{
 "ocl_version": "0.1.0",
 "name": "Shaw Hill Road",
 "slug": "shaw-hill-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.057220052985116,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 118.0,
   "end_distance_m": 120.0,
   "start_elevation_m": 103.80899064388345,
   "end_elevation_m": 104.25013504494315,
   "min_gradient_pct": -5.181233642584715
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.81062154985322,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 117.0,
   "end_distance_m": 120.0,
   "start_elevation_m": 103.59581639844755,
   "end_elevation_m": 104.25013504494315,
   "min_gradient_pct": -4.765224587557289
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.78781844576207,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 115.0,
   "end_distance_m": 120.0,
   "start_elevation_m": 103.16074412265505,
   "end_elevation_m": 104.25013504494315,
   "min_gradient_pct": -4.516510554708759
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.416208951148263,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 110.0,
   "end_distance_m": 120.0,
   "start_elevation_m": 102.10851414982832,
   "end_elevation_m": 104.25013504494315,
   "min_gradient_pct": -4.254329916187913
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.71706948666062,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 103.0,
   "end_distance_m": 123.0,
   "start_elevation_m": 100.71987913391204,
   "end_elevation_m": 104.86329303124417,
   "min_gradient_pct": -3.772298577418951
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.373128367592813,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 102.0,
   "end_distance_m": 127.0,
   "start_elevation_m": 100.52081755083961,
   "end_elevation_m": 105.61409964273781,
   "min_gradient_pct": -3.5954978008595617
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.732570588562083,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 97.0,
   "end_distance_m": 147.0,
   "start_elevation_m": 99.6551088621058,
   "end_elevation_m": 109.02139415638685,
   "min_gradient_pct": -2.7580243053820084
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.368733825310002,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 99.0,
   "end_distance_m": 199.0,
   "start_elevation_m": 99.96726531041686,
   "end_elevation_m": 117.33599913572687,
   "min_gradient_pct": -1.6724752068156334
  }
 ],
 "shape": {
  "ascent_concentration": 0.467,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 183.0,
  "shape_class": "stepped"
 },
 "length_m": 429.87457410991516,
 "start_elevation_m": 88.87915465839416,
 "end_elevation_m": 126.97739883117642,
 "endpoint_gain_m": 38.09824417278226,
 "overall_gradient_pct": 8.862641911694194,
 "accumulated_ascent_m": 40.02451989542374,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.78781844576207,
   "start_distance_m": 115.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 117.5,
   "start_elevation_m": 103.16074412265505,
   "end_elevation_m": 104.25013504494315,
   "start_xy": [
    369977.9913452692,
    4866794.752792025
   ],
   "end_xy": [
    369982.2833834224,
    4866792.187951193
   ]
  },
  "max_10m": {
   "gradient_pct": 21.416208951148263,
   "start_distance_m": 110.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 115.0,
   "start_elevation_m": 102.10851414982832,
   "end_elevation_m": 104.25013504494315,
   "start_xy": [
    369973.6993071159,
    4866797.317632856
   ],
   "end_xy": [
    369982.2833834224,
    4866792.187951193
   ]
  },
  "max_20m": {
   "gradient_pct": 20.71706948666062,
   "start_distance_m": 103.0,
   "end_distance_m": 123.0,
   "midpoint_distance_m": 113.0,
   "start_elevation_m": 100.71987913391204,
   "end_elevation_m": 104.86329303124417,
   "start_xy": [
    369967.59542010387,
    4866800.738613513
   ],
   "end_xy": [
    369984.85860631434,
    4866790.649046694
   ]
  },
  "max_25m": {
   "gradient_pct": 20.373128367592813,
   "start_distance_m": 102.0,
   "end_distance_m": 127.0,
   "midpoint_distance_m": 114.5,
   "start_elevation_m": 100.52081755083961,
   "end_elevation_m": 105.61409964273781,
   "start_xy": [
    369966.709289013,
    4866801.202048179
   ],
   "end_xy": [
    369988.2922368369,
    4866788.597174029
   ]
  },
  "max_50m": {
   "gradient_pct": 18.732570588562083,
   "start_distance_m": 97.0,
   "end_distance_m": 147.0,
   "midpoint_distance_m": 122.0,
   "start_elevation_m": 99.6551088621058,
   "end_elevation_m": 109.02139415638685,
   "start_xy": [
    369962.2786335586,
    4866803.51922151
   ],
   "end_xy": [
    370006.9002981322,
    4866781.799143834
   ]
  },
  "max_100m": {
   "gradient_pct": 17.368733825310002,
   "start_distance_m": 99.0,
   "end_distance_m": 199.0,
   "midpoint_distance_m": 149.0,
   "start_elevation_m": 99.96726531041686,
   "end_elevation_m": 117.33599913572687,
   "start_xy": [
    369964.05089574034,
    4866802.592352178
   ],
   "end_xy": [
    370058.3607766709,
    4866783.05967917
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.516510554708759,
   "start_distance_m": 376.0,
   "end_distance_m": 381.0,
   "midpoint_distance_m": 378.5,
   "start_elevation_m": 127.83049391169463,
   "end_elevation_m": 127.6046683839592,
   "start_xy": [
    370228.7175141453,
    4866828.415349843
   ],
   "end_xy": [
    370232.9518651754,
    4866831.074348029
   ]
  },
  "min_10m": {
   "gradient_pct": -4.254329916187913,
   "start_distance_m": 376.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 381.0,
   "start_elevation_m": 127.83049391169463,
   "end_elevation_m": 127.40506092007584,
   "start_xy": [
    370228.7175141453,
    4866828.415349843
   ],
   "end_xy": [
    370237.1862162054,
    4866833.733346215
   ]
  },
  "min_20m": {
   "gradient_pct": -3.772298577418951,
   "start_distance_m": 375.0,
   "end_distance_m": 395.0,
   "midpoint_distance_m": 385.0,
   "start_elevation_m": 127.8616078898585,
   "end_elevation_m": 127.10714817437471,
   "start_xy": [
    370227.8706439393,
    4866827.883550205
   ],
   "end_xy": [
    370244.23191749514,
    4866839.315056917
   ]
  },
  "min_25m": {
   "gradient_pct": -3.5954978008595617,
   "start_distance_m": 376.0,
   "end_distance_m": 401.0,
   "midpoint_distance_m": 388.5,
   "start_elevation_m": 127.83049391169463,
   "end_elevation_m": 126.93161946147974,
   "start_xy": [
    370228.7175141453,
    4866828.415349843
   ],
   "end_xy": [
    370248.84839440306,
    4866843.147567969
   ]
  },
  "min_50m": {
   "gradient_pct": -2.7580243053820084,
   "start_distance_m": 352.0,
   "end_distance_m": 402.0,
   "midpoint_distance_m": 377.0,
   "start_elevation_m": 128.29917400994296,
   "end_elevation_m": 126.92016185725195,
   "start_xy": [
    370207.35102206375,
    4866817.616448481
   ],
   "end_xy": [
    370249.617807221,
    4866843.786319811
   ]
  },
  "min_100m": {
   "gradient_pct": -1.6724752068156334,
   "start_distance_m": 325.0,
   "end_distance_m": 425.0,
   "midpoint_distance_m": 375.0,
   "start_elevation_m": 128.4712242890678,
   "end_elevation_m": 126.79874908225217,
   "start_xy": [
    370181.1117219277,
    4866811.293130445
   ],
   "end_xy": [
    370268.3218264217,
    4866857.130537254
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.057220052985116,
   "start_distance_m": 118.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 119.0,
   "start_elevation_m": 103.80899064388345,
   "end_elevation_m": 104.25013504494315,
   "start_xy": [
    369980.5665681611,
    4866793.213887526
   ],
   "end_xy": [
    369982.2833834224,
    4866792.187951193
   ]
  },
  "max_3m": {
   "gradient_pct": 21.81062154985322,
   "start_distance_m": 117.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 118.5,
   "start_elevation_m": 103.59581639844755,
   "end_elevation_m": 104.25013504494315,
   "start_xy": [
    369979.7081605305,
    4866793.726855692
   ],
   "end_xy": [
    369982.2833834224,
    4866792.187951193
   ]
  }
 },
 "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_x36y487_ME_SouthCentral_B22.tif",
   "data/cache/usa/me/USGS_1M_19_x37y487_ME_SouthCentral_B22.tif"
  ],
  "calculated_at": "2026-08-24T20:44:21+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_SouthCentral_B22 (collected 2022)",
  "elevation_tile_ids": [
   "x36y487",
   "x37y487"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 14.7% over 200 m (Terrain 50), gain 38.0 m over 430 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": "Naples",
  "county": "Maine"
 }
}