{
 "ocl_version": "0.1.0",
 "name": "Evans Road",
 "slug": "evans-road",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 48.82793900473246,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1.0,
   "end_distance_m": 3.0,
   "start_elevation_m": 268.74685969035744,
   "end_elevation_m": 269.7234184704521,
   "min_gradient_pct": -8.263770617114119
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 45.00282516697022,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 3.0,
   "start_elevation_m": 268.373333715443,
   "end_elevation_m": 269.7234184704521,
   "min_gradient_pct": -7.259403280949073
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 36.166257180314005,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "start_elevation_m": 268.373333715443,
   "end_elevation_m": 270.1816465744587,
   "min_gradient_pct": -6.408627788763397
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.711219368781485,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "start_elevation_m": 268.373333715443,
   "end_elevation_m": 270.84445565232113,
   "min_gradient_pct": -2.734998211686843
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.644964087426956,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 126.0,
   "end_distance_m": 146.0,
   "start_elevation_m": 284.372164541913,
   "end_elevation_m": 289.10115735939837,
   "min_gradient_pct": 3.4180957136337042
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.327674255931925,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 125.0,
   "end_distance_m": 150.0,
   "start_elevation_m": 284.2026260901638,
   "end_elevation_m": 289.78454465414677,
   "min_gradient_pct": 5.140863395364477
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.773683215486585,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 23.0,
   "end_distance_m": 73.0,
   "start_elevation_m": 272.8509422718331,
   "end_elevation_m": 281.2377838795764,
   "min_gradient_pct": 5.5046848667781205
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.36919021716443,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "start_elevation_m": 268.373333715443,
   "end_elevation_m": 282.7425239326074,
   "min_gradient_pct": 9.529351100658232
  }
 ],
 "shape": {
  "ascent_concentration": 0.301,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 115.0,
  "shape_class": "sustained"
 },
 "length_m": 363.24931406543385,
 "start_elevation_m": 268.373333715443,
 "end_elevation_m": 313.9977052020282,
 "endpoint_gain_m": 45.62437148658523,
 "overall_gradient_pct": 12.560070926484032,
 "accumulated_ascent_m": 46.52260795714841,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 36.166257180314005,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 268.373333715443,
   "end_elevation_m": 270.1816465744587,
   "start_xy": [
    697160.936,
    4758535.451
   ],
   "end_xy": [
    697155.9418120326,
    4758535.692011508
   ]
  },
  "max_10m": {
   "gradient_pct": 24.711219368781485,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 268.373333715443,
   "end_elevation_m": 270.84445565232113,
   "start_xy": [
    697160.936,
    4758535.451
   ],
   "end_xy": [
    697150.9476240653,
    4758535.933023016
   ]
  },
  "max_20m": {
   "gradient_pct": 23.644964087426956,
   "start_distance_m": 126.0,
   "end_distance_m": 146.0,
   "midpoint_distance_m": 136.0,
   "start_elevation_m": 284.372164541913,
   "end_elevation_m": 289.10115735939837,
   "start_xy": [
    697035.0279120717,
    4758535.993140271
   ],
   "end_xy": [
    697015.0485993657,
    4758535.083709793
   ]
  },
  "max_25m": {
   "gradient_pct": 22.327674255931925,
   "start_distance_m": 125.0,
   "end_distance_m": 150.0,
   "midpoint_distance_m": 137.5,
   "start_elevation_m": 284.2026260901638,
   "end_elevation_m": 289.78454465414677,
   "start_xy": [
    697036.026877707,
    4758536.038611796
   ],
   "end_xy": [
    697011.0537672144,
    4758534.882701326
   ]
  },
  "max_50m": {
   "gradient_pct": 16.773683215486585,
   "start_distance_m": 23.0,
   "end_distance_m": 73.0,
   "midpoint_distance_m": 48.0,
   "start_elevation_m": 272.8509422718331,
   "end_elevation_m": 281.2377838795764,
   "start_xy": [
    697137.9627353502,
    4758536.559652936
   ],
   "end_xy": [
    697087.9893008632,
    4758537.798617088
   ]
  },
  "max_100m": {
   "gradient_pct": 14.36919021716443,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 268.373333715443,
   "end_elevation_m": 282.7425239326074,
   "start_xy": [
    697160.936,
    4758535.451
   ],
   "end_xy": [
    697061.0010185896,
    4758537.175399894
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.408627788763397,
   "start_distance_m": 77.0,
   "end_distance_m": 82.0,
   "midpoint_distance_m": 79.5,
   "start_elevation_m": 281.4377940059426,
   "end_elevation_m": 281.1173626165044,
   "start_xy": [
    697083.989433063,
    4758537.766096631
   ],
   "end_xy": [
    697078.9895983125,
    4758537.725446058
   ]
  },
  "min_10m": {
   "gradient_pct": -2.734998211686843,
   "start_distance_m": 111.0,
   "end_distance_m": 121.0,
   "midpoint_distance_m": 116.0,
   "start_elevation_m": 284.1223388895826,
   "end_elevation_m": 283.8488390684139,
   "start_xy": [
    697050.0123966013,
    4758536.67521313
   ],
   "end_xy": [
    697040.0227402482,
    4758536.220497891
   ]
  },
  "min_20m": {
   "gradient_pct": 3.4180957136337042,
   "start_distance_m": 105.0,
   "end_distance_m": 125.0,
   "midpoint_distance_m": 115.0,
   "start_elevation_m": 283.51900694743705,
   "end_elevation_m": 284.2026260901638,
   "start_xy": [
    697056.006190413,
    4758536.9480422735
   ],
   "end_xy": [
    697036.026877707,
    4758536.038611796
   ]
  },
  "min_25m": {
   "gradient_pct": 5.140863395364477,
   "start_distance_m": 73.0,
   "end_distance_m": 98.0,
   "midpoint_distance_m": 85.5,
   "start_elevation_m": 281.2377838795764,
   "end_elevation_m": 282.5229997284175,
   "start_xy": [
    697087.9893008632,
    4758537.798617088
   ],
   "end_xy": [
    697062.9989498601,
    4758537.266342942
   ]
  },
  "min_50m": {
   "gradient_pct": 5.5046848667781205,
   "start_distance_m": 73.0,
   "end_distance_m": 123.0,
   "midpoint_distance_m": 98.0,
   "start_elevation_m": 281.2377838795764,
   "end_elevation_m": 283.99012631296546,
   "start_xy": [
    697087.9893008632,
    4758537.798617088
   ],
   "end_xy": [
    697038.0248089776,
    4758536.1295548435
   ]
  },
  "min_100m": {
   "gradient_pct": 9.529351100658232,
   "start_distance_m": 150.0,
   "end_distance_m": 250.0,
   "midpoint_distance_m": 200.0,
   "start_elevation_m": 289.78454465414677,
   "end_elevation_m": 299.313895754805,
   "start_xy": [
    697011.0537672144,
    4758534.882701326
   ],
   "end_xy": [
    696922.9997233268,
    4758499.69261918
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 48.82793900473246,
   "start_distance_m": 1.0,
   "end_distance_m": 3.0,
   "midpoint_distance_m": 2.0,
   "start_elevation_m": 268.74685969035744,
   "end_elevation_m": 269.7234184704521,
   "start_xy": [
    697159.9371624065,
    4758535.499202302
   ],
   "end_xy": [
    697157.9394872196,
    4758535.595606905
   ]
  },
  "max_3m": {
   "gradient_pct": 45.00282516697022,
   "start_distance_m": 0.0,
   "end_distance_m": 3.0,
   "midpoint_distance_m": 1.5,
   "start_elevation_m": 268.373333715443,
   "end_elevation_m": 269.7234184704521,
   "start_xy": [
    697160.936,
    4758535.451
   ],
   "end_xy": [
    697157.9394872196,
    4758535.595606905
   ]
  }
 },
 "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",
   "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_x69y476_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-25T00:05:23+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-2-260824",
  "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": [
   "x69y476"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 12.7% over 200 m (Terrain 50), gain 45.1 m over 363 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 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": "Dummerston",
  "county": "Vermont"
 }
}