{
 "ocl_version": "0.1.0",
 "name": "Lynds Hill Road",
 "slug": "lynds-hill-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 31.388763685325216,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 230.0,
   "end_distance_m": 232.0,
   "start_elevation_m": 442.0183833233599,
   "end_elevation_m": 442.6461585970664,
   "min_gradient_pct": -38.028526447155286
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.103354549655176,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 230.0,
   "end_distance_m": 233.0,
   "start_elevation_m": 442.0183833233599,
   "end_elevation_m": 442.95148395984955,
   "min_gradient_pct": -31.320677911403056
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.079316911833757,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 253.0,
   "end_distance_m": 258.0,
   "start_elevation_m": 446.67260644756595,
   "end_elevation_m": 448.02657229315764,
   "min_gradient_pct": -24.067887225452296
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.36561168923754,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 250.0,
   "end_distance_m": 260.0,
   "start_elevation_m": 445.8999829578738,
   "end_elevation_m": 448.43654412679757,
   "min_gradient_pct": -20.777946390664965
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.259665018749217,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 242.0,
   "end_distance_m": 262.0,
   "start_elevation_m": 444.3656690769476,
   "end_elevation_m": 448.81760208069744,
   "min_gradient_pct": -19.699311148877428
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.305427616177212,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 237.0,
   "end_distance_m": 262.0,
   "start_elevation_m": 443.49124517665314,
   "end_elevation_m": 448.81760208069744,
   "min_gradient_pct": -18.245005521810754
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.658063094033196,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 220.0,
   "end_distance_m": 270.0,
   "start_elevation_m": 440.1086534192257,
   "end_elevation_m": 449.9376849662423,
   "min_gradient_pct": -15.96747081523722
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.276933675625344,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 174.0,
   "end_distance_m": 274.0,
   "start_elevation_m": 434.2413997455988,
   "end_elevation_m": 450.51833342122416,
   "min_gradient_pct": -15.075419016318278
  }
 ],
 "shape": {
  "ascent_concentration": 0.572,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 228.0,
  "shape_class": "stepped"
 },
 "length_m": 3942.9074244883586,
 "start_elevation_m": 409.41084892577624,
 "end_elevation_m": 460.6250495765043,
 "endpoint_gain_m": 51.21420065072806,
 "overall_gradient_pct": 1.2988943218055327,
 "accumulated_ascent_m": 209.15111929394675,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.079316911833757,
   "start_distance_m": 253.0,
   "end_distance_m": 258.0,
   "midpoint_distance_m": 255.5,
   "start_elevation_m": 446.67260644756595,
   "end_elevation_m": 448.02657229315764,
   "start_xy": [
    687481.9666456621,
    4821748.730912909
   ],
   "end_xy": [
    687477.0683759382,
    4821747.7274420755
   ]
  },
  "max_10m": {
   "gradient_pct": 25.36561168923754,
   "start_distance_m": 250.0,
   "end_distance_m": 260.0,
   "midpoint_distance_m": 255.0,
   "start_elevation_m": 445.8999829578738,
   "end_elevation_m": 448.43654412679757,
   "start_xy": [
    687484.9056074964,
    4821749.332995408
   ],
   "end_xy": [
    687475.1090680487,
    4821747.326053742
   ]
  },
  "max_20m": {
   "gradient_pct": 22.259665018749217,
   "start_distance_m": 242.0,
   "end_distance_m": 262.0,
   "midpoint_distance_m": 252.0,
   "start_elevation_m": 444.3656690769476,
   "end_elevation_m": 448.81760208069744,
   "start_xy": [
    687492.2058295204,
    4821752.575496372
   ],
   "end_xy": [
    687473.1497601591,
    4821746.924665409
   ]
  },
  "max_25m": {
   "gradient_pct": 21.305427616177212,
   "start_distance_m": 237.0,
   "end_distance_m": 262.0,
   "midpoint_distance_m": 249.5,
   "start_elevation_m": 443.49124517665314,
   "end_elevation_m": 448.81760208069744,
   "start_xy": [
    687496.7466491732,
    4821754.668569921
   ],
   "end_xy": [
    687473.1497601591,
    4821746.924665409
   ]
  },
  "max_50m": {
   "gradient_pct": 19.658063094033196,
   "start_distance_m": 220.0,
   "end_distance_m": 270.0,
   "midpoint_distance_m": 245.0,
   "start_elevation_m": 440.1086534192257,
   "end_elevation_m": 449.9376849662423,
   "start_xy": [
    687511.6788989924,
    4821762.669081116
   ],
   "end_xy": [
    687465.3125286009,
    4821745.319112077
   ]
  },
  "max_100m": {
   "gradient_pct": 16.276933675625344,
   "start_distance_m": 174.0,
   "end_distance_m": 274.0,
   "midpoint_distance_m": 224.0,
   "start_elevation_m": 434.2413997455988,
   "end_elevation_m": 450.51833342122416,
   "start_xy": [
    687545.2795410445,
    4821793.575803164
   ],
   "end_xy": [
    687461.4057114446,
    4821744.467087236
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -24.067887225452296,
   "start_distance_m": 3824.0,
   "end_distance_m": 3829.0,
   "midpoint_distance_m": 3826.5,
   "start_elevation_m": 478.2438434902838,
   "end_elevation_m": 477.04044912901117,
   "start_xy": [
    684627.7350402775,
    4821856.377696922
   ],
   "end_xy": [
    684623.1896777326,
    4821858.460886625
   ]
  },
  "min_10m": {
   "gradient_pct": -20.777946390664965,
   "start_distance_m": 3878.0,
   "end_distance_m": 3888.0,
   "midpoint_distance_m": 3883.0,
   "start_elevation_m": 470.56380861748255,
   "end_elevation_m": 468.48601397841605,
   "start_xy": [
    684577.5879549971,
    4821876.041354041
   ],
   "end_xy": [
    684567.9889796869,
    4821878.844864874
   ]
  },
  "min_20m": {
   "gradient_pct": -19.699311148877428,
   "start_distance_m": 3811.0,
   "end_distance_m": 3831.0,
   "midpoint_distance_m": 3821.0,
   "start_elevation_m": 480.6498708232357,
   "end_elevation_m": 476.7100085934602,
   "start_xy": [
    684639.7532712236,
    4821851.444002673
   ],
   "end_xy": [
    684621.3715327148,
    4821859.294162505
   ]
  },
  "min_25m": {
   "gradient_pct": -18.245005521810754,
   "start_distance_m": 3811.0,
   "end_distance_m": 3836.0,
   "midpoint_distance_m": 3823.5,
   "start_elevation_m": 480.6498708232357,
   "end_elevation_m": 476.088619442783,
   "start_xy": [
    684639.7532712236,
    4821851.444002673
   ],
   "end_xy": [
    684616.8261701701,
    4821861.377352208
   ]
  },
  "min_50m": {
   "gradient_pct": -15.96747081523722,
   "start_distance_m": 3246.0,
   "end_distance_m": 3296.0,
   "midpoint_distance_m": 3271.0,
   "start_elevation_m": 539.8541663089048,
   "end_elevation_m": 531.8704309012862,
   "start_xy": [
    684796.402338075,
    4821383.434950071
   ],
   "end_xy": [
    684797.7628468245,
    4821433.349890637
   ]
  },
  "min_100m": {
   "gradient_pct": -15.075419016318278,
   "start_distance_m": 3225.0,
   "end_distance_m": 3325.0,
   "midpoint_distance_m": 3275.0,
   "start_elevation_m": 542.7992674485056,
   "end_elevation_m": 527.7238484321873,
   "start_xy": [
    684798.7751570258,
    4821362.610019001
   ],
   "end_xy": [
    684801.1751284458,
    4821462.144126142
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 31.388763685325216,
   "start_distance_m": 230.0,
   "end_distance_m": 232.0,
   "midpoint_distance_m": 231.0,
   "start_elevation_m": 442.0183833233599,
   "end_elevation_m": 442.6461585970664,
   "start_xy": [
    687503.1037966872,
    4821757.598872889
   ],
   "end_xy": [
    687501.287468826,
    4821756.761643469
   ]
  },
  "max_3m": {
   "gradient_pct": 31.103354549655176,
   "start_distance_m": 230.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 231.5,
   "start_elevation_m": 442.0183833233599,
   "end_elevation_m": 442.95148395984955,
   "start_xy": [
    687503.1037966872,
    4821757.598872889
   ],
   "end_xy": [
    687500.3793048955,
    4821756.34302876
   ]
  }
 },
 "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",
   "descends_at_end"
  ],
  "suggested_summit_cut_m": 2284.0,
  "trailing_descent_m": 154.1
 },
 "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_x68y483_VT_Statewide_A23.tif"
  ],
  "calculated_at": "2026-08-24T23:18:55+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": [
   "x68y483"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.0% over 200 m (Terrain 50), gain 52.2 m over 3943 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 corridor points fetched; VT_Statewide_1_A23: no EPT nodes intersect the corridor",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Plymouth",
  "county": "Vermont"
 }
}