{
 "ocl_version": "0.1.0",
 "name": "Mount Washington Road",
 "slug": "mount-washington-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 56.97993749224963,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 323.0,
   "end_distance_m": 325.0,
   "start_elevation_m": 291.26754710233917,
   "end_elevation_m": 292.40714585218416,
   "min_gradient_pct": -11.626683225540546
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 50.17104683179999,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 323.0,
   "end_distance_m": 326.0,
   "start_elevation_m": 291.26754710233917,
   "end_elevation_m": 292.77267850729316,
   "min_gradient_pct": -10.910315057223366
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 42.57263506131608,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 745.0,
   "end_distance_m": 750.0,
   "start_elevation_m": 328.74358498325273,
   "end_elevation_m": 330.87221673631853,
   "min_gradient_pct": -9.190656694902373
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 36.45844873663634,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 743.0,
   "end_distance_m": 753.0,
   "start_elevation_m": 327.9873413324044,
   "end_elevation_m": 331.63318620606805,
   "min_gradient_pct": -7.810017616693017
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 30.355136868269028,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 698.0,
   "end_distance_m": 718.0,
   "start_elevation_m": 317.43904310592376,
   "end_elevation_m": 323.51007047957756,
   "min_gradient_pct": -4.309911006896243
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 27.83407373627915,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 695.0,
   "end_distance_m": 720.0,
   "start_elevation_m": 316.8386165285736,
   "end_elevation_m": 323.7971349626434,
   "min_gradient_pct": -3.2803719499545423
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 26.270445357375706,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 702.0,
   "end_distance_m": 752.0,
   "start_elevation_m": 318.23565338355064,
   "end_elevation_m": 331.3708760622385,
   "min_gradient_pct": -1.423011436879733
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.900411620606466,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 904.0,
   "end_distance_m": 1004.0,
   "start_elevation_m": 359.69524960261896,
   "end_elevation_m": 382.5956612232254,
   "min_gradient_pct": 2.410587894529783
  }
 ],
 "shape": {
  "ascent_concentration": 0.438,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 348.0,
  "shape_class": "sustained"
 },
 "length_m": 1004.3271113749271,
 "start_elevation_m": 264.2715654552415,
 "end_elevation_m": 382.68335213270706,
 "endpoint_gain_m": 118.41178667746556,
 "overall_gradient_pct": 11.790161326558179,
 "accumulated_ascent_m": 120.89394284561723,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 42.57263506131608,
   "start_distance_m": 745.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 747.5,
   "start_elevation_m": 328.74358498325273,
   "end_elevation_m": 330.87221673631853,
   "start_xy": [
    629725.4276283139,
    4657422.245775539
   ],
   "end_xy": [
    629720.4579662394,
    4657422.795738143
   ]
  },
  "max_10m": {
   "gradient_pct": 36.45844873663634,
   "start_distance_m": 743.0,
   "end_distance_m": 753.0,
   "midpoint_distance_m": 748.0,
   "start_elevation_m": 327.9873413324044,
   "end_elevation_m": 331.63318620606805,
   "start_xy": [
    629727.4153833278,
    4657422.02480265
   ],
   "end_xy": [
    629717.4761919049,
    4657423.125922232
   ]
  },
  "max_20m": {
   "gradient_pct": 30.355136868269028,
   "start_distance_m": 698.0,
   "end_distance_m": 718.0,
   "midpoint_distance_m": 708.0,
   "start_elevation_m": 317.43904310592376,
   "end_elevation_m": 323.51007047957756,
   "start_xy": [
    629766.4353253593,
    4657399.799859798
   ],
   "end_xy": [
    629748.4524336972,
    4657408.552066012
   ]
  },
  "max_25m": {
   "gradient_pct": 27.83407373627915,
   "start_distance_m": 695.0,
   "end_distance_m": 720.0,
   "midpoint_distance_m": 707.5,
   "start_elevation_m": 316.8386165285736,
   "end_elevation_m": 323.7971349626434,
   "start_xy": [
    629769.1332427828,
    4657398.487899893
   ],
   "end_xy": [
    629746.7552807489,
    4657409.610144635
   ]
  },
  "max_50m": {
   "gradient_pct": 26.270445357375706,
   "start_distance_m": 702.0,
   "end_distance_m": 752.0,
   "midpoint_distance_m": 727.0,
   "start_elevation_m": 318.23565338355064,
   "end_elevation_m": 331.3708760622385,
   "start_xy": [
    629762.8378579245,
    4657401.548637471
   ],
   "end_xy": [
    629718.4701025909,
    4657423.015733852
   ]
  },
  "max_100m": {
   "gradient_pct": 22.900411620606466,
   "start_distance_m": 904.0,
   "end_distance_m": 1004.0,
   "midpoint_distance_m": 954.0,
   "start_elevation_m": 359.69524960261896,
   "end_elevation_m": 382.5956612232254,
   "start_xy": [
    629644.2404425768,
    4657414.317782972
   ],
   "end_xy": [
    629555.4388677872,
    4657452.257246207
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.190656694902373,
   "start_distance_m": 4.0,
   "end_distance_m": 9.0,
   "midpoint_distance_m": 6.5,
   "start_elevation_m": 264.0111488926998,
   "end_elevation_m": 263.5516160579547,
   "start_xy": [
    630037.0427981478,
    4656854.187021098
   ],
   "end_xy": [
    630032.0700144293,
    4656854.707998492
   ]
  },
  "min_10m": {
   "gradient_pct": -7.810017616693017,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 264.2715654552415,
   "end_elevation_m": 263.4905636935722,
   "start_xy": [
    630041.021,
    4656853.77
   ],
   "end_xy": [
    630031.0755363918,
    4656854.812943396
   ]
  },
  "min_20m": {
   "gradient_pct": -4.309911006896243,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 264.2715654552415,
   "end_elevation_m": 263.40958325386225,
   "start_xy": [
    630041.021,
    4656853.77
   ],
   "end_xy": [
    630021.0788924195,
    4656854.860995569
   ]
  },
  "min_25m": {
   "gradient_pct": -3.2803719499545423,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 264.2715654552415,
   "end_elevation_m": 263.45147246775286,
   "start_xy": [
    630041.021,
    4656853.77
   ],
   "end_xy": [
    630016.0789289153,
    4656854.841996787
   ]
  },
  "min_50m": {
   "gradient_pct": -1.423011436879733,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 264.2715654552415,
   "end_elevation_m": 263.56005973680163,
   "start_xy": [
    630041.021,
    4656853.77
   ],
   "end_xy": [
    629991.1339189389,
    4656856.260043702
   ]
  },
  "min_100m": {
   "gradient_pct": 2.410587894529783,
   "start_distance_m": 488.0,
   "end_distance_m": 588.0,
   "midpoint_distance_m": 538.0,
   "start_elevation_m": 305.3543005247696,
   "end_elevation_m": 307.7648884192994,
   "start_xy": [
    629833.6029409566,
    4657216.32791825
   ],
   "end_xy": [
    629831.0005639754,
    4657315.688223153
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 56.97993749224963,
   "start_distance_m": 323.0,
   "end_distance_m": 325.0,
   "midpoint_distance_m": 324.0,
   "start_elevation_m": 291.26754710233917,
   "end_elevation_m": 292.40714585218416,
   "start_xy": [
    629869.7455247646,
    4657055.926356422
   ],
   "end_xy": [
    629869.4404385032,
    4657057.902949806
   ]
  },
  "max_3m": {
   "gradient_pct": 50.17104683179999,
   "start_distance_m": 323.0,
   "end_distance_m": 326.0,
   "midpoint_distance_m": 324.5,
   "start_elevation_m": 291.26754710233917,
   "end_elevation_m": 292.77267850729316,
   "start_xy": [
    629869.7455247646,
    4657055.926356422
   ],
   "end_xy": [
    629869.2875848267,
    4657058.891198626
   ]
  }
 },
 "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": [
   "descends_at_start",
   "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/ma/USGS_1M_18_x62y466_MA_Western_B24.tif",
   "data/cache/usa/ma/USGS_1M_18_x63y466_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-09-03T19:17:53+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/mount-washington-road/mount-washington-road.geojson",
  "run_id": "canopy-all-260903",
  "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, MA_Western_B24 (collected 2023-24)",
  "elevation_tile_ids": [
   "x62y466",
   "x63y466"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: NY_HudsonRiverRegion_1_2020: no corridor points fetched; NY_Hudson_1_D22: no corridor points fetched",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Sheffield",
  "county": "Massachusetts"
 }
}