{
 "ocl_version": "0.1.0",
 "name": "Slab Road",
 "slug": "slab-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.59955763342077,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 447.0,
   "end_distance_m": 449.0,
   "start_elevation_m": 108.4452647377006,
   "end_elevation_m": 109.09725589036901,
   "min_gradient_pct": -29.72091371714498,
   "suppressed_max_gradient_pct": 77.78980628475409,
   "suppressed_location_m": [
    530.0,
    532.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.629157503741983,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 446.0,
   "end_distance_m": 449.0,
   "start_elevation_m": 108.20838116525675,
   "end_elevation_m": 109.09725589036901,
   "min_gradient_pct": -27.59054331643919,
   "suppressed_max_gradient_pct": 69.96997661230562,
   "suppressed_location_m": [
    529.0,
    532.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 19.902696020553208,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 647.0,
   "end_distance_m": 652.0,
   "start_elevation_m": 129.23605305580247,
   "end_elevation_m": 130.23118785683013,
   "min_gradient_pct": -22.322443786124495,
   "suppressed_max_gradient_pct": 46.30962966358737,
   "suppressed_location_m": [
    527.0,
    532.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 18.63739730984804,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 643.0,
   "end_distance_m": 653.0,
   "start_elevation_m": 128.54307604724193,
   "end_elevation_m": 130.40681577822673,
   "min_gradient_pct": -10.561440459393197,
   "suppressed_max_gradient_pct": 35.02099751031736,
   "suppressed_location_m": [
    156.0,
    166.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 16.375598431730367,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 642.0,
   "end_distance_m": 662.0,
   "start_elevation_m": 128.36936042553907,
   "end_elevation_m": 131.64448011188514,
   "min_gradient_pct": -3.048356580925571,
   "suppressed_max_gradient_pct": 27.606955202547283,
   "suppressed_location_m": [
    152.0,
    172.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 14.449814871262788,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 642.0,
   "end_distance_m": 667.0,
   "start_elevation_m": 128.36936042553907,
   "end_elevation_m": 131.98181414335477,
   "min_gradient_pct": -0.7624482506615777,
   "suppressed_max_gradient_pct": 23.929088232635877,
   "suppressed_location_m": [
    146.0,
    171.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 11.098955953034249,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 211.0,
   "end_distance_m": 261.0,
   "start_elevation_m": 87.64603583335418,
   "end_elevation_m": 93.1955138098713,
   "min_gradient_pct": 1.0854151503991147,
   "suppressed_max_gradient_pct": 19.845616111397362,
   "suppressed_location_m": [
    608.0,
    658.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 10.59985638725479,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 695.0,
   "end_distance_m": 795.0,
   "start_elevation_m": 132.19782866221968,
   "end_elevation_m": 142.79768504947447,
   "min_gradient_pct": 2.1489384342753794,
   "suppressed_max_gradient_pct": 15.16043138966279,
   "suppressed_location_m": [
    562.0,
    662.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.337,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 67.0,
  "shape_class": "sustained"
 },
 "length_m": 1067.02557524345,
 "start_elevation_m": 68.75639194091754,
 "end_elevation_m": 158.01558237306665,
 "endpoint_gain_m": 89.25919043214911,
 "overall_gradient_pct": 8.365234395790743,
 "accumulated_ascent_m": 94.33265988651196,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 19.902696020553208,
   "start_distance_m": 647.0,
   "end_distance_m": 652.0,
   "midpoint_distance_m": 649.5,
   "start_elevation_m": 129.23605305580247,
   "end_elevation_m": 130.23118785683013,
   "start_xy": [
    386461.34967319533,
    4407067.093750669
   ],
   "end_xy": [
    386459.6758966688,
    4407062.382255152
   ]
  },
  "max_10m": {
   "gradient_pct": 18.63739730984804,
   "start_distance_m": 643.0,
   "end_distance_m": 653.0,
   "midpoint_distance_m": 648.0,
   "start_elevation_m": 128.54307604724193,
   "end_elevation_m": 130.40681577822673,
   "start_xy": [
    386462.7036301712,
    4407070.857631242
   ],
   "end_xy": [
    386459.3448266138,
    4407061.438649086
   ]
  },
  "max_20m": {
   "gradient_pct": 16.375598431730367,
   "start_distance_m": 642.0,
   "end_distance_m": 662.0,
   "midpoint_distance_m": 652.0,
   "start_elevation_m": 128.36936042553907,
   "end_elevation_m": 131.64448011188514,
   "start_xy": [
    386463.04181346216,
    4407071.798711443
   ],
   "end_xy": [
    386456.3605868203,
    4407052.947813127
   ]
  },
  "max_25m": {
   "gradient_pct": 14.449814871262788,
   "start_distance_m": 642.0,
   "end_distance_m": 667.0,
   "midpoint_distance_m": 654.5,
   "start_elevation_m": 128.36936042553907,
   "end_elevation_m": 131.98181414335477,
   "start_xy": [
    386463.04181346216,
    4407071.798711443
   ],
   "end_xy": [
    386454.70295745926,
    4407048.230582732
   ]
  },
  "max_50m": {
   "gradient_pct": 11.098955953034249,
   "start_distance_m": 211.0,
   "end_distance_m": 261.0,
   "midpoint_distance_m": 236.0,
   "start_elevation_m": 87.64603583335418,
   "end_elevation_m": 93.1955138098713,
   "start_xy": [
    386629.29851908475,
    4407429.040782691
   ],
   "end_xy": [
    386618.412400228,
    4407380.240250562
   ]
  },
  "max_100m": {
   "gradient_pct": 10.59985638725479,
   "start_distance_m": 695.0,
   "end_distance_m": 795.0,
   "midpoint_distance_m": 745.0,
   "start_elevation_m": 132.19782866221968,
   "end_elevation_m": 142.79768504947447,
   "start_xy": [
    386445.4196973455,
    4407021.814281918
   ],
   "end_xy": [
    386440.0007185065,
    4406922.708409041
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -22.322443786124495,
   "start_distance_m": 453.0,
   "end_distance_m": 458.0,
   "midpoint_distance_m": 455.5,
   "start_elevation_m": 109.0728603038869,
   "end_elevation_m": 107.95673811458067,
   "start_xy": [
    386589.42290065193,
    4407204.353425104
   ],
   "end_xy": [
    386585.51764525444,
    4407201.231089992
   ]
  },
  "min_10m": {
   "gradient_pct": -10.561440459393197,
   "start_distance_m": 449.0,
   "end_distance_m": 459.0,
   "midpoint_distance_m": 454.0,
   "start_elevation_m": 109.09725589036901,
   "end_elevation_m": 108.0411118444297,
   "start_xy": [
    386592.5469609615,
    4407206.8514732905
   ],
   "end_xy": [
    386584.7368101868,
    4407200.606352826
   ]
  },
  "min_20m": {
   "gradient_pct": -3.048356580925571,
   "start_distance_m": 449.0,
   "end_distance_m": 469.0,
   "midpoint_distance_m": 459.0,
   "start_elevation_m": 109.09725589036901,
   "end_elevation_m": 108.4875845741839,
   "start_xy": [
    386592.5469609615,
    4407206.8514732905
   ],
   "end_xy": [
    386576.9266594122,
    4407194.36123236
   ]
  },
  "min_25m": {
   "gradient_pct": -0.7624482506615777,
   "start_distance_m": 449.0,
   "end_distance_m": 474.0,
   "midpoint_distance_m": 461.5,
   "start_elevation_m": 109.09725589036901,
   "end_elevation_m": 108.90664382770362,
   "start_xy": [
    386592.5469609615,
    4407206.8514732905
   ],
   "end_xy": [
    386573.0151741944,
    4407191.246770968
   ]
  },
  "min_50m": {
   "gradient_pct": 1.0854151503991147,
   "start_distance_m": 822.0,
   "end_distance_m": 872.0,
   "midpoint_distance_m": 847.0,
   "start_elevation_m": 144.6309708628453,
   "end_elevation_m": 145.17367843804485,
   "start_xy": [
    386444.4480871642,
    4406896.085000823
   ],
   "end_xy": [
    386440.13882045686,
    4406847.506509086
   ]
  },
  "min_100m": {
   "gradient_pct": 2.1489384342753794,
   "start_distance_m": 816.0,
   "end_distance_m": 916.0,
   "midpoint_distance_m": 866.0,
   "start_elevation_m": 144.40520451601816,
   "end_elevation_m": 146.55414295029354,
   "start_xy": [
    386443.40514710994,
    4406901.993661475
   ],
   "end_xy": [
    386411.9331154585,
    4406814.247928575
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.59955763342077,
   "start_distance_m": 447.0,
   "end_distance_m": 449.0,
   "midpoint_distance_m": 448.0,
   "start_elevation_m": 108.4452647377006,
   "end_elevation_m": 109.09725589036901,
   "start_xy": [
    386594.1089911165,
    4407208.100497384
   ],
   "end_xy": [
    386592.5469609615,
    4407206.8514732905
   ]
  },
  "max_3m": {
   "gradient_pct": 29.629157503741983,
   "start_distance_m": 446.0,
   "end_distance_m": 449.0,
   "midpoint_distance_m": 447.5,
   "start_elevation_m": 108.20838116525675,
   "end_elevation_m": 109.09725589036901,
   "start_xy": [
    386594.88982607116,
    4407208.725234692
   ],
   "end_xy": [
    386592.5469609615,
    4407206.8514732905
   ]
  }
 },
 "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": 0.007,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.087,
   "windows_resited": [
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 3,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 146.0,
     "end_m": 171.0,
     "raw_pct": 23.93,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 152.0,
     "end_m": 172.0,
     "raw_pct": 27.61,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 156.0,
     "end_m": 166.0,
     "raw_pct": 35.02,
     "reason": "hump+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 155.0,
     "end_m": 160.0,
     "raw_pct": 40.64,
     "reason": "hump+short-step"
    },
    {
     "window_m": 25.0,
     "start_m": 614.0,
     "end_m": 639.0,
     "raw_pct": 23.02,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 617.0,
     "end_m": 637.0,
     "raw_pct": 24.95,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 617.0,
     "end_m": 627.0,
     "raw_pct": 26.44,
     "reason": "hump"
    },
    {
     "window_m": 5.0,
     "start_m": 438.0,
     "end_m": 443.0,
     "raw_pct": 31.04,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 506.0,
     "end_m": 516.0,
     "raw_pct": 21.28,
     "reason": "hump"
    }
   ],
   "advisory": []
  },
  "excluded_ranges_m": [
   [
    144.0,
    174.0
   ],
   [
    436.0,
    445.0
   ],
   [
    504.0,
    518.0
   ],
   [
    528.0,
    534.0
   ],
   [
    612.0,
    641.0
   ]
  ],
  "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_one_meter_x38y441_PA_Sandy_2014.tif"
  ],
  "calculated_at": "2026-09-11T22:35:42+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-us-pa/batch-usa-rchunk00.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_Sandy_2014 (collected 2014)",
  "elevation_tile_ids": [
   "x38y441"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Lower Chanceford",
  "county": "Pennsylvania"
 }
}