{
 "ocl_version": "0.1.0",
 "name": "County Road",
 "slug": "county-road",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.550702892652794,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1753.0,
   "end_distance_m": 1755.0,
   "start_elevation_m": 503.9328671479824,
   "end_elevation_m": 504.82388120583545,
   "min_gradient_pct": -37.26767008416232
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 42.69269667402303,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1753.0,
   "end_distance_m": 1756.0,
   "start_elevation_m": 503.9328671479824,
   "end_elevation_m": 505.2136480482031,
   "min_gradient_pct": -34.76025085591724
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 37.50059336775962,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1751.0,
   "end_distance_m": 1756.0,
   "start_elevation_m": 503.3386183798151,
   "end_elevation_m": 505.2136480482031,
   "min_gradient_pct": -29.99904429443177
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.245390911473578,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1751.0,
   "end_distance_m": 1761.0,
   "start_elevation_m": 503.3386183798151,
   "end_elevation_m": 506.16315747096246,
   "min_gradient_pct": -24.6630842384684
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.107621047074133,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1750.0,
   "end_distance_m": 1770.0,
   "start_elevation_m": 503.2419335948027,
   "end_elevation_m": 507.6634578042175,
   "min_gradient_pct": -19.000277843953768
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.7201936724382,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1751.0,
   "end_distance_m": 1776.0,
   "start_elevation_m": 503.3386183798151,
   "end_elevation_m": 508.51866679792465,
   "min_gradient_pct": -17.57703390368806
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.90234575102943,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1730.0,
   "end_distance_m": 1780.0,
   "start_elevation_m": 500.761928749501,
   "end_elevation_m": 509.2131016250157,
   "min_gradient_pct": -17.353742794266054
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.916727520040013,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1736.0,
   "end_distance_m": 1836.0,
   "start_elevation_m": 501.5869838689774,
   "end_elevation_m": 515.5037113890174,
   "min_gradient_pct": -17.06261703614973
  }
 ],
 "shape": {
  "ascent_concentration": 0.534,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 114.0,
  "shape_class": "stepped"
 },
 "length_m": 10198.980783649984,
 "start_elevation_m": 346.3085956832879,
 "end_elevation_m": 499.13879027464435,
 "endpoint_gain_m": 152.83019459135647,
 "overall_gradient_pct": 1.4984849744629287,
 "accumulated_ascent_m": 438.1949584543233,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 37.50059336775962,
   "start_distance_m": 1751.0,
   "end_distance_m": 1756.0,
   "midpoint_distance_m": 1753.5,
   "start_elevation_m": 503.3386183798151,
   "end_elevation_m": 505.2136480482031,
   "start_xy": [
    649278.2779030785,
    4738818.231299671
   ],
   "end_xy": [
    649282.7513950522,
    4738820.33505936
   ]
  },
  "max_10m": {
   "gradient_pct": 28.245390911473578,
   "start_distance_m": 1751.0,
   "end_distance_m": 1761.0,
   "midpoint_distance_m": 1756.0,
   "start_elevation_m": 503.3386183798151,
   "end_elevation_m": 506.16315747096246,
   "start_xy": [
    649278.2779030785,
    4738818.231299671
   ],
   "end_xy": [
    649286.9314025302,
    4738823.078695174
   ]
  },
  "max_20m": {
   "gradient_pct": 22.107621047074133,
   "start_distance_m": 1750.0,
   "end_distance_m": 1770.0,
   "midpoint_distance_m": 1760.0,
   "start_elevation_m": 503.2419335948027,
   "end_elevation_m": 507.6634578042175,
   "start_xy": [
    649277.3166325536,
    4738817.955693108
   ],
   "end_xy": [
    649294.2732338785,
    4738828.273829636
   ]
  },
  "max_25m": {
   "gradient_pct": 20.7201936724382,
   "start_distance_m": 1751.0,
   "end_distance_m": 1776.0,
   "midpoint_distance_m": 1763.5,
   "start_elevation_m": 503.3386183798151,
   "end_elevation_m": 508.51866679792465,
   "start_xy": [
    649278.2779030785,
    4738818.231299671
   ],
   "end_xy": [
    649298.7053253048,
    4738832.301553031
   ]
  },
  "max_50m": {
   "gradient_pct": 16.90234575102943,
   "start_distance_m": 1730.0,
   "end_distance_m": 1780.0,
   "midpoint_distance_m": 1755.0,
   "start_elevation_m": 500.761928749501,
   "end_elevation_m": 509.2131016250157,
   "start_xy": [
    649261.7617809062,
    4738828.3011504095
   ],
   "end_xy": [
    649301.5428197684,
    4738835.120883655
   ]
  },
  "max_100m": {
   "gradient_pct": 13.916727520040013,
   "start_distance_m": 1736.0,
   "end_distance_m": 1836.0,
   "midpoint_distance_m": 1786.0,
   "start_elevation_m": 501.5869838689774,
   "end_elevation_m": 515.5037113890174,
   "start_xy": [
    649265.6107175091,
    4738823.701554905
   ],
   "end_xy": [
    649335.5137462823,
    4738879.009573639
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -29.99904429443177,
   "start_distance_m": 4398.0,
   "end_distance_m": 4403.0,
   "midpoint_distance_m": 4400.5,
   "start_elevation_m": 603.749362900678,
   "end_elevation_m": 602.2494106859564,
   "start_xy": [
    651487.4346316118,
    4738234.373221189
   ],
   "end_xy": [
    651491.5136973143,
    4738231.483809309
   ]
  },
  "min_10m": {
   "gradient_pct": -24.6630842384684,
   "start_distance_m": 4398.0,
   "end_distance_m": 4408.0,
   "midpoint_distance_m": 4403.0,
   "start_elevation_m": 603.749362900678,
   "end_elevation_m": 601.2830544768311,
   "start_xy": [
    651487.4346316118,
    4738234.373221189
   ],
   "end_xy": [
    651495.8842157334,
    4738229.055112385
   ]
  },
  "min_20m": {
   "gradient_pct": -19.000277843953768,
   "start_distance_m": 4389.0,
   "end_distance_m": 4409.0,
   "midpoint_distance_m": 4399.0,
   "start_elevation_m": 604.9160265404051,
   "end_elevation_m": 601.1159709716144,
   "start_xy": [
    651480.5622861524,
    4738240.164966967
   ],
   "end_xy": [
    651496.7612376394,
    4738228.575940013
   ]
  },
  "min_25m": {
   "gradient_pct": -17.57703390368806,
   "start_distance_m": 8300.0,
   "end_distance_m": 8325.0,
   "midpoint_distance_m": 8312.5,
   "start_elevation_m": 621.0511513695471,
   "end_elevation_m": 616.6568928936251,
   "start_xy": [
    654950.7438560644,
    4737461.471939723
   ],
   "end_xy": [
    654975.6863137814,
    4737460.902644176
   ]
  },
  "min_50m": {
   "gradient_pct": -17.353742794266054,
   "start_distance_m": 8280.0,
   "end_distance_m": 8330.0,
   "midpoint_distance_m": 8305.0,
   "start_elevation_m": 624.4752289851546,
   "end_elevation_m": 615.7983575880215,
   "start_xy": [
    654931.1761152149,
    4737457.467888738
   ],
   "end_xy": [
    654980.6023989915,
    4737459.9904456185
   ]
  },
  "min_100m": {
   "gradient_pct": -17.06261703614973,
   "start_distance_m": 8273.0,
   "end_distance_m": 8373.0,
   "midpoint_distance_m": 8323.0,
   "start_elevation_m": 625.5928514611649,
   "end_elevation_m": 608.5302344250151,
   "start_xy": [
    654924.5027138309,
    4737455.37770637
   ],
   "end_xy": [
    655021.7358314382,
    4737447.624360479
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.550702892652794,
   "start_distance_m": 1753.0,
   "end_distance_m": 1755.0,
   "midpoint_distance_m": 1754.0,
   "start_elevation_m": 503.9328671479824,
   "end_elevation_m": 504.82388120583545,
   "start_xy": [
    649280.2004441282,
    4738818.782512799
   ],
   "end_xy": [
    649281.9153935566,
    4738819.786332197
   ]
  },
  "max_3m": {
   "gradient_pct": 42.69269667402303,
   "start_distance_m": 1753.0,
   "end_distance_m": 1756.0,
   "midpoint_distance_m": 1754.5,
   "start_elevation_m": 503.9328671479824,
   "end_elevation_m": 505.2136480482031,
   "start_xy": [
    649280.2004441282,
    4738818.782512799
   ],
   "end_xy": [
    649282.7513950522,
    4738820.33505936
   ]
  }
 },
 "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": [
   "short_window_divergence"
  ],
  "extent": [
   "may_start_earlier",
   "descends_at_end"
  ],
  "suggested_summit_cut_m": 6230.0,
  "trailing_descent_m": 208.2
 },
 "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_x64y474_VT_Statewide_A23.tif",
   "data/cache/usa/vt/USGS_1M_18_x64y475_VT_Statewide_A23.tif",
   "data/cache/usa/vt/USGS_1M_18_x65y474_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T23:20:10+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": [
   "x64y474",
   "x64y475",
   "x65y474"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 14.9% over 200 m (Terrain 50), gain 100.4 m over 9557 m way. EXTENDED by graph walk: +2 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 2 overlapping proposal(s): county-road, schenkar-road 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 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": "Pownal",
  "county": "Vermont"
 }
}