{
 "ocl_version": "0.1.0",
 "name": "Cold Springs Road",
 "slug": "cold-springs-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.081338046094075,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 161.0,
   "end_distance_m": 163.0,
   "start_elevation_m": 59.01735687211784,
   "end_elevation_m": 59.61898363303972,
   "min_gradient_pct": -17.400079489432585
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.405208503249213,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 168.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 60.80935075736416,
   "end_elevation_m": 61.661507012461634,
   "min_gradient_pct": -15.28989975740842
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.10930130032048,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 167.0,
   "end_distance_m": 172.0,
   "start_elevation_m": 60.56758556639313,
   "end_elevation_m": 61.97305063140915,
   "min_gradient_pct": -15.000075035804343
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.61408046157632,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 162.0,
   "end_distance_m": 172.0,
   "start_elevation_m": 59.31164258525152,
   "end_elevation_m": 61.97305063140915,
   "min_gradient_pct": -13.664320015982128
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.024181755400505,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 152.0,
   "end_distance_m": 172.0,
   "start_elevation_m": 56.96821428032905,
   "end_elevation_m": 61.97305063140915,
   "min_gradient_pct": -12.665774911136936
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.235000334042752,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 151.0,
   "end_distance_m": 176.0,
   "start_elevation_m": 56.73634340633083,
   "end_elevation_m": 62.79509348984152,
   "min_gradient_pct": -12.448680945821764
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.88199527663106,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 127.0,
   "end_distance_m": 177.0,
   "start_elevation_m": 52.581819418777776,
   "end_elevation_m": 63.022817057093306,
   "min_gradient_pct": -11.148261572431378
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.779486283549957,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 81.0,
   "end_distance_m": 181.0,
   "start_elevation_m": 44.885214878378704,
   "end_elevation_m": 63.66470116192866,
   "min_gradient_pct": -7.6384081244777065
  }
 ],
 "shape": {
  "ascent_concentration": 0.598,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 212.0,
  "shape_class": "stepped"
 },
 "length_m": 2095.8340204428478,
 "start_elevation_m": 32.72481673164746,
 "end_elevation_m": 111.73367305832389,
 "endpoint_gain_m": 79.00885632667644,
 "overall_gradient_pct": 3.7698050301703727,
 "accumulated_ascent_m": 113.52199839349525,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.10930130032048,
   "start_distance_m": 167.0,
   "end_distance_m": 172.0,
   "midpoint_distance_m": 169.5,
   "start_elevation_m": 60.56758556639313,
   "end_elevation_m": 61.97305063140915,
   "start_xy": [
    628530.0267292346,
    4836596.141015005
   ],
   "end_xy": [
    628532.1937438108,
    4836600.647016318
   ]
  },
  "max_10m": {
   "gradient_pct": 26.61408046157632,
   "start_distance_m": 162.0,
   "end_distance_m": 172.0,
   "midpoint_distance_m": 167.0,
   "start_elevation_m": 59.31164258525152,
   "end_elevation_m": 61.97305063140915,
   "start_xy": [
    628527.8597146585,
    4836591.635013693
   ],
   "end_xy": [
    628532.1937438108,
    4836600.647016318
   ]
  },
  "max_20m": {
   "gradient_pct": 25.024181755400505,
   "start_distance_m": 152.0,
   "end_distance_m": 172.0,
   "midpoint_distance_m": 162.0,
   "start_elevation_m": 56.96821428032905,
   "end_elevation_m": 61.97305063140915,
   "start_xy": [
    628524.7718224576,
    4836582.20096781
   ],
   "end_xy": [
    628532.1937438108,
    4836600.647016318
   ]
  },
  "max_25m": {
   "gradient_pct": 24.235000334042752,
   "start_distance_m": 151.0,
   "end_distance_m": 176.0,
   "midpoint_distance_m": 163.5,
   "start_elevation_m": 56.73634340633083,
   "end_elevation_m": 62.79509348984152,
   "start_xy": [
    628524.5684055127,
    4836581.221875605
   ],
   "end_xy": [
    628533.9273554716,
    4836604.251817368
   ]
  },
  "max_50m": {
   "gradient_pct": 20.88199527663106,
   "start_distance_m": 127.0,
   "end_distance_m": 177.0,
   "midpoint_distance_m": 152.0,
   "start_elevation_m": 52.581819418777776,
   "end_elevation_m": 63.022817057093306,
   "start_xy": [
    628516.9007796146,
    4836558.728430664
   ],
   "end_xy": [
    628534.3607583868,
    4836605.15301763
   ]
  },
  "max_100m": {
   "gradient_pct": 18.779486283549957,
   "start_distance_m": 81.0,
   "end_distance_m": 181.0,
   "midpoint_distance_m": 131.0,
   "start_elevation_m": 44.885214878378704,
   "end_elevation_m": 63.66470116192866,
   "start_xy": [
    628472.0902934229,
    4836560.312217928
   ],
   "end_xy": [
    628536.0943700477,
    4836608.75781868
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -15.000075035804343,
   "start_distance_m": 925.0,
   "end_distance_m": 930.0,
   "midpoint_distance_m": 927.5,
   "start_elevation_m": 119.32411436557652,
   "end_elevation_m": 118.5741106137863,
   "start_xy": [
    629141.4239904119,
    4836928.957678591
   ],
   "end_xy": [
    629146.1931923013,
    4836930.459248882
   ]
  },
  "min_10m": {
   "gradient_pct": -13.664320015982128,
   "start_distance_m": 924.0,
   "end_distance_m": 934.0,
   "midpoint_distance_m": 929.0,
   "start_elevation_m": 119.45422005817935,
   "end_elevation_m": 118.08778805658113,
   "start_xy": [
    629140.4701500341,
    4836928.657364533
   ],
   "end_xy": [
    629150.0085538129,
    4836931.660505114
   ]
  },
  "min_20m": {
   "gradient_pct": -12.665774911136936,
   "start_distance_m": 1430.0,
   "end_distance_m": 1450.0,
   "midpoint_distance_m": 1440.0,
   "start_elevation_m": 114.74186297231694,
   "end_elevation_m": 112.20870799008955,
   "start_xy": [
    629585.444329184,
    4837148.444188493
   ],
   "end_xy": [
    629601.367490656,
    4837160.537295729
   ]
  },
  "min_25m": {
   "gradient_pct": -12.448680945821764,
   "start_distance_m": 1431.0,
   "end_distance_m": 1456.0,
   "midpoint_distance_m": 1443.5,
   "start_elevation_m": 114.61857964849659,
   "end_elevation_m": 111.50640941204115,
   "start_xy": [
    629586.2193238795,
    4837149.07340821
   ],
   "end_xy": [
    629606.4390484194,
    4837163.743430763
   ]
  },
  "min_50m": {
   "gradient_pct": -11.148261572431378,
   "start_distance_m": 1416.0,
   "end_distance_m": 1466.0,
   "midpoint_distance_m": 1441.0,
   "start_elevation_m": 115.97148794988392,
   "end_elevation_m": 110.39735716366823,
   "start_xy": [
    629575.6495409184,
    4837138.441082834
   ],
   "end_xy": [
    629614.8916446917,
    4837169.086989151
   ]
  },
  "min_100m": {
   "gradient_pct": -7.6384081244777065,
   "start_distance_m": 1378.0,
   "end_distance_m": 1478.0,
   "midpoint_distance_m": 1428.0,
   "start_elevation_m": 117.66684890740785,
   "end_elevation_m": 110.02844078293015,
   "start_xy": [
    629549.4645886113,
    4837110.914238127
   ],
   "end_xy": [
    629623.9493721758,
    4837176.920931803
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.081338046094075,
   "start_distance_m": 161.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 162.0,
   "start_elevation_m": 59.01735687211784,
   "end_elevation_m": 59.61898363303972,
   "start_xy": [
    628527.4263117433,
    4836590.73381343
   ],
   "end_xy": [
    628528.2931175737,
    4836592.536213956
   ]
  },
  "max_3m": {
   "gradient_pct": 28.405208503249213,
   "start_distance_m": 168.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 169.5,
   "start_elevation_m": 60.80935075736416,
   "end_elevation_m": 61.661507012461634,
   "start_xy": [
    628530.4601321499,
    4836597.042215268
   ],
   "end_xy": [
    628531.7603408955,
    4836599.745816055
   ]
  }
 },
 "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"
  ],
  "suggested_summit_cut_m": 1194.0,
  "trailing_descent_m": 9.9
 },
 "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/vt/USGS_1M_18_x62y484_VT_Statewide_A23.tif",
   "data/cache/usa/vt/USGS_1M_18_x63y484_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T22:10:36+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/vermont-260821.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-vt-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, VT_Statewide_A23 (collected 2023)",
  "elevation_tile_ids": [
   "x62y484",
   "x63y484"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.8% over 200 m (Terrain 50), gain 73.4 m over 2053 m way. EXTENDED by graph walk: +1 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "canopy_check": "unavailable \u2014 EPT corridor failed: VT_Statewide_2_A23: no corridor points fetched; VT_Statewide_1_A23: no EPT nodes intersect the corridor",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "West Haven",
  "county": "Vermont"
 }
}