{
 "ocl_version": "0.1.0",
 "name": "East Buckland Road",
 "slug": "east-buckland-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 18.419135111028595,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 5565.0,
   "end_distance_m": 5567.0,
   "start_elevation_m": 368.6565354762897,
   "end_elevation_m": 369.0249181785103,
   "min_gradient_pct": -9.506187335094296
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 18.595807546934868,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 5565.0,
   "end_distance_m": 5568.0,
   "start_elevation_m": 368.6565354762897,
   "end_elevation_m": 369.21440970269776,
   "min_gradient_pct": -9.315257187804113
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 17.241493064109363,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 5563.0,
   "end_distance_m": 5568.0,
   "start_elevation_m": 368.3523350494923,
   "end_elevation_m": 369.21440970269776,
   "min_gradient_pct": -8.898600462978266
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 16.883390690111924,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 5558.0,
   "end_distance_m": 5568.0,
   "start_elevation_m": 367.5260706336866,
   "end_elevation_m": 369.21440970269776,
   "min_gradient_pct": -8.81782449113814
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 16.20096020799224,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 5548.0,
   "end_distance_m": 5568.0,
   "start_elevation_m": 365.9742176610993,
   "end_elevation_m": 369.21440970269776,
   "min_gradient_pct": -8.747540970769307
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 15.85947409622554,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 5543.0,
   "end_distance_m": 5568.0,
   "start_elevation_m": 365.2495411786414,
   "end_elevation_m": 369.21440970269776,
   "min_gradient_pct": -8.548019593140452
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 14.46481855029674,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 5526.0,
   "end_distance_m": 5576.0,
   "start_elevation_m": 362.9612511862475,
   "end_elevation_m": 370.1936604613959,
   "min_gradient_pct": -7.840748538153775
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 11.966919175445128,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 5517.0,
   "end_distance_m": 5617.0,
   "start_elevation_m": 362.0696026781827,
   "end_elevation_m": 374.03652185362785,
   "min_gradient_pct": -6.2292789767712975
  }
 ],
 "shape": {
  "ascent_concentration": 0.346,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 67.0,
  "shape_class": "sustained"
 },
 "length_m": 5784.159115519484,
 "start_elevation_m": 162.54639073577837,
 "end_elevation_m": 381.4949944787842,
 "endpoint_gain_m": 218.9486037430058,
 "overall_gradient_pct": 3.7853143278085932,
 "accumulated_ascent_m": 244.04080642151817,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 17.241493064109363,
   "start_distance_m": 5563.0,
   "end_distance_m": 5568.0,
   "midpoint_distance_m": 5565.5,
   "start_elevation_m": 368.3523350494923,
   "end_elevation_m": 369.21440970269776,
   "start_xy": [
    682672.2868311001,
    4715432.998480889
   ],
   "end_xy": [
    682668.9327359839,
    4715429.290375708
   ]
  },
  "max_10m": {
   "gradient_pct": 16.883390690111924,
   "start_distance_m": 5558.0,
   "end_distance_m": 5568.0,
   "midpoint_distance_m": 5563.0,
   "start_elevation_m": 367.5260706336866,
   "end_elevation_m": 369.21440970269776,
   "start_xy": [
    682675.6263596145,
    4715436.719421147
   ],
   "end_xy": [
    682668.9327359839,
    4715429.290375708
   ]
  },
  "max_20m": {
   "gradient_pct": 16.20096020799224,
   "start_distance_m": 5548.0,
   "end_distance_m": 5568.0,
   "midpoint_distance_m": 5558.0,
   "start_elevation_m": 365.9742176610993,
   "end_elevation_m": 369.21440970269776,
   "start_xy": [
    682681.9775063689,
    4715444.443537674
   ],
   "end_xy": [
    682668.9327359839,
    4715429.290375708
   ]
  },
  "max_25m": {
   "gradient_pct": 15.85947409622554,
   "start_distance_m": 5543.0,
   "end_distance_m": 5568.0,
   "midpoint_distance_m": 5555.5,
   "start_elevation_m": 365.2495411786414,
   "end_elevation_m": 369.21440970269776,
   "start_xy": [
    682685.1516935165,
    4715448.306765493
   ],
   "end_xy": [
    682668.9327359839,
    4715429.290375708
   ]
  },
  "max_50m": {
   "gradient_pct": 14.46481855029674,
   "start_distance_m": 5526.0,
   "end_distance_m": 5576.0,
   "midpoint_distance_m": 5551.0,
   "start_elevation_m": 362.9612511862475,
   "end_elevation_m": 370.1936604613959,
   "start_xy": [
    682695.6660733618,
    4715461.660762865
   ],
   "end_xy": [
    682663.5658597877,
    4715423.3577006
   ]
  },
  "max_100m": {
   "gradient_pct": 11.966919175445128,
   "start_distance_m": 5517.0,
   "end_distance_m": 5617.0,
   "midpoint_distance_m": 5567.0,
   "start_elevation_m": 362.0696026781827,
   "end_elevation_m": 374.03652185362785,
   "start_xy": [
    682701.4729412916,
    4715468.536828401
   ],
   "end_xy": [
    682633.389890585,
    4715395.720851145
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.898600462978266,
   "start_distance_m": 4609.0,
   "end_distance_m": 4614.0,
   "midpoint_distance_m": 4611.5,
   "start_elevation_m": 315.5838313874309,
   "end_elevation_m": 315.138901364282,
   "start_xy": [
    682764.8685285194,
    4716294.589178762
   ],
   "end_xy": [
    682762.9424698217,
    4716289.9750380395
   ]
  },
  "min_10m": {
   "gradient_pct": -8.81782449113814,
   "start_distance_m": 4603.0,
   "end_distance_m": 4613.0,
   "midpoint_distance_m": 4608.0,
   "start_elevation_m": 316.1108242404644,
   "end_elevation_m": 315.2290417913506,
   "start_xy": [
    682767.2879009992,
    4716300.079436947
   ],
   "end_xy": [
    682763.32744018,
    4716290.897966977
   ]
  },
  "min_20m": {
   "gradient_pct": -8.747540970769307,
   "start_distance_m": 4603.0,
   "end_distance_m": 4623.0,
   "midpoint_distance_m": 4613.0,
   "start_elevation_m": 316.1108242404644,
   "end_elevation_m": 314.36131604631055,
   "start_xy": [
    682767.2879009992,
    4716300.079436947
   ],
   "end_xy": [
    682759.4756389662,
    4716281.669553576
   ]
  },
  "min_25m": {
   "gradient_pct": -8.548019593140452,
   "start_distance_m": 4601.0,
   "end_distance_m": 4626.0,
   "midpoint_distance_m": 4613.5,
   "start_elevation_m": 316.2707033733915,
   "end_elevation_m": 314.13369847510637,
   "start_xy": [
    682768.106708479,
    4716301.904143515
   ],
   "end_xy": [
    682758.3203175387,
    4716278.900938052
   ]
  },
  "min_50m": {
   "gradient_pct": -7.840748538153775,
   "start_distance_m": 4589.0,
   "end_distance_m": 4639.0,
   "midpoint_distance_m": 4614.0,
   "start_elevation_m": 317.1100747292245,
   "end_elevation_m": 313.1897004601476,
   "start_xy": [
    682772.8955614851,
    4716312.905453488
   ],
   "end_xy": [
    682753.3125316043,
    4716266.904186158
   ]
  },
  "min_100m": {
   "gradient_pct": -6.2292789767712975,
   "start_distance_m": 4554.0,
   "end_distance_m": 4654.0,
   "midpoint_distance_m": 4604.0,
   "start_elevation_m": 318.7090672765785,
   "end_elevation_m": 312.4797882998072,
   "start_xy": [
    682783.3043706509,
    4716346.22039105
   ],
   "end_xy": [
    682747.6572233584,
    4716253.016251039
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 18.419135111028595,
   "start_distance_m": 5565.0,
   "end_distance_m": 5567.0,
   "midpoint_distance_m": 5566.0,
   "start_elevation_m": 368.6565354762897,
   "end_elevation_m": 369.0249181785103,
   "start_xy": [
    682670.9454235707,
    4715431.515030238
   ],
   "end_xy": [
    682669.6038699149,
    4715430.031711784
   ]
  },
  "max_3m": {
   "gradient_pct": 18.595807546934868,
   "start_distance_m": 5565.0,
   "end_distance_m": 5568.0,
   "midpoint_distance_m": 5566.5,
   "start_elevation_m": 368.6565354762897,
   "end_elevation_m": 369.21440970269776,
   "start_xy": [
    682670.9454235707,
    4715431.515030238
   ],
   "end_xy": [
    682668.9327359839,
    4715429.290375708
   ]
  }
 },
 "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": 0.452,
   "obstruction_max_height_m": 268.48,
   "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/ma/USGS_1M_18_x68y472_MA_Western_B24.tif",
   "data/cache/usa/ma/USGS_1M_18_x68y473_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-09-03T08:53:27+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/east-buckland-road/east-buckland-road.geojson",
  "run_id": "canopy-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, MA_Western_B24 (collected 2023-24)",
  "elevation_tile_ids": [
   "x68y472",
   "x68y473"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/USGS_LPC_MA_ME_MA_QL1_UTM18_L1_2015_LAS_2018",
   "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": "Buckland",
  "county": "Massachusetts"
 }
}