{
 "ocl_version": "0.1.0",
 "name": "Little Road",
 "slug": "little-road-3",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.86415109160214,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 724.0,
   "end_distance_m": 726.0,
   "start_elevation_m": 470.66399461345276,
   "end_elevation_m": 471.1812776352848,
   "min_gradient_pct": -4.093204337397083
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.49794780511358,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 724.0,
   "end_distance_m": 727.0,
   "start_elevation_m": 470.66399461345276,
   "end_elevation_m": 471.42893304760617,
   "min_gradient_pct": -3.6355664712042803
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.91696217352569,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 721.0,
   "end_distance_m": 726.0,
   "start_elevation_m": 469.9354295266085,
   "end_elevation_m": 471.1812776352848,
   "min_gradient_pct": -2.9664307480061325
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.456803923358507,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 721.0,
   "end_distance_m": 731.0,
   "start_elevation_m": 469.9354295266085,
   "end_elevation_m": 472.28110991894437,
   "min_gradient_pct": -2.4840990050199707
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 19.945709456162035,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 717.0,
   "end_distance_m": 737.0,
   "start_elevation_m": 469.2737304933218,
   "end_elevation_m": 473.2628723845542,
   "min_gradient_pct": -1.9830666550927845
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 19.24410687027489,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 721.0,
   "end_distance_m": 746.0,
   "start_elevation_m": 469.9354295266085,
   "end_elevation_m": 474.74645624417724,
   "min_gradient_pct": -1.417346890141971
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.711686244517864,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 717.0,
   "end_distance_m": 767.0,
   "start_elevation_m": 469.2737304933218,
   "end_elevation_m": 477.62957361558074,
   "min_gradient_pct": 1.5157819045363112
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.00210639497658,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 410.0,
   "end_distance_m": 510.0,
   "start_elevation_m": 424.72688317553707,
   "end_elevation_m": 440.72898957051365,
   "min_gradient_pct": 5.286961123313517
  }
 ],
 "shape": {
  "ascent_concentration": 0.335,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 275.0,
  "shape_class": "sustained"
 },
 "length_m": 1516.7887049797978,
 "start_elevation_m": 389.85161860351946,
 "end_elevation_m": 557.5652264480061,
 "endpoint_gain_m": 167.71360784448666,
 "overall_gradient_pct": 11.057150366024148,
 "accumulated_ascent_m": 168.12407441172013,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.91696217352569,
   "start_distance_m": 721.0,
   "end_distance_m": 726.0,
   "midpoint_distance_m": 723.5,
   "start_elevation_m": 469.9354295266085,
   "end_elevation_m": 471.1812776352848,
   "start_xy": [
    375302.306906267,
    4581294.58943591
   ],
   "end_xy": [
    375297.6453891028,
    4581296.397821302
   ]
  },
  "max_10m": {
   "gradient_pct": 23.456803923358507,
   "start_distance_m": 721.0,
   "end_distance_m": 731.0,
   "midpoint_distance_m": 726.0,
   "start_elevation_m": 469.9354295266085,
   "end_elevation_m": 472.28110991894437,
   "start_xy": [
    375302.306906267,
    4581294.58943591
   ],
   "end_xy": [
    375292.98387193866,
    4581298.206206694
   ]
  },
  "max_20m": {
   "gradient_pct": 19.945709456162035,
   "start_distance_m": 717.0,
   "end_distance_m": 737.0,
   "midpoint_distance_m": 727.0,
   "start_elevation_m": 469.2737304933218,
   "end_elevation_m": 473.2628723845542,
   "start_xy": [
    375306.0361199983,
    4581293.142727596
   ],
   "end_xy": [
    375287.3900513417,
    4581300.376269165
   ]
  },
  "max_25m": {
   "gradient_pct": 19.24410687027489,
   "start_distance_m": 721.0,
   "end_distance_m": 746.0,
   "midpoint_distance_m": 733.5,
   "start_elevation_m": 469.9354295266085,
   "end_elevation_m": 474.74645624417724,
   "start_xy": [
    375302.306906267,
    4581294.58943591
   ],
   "end_xy": [
    375279.0215104966,
    4581303.68140595
   ]
  },
  "max_50m": {
   "gradient_pct": 16.711686244517864,
   "start_distance_m": 717.0,
   "end_distance_m": 767.0,
   "midpoint_distance_m": 742.0,
   "start_elevation_m": 469.2737304933218,
   "end_elevation_m": 477.62957361558074,
   "start_xy": [
    375306.0361199983,
    4581293.142727596
   ],
   "end_xy": [
    375260.24814401055,
    4581313.092076
   ]
  },
  "max_100m": {
   "gradient_pct": 16.00210639497658,
   "start_distance_m": 410.0,
   "end_distance_m": 510.0,
   "midpoint_distance_m": 460.0,
   "start_elevation_m": 424.72688317553707,
   "end_elevation_m": 440.72898957051365,
   "start_xy": [
    375585.7047950201,
    4581179.932802367
   ],
   "end_xy": [
    375496.1793653788,
    4581224.435181819
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.9664307480061325,
   "start_distance_m": 2.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 389.8739327388879,
   "end_elevation_m": 389.7256112014876,
   "start_xy": [
    375930.824977195,
    4581342.11906854
   ],
   "end_xy": [
    375925.9424201825,
    4581341.04173989
   ]
  },
  "min_10m": {
   "gradient_pct": -2.4840990050199707,
   "start_distance_m": 3.0,
   "end_distance_m": 13.0,
   "midpoint_distance_m": 8.0,
   "start_elevation_m": 389.8556988139285,
   "end_elevation_m": 389.6072889134265,
   "start_xy": [
    375929.8484657925,
    4581341.90360281
   ],
   "end_xy": [
    375920.08335176756,
    4581339.74894551
   ]
  },
  "min_20m": {
   "gradient_pct": -1.9830666550927845,
   "start_distance_m": 2.0,
   "end_distance_m": 22.0,
   "midpoint_distance_m": 12.0,
   "start_elevation_m": 389.8739327388879,
   "end_elevation_m": 389.47731940786935,
   "start_xy": [
    375930.824977195,
    4581342.11906854
   ],
   "end_xy": [
    375911.37204950664,
    4581337.495462756
   ]
  },
  "min_25m": {
   "gradient_pct": -1.417346890141971,
   "start_distance_m": 1.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 13.5,
   "start_elevation_m": 389.87359857518567,
   "end_elevation_m": 389.5192618526502,
   "start_xy": [
    375931.80148859747,
    4581342.33453427
   ],
   "end_xy": [
    375907.51184769225,
    4581336.447206131
   ]
  },
  "min_50m": {
   "gradient_pct": 1.5157819045363112,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 389.85161860351946,
   "end_elevation_m": 390.6095095557876,
   "start_xy": [
    375932.778,
    4581342.55
   ],
   "end_xy": [
    375887.540128849,
    4581323.71774322
   ]
  },
  "min_100m": {
   "gradient_pct": 5.286961123313517,
   "start_distance_m": 192.0,
   "end_distance_m": 292.0,
   "midpoint_distance_m": 242.0,
   "start_elevation_m": 404.33052959234055,
   "end_elevation_m": 409.61749071565407,
   "start_xy": [
    375787.36765753385,
    4581224.066455645
   ],
   "end_xy": [
    375699.88839720335,
    4581175.902205438
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.86415109160214,
   "start_distance_m": 724.0,
   "end_distance_m": 726.0,
   "midpoint_distance_m": 725.0,
   "start_elevation_m": 470.66399461345276,
   "end_elevation_m": 471.1812776352848,
   "start_xy": [
    375299.5099959685,
    4581295.6744671445
   ],
   "end_xy": [
    375297.6453891028,
    4581296.397821302
   ]
  },
  "max_3m": {
   "gradient_pct": 25.49794780511358,
   "start_distance_m": 724.0,
   "end_distance_m": 727.0,
   "midpoint_distance_m": 725.5,
   "start_elevation_m": 470.66399461345276,
   "end_elevation_m": 471.42893304760617,
   "start_xy": [
    375299.5099959685,
    4581295.6744671445
   ],
   "end_xy": [
    375296.71308567,
    4581296.75949838
   ]
  }
 },
 "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa/USGS_1M_18_x37y459_PA_3_County_South_Central_2018_D18.tif"
  ],
  "calculated_at": "2026-09-07T13:15:07+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-band3.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_3_County_South_Central_2018_D18 (collected 2018)",
  "elevation_tile_ids": [
   "x37y459"
  ],
  "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": "Laporte",
  "county": "Pennsylvania"
 }
}