{
 "ocl_version": "0.1.0",
 "name": "Youlin Road",
 "slug": "youlin-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 56.55347084581308,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 2.0,
   "start_elevation_m": 260.90645816540973,
   "end_elevation_m": 262.037527582326,
   "min_gradient_pct": -2.9506126304966074
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 45.73855646555861,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 3.0,
   "start_elevation_m": 260.90645816540973,
   "end_elevation_m": 262.2786148593765,
   "min_gradient_pct": -2.869644702241203
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.642818257817453,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "start_elevation_m": 260.90645816540973,
   "end_elevation_m": 262.3385990783006,
   "min_gradient_pct": -2.7070064165025087
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.12469623056029,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 953.0,
   "end_distance_m": 963.0,
   "start_elevation_m": 361.3661354382798,
   "end_elevation_m": 363.4786050613358,
   "min_gradient_pct": -1.4625226568398375
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.506118677981817,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 944.0,
   "end_distance_m": 964.0,
   "start_elevation_m": 359.5778192773773,
   "end_elevation_m": 363.67904301297364,
   "min_gradient_pct": -0.9293218237931455
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.164567548605646,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 942.0,
   "end_distance_m": 967.0,
   "start_elevation_m": 359.20471651636984,
   "end_elevation_m": 364.24585840352125,
   "min_gradient_pct": -0.716848102166523
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.53228677745392,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 922.0,
   "end_distance_m": 972.0,
   "start_elevation_m": 355.8383740692513,
   "end_elevation_m": 365.10451745797826,
   "min_gradient_pct": -0.19392696385273211
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.53748789819275,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 891.0,
   "end_distance_m": 991.0,
   "start_elevation_m": 351.37154844421485,
   "end_elevation_m": 367.9090363424076,
   "min_gradient_pct": 1.1773299801927806
  }
 ],
 "shape": {
  "ascent_concentration": 0.348,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 269.0,
  "shape_class": "sustained"
 },
 "length_m": 1009.5127965093919,
 "start_elevation_m": 260.90645816540973,
 "end_elevation_m": 369.12243461255497,
 "endpoint_gain_m": 108.21597644714524,
 "overall_gradient_pct": 10.71962404254065,
 "accumulated_ascent_m": 108.52730354653147,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.642818257817453,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 260.90645816540973,
   "end_elevation_m": 262.3385990783006,
   "start_xy": [
    644517.214,
    4791429.649
   ],
   "end_xy": [
    644520.8631510084,
    4791426.230858713
   ]
  },
  "max_10m": {
   "gradient_pct": 21.12469623056029,
   "start_distance_m": 953.0,
   "end_distance_m": 963.0,
   "midpoint_distance_m": 958.0,
   "start_elevation_m": 361.3661354382798,
   "end_elevation_m": 363.4786050613358,
   "start_xy": [
    645210.3584145759,
    4790983.234350788
   ],
   "end_xy": [
    645210.4177381619,
    4790973.236364882
   ]
  },
  "max_20m": {
   "gradient_pct": 20.506118677981817,
   "start_distance_m": 944.0,
   "end_distance_m": 964.0,
   "midpoint_distance_m": 954.0,
   "start_elevation_m": 359.5778192773773,
   "end_elevation_m": 363.67904301297364,
   "start_xy": [
    645210.6604122883,
    4790992.229281464
   ],
   "end_xy": [
    645210.433844591,
    4790972.236494647
   ]
  },
  "max_25m": {
   "gradient_pct": 20.164567548605646,
   "start_distance_m": 942.0,
   "end_distance_m": 967.0,
   "midpoint_distance_m": 954.5,
   "start_elevation_m": 359.20471651636984,
   "end_elevation_m": 364.24585840352125,
   "start_xy": [
    645210.7282983841,
    4790994.228128947
   ],
   "end_xy": [
    645210.4827457034,
    4790969.236893536
   ]
  },
  "max_50m": {
   "gradient_pct": 18.53228677745392,
   "start_distance_m": 922.0,
   "end_distance_m": 972.0,
   "midpoint_distance_m": 947.0,
   "start_elevation_m": 355.8383740692513,
   "end_elevation_m": 365.10451745797826,
   "start_xy": [
    645211.3993197858,
    4791014.216866647
   ],
   "end_xy": [
    645210.8333556278,
    4790964.261057241
   ]
  },
  "max_100m": {
   "gradient_pct": 16.53748789819275,
   "start_distance_m": 891.0,
   "end_distance_m": 991.0,
   "midpoint_distance_m": 941.0,
   "start_elevation_m": 351.37154844421485,
   "end_elevation_m": 367.9090363424076,
   "start_xy": [
    645211.3216316437,
    4791045.199501961
   ],
   "end_xy": [
    645218.1803776077,
    4790946.872244785
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.7070064165025087,
   "start_distance_m": 297.0,
   "end_distance_m": 302.0,
   "midpoint_distance_m": 299.5,
   "start_elevation_m": 291.33901394525105,
   "end_elevation_m": 291.20366362442593,
   "start_xy": [
    644770.5769231922,
    4791284.038644026
   ],
   "end_xy": [
    644775.5530485702,
    4791283.550617711
   ]
  },
  "min_10m": {
   "gradient_pct": -1.4625226568398375,
   "start_distance_m": 296.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 301.0,
   "start_elevation_m": 291.3463439993641,
   "end_elevation_m": 291.2000917336801,
   "start_xy": [
    644769.5817370788,
    4791284.136647002
   ],
   "end_xy": [
    644779.5338937202,
    4791283.159632947
   ]
  },
  "min_20m": {
   "gradient_pct": -0.9293218237931455,
   "start_distance_m": 296.0,
   "end_distance_m": 316.0,
   "midpoint_distance_m": 306.0,
   "start_elevation_m": 291.3463439993641,
   "end_elevation_m": 291.16047963460545,
   "start_xy": [
    644769.5817370788,
    4791284.136647002
   ],
   "end_xy": [
    644789.4859546301,
    4791282.181640965
   ]
  },
  "min_25m": {
   "gradient_pct": -0.716848102166523,
   "start_distance_m": 296.0,
   "end_distance_m": 321.0,
   "midpoint_distance_m": 308.5,
   "start_elevation_m": 291.3463439993641,
   "end_elevation_m": 291.16713197382245,
   "start_xy": [
    644769.5817370788,
    4791284.136647002
   ],
   "end_xy": [
    644794.4284133762,
    4791281.44760086
   ]
  },
  "min_50m": {
   "gradient_pct": -0.19392696385273211,
   "start_distance_m": 296.0,
   "end_distance_m": 346.0,
   "midpoint_distance_m": 321.0,
   "start_elevation_m": 291.3463439993641,
   "end_elevation_m": 291.2493805174377,
   "start_xy": [
    644769.5817370788,
    4791284.136647002
   ],
   "end_xy": [
    644818.672460426,
    4791275.532613993
   ]
  },
  "min_100m": {
   "gradient_pct": 1.1773299801927806,
   "start_distance_m": 289.0,
   "end_distance_m": 389.0,
   "midpoint_distance_m": 339.0,
   "start_elevation_m": 291.086411066303,
   "end_elevation_m": 292.2637410464958,
   "start_xy": [
    644762.6152410024,
    4791284.82069586
   ],
   "end_xy": [
    644855.2495153581,
    4791253.529586438
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 56.55347084581308,
   "start_distance_m": 0.0,
   "end_distance_m": 2.0,
   "midpoint_distance_m": 1.0,
   "start_elevation_m": 260.90645816540973,
   "end_elevation_m": 262.037527582326,
   "start_xy": [
    644517.214,
    4791429.649
   ],
   "end_xy": [
    644518.6739471448,
    4791428.282049452
   ]
  },
  "max_3m": {
   "gradient_pct": 45.73855646555861,
   "start_distance_m": 0.0,
   "end_distance_m": 3.0,
   "midpoint_distance_m": 1.5,
   "start_elevation_m": 260.90645816540973,
   "end_elevation_m": 262.2786148593765,
   "start_xy": [
    644517.214,
    4791429.649
   ],
   "end_xy": [
    644519.4036713976,
    4791427.598307896
   ]
  }
 },
 "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_x64y480_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-09-03T22:38:12+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": "canopy-tail-260903",
  "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": [
   "x64y480"
  ],
  "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": "Rupert",
  "county": "Vermont"
 }
}