{
 "ocl_version": "0.1.0",
 "name": "Bray Hill Road",
 "slug": "bray-hill-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.591769528199166,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 224.0,
   "end_distance_m": 226.0,
   "start_elevation_m": 366.2282151116194,
   "end_elevation_m": 367.1200505021834,
   "min_gradient_pct": -38.927160166193175
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 40.676297924619575,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 224.0,
   "end_distance_m": 227.0,
   "start_elevation_m": 366.2282151116194,
   "end_elevation_m": 367.448504049358,
   "min_gradient_pct": -32.552435921331835
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 37.42942184628305,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 224.0,
   "end_distance_m": 229.0,
   "start_elevation_m": 366.2282151116194,
   "end_elevation_m": 368.0996862039336,
   "min_gradient_pct": -21.25445820745199
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 31.424160016246674,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 224.0,
   "end_distance_m": 234.0,
   "start_elevation_m": 366.2282151116194,
   "end_elevation_m": 369.3706311132441,
   "min_gradient_pct": -13.765912255217927
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 27.746503616253335,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 213.0,
   "end_distance_m": 233.0,
   "start_elevation_m": 363.5894753983241,
   "end_elevation_m": 369.1387761215748,
   "min_gradient_pct": -13.605205813832981
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 27.226546653701234,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 212.0,
   "end_distance_m": 237.0,
   "start_elevation_m": 363.2918016332354,
   "end_elevation_m": 370.09843829666073,
   "min_gradient_pct": -13.44154927459249
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 24.017719257114777,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 209.0,
   "end_distance_m": 259.0,
   "start_elevation_m": 362.8607204457816,
   "end_elevation_m": 374.869580074339,
   "min_gradient_pct": -12.313022496910207
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.344928763410053,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 179.0,
   "end_distance_m": 279.0,
   "start_elevation_m": 358.29898208131857,
   "end_elevation_m": 377.6439108447286,
   "min_gradient_pct": -9.845936370624429
  }
 ],
 "shape": {
  "ascent_concentration": 0.425,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 131.0,
  "shape_class": "sustained"
 },
 "length_m": 2930.574358817932,
 "start_elevation_m": 339.73699429200525,
 "end_elevation_m": 487.20960730438327,
 "endpoint_gain_m": 147.47261301237802,
 "overall_gradient_pct": 5.032208535116719,
 "accumulated_ascent_m": 181.72879723248582,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 37.42942184628305,
   "start_distance_m": 224.0,
   "end_distance_m": 229.0,
   "midpoint_distance_m": 226.5,
   "start_elevation_m": 366.2282151116194,
   "end_elevation_m": 368.0996862039336,
   "start_xy": [
    391775.6716882971,
    4970913.183071372
   ],
   "end_xy": [
    391777.743881323,
    4970917.733457737
   ]
  },
  "max_10m": {
   "gradient_pct": 31.424160016246674,
   "start_distance_m": 224.0,
   "end_distance_m": 234.0,
   "midpoint_distance_m": 229.0,
   "start_elevation_m": 366.2282151116194,
   "end_elevation_m": 369.3706311132441,
   "start_xy": [
    391775.6716882971,
    4970913.183071372
   ],
   "end_xy": [
    391779.81607434887,
    4970922.283844101
   ]
  },
  "max_20m": {
   "gradient_pct": 27.746503616253335,
   "start_distance_m": 213.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 223.0,
   "start_elevation_m": 363.5894753983241,
   "end_elevation_m": 369.1387761215748,
   "start_xy": [
    391771.1128636402,
    4970903.172221371
   ],
   "end_xy": [
    391779.40163574374,
    4970921.373766828
   ]
  },
  "max_25m": {
   "gradient_pct": 27.226546653701234,
   "start_distance_m": 212.0,
   "end_distance_m": 237.0,
   "midpoint_distance_m": 224.5,
   "start_elevation_m": 363.2918016332354,
   "end_elevation_m": 370.09843829666073,
   "start_xy": [
    391770.698425035,
    4970902.262144098
   ],
   "end_xy": [
    391781.0593901644,
    4970925.014075919
   ]
  },
  "max_50m": {
   "gradient_pct": 24.017719257114777,
   "start_distance_m": 209.0,
   "end_distance_m": 259.0,
   "midpoint_distance_m": 234.0,
   "start_elevation_m": 362.8607204457816,
   "end_elevation_m": 374.869580074339,
   "start_xy": [
    391769.4551092195,
    4970899.53191228
   ],
   "end_xy": [
    391790.17703947827,
    4970945.035775922
   ]
  },
  "max_100m": {
   "gradient_pct": 19.344928763410053,
   "start_distance_m": 179.0,
   "end_distance_m": 279.0,
   "midpoint_distance_m": 229.0,
   "start_elevation_m": 358.29898208131857,
   "end_elevation_m": 377.6439108447286,
   "start_xy": [
    391757.02195106423,
    4970872.229594095
   ],
   "end_xy": [
    391798.4658115818,
    4970963.237321379
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -21.25445820745199,
   "start_distance_m": 1178.0,
   "end_distance_m": 1183.0,
   "midpoint_distance_m": 1180.5,
   "start_elevation_m": 431.0840243383751,
   "end_elevation_m": 430.0213014280025,
   "start_xy": [
    392266.00516420475,
    4971663.378011541
   ],
   "end_xy": [
    392270.58153343754,
    4971665.3921725685
   ]
  },
  "min_10m": {
   "gradient_pct": -13.765912255217927,
   "start_distance_m": 1807.0,
   "end_distance_m": 1817.0,
   "midpoint_distance_m": 1812.0,
   "start_elevation_m": 430.4787573737654,
   "end_elevation_m": 429.1021661482436,
   "start_xy": [
    392836.8333557439,
    4971927.248912078
   ],
   "end_xy": [
    392845.93197073025,
    4971931.3980331095
   ]
  },
  "min_20m": {
   "gradient_pct": -13.605205813832981,
   "start_distance_m": 1798.0,
   "end_distance_m": 1818.0,
   "midpoint_distance_m": 1808.0,
   "start_elevation_m": 431.6964133013539,
   "end_elevation_m": 428.9753721385873,
   "start_xy": [
    392828.64460225624,
    4971923.514703151
   ],
   "end_xy": [
    392846.8418322289,
    4971931.812945212
   ]
  },
  "min_25m": {
   "gradient_pct": -13.44154927459249,
   "start_distance_m": 1794.0,
   "end_distance_m": 1819.0,
   "midpoint_distance_m": 1806.5,
   "start_elevation_m": 432.20919975762865,
   "end_elevation_m": 428.84881243898053,
   "start_xy": [
    392825.0051562617,
    4971921.855054738
   ],
   "end_xy": [
    392847.7516937275,
    4971932.227857316
   ]
  },
  "min_50m": {
   "gradient_pct": -12.313022496910207,
   "start_distance_m": 1779.0,
   "end_distance_m": 1829.0,
   "midpoint_distance_m": 1804.0,
   "start_elevation_m": 433.8554244417958,
   "end_elevation_m": 427.6989131933407,
   "start_xy": [
    392811.35723378224,
    4971915.631373191
   ],
   "end_xy": [
    392856.8503087138,
    4971936.376978347
   ]
  },
  "min_100m": {
   "gradient_pct": -9.845936370624429,
   "start_distance_m": 1743.0,
   "end_distance_m": 1843.0,
   "midpoint_distance_m": 1793.0,
   "start_elevation_m": 436.46069009617855,
   "end_elevation_m": 426.6147537255541,
   "start_xy": [
    392778.6022198315,
    4971900.694537479
   ],
   "end_xy": [
    392869.58836969465,
    4971942.18574779
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.591769528199166,
   "start_distance_m": 224.0,
   "end_distance_m": 226.0,
   "midpoint_distance_m": 225.0,
   "start_elevation_m": 366.2282151116194,
   "end_elevation_m": 367.1200505021834,
   "start_xy": [
    391775.6716882971,
    4970913.183071372
   ],
   "end_xy": [
    391776.5005655075,
    4970915.003225918
   ]
  },
  "max_3m": {
   "gradient_pct": 40.676297924619575,
   "start_distance_m": 224.0,
   "end_distance_m": 227.0,
   "midpoint_distance_m": 225.5,
   "start_elevation_m": 366.2282151116194,
   "end_elevation_m": 367.448504049358,
   "start_xy": [
    391775.6716882971,
    4970913.183071372
   ],
   "end_xy": [
    391776.91500411264,
    4970915.913303191
   ]
  }
 },
 "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",
   "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/me/USGS_1M_19_x39y498_ME_WesternMtns_B24.tif"
  ],
  "calculated_at": "2026-08-24T20:40:54+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-1-260824",
  "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_WesternMtns_B24 (collected 2024)",
  "elevation_tile_ids": [
   "x39y498"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.5% over 200 m (Terrain 50), gain 147.5 m over 2931 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). ADOPTED (NE wave 1, 2026-08-25): clean-steep,qualified-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": "Phillips",
  "county": "Maine"
 }
}