{
 "ocl_version": "0.1.0",
 "name": "Oak Drive",
 "slug": "oak-drive",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.477083320063485,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 746.0,
   "end_distance_m": 748.0,
   "start_elevation_m": 121.20978335382591,
   "end_elevation_m": 121.67932502022718,
   "min_gradient_pct": -3.3013818624709756
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.31923487368262,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 745.0,
   "end_distance_m": 748.0,
   "start_elevation_m": 120.9797479740167,
   "end_elevation_m": 121.67932502022718,
   "min_gradient_pct": -2.3590236853811084
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.760070368301513,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 745.0,
   "end_distance_m": 750.0,
   "start_elevation_m": 120.9797479740167,
   "end_elevation_m": 122.11775149243178,
   "min_gradient_pct": -0.7624980923742442
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.806334021023304,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 744.0,
   "end_distance_m": 754.0,
   "start_elevation_m": 120.76518810028358,
   "end_elevation_m": 122.94582150238591,
   "min_gradient_pct": 0.40613105380870707
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.574302936767026,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 742.0,
   "end_distance_m": 762.0,
   "start_elevation_m": 120.33379671809405,
   "end_elevation_m": 124.44865730544745,
   "min_gradient_pct": 0.7445006838874235
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.131704288079277,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 737.0,
   "end_distance_m": 762.0,
   "start_elevation_m": 119.41573123342764,
   "end_elevation_m": 124.44865730544745,
   "min_gradient_pct": 0.835202763798236
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 15.616813470393083,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 724.0,
   "end_distance_m": 774.0,
   "start_elevation_m": 118.1089871928138,
   "end_elevation_m": 125.91739392801034,
   "min_gradient_pct": 1.9153457947087134
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 11.72655452563987,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 685.0,
   "end_distance_m": 785.0,
   "start_elevation_m": 114.91696779096118,
   "end_elevation_m": 126.64352231660105,
   "min_gradient_pct": 2.604227997252508
  }
 ],
 "shape": {
  "ascent_concentration": 0.377,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 49.0,
  "shape_class": "sustained"
 },
 "length_m": 876.0529041429273,
 "start_elevation_m": 78.15366677917096,
 "end_elevation_m": 128.9656244392206,
 "endpoint_gain_m": 50.81195766004963,
 "overall_gradient_pct": 5.80010150297495,
 "accumulated_ascent_m": 50.9600462872684,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.760070368301513,
   "start_distance_m": 745.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 747.5,
   "start_elevation_m": 120.9797479740167,
   "end_elevation_m": 122.11775149243178,
   "start_xy": [
    663495.5973232131,
    4590082.0849089995
   ],
   "end_xy": [
    663494.4017178667,
    4590086.939857538
   ]
  },
  "max_10m": {
   "gradient_pct": 21.806334021023304,
   "start_distance_m": 744.0,
   "end_distance_m": 754.0,
   "midpoint_distance_m": 749.0,
   "start_elevation_m": 120.76518810028358,
   "end_elevation_m": 122.94582150238591,
   "start_xy": [
    663495.8286693124,
    4590081.112062344
   ],
   "end_xy": [
    663493.4456997021,
    4590090.8239313355
   ]
  },
  "max_20m": {
   "gradient_pct": 20.574302936767026,
   "start_distance_m": 742.0,
   "end_distance_m": 762.0,
   "midpoint_distance_m": 752.0,
   "start_elevation_m": 120.33379671809405,
   "end_elevation_m": 124.44865730544745,
   "start_xy": [
    663496.2008556916,
    4590079.147397724
   ],
   "end_xy": [
    663491.5336633731,
    4590098.592078932
   ]
  },
  "max_25m": {
   "gradient_pct": 20.131704288079277,
   "start_distance_m": 737.0,
   "end_distance_m": 762.0,
   "midpoint_distance_m": 749.5,
   "start_elevation_m": 119.41573123342764,
   "end_elevation_m": 124.44865730544745,
   "start_xy": [
    663497.0818160815,
    4590074.22561918
   ],
   "end_xy": [
    663491.5336633731,
    4590098.592078932
   ]
  },
  "max_50m": {
   "gradient_pct": 15.616813470393083,
   "start_distance_m": 724.0,
   "end_distance_m": 774.0,
   "midpoint_distance_m": 749.0,
   "start_elevation_m": 118.1089871928138,
   "end_elevation_m": 125.91739392801034,
   "start_xy": [
    663499.3728015311,
    4590061.42908234
   ],
   "end_xy": [
    663488.6646661153,
    4590110.244067791
   ]
  },
  "max_100m": {
   "gradient_pct": 11.72655452563987,
   "start_distance_m": 685.0,
   "end_distance_m": 785.0,
   "midpoint_distance_m": 735.0,
   "start_elevation_m": 114.91696779096118,
   "end_elevation_m": 126.64352231660105,
   "start_xy": [
    663506.9924082522,
    4590023.191517811
   ],
   "end_xy": [
    663495.031634614,
    4590112.329441619
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.7624980923742442,
   "start_distance_m": 130.0,
   "end_distance_m": 135.0,
   "midpoint_distance_m": 132.5,
   "start_elevation_m": 81.88830297936752,
   "end_elevation_m": 81.85017807474881,
   "start_xy": [
    664012.1072441658,
    4590059.092130129
   ],
   "end_xy": [
    664009.0278894879,
    4590059.321096586
   ]
  },
  "min_10m": {
   "gradient_pct": 0.40613105380870707,
   "start_distance_m": 802.0,
   "end_distance_m": 812.0,
   "midpoint_distance_m": 807.0,
   "start_elevation_m": 127.25724912633592,
   "end_elevation_m": 127.29786223171679,
   "start_xy": [
    663511.6445697021,
    4590108.722455705
   ],
   "end_xy": [
    663521.4170273066,
    4590106.601356409
   ]
  },
  "min_20m": {
   "gradient_pct": 0.7445006838874235,
   "start_distance_m": 802.0,
   "end_distance_m": 822.0,
   "midpoint_distance_m": 812.0,
   "start_elevation_m": 127.25724912633592,
   "end_elevation_m": 127.4061492631134,
   "start_xy": [
    663511.6445697021,
    4590108.722455705
   ],
   "end_xy": [
    663531.1894068938,
    4590104.479899009
   ]
  },
  "min_25m": {
   "gradient_pct": 0.835202763798236,
   "start_distance_m": 800.0,
   "end_distance_m": 825.0,
   "midpoint_distance_m": 812.5,
   "start_elevation_m": 127.23622184720057,
   "end_elevation_m": 127.44502253815013,
   "start_xy": [
    663509.6901209163,
    4590109.1468724385
   ],
   "end_xy": [
    663534.1211213955,
    4590103.843464483
   ]
  },
  "min_50m": {
   "gradient_pct": 1.9153457947087134,
   "start_distance_m": 795.0,
   "end_distance_m": 845.0,
   "midpoint_distance_m": 820.0,
   "start_elevation_m": 127.12973528739231,
   "end_elevation_m": 128.08740818474666,
   "start_xy": [
    663504.8038845187,
    4590110.207387392
   ],
   "end_xy": [
    663553.6658474387,
    4590099.600395438
   ]
  },
  "min_100m": {
   "gradient_pct": 2.604227997252508,
   "start_distance_m": 36.0,
   "end_distance_m": 136.0,
   "midpoint_distance_m": 86.0,
   "start_elevation_m": 79.27562196660085,
   "end_elevation_m": 81.87984996385336,
   "start_xy": [
    664003.3834339462,
    4589965.549443797
   ],
   "end_xy": [
    664008.1275405352,
    4590058.885927925
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.477083320063485,
   "start_distance_m": 746.0,
   "end_distance_m": 748.0,
   "midpoint_distance_m": 747.0,
   "start_elevation_m": 121.20978335382591,
   "end_elevation_m": 121.67932502022718,
   "start_xy": [
    663495.3577360312,
    4590083.055783739
   ],
   "end_xy": [
    663494.879726949,
    4590084.997820638
   ]
  },
  "max_3m": {
   "gradient_pct": 23.31923487368262,
   "start_distance_m": 745.0,
   "end_distance_m": 748.0,
   "midpoint_distance_m": 746.5,
   "start_elevation_m": 120.9797479740167,
   "end_elevation_m": 121.67932502022718,
   "start_xy": [
    663495.5973232131,
    4590082.0849089995
   ],
   "end_xy": [
    663494.879726949,
    4590084.997820638
   ]
  }
 },
 "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": 0.419,
   "obstruction_max_height_m": 29.74,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": []
 },
 "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_x66y459_CT_Statewide_C16.tif",
   "data/cache/usa/ct/USGS_1M_18_x66y460_CT_Statewide_C16.tif"
  ],
  "calculated_at": "2026-09-03T19:28:26+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/oak-drive/oak-drive.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": [
   "x66y459",
   "x66y460"
  ],
  "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": "Beacon Falls",
  "county": "Connecticut"
 }
}