{
 "ocl_version": "0.1.0",
 "name": "Randall Hill Road",
 "slug": "randall-hill-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.639755613963587,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 897.0,
   "end_distance_m": 899.0,
   "start_elevation_m": 222.19449530228212,
   "end_elevation_m": 222.6672904145614,
   "min_gradient_pct": -238.9710204672454,
   "suppressed_max_gradient_pct": 240.35459942421795,
   "suppressed_location_m": [
    288.0,
    290.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.507172812430593,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 896.0,
   "end_distance_m": 899.0,
   "start_elevation_m": 221.96207523018847,
   "end_elevation_m": 222.6672904145614,
   "min_gradient_pct": -191.59417871670334,
   "suppressed_max_gradient_pct": 201.11853687654295,
   "suppressed_location_m": [
    288.0,
    291.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.814169690911967,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 895.0,
   "end_distance_m": 900.0,
   "start_elevation_m": 221.74938753684546,
   "end_elevation_m": 222.89009602139106,
   "min_gradient_pct": -126.61133799902245,
   "suppressed_max_gradient_pct": 139.8924044094491,
   "suppressed_location_m": [
    288.0,
    293.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.801619433679207,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 896.0,
   "end_distance_m": 906.0,
   "start_elevation_m": 221.96207523018847,
   "end_elevation_m": 224.1422371735564,
   "min_gradient_pct": -61.877582393996136,
   "suppressed_max_gradient_pct": 82.80650409379462,
   "suppressed_location_m": [
    287.0,
    297.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.000312978891884,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 882.0,
   "end_distance_m": 902.0,
   "start_elevation_m": 219.10680374549753,
   "end_elevation_m": 223.3068663412759,
   "min_gradient_pct": -27.336433160769218,
   "suppressed_max_gradient_pct": 44.93213393898742,
   "suppressed_location_m": [
    287.0,
    307.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.060473555238104,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 882.0,
   "end_distance_m": 907.0,
   "start_elevation_m": 219.10680374549753,
   "end_elevation_m": 224.37192213430706,
   "min_gradient_pct": -20.66128890026357,
   "suppressed_max_gradient_pct": 37.068065244058175,
   "suppressed_location_m": [
    277.0,
    302.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.267809249431537,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 866.0,
   "end_distance_m": 916.0,
   "start_elevation_m": 216.38579881138014,
   "end_elevation_m": 226.0197034360959,
   "min_gradient_pct": -8.556462069237796,
   "suppressed_max_gradient_pct": 22.505102549817313,
   "suppressed_location_m": [
    246.0,
    296.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.091456467454606,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 874.0,
   "end_distance_m": 974.0,
   "start_elevation_m": 217.66829968580439,
   "end_elevation_m": 234.759756153259,
   "min_gradient_pct": -3.738490352683982
  }
 ],
 "shape": {
  "ascent_concentration": 0.376,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 207.0,
  "shape_class": "sustained"
 },
 "length_m": 1296.0253921689496,
 "start_elevation_m": 155.17100400773853,
 "end_elevation_m": 266.6734869094901,
 "endpoint_gain_m": 111.50248290175159,
 "overall_gradient_pct": 8.60341807926678,
 "accumulated_ascent_m": 122.75645030008184,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.814169690911967,
   "start_distance_m": 895.0,
   "end_distance_m": 900.0,
   "midpoint_distance_m": 897.5,
   "start_elevation_m": 221.74938753684546,
   "end_elevation_m": 222.89009602139106,
   "start_xy": [
    706996.4810608152,
    4789573.631981224
   ],
   "end_xy": [
    707001.0134493621,
    4789575.743249577
   ]
  },
  "max_10m": {
   "gradient_pct": 21.801619433679207,
   "start_distance_m": 896.0,
   "end_distance_m": 906.0,
   "midpoint_distance_m": 901.0,
   "start_elevation_m": 221.96207523018847,
   "end_elevation_m": 224.1422371735564,
   "start_xy": [
    706997.3875385246,
    4789574.054234894
   ],
   "end_xy": [
    707006.4523156185,
    4789578.2767716
   ]
  },
  "max_20m": {
   "gradient_pct": 21.000312978891884,
   "start_distance_m": 882.0,
   "end_distance_m": 902.0,
   "midpoint_distance_m": 892.0,
   "start_elevation_m": 219.10680374549753,
   "end_elevation_m": 223.3068663412759,
   "start_xy": [
    706984.3537892618,
    4789568.960359983
   ],
   "end_xy": [
    707002.8264047808,
    4789576.587756918
   ]
  },
  "max_25m": {
   "gradient_pct": 21.060473555238104,
   "start_distance_m": 882.0,
   "end_distance_m": 907.0,
   "midpoint_distance_m": 894.5,
   "start_elevation_m": 219.10680374549753,
   "end_elevation_m": 224.37192213430706,
   "start_xy": [
    706984.3537892618,
    4789568.960359983
   ],
   "end_xy": [
    707007.3587933279,
    4789578.699025271
   ]
  },
  "max_50m": {
   "gradient_pct": 19.267809249431537,
   "start_distance_m": 866.0,
   "end_distance_m": 916.0,
   "midpoint_distance_m": 891.0,
   "start_elevation_m": 216.38579881138014,
   "end_elevation_m": 226.0197034360959,
   "start_xy": [
    706969.3714037132,
    4789563.345369042
   ],
   "end_xy": [
    707015.6342828707,
    4789582.22889926
   ]
  },
  "max_100m": {
   "gradient_pct": 17.091456467454606,
   "start_distance_m": 874.0,
   "end_distance_m": 974.0,
   "midpoint_distance_m": 924.0,
   "start_elevation_m": 217.66829968580439,
   "end_elevation_m": 234.759756153259,
   "start_xy": [
    706976.8625964875,
    4789566.152864513
   ],
   "end_xy": [
    707049.8127536466,
    4789626.761887953
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -126.61133799902245,
   "start_distance_m": 340.0,
   "end_distance_m": 345.0,
   "midpoint_distance_m": 342.5,
   "start_elevation_m": 193.63629096485153,
   "end_elevation_m": 187.3057240649004,
   "start_xy": [
    706836.4716726978,
    4789108.895811687
   ],
   "end_xy": [
    706833.30753462,
    4789112.7672752645
   ]
  },
  "min_10m": {
   "gradient_pct": -61.877582393996136,
   "start_distance_m": 335.0,
   "end_distance_m": 345.0,
   "midpoint_distance_m": 340.0,
   "start_elevation_m": 193.49348230430002,
   "end_elevation_m": 187.3057240649004,
   "start_xy": [
    706839.6358107757,
    4789105.024348111
   ],
   "end_xy": [
    706833.30753462,
    4789112.7672752645
   ]
  },
  "min_20m": {
   "gradient_pct": -27.336433160769218,
   "start_distance_m": 327.0,
   "end_distance_m": 347.0,
   "midpoint_distance_m": 337.0,
   "start_elevation_m": 192.9523283367414,
   "end_elevation_m": 187.48504170458756,
   "start_xy": [
    706844.6984317001,
    4789098.830006388
   ],
   "end_xy": [
    706832.041879389,
    4789114.315860694
   ]
  },
  "min_25m": {
   "gradient_pct": -20.66128890026357,
   "start_distance_m": 331.0,
   "end_distance_m": 356.0,
   "midpoint_distance_m": 343.5,
   "start_elevation_m": 193.25352485548134,
   "end_elevation_m": 188.08820263041545,
   "start_xy": [
    706842.167121238,
    4789101.927177249
   ],
   "end_xy": [
    706826.6788916165,
    4789121.542787869
   ]
  },
  "min_50m": {
   "gradient_pct": -8.556462069237796,
   "start_distance_m": 305.0,
   "end_distance_m": 355.0,
   "midpoint_distance_m": 330.0,
   "start_elevation_m": 192.30946447233453,
   "end_elevation_m": 188.03123343771563,
   "start_xy": [
    706858.6206392425,
    4789081.795566652
   ],
   "end_xy": [
    706827.272718832,
    4789120.738195278
   ]
  },
  "min_100m": {
   "gradient_pct": -3.738490352683982,
   "start_distance_m": 339.0,
   "end_distance_m": 439.0,
   "midpoint_distance_m": 389.0,
   "start_elevation_m": 193.66614383602143,
   "end_elevation_m": 189.92765348333745,
   "start_xy": [
    706837.1045003134,
    4789108.121518972
   ],
   "end_xy": [
    706805.1113540584,
    4789192.766302464
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.639755613963587,
   "start_distance_m": 897.0,
   "end_distance_m": 899.0,
   "midpoint_distance_m": 898.0,
   "start_elevation_m": 222.19449530228212,
   "end_elevation_m": 222.6672904145614,
   "start_xy": [
    706998.2940162339,
    4789574.476488565
   ],
   "end_xy": [
    707000.1069716527,
    4789575.320995906
   ]
  },
  "max_3m": {
   "gradient_pct": 23.507172812430593,
   "start_distance_m": 896.0,
   "end_distance_m": 899.0,
   "midpoint_distance_m": 897.5,
   "start_elevation_m": 221.96207523018847,
   "end_elevation_m": 222.6672904145614,
   "start_xy": [
    706997.3875385246,
    4789574.054234894
   ],
   "end_xy": [
    707000.1069716527,
    4789575.320995906
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.052,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    286.0,
    352.0
   ]
  ],
  "review": [],
  "extent": [
   "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/vt/USGS_1M_18_x70y479_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-04T21:29:24+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": "hunt-wave1-260905",
  "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": [
   "x70y479"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: VT_Statewide_2_A23: no EPT nodes intersect the corridor; VT_Statewide_1_A23: no EPT nodes intersect the corridor",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Rockingham",
  "county": "Vermont"
 }
}