{
 "ocl_version": "0.1.0",
 "name": "Old Forty Acre Mountain Road",
 "slug": "old-forty-acre-mountain-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.22570793018275,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 545.0,
   "end_distance_m": 547.0,
   "start_elevation_m": 186.83602749265268,
   "end_elevation_m": 187.34054165125633,
   "min_gradient_pct": -3.233717115931256
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.59617286139159,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 545.0,
   "end_distance_m": 548.0,
   "start_elevation_m": 186.83602749265268,
   "end_elevation_m": 187.57391267849442,
   "min_gradient_pct": -2.885923153965564
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.58837078238082,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 545.0,
   "end_distance_m": 550.0,
   "start_elevation_m": 186.83602749265268,
   "end_elevation_m": 188.01544603177172,
   "min_gradient_pct": -1.2248732199640244
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.49696086065427,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 541.0,
   "end_distance_m": 551.0,
   "start_elevation_m": 186.00633004518426,
   "end_elevation_m": 188.25602613124968,
   "min_gradient_pct": 1.2028799931724166
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.830182612430207,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 532.0,
   "end_distance_m": 552.0,
   "start_elevation_m": 184.10326126618054,
   "end_elevation_m": 188.46929778866658,
   "min_gradient_pct": 2.0296074643633233
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.515634114295153,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 530.0,
   "end_distance_m": 555.0,
   "start_elevation_m": 183.6977907609027,
   "end_elevation_m": 189.0766992894765,
   "min_gradient_pct": 2.299610623528338
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.30645160165102,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 512.0,
   "end_distance_m": 562.0,
   "start_elevation_m": 180.71598965219272,
   "end_elevation_m": 190.36921545301823,
   "min_gradient_pct": 3.587298453275082
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.596375273960374,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 471.0,
   "end_distance_m": 571.0,
   "start_elevation_m": 177.0936897801014,
   "end_elevation_m": 191.6900650540618,
   "min_gradient_pct": 6.552954392136371
  }
 ],
 "shape": {
  "ascent_concentration": 0.323,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 77.0,
  "shape_class": "sustained"
 },
 "length_m": 575.2771744367968,
 "start_elevation_m": 133.84827517700202,
 "end_elevation_m": 192.18962618072672,
 "endpoint_gain_m": 58.3413510037247,
 "overall_gradient_pct": 10.141433311836431,
 "accumulated_ascent_m": 58.42792869834366,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.58837078238082,
   "start_distance_m": 545.0,
   "end_distance_m": 550.0,
   "midpoint_distance_m": 547.5,
   "start_elevation_m": 186.83602749265268,
   "end_elevation_m": 188.01544603177172,
   "start_xy": [
    631326.8422810232,
    4590199.4664070085
   ],
   "end_xy": [
    631329.4883424833,
    4590203.708854004
   ]
  },
  "max_10m": {
   "gradient_pct": 22.49696086065427,
   "start_distance_m": 541.0,
   "end_distance_m": 551.0,
   "midpoint_distance_m": 546.0,
   "start_elevation_m": 186.00633004518426,
   "end_elevation_m": 188.25602613124968,
   "start_xy": [
    631324.5591079127,
    4590196.185287876
   ],
   "end_xy": [
    631330.0175797611,
    4590204.557327618
   ]
  },
  "max_20m": {
   "gradient_pct": 21.830182612430207,
   "start_distance_m": 532.0,
   "end_distance_m": 552.0,
   "midpoint_distance_m": 542.0,
   "start_elevation_m": 184.10326126618054,
   "end_elevation_m": 188.46929778866658,
   "start_xy": [
    631319.1708927553,
    4590188.976465045
   ],
   "end_xy": [
    631330.5471716982,
    4590205.405579909
   ]
  },
  "max_25m": {
   "gradient_pct": 21.515634114295153,
   "start_distance_m": 530.0,
   "end_distance_m": 555.0,
   "midpoint_distance_m": 542.5,
   "start_elevation_m": 183.6977907609027,
   "end_elevation_m": 189.0766992894765,
   "start_xy": [
    631317.9726257062,
    4590187.375167608
   ],
   "end_xy": [
    631332.0912995581,
    4590207.976885255
   ]
  },
  "max_50m": {
   "gradient_pct": 19.30645160165102,
   "start_distance_m": 512.0,
   "end_distance_m": 562.0,
   "midpoint_distance_m": 537.0,
   "start_elevation_m": 180.71598965219272,
   "end_elevation_m": 190.36921545301823,
   "start_xy": [
    631303.6482907751,
    4590176.739714173
   ],
   "end_xy": [
    631335.4103559904,
    4590214.139990024
   ]
  },
  "max_100m": {
   "gradient_pct": 14.596375273960374,
   "start_distance_m": 471.0,
   "end_distance_m": 571.0,
   "midpoint_distance_m": 521.0,
   "start_elevation_m": 177.0936897801014,
   "end_elevation_m": 191.6900650540618,
   "start_xy": [
    631267.4833799689,
    4590157.845602272
   ],
   "end_xy": [
    631338.6466364318,
    4590222.501593892
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.2248732199640244,
   "start_distance_m": 153.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 155.5,
   "start_elevation_m": 149.86714324989157,
   "end_elevation_m": 149.80589958889337,
   "start_xy": [
    631199.0174102931,
    4589885.015869993
   ],
   "end_xy": [
    631202.2119930881,
    4589888.862249898
   ]
  },
  "min_10m": {
   "gradient_pct": 1.2028799931724166,
   "start_distance_m": 152.0,
   "end_distance_m": 162.0,
   "midpoint_distance_m": 157.0,
   "start_elevation_m": 149.83137373019764,
   "end_elevation_m": 149.95166172951488,
   "start_xy": [
    631198.580506222,
    4589884.120577033
   ],
   "end_xy": [
    631204.7683416174,
    4589891.938787239
   ]
  },
  "min_20m": {
   "gradient_pct": 2.0296074643633233,
   "start_distance_m": 153.0,
   "end_distance_m": 173.0,
   "midpoint_distance_m": 163.0,
   "start_elevation_m": 149.86714324989157,
   "end_elevation_m": 150.27306474276423,
   "start_xy": [
    631199.0174102931,
    4589885.015869993
   ],
   "end_xy": [
    631208.960536738,
    4589902.050939122
   ]
  },
  "min_25m": {
   "gradient_pct": 2.299610623528338,
   "start_distance_m": 152.0,
   "end_distance_m": 177.0,
   "midpoint_distance_m": 164.5,
   "start_elevation_m": 149.83137373019764,
   "end_elevation_m": 150.40627638607972,
   "start_xy": [
    631198.580506222,
    4589884.120577033
   ],
   "end_xy": [
    631210.340669672,
    4589905.805300933
   ]
  },
  "min_50m": {
   "gradient_pct": 3.587298453275082,
   "start_distance_m": 395.0,
   "end_distance_m": 445.0,
   "midpoint_distance_m": 420.0,
   "start_elevation_m": 172.22399559211803,
   "end_elevation_m": 174.01764481875557,
   "start_xy": [
    631218.845940355,
    4590112.366001943
   ],
   "end_xy": [
    631242.4625775022,
    4590155.751410891
   ]
  },
  "min_100m": {
   "gradient_pct": 6.552954392136371,
   "start_distance_m": 349.0,
   "end_distance_m": 449.0,
   "midpoint_distance_m": 399.0,
   "start_elevation_m": 167.84809278462404,
   "end_elevation_m": 174.40104717676041,
   "start_xy": [
    631210.7594769866,
    4590067.1948496085
   ],
   "end_xy": [
    631245.9789314071,
    4590157.4634226905
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.22570793018275,
   "start_distance_m": 545.0,
   "end_distance_m": 547.0,
   "midpoint_distance_m": 546.0,
   "start_elevation_m": 186.83602749265268,
   "end_elevation_m": 187.34054165125633,
   "start_xy": [
    631326.8422810232,
    4590199.4664070085
   ],
   "end_xy": [
    631327.9003904205,
    4590201.163582375
   ]
  },
  "max_3m": {
   "gradient_pct": 24.59617286139159,
   "start_distance_m": 545.0,
   "end_distance_m": 548.0,
   "midpoint_distance_m": 546.5,
   "start_elevation_m": 186.83602749265268,
   "end_elevation_m": 187.57391267849442,
   "start_xy": [
    631326.8422810232,
    4590199.4664070085
   ],
   "end_xy": [
    631328.4297640825,
    4590202.011971144
   ]
  }
 },
 "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": 0.809,
   "obstruction_max_height_m": 28.12,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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/ct/USGS_1M_18_x63y459_CT_Statewide_C16.tif",
   "data/cache/usa/ct/USGS_1M_18_x63y460_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-09-03T19:36:39+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/old-forty-acre-mountain-road/old-forty-acre-mountain-road.geojson",
  "run_id": "canopy-all-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, CT_Statewide_C16 (collected 2016)",
  "elevation_tile_ids": [
   "x63y459",
   "x63y460"
  ],
  "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_Sandy_2014_LAS_2015",
   "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": "Danbury",
  "county": "Connecticut"
 }
}