{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (43.9567, -72.1384)",
 "slug": "discovered-lane-43-9567-72-1384",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.87388869179614,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 312.0,
   "end_distance_m": 314.0,
   "start_elevation_m": 252.91621995779397,
   "end_elevation_m": 253.3536977316299,
   "min_gradient_pct": 0.7408426187623718
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.790601904592677,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 312.0,
   "end_distance_m": 315.0,
   "start_elevation_m": 252.91621995779397,
   "end_elevation_m": 253.56993801493175,
   "min_gradient_pct": 0.8942029595772283
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.58118606216135,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 312.0,
   "end_distance_m": 317.0,
   "start_elevation_m": 252.91621995779397,
   "end_elevation_m": 253.99527926090204,
   "min_gradient_pct": 1.4174171364328458
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.38643409549843,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 313.0,
   "end_distance_m": 323.0,
   "start_elevation_m": 253.13264211270274,
   "end_elevation_m": 255.27128552225258,
   "min_gradient_pct": 1.832249134031656
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.552392014246408,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 306.0,
   "end_distance_m": 326.0,
   "start_elevation_m": 251.76821930143575,
   "end_elevation_m": 255.87869770428503,
   "min_gradient_pct": 2.4291573363895225
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.068404918695137,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 305.0,
   "end_distance_m": 330.0,
   "start_elevation_m": 251.58388209612733,
   "end_elevation_m": 256.6009833258011,
   "min_gradient_pct": 2.5467678578839923
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.752840193796033,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 306.0,
   "end_distance_m": 356.0,
   "start_elevation_m": 251.76821930143575,
   "end_elevation_m": 261.14463939833377,
   "min_gradient_pct": 4.3316088695885355
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.65470732765479,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 260.0,
   "end_distance_m": 360.0,
   "start_elevation_m": 244.20455964922192,
   "end_elevation_m": 261.8592669768767,
   "min_gradient_pct": 7.226462707331194
  }
 ],
 "shape": {
  "ascent_concentration": 0.319,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 141.0,
  "shape_class": "sustained"
 },
 "length_m": 485.9943154947106,
 "start_elevation_m": 214.20983999784423,
 "end_elevation_m": 278.8553319513653,
 "endpoint_gain_m": 64.64549195352109,
 "overall_gradient_pct": 13.301697137695157,
 "accumulated_ascent_m": 64.64549195352109,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.58118606216135,
   "start_distance_m": 312.0,
   "end_distance_m": 317.0,
   "midpoint_distance_m": 314.5,
   "start_elevation_m": 252.91621995779397,
   "end_elevation_m": 253.99527926090204,
   "start_xy": [
    729594.6288722135,
    4871132.511397322
   ],
   "end_xy": [
    729595.0547278476,
    4871137.49322901
   ]
  },
  "max_10m": {
   "gradient_pct": 21.38643409549843,
   "start_distance_m": 313.0,
   "end_distance_m": 323.0,
   "midpoint_distance_m": 318.0,
   "start_elevation_m": 253.13264211270274,
   "end_elevation_m": 255.27128552225258,
   "start_xy": [
    729594.7140433404,
    4871133.50776366
   ],
   "end_xy": [
    729594.7516358922,
    4871143.484658479
   ]
  },
  "max_20m": {
   "gradient_pct": 20.552392014246408,
   "start_distance_m": 306.0,
   "end_distance_m": 326.0,
   "midpoint_distance_m": 316.0,
   "start_elevation_m": 251.76821930143575,
   "end_elevation_m": 255.87869770428503,
   "start_xy": [
    729594.1178454527,
    4871126.5331992945
   ],
   "end_xy": [
    729594.593392299,
    4871146.480482066
   ]
  },
  "max_25m": {
   "gradient_pct": 20.068404918695137,
   "start_distance_m": 305.0,
   "end_distance_m": 330.0,
   "midpoint_distance_m": 317.5,
   "start_elevation_m": 251.58388209612733,
   "end_elevation_m": 256.6009833258011,
   "start_xy": [
    729594.032674326,
    4871125.536832957
   ],
   "end_xy": [
    729594.3824008413,
    4871150.474913516
   ]
  },
  "max_50m": {
   "gradient_pct": 18.752840193796033,
   "start_distance_m": 306.0,
   "end_distance_m": 356.0,
   "midpoint_distance_m": 331.0,
   "start_elevation_m": 251.76821930143575,
   "end_elevation_m": 261.14463939833377,
   "start_xy": [
    729594.1178454527,
    4871126.5331992945
   ],
   "end_xy": [
    729593.0467295201,
    4871176.440555071
   ]
  },
  "max_100m": {
   "gradient_pct": 17.65470732765479,
   "start_distance_m": 260.0,
   "end_distance_m": 360.0,
   "midpoint_distance_m": 310.0,
   "start_elevation_m": 244.20455964922192,
   "end_elevation_m": 261.8592669768767,
   "start_xy": [
    729598.5349398575,
    4871081.139310591
   ],
   "end_xy": [
    729592.8474212203,
    4871180.435586511
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.4174171364328458,
   "start_distance_m": 182.0,
   "end_distance_m": 187.0,
   "midpoint_distance_m": 184.5,
   "start_elevation_m": 238.4244359083216,
   "end_elevation_m": 238.49530676514325,
   "start_xy": [
    729612.6747715649,
    4871006.723908113
   ],
   "end_xy": [
    729609.9506624809,
    4871010.916667312
   ]
  },
  "min_10m": {
   "gradient_pct": 1.832249134031656,
   "start_distance_m": 182.0,
   "end_distance_m": 192.0,
   "midpoint_distance_m": 187.0,
   "start_elevation_m": 238.4244359083216,
   "end_elevation_m": 238.60766082172478,
   "start_xy": [
    729612.6747715649,
    4871006.723908113
   ],
   "end_xy": [
    729607.2172957517,
    4871015.103394071
   ]
  },
  "min_20m": {
   "gradient_pct": 2.4291573363895225,
   "start_distance_m": 182.0,
   "end_distance_m": 202.0,
   "midpoint_distance_m": 192.0,
   "start_elevation_m": 238.4244359083216,
   "end_elevation_m": 238.91026737559952,
   "start_xy": [
    729612.6747715649,
    4871006.723908113
   ],
   "end_xy": [
    729602.2311550652,
    4871023.719062217
   ]
  },
  "min_25m": {
   "gradient_pct": 2.5467678578839923,
   "start_distance_m": 180.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 192.5,
   "start_elevation_m": 238.36362372025488,
   "end_elevation_m": 239.00031568472588,
   "start_xy": [
    729613.7644151985,
    4871005.046804434
   ],
   "end_xy": [
    729601.1836189146,
    4871026.530230659
   ]
  },
  "min_50m": {
   "gradient_pct": 4.3316088695885355,
   "start_distance_m": 172.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 197.0,
   "start_elevation_m": 237.9493545565361,
   "end_elevation_m": 240.11515899133036,
   "start_xy": [
    729618.9739358886,
    4870999.023390848
   ],
   "end_xy": [
    729598.0737427587,
    4871043.16169415
   ]
  },
  "min_100m": {
   "gradient_pct": 7.226462707331194,
   "start_distance_m": 154.0,
   "end_distance_m": 254.0,
   "midpoint_distance_m": 204.0,
   "start_elevation_m": 236.04281215641768,
   "end_elevation_m": 243.26927486374888,
   "start_xy": [
    729634.874191757,
    4870990.868011821
   ],
   "end_xy": [
    729598.8491281422,
    4871075.15229867
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.87388869179614,
   "start_distance_m": 312.0,
   "end_distance_m": 314.0,
   "midpoint_distance_m": 313.0,
   "start_elevation_m": 252.91621995779397,
   "end_elevation_m": 253.3536977316299,
   "start_xy": [
    729594.6288722135,
    4871132.511397322
   ],
   "end_xy": [
    729594.7992144672,
    4871134.504129997
   ]
  },
  "max_3m": {
   "gradient_pct": 21.790601904592677,
   "start_distance_m": 312.0,
   "end_distance_m": 315.0,
   "midpoint_distance_m": 313.5,
   "start_elevation_m": 252.91621995779397,
   "end_elevation_m": 253.56993801493175,
   "start_xy": [
    729594.6288722135,
    4871132.511397322
   ],
   "end_xy": [
    729594.8843855939,
    4871135.500496334
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.045,
   "obstruction_max_height_m": 25.22,
   "flagged_windows_m": []
  },
  "review": [],
  "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_x72y488_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T21:49:21+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": [
   "x72y488"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 16.1% over 200 m (Terrain 50), gain 64.7 m over 486 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_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/VT_Statewide_2_A23",
   "ept_crs": "EPSG:3857",
   "station_coverage": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Fairlee",
  "county": "Vermont"
 }
}