{
 "ocl_version": "0.1.0",
 "name": "Smith Road",
 "slug": "smith-road-6",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.387430092728323,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 860.0,
   "end_distance_m": 862.0,
   "start_elevation_m": 329.38603915355407,
   "end_elevation_m": 329.85378775540863,
   "min_gradient_pct": -12.430616705321995
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.119510085314232,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 859.0,
   "end_distance_m": 862.0,
   "start_elevation_m": 329.1602024528492,
   "end_elevation_m": 329.85378775540863,
   "min_gradient_pct": -12.46483641427479
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.692701114480087,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 859.0,
   "end_distance_m": 864.0,
   "start_elevation_m": 329.1602024528492,
   "end_elevation_m": 330.2948375085732,
   "min_gradient_pct": -12.090196259525783
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.58834103306276,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 855.0,
   "end_distance_m": 865.0,
   "start_elevation_m": 328.33936958916433,
   "end_elevation_m": 330.4982036924706,
   "min_gradient_pct": -10.909963727499417
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.752070590955043,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 845.0,
   "end_distance_m": 865.0,
   "start_elevation_m": 326.3477895742796,
   "end_elevation_m": 330.4982036924706,
   "min_gradient_pct": -8.838697455468889
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.37605140379378,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 845.0,
   "end_distance_m": 870.0,
   "start_elevation_m": 326.3477895742796,
   "end_elevation_m": 331.44180242522805,
   "min_gradient_pct": -8.560325904566525
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.789561688885556,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 828.0,
   "end_distance_m": 878.0,
   "start_elevation_m": 323.4583245813316,
   "end_elevation_m": 332.8531054257744,
   "min_gradient_pct": -7.552082934017562
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.60334579073742,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 787.0,
   "end_distance_m": 887.0,
   "start_elevation_m": 317.5353282815554,
   "end_elevation_m": 334.1386740722928,
   "min_gradient_pct": -7.109112076167548
  }
 ],
 "shape": {
  "ascent_concentration": 0.559,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 152.0,
  "shape_class": "stepped"
 },
 "length_m": 2163.5052930888655,
 "start_elevation_m": 294.15891519199477,
 "end_elevation_m": 379.711133324432,
 "endpoint_gain_m": 85.55221813243725,
 "overall_gradient_pct": 3.9543336642497047,
 "accumulated_ascent_m": 108.84009034560313,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.692701114480087,
   "start_distance_m": 859.0,
   "end_distance_m": 864.0,
   "midpoint_distance_m": 861.5,
   "start_elevation_m": 329.1602024528492,
   "end_elevation_m": 330.2948375085732,
   "start_xy": [
    586996.3429001031,
    4518486.29727228
   ],
   "end_xy": [
    586992.900941325,
    4518489.9239677135
   ]
  },
  "max_10m": {
   "gradient_pct": 21.58834103306276,
   "start_distance_m": 855.0,
   "end_distance_m": 865.0,
   "midpoint_distance_m": 860.0,
   "start_elevation_m": 328.33936958916433,
   "end_elevation_m": 330.4982036924706,
   "start_xy": [
    586999.0964671255,
    4518483.395915933
   ],
   "end_xy": [
    586992.0960890158,
    4518490.501256533
   ]
  },
  "max_20m": {
   "gradient_pct": 20.752070590955043,
   "start_distance_m": 845.0,
   "end_distance_m": 865.0,
   "midpoint_distance_m": 855.0,
   "start_elevation_m": 326.3477895742796,
   "end_elevation_m": 330.4982036924706,
   "start_xy": [
    587003.5226296347,
    4518474.510368851
   ],
   "end_xy": [
    586992.0960890158,
    4518490.501256533
   ]
  },
  "max_25m": {
   "gradient_pct": 20.37605140379378,
   "start_distance_m": 845.0,
   "end_distance_m": 870.0,
   "midpoint_distance_m": 857.5,
   "start_elevation_m": 326.3477895742796,
   "end_elevation_m": 331.44180242522805,
   "start_xy": [
    587003.5226296347,
    4518474.510368851
   ],
   "end_xy": [
    586987.5493214169,
    4518492.5117306905
   ]
  },
  "max_50m": {
   "gradient_pct": 18.789561688885556,
   "start_distance_m": 828.0,
   "end_distance_m": 878.0,
   "midpoint_distance_m": 853.0,
   "start_elevation_m": 323.4583245813316,
   "end_elevation_m": 332.8531054257744,
   "start_xy": [
    587004.2217529392,
    4518457.912048977
   ],
   "end_xy": [
    586979.9248221503,
    4518494.933922039
   ]
  },
  "max_100m": {
   "gradient_pct": 16.60334579073742,
   "start_distance_m": 787.0,
   "end_distance_m": 887.0,
   "midpoint_distance_m": 837.0,
   "start_elevation_m": 317.5353282815554,
   "end_elevation_m": 334.1386740722928,
   "start_xy": [
    586990.2548984074,
    4518419.532070851
   ],
   "end_xy": [
    586970.9901635665,
    4518495.55449898
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.090196259525783,
   "start_distance_m": 343.0,
   "end_distance_m": 348.0,
   "midpoint_distance_m": 345.5,
   "start_elevation_m": 310.35103261521715,
   "end_elevation_m": 309.74652280224086,
   "start_xy": [
    587145.0256095252,
    4518038.171600696
   ],
   "end_xy": [
    587140.6875332441,
    4518040.583155011
   ]
  },
  "min_10m": {
   "gradient_pct": -10.909963727499417,
   "start_distance_m": 343.0,
   "end_distance_m": 353.0,
   "midpoint_distance_m": 348.0,
   "start_elevation_m": 310.35103261521715,
   "end_elevation_m": 309.2600362424672,
   "start_xy": [
    587145.0256095252,
    4518038.171600696
   ],
   "end_xy": [
    587137.1326960092,
    4518044.099279615
   ]
  },
  "min_20m": {
   "gradient_pct": -8.838697455468889,
   "start_distance_m": 499.0,
   "end_distance_m": 519.0,
   "midpoint_distance_m": 509.0,
   "start_elevation_m": 300.27408946509735,
   "end_elevation_m": 298.50634997400357,
   "start_xy": [
    587043.7036727726,
    4518156.048344077
   ],
   "end_xy": [
    587029.0980024602,
    4518169.711227912
   ]
  },
  "min_25m": {
   "gradient_pct": -8.560325904566525,
   "start_distance_m": 447.0,
   "end_distance_m": 472.0,
   "midpoint_distance_m": 459.5,
   "start_elevation_m": 304.0424551620274,
   "end_elevation_m": 301.9023736858858,
   "start_xy": [
    587076.4922123206,
    4518115.830672972
   ],
   "end_xy": [
    587061.3119660163,
    4518135.694210475
   ]
  },
  "min_50m": {
   "gradient_pct": -7.552082934017562,
   "start_distance_m": 437.0,
   "end_distance_m": 487.0,
   "midpoint_distance_m": 462.0,
   "start_elevation_m": 304.6677178305853,
   "end_elevation_m": 300.8916763635765,
   "start_xy": [
    587082.6858047179,
    4518107.98700257
   ],
   "end_xy": [
    587052.2038182337,
    4518147.612332976
   ]
  },
  "min_100m": {
   "gradient_pct": -7.109112076167548,
   "start_distance_m": 433.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 483.0,
   "start_elevation_m": 304.8590873878885,
   "end_elevation_m": 297.74997531172096,
   "start_xy": [
    587085.3882017514,
    4518105.037926397
   ],
   "end_xy": [
    587018.8740332415,
    4518179.275246598
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.387430092728323,
   "start_distance_m": 860.0,
   "end_distance_m": 862.0,
   "midpoint_distance_m": 861.0,
   "start_elevation_m": 329.38603915355407,
   "end_elevation_m": 329.85378775540863,
   "start_xy": [
    586995.6545083474,
    4518487.022611367
   ],
   "end_xy": [
    586994.2777248361,
    4518488.47328954
   ]
  },
  "max_3m": {
   "gradient_pct": 23.119510085314232,
   "start_distance_m": 859.0,
   "end_distance_m": 862.0,
   "midpoint_distance_m": 860.5,
   "start_elevation_m": 329.1602024528492,
   "end_elevation_m": 329.85378775540863,
   "start_xy": [
    586996.3429001031,
    4518486.29727228
   ],
   "end_xy": [
    586994.2777248361,
    4518488.47328954
   ]
  }
 },
 "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_x58y452_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T23:10:02+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.osm.pbf",
  "osm_snapshot": "2026-09-06T20:21:35Z",
  "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_WesternPA_2019_D20 (collected 2020)",
  "elevation_tile_ids": [
   "x58y452"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_WesternPA_2019_D20: HTTP Error 404: Not Found",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Penn",
  "county": "Pennsylvania"
 }
}