{
 "ocl_version": "0.1.0",
 "name": "Austin Road",
 "slug": "austin-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.21279870096987,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 410.0,
   "end_distance_m": 412.0,
   "start_elevation_m": 408.4898461146828,
   "end_elevation_m": 409.1541020887022,
   "min_gradient_pct": -7.014777165341002
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.071134209954227,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 409.0,
   "end_distance_m": 412.0,
   "start_elevation_m": 408.22196806240356,
   "end_elevation_m": 409.1541020887022,
   "min_gradient_pct": -5.4490622965867415
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.247875203121566,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 18.0,
   "end_distance_m": 23.0,
   "start_elevation_m": 362.4752778774219,
   "end_elevation_m": 363.88767163757797,
   "min_gradient_pct": -5.201787431768707
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.647781350392734,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 16.0,
   "end_distance_m": 26.0,
   "start_elevation_m": 362.0917565631378,
   "end_elevation_m": 364.45653469817705,
   "min_gradient_pct": -1.162010458418763
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.330286497266457,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 392.0,
   "end_distance_m": 412.0,
   "start_elevation_m": 405.0880447892489,
   "end_elevation_m": 409.1541020887022,
   "min_gradient_pct": 0.29556755069847895
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 19.88413432441621,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 387.0,
   "end_distance_m": 412.0,
   "start_elevation_m": 404.18306850759814,
   "end_elevation_m": 409.1541020887022,
   "min_gradient_pct": 1.0067134646419618
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.68775131347536,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 376.0,
   "end_distance_m": 426.0,
   "start_elevation_m": 402.264297199898,
   "end_elevation_m": 411.1081728566357,
   "min_gradient_pct": 3.8578293242391055
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.838752749484286,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 313.0,
   "end_distance_m": 413.0,
   "start_elevation_m": 392.4937299305392,
   "end_elevation_m": 409.3324826800235,
   "min_gradient_pct": 5.885564507095751
  }
 ],
 "shape": {
  "ascent_concentration": 0.342,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 81.0,
  "shape_class": "sustained"
 },
 "length_m": 426.39567255267974,
 "start_elevation_m": 359.66967809222473,
 "end_elevation_m": 411.2078413620127,
 "endpoint_gain_m": 51.53816326978796,
 "overall_gradient_pct": 12.086933941249272,
 "accumulated_ascent_m": 52.011867216646465,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.247875203121566,
   "start_distance_m": 18.0,
   "end_distance_m": 23.0,
   "midpoint_distance_m": 20.5,
   "start_elevation_m": 362.4752778774219,
   "end_elevation_m": 363.88767163757797,
   "start_xy": [
    697078.5551791198,
    4836864.48189595
   ],
   "end_xy": [
    697075.8576532754,
    4836868.691807387
   ]
  },
  "max_10m": {
   "gradient_pct": 23.647781350392734,
   "start_distance_m": 16.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 21.0,
   "start_elevation_m": 362.0917565631378,
   "end_elevation_m": 364.45653469817705,
   "start_xy": [
    697079.7603998645,
    4836862.896519564
   ],
   "end_xy": [
    697074.2391377687,
    4836871.21775425
   ]
  },
  "max_20m": {
   "gradient_pct": 20.330286497266457,
   "start_distance_m": 392.0,
   "end_distance_m": 412.0,
   "midpoint_distance_m": 402.0,
   "start_elevation_m": 405.0880447892489,
   "end_elevation_m": 409.1541020887022,
   "start_xy": [
    696851.4786897885,
    4837145.002880248
   ],
   "end_xy": [
    696840.8710650048,
    4837157.284558692
   ]
  },
  "max_25m": {
   "gradient_pct": 19.88413432441621,
   "start_distance_m": 387.0,
   "end_distance_m": 412.0,
   "midpoint_distance_m": 399.5,
   "start_elevation_m": 404.18306850759814,
   "end_elevation_m": 409.1541020887022,
   "start_xy": [
    696851.5773800393,
    4837140.003854319
   ],
   "end_xy": [
    696840.8710650048,
    4837157.284558692
   ]
  },
  "max_50m": {
   "gradient_pct": 17.68775131347536,
   "start_distance_m": 376.0,
   "end_distance_m": 426.0,
   "midpoint_distance_m": 401.0,
   "start_elevation_m": 402.264297199898,
   "end_elevation_m": 411.1081728566357,
   "start_xy": [
    696851.7944985909,
    4837129.005997277
   ],
   "end_xy": [
    696826.8994595793,
    4837158.175761157
   ]
  },
  "max_100m": {
   "gradient_pct": 16.838752749484286,
   "start_distance_m": 313.0,
   "end_distance_m": 413.0,
   "midpoint_distance_m": 363.0,
   "start_elevation_m": 392.4937299305392,
   "end_elevation_m": 409.3324826800235,
   "start_xy": [
    696880.1104846688,
    4837075.189283707
   ],
   "end_xy": [
    696839.8730931887,
    4837157.348216011
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.201787431768707,
   "start_distance_m": 125.0,
   "end_distance_m": 130.0,
   "midpoint_distance_m": 127.5,
   "start_elevation_m": 371.5293701168392,
   "end_elevation_m": 371.26928074525074,
   "start_xy": [
    697009.8511075765,
    4836945.562872741
   ],
   "end_xy": [
    697005.2817387102,
    4836947.5928649
   ]
  },
  "min_10m": {
   "gradient_pct": -1.162010458418763,
   "start_distance_m": 124.0,
   "end_distance_m": 134.0,
   "midpoint_distance_m": 129.0,
   "start_elevation_m": 371.53629173177393,
   "end_elevation_m": 371.42009068593205,
   "start_xy": [
    697010.7649813497,
    4836945.156874309
   ],
   "end_xy": [
    697001.6262436172,
    4836949.216858626
   ]
  },
  "min_20m": {
   "gradient_pct": 0.29556755069847895,
   "start_distance_m": 46.0,
   "end_distance_m": 66.0,
   "midpoint_distance_m": 56.0,
   "start_elevation_m": 366.06913048966464,
   "end_elevation_m": 366.12824399980434,
   "start_xy": [
    697063.449034391,
    4836888.057400004
   ],
   "end_xy": [
    697051.4293026854,
    4836904.0222313255
   ]
  },
  "min_25m": {
   "gradient_pct": 1.0067134646419618,
   "start_distance_m": 41.0,
   "end_distance_m": 66.0,
   "midpoint_distance_m": 53.5,
   "start_elevation_m": 365.87656563364385,
   "end_elevation_m": 366.12824399980434,
   "start_xy": [
    697066.1465602354,
    4836883.847488565
   ],
   "end_xy": [
    697051.4293026854,
    4836904.0222313255
   ]
  },
  "min_50m": {
   "gradient_pct": 3.8578293242391055,
   "start_distance_m": 33.0,
   "end_distance_m": 83.0,
   "midpoint_distance_m": 58.0,
   "start_elevation_m": 365.3541207115595,
   "end_elevation_m": 367.28303537367907,
   "start_xy": [
    697070.4626015865,
    4836877.111630265
   ],
   "end_xy": [
    697040.0325772534,
    4836916.636296865
   ]
  },
  "min_100m": {
   "gradient_pct": 5.885564507095751,
   "start_distance_m": 37.0,
   "end_distance_m": 137.0,
   "midpoint_distance_m": 87.0,
   "start_elevation_m": 365.6808910133228,
   "end_elevation_m": 371.5664555204186,
   "start_xy": [
    697068.304580911,
    4836880.479559415
   ],
   "end_xy": [
    696998.8846222974,
    4836950.434853922
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.21279870096987,
   "start_distance_m": 410.0,
   "end_distance_m": 412.0,
   "midpoint_distance_m": 411.0,
   "start_elevation_m": 408.4898461146828,
   "end_elevation_m": 409.1541020887022,
   "start_xy": [
    696842.867008637,
    4837157.157244055
   ],
   "end_xy": [
    696840.8710650048,
    4837157.284558692
   ]
  },
  "max_3m": {
   "gradient_pct": 31.071134209954227,
   "start_distance_m": 409.0,
   "end_distance_m": 412.0,
   "midpoint_distance_m": 410.5,
   "start_elevation_m": 408.22196806240356,
   "end_elevation_m": 409.1541020887022,
   "start_xy": [
    696843.8649804532,
    4837157.093586735
   ],
   "end_xy": [
    696840.8710650048,
    4837157.284558692
   ]
  }
 },
 "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": [
   "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_x69y484_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-15T06:40:32+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": "reline-campaign-260915",
  "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": [
   "x69y484"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: VT_Statewide_2_A23: no corridor points fetched; VT_Statewide_1_A23: no EPT nodes intersect the corridor",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Pomfret",
  "county": "Vermont"
 }
}