,
 "endpoint_gain_m": 343.9622800323408,
 "overall_gradient_pct": 4.049507518340471,
 "accumulated_ascent_m": 396.64397298587073,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.112406088662738,
   "start_distance_m": 3677.0,
   "end_distance_m": 3682.0,
   "midpoint_distance_m": 3679.5,
   "start_elevation_m": 522.0027561784232,
   "end_elevation_m": 523.2583764828563,
   "start_xy": [
    384956.18846912094,
    4576981.990139662
   ],
   "end_xy": [
    384951.19771873683,
    4576982.294124406
   ]
  },
  "max_10m": {
   "gradient_pct": 22.288219090740995,
   "start_distance_m": 3676.0,
   "end_distance_m": 3686.0,
   "midpoint_distance_m": 3681.0,
   "start_elevation_m": 521.8409159222984,
   "end_elevation_m": 524.0697378313725,
   "start_xy": [
    384957.1866063743,
    4576981.929131273
   ],
   "end_xy": [
    384947.20510560594,
    4576982.537100759
   ]
  },
  "max_20m": {
   "gradient_pct": 17.952030207428606,
   "start_distance_m": 3669.0,
   "end_distance_m": 3689.0,
   "midpoint_distance_m": 3679.0,
   "start_elevation_m": 520.7338546792579,
   "end_elevation_m": 524.3242607207436,
   "start_xy": [
    384964.173631265,
    4576981.503129752
   ],
   "end_xy": [
    384944.21069384605,
    4576982.720125928
   ]
  },
  "max_25m": {
   "gradient_pct": 15.843354716477279,
   "start_distance_m": 3669.0,
   "end_distance_m": 3694.0,
   "midpoint_distance_m": 3681.5,
   "start_elevation_m": 520.7338546792579,
   "end_elevation_m": 524.6946933583772,
   "start_xy": [
    384964.173631265,
    4576981.503129752
   ],
   "end_xy": [
    384939.2199434619,
    4576983.02411067
   ]
  },
  "max_50m": {
   "gradient_pct": 14.22595214847604,
   "start_distance_m": 181.0,
   "end_distance_m": 231.0,
   "midpoint_distance_m": 206.0,
   "start_elevation_m": 361.9124385237805,
   "end_elevation_m": 369.02541459801853,
   "start_xy": [
    387512.3265825708,
    4575290.340407307
   ],
   "end_xy": [
    387497.9815758236,
    4575338.2384298295
   ]
  },
  "max_100m": {
   "gradient_pct": 12.952824831117255,
   "start_distance_m": 161.0,
   "end_distance_m": 261.0,
   "midpoint_distance_m": 211.0,
   "start_elevation_m": 359.8364128514166,
   "end_elevation_m": 372.78923768253384,
   "start_xy": [
    387518.0643653515,
    4575271.181132381
   ],
   "end_xy": [
    387487.00302420516,
    4575366.128854477
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -68.53185919640964,
   "start_distance_m": 5439.0,
   "end_distance_m": 5444.0,
   "midpoint_distance_m": 5441.5,
   "start_elevation_m": 592.8656471042642,
   "end_elevation_m": 589.4390541444437,
   "start_xy": [
    383940.79920500587,
    4578232.428572071
   ],
   "end_xy": [
    383938.7388331684,
    4578236.944429138
   ]
  },
  "min_10m": {
   "gradient_pct": -35.25180938720155,
   "start_distance_m": 5434.0,
   "end_distance_m": 5444.0,
   "midpoint_distance_m": 5439.0,
   "start_elevation_m": 592.9642350831639,
   "end_elevation_m": 589.4390541444437,
   "start_xy": [
    383943.3597046271,
    4578228.133942935
   ],
   "end_xy": [
    383938.7388331684,
    4578236.944429138
   ]
  },
  "min_20m": {
   "gradient_pct": -23.583880486933708,
   "start_distance_m": 5424.0,
   "end_distance_m": 5444.0,
   "midpoint_distance_m": 5434.0,
   "start_elevation_m": 594.1558302418305,
   "end_elevation_m": 589.4390541444437,
   "start_xy": [
    383948.4810240848,
    4578219.544875608
   ],
   "end_xy": [
    383938.7388331684,
    4578236.944429138
   ]
  },
  "min_25m": {
   "gradient_pct": -19.926165487007893,
   "start_distance_m": 5420.0,
   "end_distance_m": 5445.0,
   "midpoint_distance_m": 5432.5,
   "start_elevation_m": 594.4039325040276,
   "end_elevation_m": 589.4223911322756,
   "start_xy": [
    383950.5298471717,
    4578216.109425198
   ],
   "end_xy": [
    383938.4588331683,
    4578237.904429138
   ]
  },
  "min_50m": {
   "gradient_pct": -12.388887972402927,
   "start_distance_m": 5395.0,
   "end_distance_m": 5445.0,
   "midpoint_distance_m": 5420.0,
   "start_elevation_m": 595.6168351184771,
   "end_elevation_m": 589.4223911322756,
   "start_xy": [
    383963.33310814755,
    4578194.636734572
   ],
   "end_xy": [
    383938.4588331683,
    4578237.904429138
   ]
  },
  "min_100m": {
   "gradient_pct": -6.163742721453673,
   "start_distance_m": 5345.0,
   "end_distance_m": 5445.0,
   "midpoint_distance_m": 5395.0,
   "start_elevation_m": 595.5861338537293,
   "end_elevation_m": 589.4223911322756,
   "start_xy": [
    383990.3915444588,
    4578152.6012697015
   ],
   "end_xy": [
    383938.4588331683,
    4578237.904429138
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.6450188270544,
   "start_distance_m": 5270.0,
   "end_distance_m": 5272.0,
   "midpoint_distance_m": 5271.0,
   "start_elevation_m": 590.5957231104492,
   "end_elevation_m": 591.3686234869903,
   "start_xy": [
    384030.9319057126,
    4578089.610277668
   ],
   "end_xy": [
    384030.0118581855,
    4578091.386090847
   ]
  },
  "max_3m": {
   "gradient_pct": 35.53082663382838,
   "start_distance_m": 5269.0,
   "end_distance_m": 5272.0,
   "midpoint_distance_m": 5270.5,
   "start_elevation_m": 590.3026986879754,
   "end_elevation_m": 591.3686234869903,
   "start_xy": [
    384031.3924410264,
    4578088.722636374
   ],
   "end_xy": [
    384030.0118581855,
    4578091.386090847
   ]
  }
 },
 "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": 0.003,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.014,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 3,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 4996.0,
     "end_m": 5021.0,
     "raw_pct": 25.05,
     "reason": "spike"
    },
    {
     "window_m": 10.0,
     "start_m": 971.0,
     "end_m": 981.0,
     "raw_pct": 35.48,
     "reason": "hump+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 976.0,
     "end_m": 981.0,
     "raw_pct": 41.92,
     "reason": "hump"
    },
    {
     "window_m": 25.0,
     "start_m": 6755.0,
     "end_m": 6780.0,
     "raw_pct": 18.33,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 6754.0,
     "end_m": 6774.0,
     "raw_pct": 20.8,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 6759.0,
     "end_m": 6769.0,
     "raw_pct": 29.28,
     "reason": "hump+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 6761.0,
     "end_m": 6766.0,
     "raw_pct": 36.02,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 4955.0,
     "end_m": 4965.0,
     "raw_pct": 22.49,
     "reason": "short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 4959.0,
     "end_m": 4964.0,
     "raw_pct": 33.23,
     "reason": "short-step"
    }
   ],
   "advisory": []
  },
  "excluded_ranges_m": [
   [
    969.0,
    983.0
   ],
   [
    4953.0,
    4967.0
   ],
   [
    4994.0,
    5023.0
   ],
   [
    5434.0,
    5459.0
   ],
   [
    6752.0,
    6782.0
   ]
  ],
  "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa/USGS_1M_18_x38y458_PA_3_County_South_Central_2018_D18.tif",
   "data/cache/usa/pa/USGS_1M_18_x38y459_PA_3_County_South_Central_2018_D18.tif"
  ],
  "calculated_at": "2026-09-11T22:37:27+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-us-pa/batch-usa-rchunk04.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_3_County_South_Central_2018_D18 (collected 2018)",
  "elevation_tile_ids": [
   "x38y458",
   "x38y459"
  ],
  "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": "Davidson",
  "county": "Pennsylvania"
 }
}