{
 "ocl_version": "0.1.0",
 "name": "Howe Hill Road",
 "slug": "howe-hill-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.69157400029084,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 341.0,
   "end_distance_m": 343.0,
   "start_elevation_m": 104.63340724766667,
   "end_elevation_m": 105.44723872767248,
   "min_gradient_pct": -50.93174915584626
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.073171602704214,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 341.0,
   "end_distance_m": 344.0,
   "start_elevation_m": 104.63340724766667,
   "end_elevation_m": 105.7156023957478,
   "min_gradient_pct": -49.13919487930182
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.253397213293965,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 341.0,
   "end_distance_m": 346.0,
   "start_elevation_m": 104.63340724766667,
   "end_elevation_m": 106.19607710833137,
   "min_gradient_pct": -40.783604899885404
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.53894494324618,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 573.0,
   "end_distance_m": 583.0,
   "start_elevation_m": 115.77231614000027,
   "end_elevation_m": 118.42621063432489,
   "min_gradient_pct": -23.33519406024891
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.446823329475777,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 308.0,
   "end_distance_m": 328.0,
   "start_elevation_m": 98.60490130200174,
   "end_elevation_m": 103.29426596789689,
   "min_gradient_pct": -13.10978475464644
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.85381985796505,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 308.0,
   "end_distance_m": 333.0,
   "start_elevation_m": 98.60490130200174,
   "end_elevation_m": 104.068356266493,
   "min_gradient_pct": -12.219448856092072
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.9107992165531,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 307.0,
   "end_distance_m": 357.0,
   "start_elevation_m": 98.45888936190818,
   "end_elevation_m": 107.91428897018473,
   "min_gradient_pct": -8.719123707071958
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.828460124320005,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 307.0,
   "end_distance_m": 407.0,
   "start_elevation_m": 98.45888936190818,
   "end_elevation_m": 113.28734948622818,
   "min_gradient_pct": -7.867868052900803
  }
 ],
 "shape": {
  "ascent_concentration": 0.553,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 59.0,
  "shape_class": "stepped"
 },
 "length_m": 4191.934642146872,
 "start_elevation_m": 71.61106659219402,
 "end_elevation_m": 131.6524243371747,
 "endpoint_gain_m": 60.04135774498067,
 "overall_gradient_pct": 1.4323066285745067,
 "accumulated_ascent_m": 136.25399771552878,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.253397213293965,
   "start_distance_m": 341.0,
   "end_distance_m": 346.0,
   "midpoint_distance_m": 343.5,
   "start_elevation_m": 104.63340724766667,
   "end_elevation_m": 106.19607710833137,
   "start_xy": [
    490622.45542676334,
    4897258.578226944
   ],
   "end_xy": [
    490620.8811623701,
    4897263.323929382
   ]
  },
  "max_10m": {
   "gradient_pct": 26.53894494324618,
   "start_distance_m": 573.0,
   "end_distance_m": 583.0,
   "midpoint_distance_m": 578.0,
   "start_elevation_m": 115.77231614000027,
   "end_elevation_m": 118.42621063432489,
   "start_xy": [
    490507.1477691008,
    4897458.5468026055
   ],
   "end_xy": [
    490501.5173818701,
    4897466.811107757
   ]
  },
  "max_20m": {
   "gradient_pct": 23.446823329475777,
   "start_distance_m": 308.0,
   "end_distance_m": 328.0,
   "midpoint_distance_m": 318.0,
   "start_elevation_m": 98.60490130200174,
   "end_elevation_m": 103.29426596789689,
   "start_xy": [
    490617.5863512185,
    4897225.97560239
   ],
   "end_xy": [
    490620.63042230473,
    4897245.742585752
   ]
  },
  "max_25m": {
   "gradient_pct": 21.85381985796505,
   "start_distance_m": 308.0,
   "end_distance_m": 333.0,
   "midpoint_distance_m": 320.5,
   "start_elevation_m": 98.60490130200174,
   "end_elevation_m": 104.068356266493,
   "start_xy": [
    490617.5863512185,
    4897225.97560239
   ],
   "end_xy": [
    490621.3914400763,
    4897250.684331592
   ]
  },
  "max_50m": {
   "gradient_pct": 18.9107992165531,
   "start_distance_m": 307.0,
   "end_distance_m": 357.0,
   "midpoint_distance_m": 332.0,
   "start_elevation_m": 98.45888936190818,
   "end_elevation_m": 107.91428897018473,
   "start_xy": [
    490617.2940750296,
    4897225.047961003
   ],
   "end_xy": [
    490617.417780705,
    4897273.764474743
   ]
  },
  "max_100m": {
   "gradient_pct": 14.828460124320005,
   "start_distance_m": 307.0,
   "end_distance_m": 407.0,
   "midpoint_distance_m": 357.0,
   "start_elevation_m": 98.45888936190818,
   "end_elevation_m": 113.28734948622818,
   "start_xy": [
    490617.2940750296,
    4897225.047961003
   ],
   "end_xy": [
    490597.20911990484,
    4897319.261175536
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -40.783604899885404,
   "start_distance_m": 556.0,
   "end_distance_m": 561.0,
   "midpoint_distance_m": 558.5,
   "start_elevation_m": 117.82584281670032,
   "end_elevation_m": 115.78666257170605,
   "start_xy": [
    490516.719427393,
    4897444.497483849
   ],
   "end_xy": [
    490513.90423377766,
    4897448.629636424
   ]
  },
  "min_10m": {
   "gradient_pct": -23.33519406024891,
   "start_distance_m": 554.0,
   "end_distance_m": 564.0,
   "midpoint_distance_m": 559.0,
   "start_elevation_m": 117.98381954044348,
   "end_elevation_m": 115.65030013441859,
   "start_xy": [
    490517.84550483915,
    4897442.844622818
   ],
   "end_xy": [
    490512.21511760843,
    4897451.108927969
   ]
  },
  "min_20m": {
   "gradient_pct": -13.10978475464644,
   "start_distance_m": 542.0,
   "end_distance_m": 562.0,
   "midpoint_distance_m": 552.0,
   "start_elevation_m": 118.29066544365485,
   "end_elevation_m": 115.66870849272556,
   "start_xy": [
    490524.601969516,
    4897432.927456637
   ],
   "end_xy": [
    490513.3411950546,
    4897449.456066939
   ]
  },
  "min_25m": {
   "gradient_pct": -12.219448856092072,
   "start_distance_m": 1896.0,
   "end_distance_m": 1921.0,
   "midpoint_distance_m": 1908.5,
   "start_elevation_m": 156.08348767180826,
   "end_elevation_m": 153.02862545778524,
   "start_xy": [
    489621.4581318491,
    4898420.027963063
   ],
   "end_xy": [
    489607.7058026647,
    4898440.900448631
   ]
  },
  "min_50m": {
   "gradient_pct": -8.719123707071958,
   "start_distance_m": 520.0,
   "end_distance_m": 570.0,
   "midpoint_distance_m": 545.0,
   "start_elevation_m": 119.68305811030277,
   "end_elevation_m": 115.32349625676679,
   "start_xy": [
    490536.98882142355,
    4897414.745985304
   ],
   "end_xy": [
    490508.83688527,
    4897456.06751106
   ]
  },
  "min_100m": {
   "gradient_pct": -7.867868052900803,
   "start_distance_m": 2202.0,
   "end_distance_m": 2302.0,
   "midpoint_distance_m": 2252.0,
   "start_elevation_m": 139.49590185726706,
   "end_elevation_m": 131.62803380436625,
   "start_xy": [
    489450.42715482326,
    4898673.761838589
   ],
   "end_xy": [
    489394.4561057694,
    4898756.630660638
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.69157400029084,
   "start_distance_m": 341.0,
   "end_distance_m": 343.0,
   "midpoint_distance_m": 342.0,
   "start_elevation_m": 104.63340724766667,
   "end_elevation_m": 105.44723872767248,
   "start_xy": [
    490622.45542676334,
    4897258.578226944
   ],
   "end_xy": [
    490621.825721006,
    4897260.47650792
   ]
  },
  "max_3m": {
   "gradient_pct": 36.073171602704214,
   "start_distance_m": 341.0,
   "end_distance_m": 344.0,
   "midpoint_distance_m": 342.5,
   "start_elevation_m": 104.63340724766667,
   "end_elevation_m": 105.7156023957478,
   "start_xy": [
    490622.45542676334,
    4897258.578226944
   ],
   "end_xy": [
    490621.51086812734,
    4897261.425648407
   ]
  }
 },
 "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": [],
  "suggested_summit_cut_m": 1856.0,
  "trailing_descent_m": 25.0
 },
 "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_x48y490_ME_MidCoast_2021_B21.tif",
   "data/cache/usa/me/USGS_1M_19_x48y491_ME_MidCoast_2021_B21.tif",
   "data/cache/usa/me/USGS_1M_19_x49y490_ME_MidCoast_2021_B21.tif"
  ],
  "calculated_at": "2026-08-24T21:01:26+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-2-260824",
  "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_MidCoast_2021_B21 (collected 2021)",
  "elevation_tile_ids": [
   "x48y490",
   "x48y491",
   "x49y490"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.1% over 200 m (Terrain 50), gain 59.8 m over 4192 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). DEDUPE: absorbed 1 overlapping proposal(s): discovered-lane-44-2291-69-1199 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": "Camden",
  "county": "Maine"
 }
}