{
 "ocl_version": "0.1.0",
 "name": "Packard Road",
 "slug": "packard-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.89730765034642,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 220.0,
   "end_distance_m": 222.0,
   "start_elevation_m": 99.64650088061494,
   "end_elevation_m": 100.32444703362187,
   "min_gradient_pct": -13.218311603472443
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.91657119307985,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 219.0,
   "end_distance_m": 222.0,
   "start_elevation_m": 99.33694989782947,
   "end_elevation_m": 100.32444703362187,
   "min_gradient_pct": -12.82318257978782
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.966570015510626,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 218.0,
   "end_distance_m": 223.0,
   "start_elevation_m": 99.10723827585885,
   "end_elevation_m": 100.55556677663438,
   "min_gradient_pct": -12.696179552771696
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.960690963883195,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 287.0,
   "end_distance_m": 297.0,
   "start_elevation_m": 103.68886202135529,
   "end_elevation_m": 106.28493111774361,
   "min_gradient_pct": -12.515757261800928
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.840342160102466,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 284.0,
   "end_distance_m": 304.0,
   "start_elevation_m": 102.99317728464516,
   "end_elevation_m": 107.36124571666565,
   "min_gradient_pct": -12.115786837005942
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.03288970772354,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 282.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 102.7387024871162,
   "end_elevation_m": 107.74692491404709,
   "min_gradient_pct": -12.018209198770933
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 15.163514193585627,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 174.0,
   "end_distance_m": 224.0,
   "start_elevation_m": 93.1060108565953,
   "end_elevation_m": 100.68776795338812,
   "min_gradient_pct": -11.178132877549046
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 11.722693721033606,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 272.0,
   "end_distance_m": 372.0,
   "start_elevation_m": 101.83906509465419,
   "end_elevation_m": 113.5617588156878,
   "min_gradient_pct": -9.102575332176315
  }
 ],
 "shape": {
  "ascent_concentration": 0.485,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 65.0,
  "shape_class": "stepped"
 },
 "length_m": 2982.1043901847916,
 "start_elevation_m": 84.82949534064716,
 "end_elevation_m": 158.53115164935554,
 "endpoint_gain_m": 73.70165630870838,
 "overall_gradient_pct": 2.471464666068961,
 "accumulated_ascent_m": 101.67141703344538,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.966570015510626,
   "start_distance_m": 218.0,
   "end_distance_m": 223.0,
   "midpoint_distance_m": 220.5,
   "start_elevation_m": 99.10723827585885,
   "end_elevation_m": 100.55556677663438,
   "start_xy": [
    415793.6022596378,
    4896924.825814079
   ],
   "end_xy": [
    415791.24815372896,
    4896920.414670761
   ]
  },
  "max_10m": {
   "gradient_pct": 25.960690963883195,
   "start_distance_m": 287.0,
   "end_distance_m": 297.0,
   "midpoint_distance_m": 292.0,
   "start_elevation_m": 103.68886202135529,
   "end_elevation_m": 106.28493111774361,
   "start_xy": [
    415759.51654362463,
    4896883.583359945
   ],
   "end_xy": [
    415752.0393816489,
    4896890.210208341
   ]
  },
  "max_20m": {
   "gradient_pct": 21.840342160102466,
   "start_distance_m": 284.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 294.0,
   "start_elevation_m": 102.99317728464516,
   "end_elevation_m": 107.36124571666565,
   "start_xy": [
    415761.70871155657,
    4896881.535336566
   ],
   "end_xy": [
    415746.3802068517,
    4896894.305817233
   ]
  },
  "max_25m": {
   "gradient_pct": 20.03288970772354,
   "start_distance_m": 282.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 294.5,
   "start_elevation_m": 102.7387024871162,
   "end_elevation_m": 107.74692491404709,
   "start_xy": [
    415763.1701568446,
    4896880.169987648
   ],
   "end_xy": [
    415743.74164756126,
    4896895.733404313
   ]
  },
  "max_50m": {
   "gradient_pct": 15.163514193585627,
   "start_distance_m": 174.0,
   "end_distance_m": 224.0,
   "midpoint_distance_m": 199.0,
   "start_elevation_m": 93.1060108565953,
   "end_elevation_m": 100.68776795338812,
   "start_xy": [
    415814.3183916358,
    4896963.643875275
   ],
   "end_xy": [
    415790.7773325472,
    4896919.532442098
   ]
  },
  "max_100m": {
   "gradient_pct": 11.722693721033606,
   "start_distance_m": 272.0,
   "end_distance_m": 372.0,
   "midpoint_distance_m": 322.0,
   "start_elevation_m": 101.83906509465419,
   "end_elevation_m": 113.5617588156878,
   "start_xy": [
    415770.8754695428,
    4896880.786192271
   ],
   "end_xy": [
    415687.04799265397,
    4896927.445990574
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.696179552771696,
   "start_distance_m": 1702.0,
   "end_distance_m": 1707.0,
   "midpoint_distance_m": 1704.5,
   "start_elevation_m": 113.65367646639248,
   "end_elevation_m": 113.0188674887539,
   "start_xy": [
    415098.3252639317,
    4898030.501886153
   ],
   "end_xy": [
    415099.497733931,
    4898035.362473987
   ]
  },
  "min_10m": {
   "gradient_pct": -12.515757261800928,
   "start_distance_m": 1702.0,
   "end_distance_m": 1712.0,
   "midpoint_distance_m": 1707.0,
   "start_elevation_m": 113.65367646639248,
   "end_elevation_m": 112.40210074021239,
   "start_xy": [
    415098.3252639317,
    4898030.501886153
   ],
   "end_xy": [
    415100.6702039303,
    4898040.223061822
   ]
  },
  "min_20m": {
   "gradient_pct": -12.115786837005942,
   "start_distance_m": 1702.0,
   "end_distance_m": 1722.0,
   "midpoint_distance_m": 1712.0,
   "start_elevation_m": 113.65367646639248,
   "end_elevation_m": 111.2305190989913,
   "start_xy": [
    415098.3252639317,
    4898030.501886153
   ],
   "end_xy": [
    415103.0151439288,
    4898049.944237492
   ]
  },
  "min_25m": {
   "gradient_pct": -12.018209198770933,
   "start_distance_m": 1700.0,
   "end_distance_m": 1725.0,
   "midpoint_distance_m": 1712.5,
   "start_elevation_m": 113.88980693658476,
   "end_elevation_m": 110.88525463689203,
   "start_xy": [
    415097.856275932,
    4898028.557651019
   ],
   "end_xy": [
    415103.7186259284,
    4898052.8605901925
   ]
  },
  "min_50m": {
   "gradient_pct": -11.178132877549046,
   "start_distance_m": 1682.0,
   "end_distance_m": 1732.0,
   "midpoint_distance_m": 1707.0,
   "start_elevation_m": 115.78120408736987,
   "end_elevation_m": 110.19213764859535,
   "start_xy": [
    415093.6353839346,
    4898011.059534812
   ],
   "end_xy": [
    415105.3600839274,
    4898059.665413162
   ]
  },
  "min_100m": {
   "gradient_pct": -9.102575332176315,
   "start_distance_m": 1656.0,
   "end_distance_m": 1756.0,
   "midpoint_distance_m": 1706.0,
   "start_elevation_m": 117.59946633351936,
   "end_elevation_m": 108.49689100134304,
   "start_xy": [
    415087.5385399383,
    4897985.784478071
   ],
   "end_xy": [
    415110.987939924,
    4898082.996234769
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.89730765034642,
   "start_distance_m": 220.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 221.0,
   "start_elevation_m": 99.64650088061494,
   "end_elevation_m": 100.32444703362187,
   "start_xy": [
    415792.66061727423,
    4896923.061356752
   ],
   "end_xy": [
    415791.71897491073,
    4896921.296899425
   ]
  },
  "max_3m": {
   "gradient_pct": 32.91657119307985,
   "start_distance_m": 219.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 220.5,
   "start_elevation_m": 99.33694989782947,
   "end_elevation_m": 100.32444703362187,
   "start_xy": [
    415793.131438456,
    4896923.943585415
   ],
   "end_xy": [
    415791.71897491073,
    4896921.296899425
   ]
  }
 },
 "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": [
   "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/me/USGS_1M_19_x41y490_ME_SouthCoastal_2020_A20.tif"
  ],
  "calculated_at": "2026-08-24T20:42:01+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/maine-2026-08-22.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-me-3-260824",
  "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, ME_SouthCoastal_2020_A20 (collected 2020)",
  "elevation_tile_ids": [
   "x41y490"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 10.4% over 200 m (Terrain 50), gain 73.5 m over 2982 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "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.html"
 },
 "area": {
  "place": "Monmouth",
  "county": "Maine"
 }
}