{
 "ocl_version": "0.1.0",
 "name": "Tucker Road",
 "slug": "tucker-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.1600397483669,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 820.0,
   "end_distance_m": 822.0,
   "start_elevation_m": 341.55295802794626,
   "end_elevation_m": 342.2161588229136,
   "min_gradient_pct": -17.1428802754491
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.95004153535774,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 819.0,
   "end_distance_m": 822.0,
   "start_elevation_m": 341.31765757685287,
   "end_elevation_m": 342.2161588229136,
   "min_gradient_pct": -14.035376464255478
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.71865021921508,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 817.0,
   "end_distance_m": 822.0,
   "start_elevation_m": 340.78022631195284,
   "end_elevation_m": 342.2161588229136,
   "min_gradient_pct": -13.872677915358054
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.92107934117564,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 820.0,
   "end_distance_m": 830.0,
   "start_elevation_m": 341.55295802794626,
   "end_elevation_m": 344.1450659620638,
   "min_gradient_pct": -11.555760437199183
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.849412673221423,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 812.0,
   "end_distance_m": 832.0,
   "start_elevation_m": 339.709608473455,
   "end_elevation_m": 344.67949100809926,
   "min_gradient_pct": -8.60790604211985
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.812966527385242,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 807.0,
   "end_distance_m": 832.0,
   "start_elevation_m": 338.72624937625295,
   "end_elevation_m": 344.67949100809926,
   "min_gradient_pct": -7.966055887406583
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.73769287761695,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 789.0,
   "end_distance_m": 839.0,
   "start_elevation_m": 335.8182291522418,
   "end_elevation_m": 345.6870755910503,
   "min_gradient_pct": -3.636555627863004
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.407772063436596,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 739.0,
   "end_distance_m": 839.0,
   "start_elevation_m": 330.2793035276137,
   "end_elevation_m": 345.6870755910503,
   "min_gradient_pct": 0.08290196448490406
  }
 ],
 "shape": {
  "ascent_concentration": 0.344,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 86.0,
  "shape_class": "sustained"
 },
 "length_m": 1271.8819898767892,
 "start_elevation_m": 278.35063625944724,
 "end_elevation_m": 374.03152967741494,
 "endpoint_gain_m": 95.6808934179677,
 "overall_gradient_pct": 7.522780743772979,
 "accumulated_ascent_m": 101.67699188942765,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.71865021921508,
   "start_distance_m": 817.0,
   "end_distance_m": 822.0,
   "midpoint_distance_m": 819.5,
   "start_elevation_m": 340.78022631195284,
   "end_elevation_m": 342.2161588229136,
   "start_xy": [
    290545.9586399738,
    4922184.929388229
   ],
   "end_xy": [
    290550.44351392187,
    4922187.139796713
   ]
  },
  "max_10m": {
   "gradient_pct": 25.92107934117564,
   "start_distance_m": 820.0,
   "end_distance_m": 830.0,
   "midpoint_distance_m": 825.0,
   "start_elevation_m": 341.55295802794626,
   "end_elevation_m": 344.1450659620638,
   "start_xy": [
    290548.64956434263,
    4922186.25563332
   ],
   "end_xy": [
    290557.61931223876,
    4922190.67645029
   ]
  },
  "max_20m": {
   "gradient_pct": 24.849412673221423,
   "start_distance_m": 812.0,
   "end_distance_m": 832.0,
   "midpoint_distance_m": 822.0,
   "start_elevation_m": 339.709608473455,
   "end_elevation_m": 344.67949100809926,
   "start_xy": [
    290541.5834215091,
    4922182.549339468
   ],
   "end_xy": [
    290559.413261818,
    4922191.560613683
   ]
  },
  "max_25m": {
   "gradient_pct": 23.812966527385242,
   "start_distance_m": 807.0,
   "end_distance_m": 832.0,
   "midpoint_distance_m": 819.5,
   "start_elevation_m": 338.72624937625295,
   "end_elevation_m": 344.67949100809926,
   "start_xy": [
    290537.7264357347,
    4922179.367569404
   ],
   "end_xy": [
    290559.413261818,
    4922191.560613683
   ]
  },
  "max_50m": {
   "gradient_pct": 19.73769287761695,
   "start_distance_m": 789.0,
   "end_distance_m": 839.0,
   "midpoint_distance_m": 814.0,
   "start_elevation_m": 335.8182291522418,
   "end_elevation_m": 345.6870755910503,
   "start_xy": [
    290523.84128694696,
    4922167.913197176
   ],
   "end_xy": [
    290565.5461425201,
    4922194.849086661
   ]
  },
  "max_100m": {
   "gradient_pct": 15.407772063436596,
   "start_distance_m": 739.0,
   "end_distance_m": 839.0,
   "midpoint_distance_m": 789.0,
   "start_elevation_m": 330.2793035276137,
   "end_elevation_m": 345.6870755910503,
   "start_xy": [
    290481.3545393972,
    4922141.591147029
   ],
   "end_xy": [
    290565.5461425201,
    4922194.849086661
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -13.872677915358054,
   "start_distance_m": 1134.0,
   "end_distance_m": 1139.0,
   "midpoint_distance_m": 1136.5,
   "start_elevation_m": 363.594324958893,
   "end_elevation_m": 362.9006910631251,
   "start_xy": [
    290714.6311489446,
    4922333.759103398
   ],
   "end_xy": [
    290710.5675331293,
    4922330.8458532365
   ]
  },
  "min_10m": {
   "gradient_pct": -11.555760437199183,
   "start_distance_m": 1129.0,
   "end_distance_m": 1139.0,
   "midpoint_distance_m": 1134.0,
   "start_elevation_m": 364.05626710684504,
   "end_elevation_m": 362.9006910631251,
   "start_xy": [
    290718.6947647599,
    4922336.67235356
   ],
   "end_xy": [
    290710.5675331293,
    4922330.8458532365
   ]
  },
  "min_20m": {
   "gradient_pct": -8.60790604211985,
   "start_distance_m": 1119.0,
   "end_distance_m": 1139.0,
   "midpoint_distance_m": 1129.0,
   "start_elevation_m": 364.6222722715491,
   "end_elevation_m": 362.9006910631251,
   "start_xy": [
    290726.8219963905,
    4922342.498853884
   ],
   "end_xy": [
    290710.5675331293,
    4922330.8458532365
   ]
  },
  "min_25m": {
   "gradient_pct": -7.966055887406583,
   "start_distance_m": 1114.0,
   "end_distance_m": 1139.0,
   "midpoint_distance_m": 1126.5,
   "start_elevation_m": 364.89220503497677,
   "end_elevation_m": 362.9006910631251,
   "start_xy": [
    290730.9542039455,
    4922345.263385403
   ],
   "end_xy": [
    290710.5675331293,
    4922330.8458532365
   ]
  },
  "min_50m": {
   "gradient_pct": -3.636555627863004,
   "start_distance_m": 1102.0,
   "end_distance_m": 1152.0,
   "midpoint_distance_m": 1127.0,
   "start_elevation_m": 364.7143796069224,
   "end_elevation_m": 362.8961017929909,
   "start_xy": [
    290742.22244984563,
    4922341.482110785
   ],
   "end_xy": [
    290699.8677946918,
    4922323.90213443
   ]
  },
  "min_100m": {
   "gradient_pct": 0.08290196448490406,
   "start_distance_m": 547.0,
   "end_distance_m": 647.0,
   "midpoint_distance_m": 597.0,
   "start_elevation_m": 321.4574211663795,
   "end_elevation_m": 321.5403231308644,
   "start_xy": [
    290321.2012367189,
    4922036.933881294
   ],
   "end_xy": [
    290401.57078059926,
    4922095.87781516
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.1600397483669,
   "start_distance_m": 820.0,
   "end_distance_m": 822.0,
   "midpoint_distance_m": 821.0,
   "start_elevation_m": 341.55295802794626,
   "end_elevation_m": 342.2161588229136,
   "start_xy": [
    290548.64956434263,
    4922186.25563332
   ],
   "end_xy": [
    290550.44351392187,
    4922187.139796713
   ]
  },
  "max_3m": {
   "gradient_pct": 29.95004153535774,
   "start_distance_m": 819.0,
   "end_distance_m": 822.0,
   "midpoint_distance_m": 820.5,
   "start_elevation_m": 341.31765757685287,
   "end_elevation_m": 342.2161588229136,
   "start_xy": [
    290547.752589553,
    4922185.813551622
   ],
   "end_xy": [
    290550.44351392187,
    4922187.139796713
   ]
  }
 },
 "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": 0.428,
   "obstruction_max_height_m": 28.94,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/nh/USGS_one_meter_x28y493_NH_CT_RiverNorthL6_2015.tif",
   "data/cache/usa/nh/USGS_one_meter_x29y493_NH_CT_RiverNorthL6_2015.tif"
  ],
  "calculated_at": "2026-09-04T18:57:12+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/new-hampshire-260822.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "us-hs-bench-260904",
  "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, NH_CT_RiverNorthL6_2015 (collected 2015)",
  "elevation_tile_ids": [
   "x28y493",
   "x29y493"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/USGS_LPC_CT_River_Lot6_Winnipesaulee_2015_LAS_2017",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.99,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Dalton",
  "county": "New Hampshire"
 }
}