{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (40.8694, -73.5456)",
 "slug": "discovered-lane-40-8694-73-5456",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 26.762375101130154,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 66.0,
   "end_distance_m": 68.0,
   "start_elevation_m": 31.347638082328846,
   "end_elevation_m": 31.88288558435145,
   "min_gradient_pct": -7.748980240729608
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.538259273332915,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 65.0,
   "end_distance_m": 68.0,
   "start_elevation_m": 31.08673780615146,
   "end_elevation_m": 31.88288558435145,
   "min_gradient_pct": -7.230356049738636
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.38397682935731,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 63.0,
   "end_distance_m": 68.0,
   "start_elevation_m": 30.613686742883583,
   "end_elevation_m": 31.88288558435145,
   "min_gradient_pct": -6.553728632827074
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.755949540426094,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 52.0,
   "end_distance_m": 62.0,
   "start_elevation_m": 27.899396274796832,
   "end_elevation_m": 30.37499122883944,
   "min_gradient_pct": -5.588136556024992
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.605568778682496,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 48.0,
   "end_distance_m": 68.0,
   "start_elevation_m": 26.96177182861495,
   "end_elevation_m": 31.88288558435145,
   "min_gradient_pct": -3.6484648975089584
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.281898088846106,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 43.0,
   "end_distance_m": 68.0,
   "start_elevation_m": 25.812411062139923,
   "end_elevation_m": 31.88288558435145,
   "min_gradient_pct": -3.157201033196145
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 23.694189074826784,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 40.0,
   "end_distance_m": 90.0,
   "start_elevation_m": 25.149348496907624,
   "end_elevation_m": 36.99644303432102,
   "min_gradient_pct": 0.7499106155340627
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.694518001457297,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 23.0,
   "end_distance_m": 123.0,
   "start_elevation_m": 21.87436372950298,
   "end_elevation_m": 43.56888173096028,
   "min_gradient_pct": 7.822861631647186
  }
 ],
 "shape": {
  "ascent_concentration": 0.415,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 150.0,
  "shape_class": "sustained"
 },
 "length_m": 208.54361620509752,
 "start_elevation_m": 19.83173256131872,
 "end_elevation_m": 48.4590709005834,
 "endpoint_gain_m": 28.62733833926468,
 "overall_gradient_pct": 13.72726667936476,
 "accumulated_ascent_m": 29.566670542214815,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.38397682935731,
   "start_distance_m": 63.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 65.5,
   "start_elevation_m": 30.613686742883583,
   "end_elevation_m": 31.88288558435145,
   "start_xy": [
    622556.2091768305,
    4525194.689564419
   ],
   "end_xy": [
    622556.6619307948,
    4525199.669023612
   ]
  },
  "max_10m": {
   "gradient_pct": 24.755949540426094,
   "start_distance_m": 52.0,
   "end_distance_m": 62.0,
   "midpoint_distance_m": 57.0,
   "start_elevation_m": 27.899396274796832,
   "end_elevation_m": 30.37499122883944,
   "start_xy": [
    622555.1576950205,
    4525183.740364943
   ],
   "end_xy": [
    622556.1186260376,
    4525193.693672581
   ]
  },
  "max_20m": {
   "gradient_pct": 24.605568778682496,
   "start_distance_m": 48.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 58.0,
   "start_elevation_m": 26.96177182861495,
   "end_elevation_m": 31.88288558435145,
   "start_xy": [
    622554.714180019,
    4525179.765029178
   ],
   "end_xy": [
    622556.6619307948,
    4525199.669023612
   ]
  },
  "max_25m": {
   "gradient_pct": 24.281898088846106,
   "start_distance_m": 43.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 55.5,
   "start_elevation_m": 25.812411062139923,
   "end_elevation_m": 31.88288558435145,
   "start_xy": [
    622554.159786267,
    4525174.795859472
   ],
   "end_xy": [
    622556.6619307948,
    4525199.669023612
   ]
  },
  "max_50m": {
   "gradient_pct": 23.694189074826784,
   "start_distance_m": 40.0,
   "end_distance_m": 90.0,
   "midpoint_distance_m": 65.0,
   "start_elevation_m": 25.149348496907624,
   "end_elevation_m": 36.99644303432102,
   "start_xy": [
    622553.8271500157,
    4525171.814357649
   ],
   "end_xy": [
    622558.6540482381,
    4525221.578644058
   ]
  },
  "max_100m": {
   "gradient_pct": 21.694518001457297,
   "start_distance_m": 23.0,
   "end_distance_m": 123.0,
   "midpoint_distance_m": 73.0,
   "start_elevation_m": 21.87436372950298,
   "end_elevation_m": 43.56888173096028,
   "start_xy": [
    622551.942211259,
    4525154.9191806475
   ],
   "end_xy": [
    622561.642224403,
    4525254.4430747265
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.553728632827074,
   "start_distance_m": 203.0,
   "end_distance_m": 208.0,
   "midpoint_distance_m": 205.5,
   "start_elevation_m": 48.81996155367351,
   "end_elevation_m": 48.492275122032154,
   "start_xy": [
    622568.2129275121,
    4525334.171719775
   ],
   "end_xy": [
    622568.6080418847,
    4525339.15608379
   ]
  },
  "min_10m": {
   "gradient_pct": -5.588136556024992,
   "start_distance_m": 198.0,
   "end_distance_m": 208.0,
   "midpoint_distance_m": 203.0,
   "start_elevation_m": 49.051088777634654,
   "end_elevation_m": 48.492275122032154,
   "start_xy": [
    622567.8178131394,
    4525329.1873557605
   ],
   "end_xy": [
    622568.6080418847,
    4525339.15608379
   ]
  },
  "min_20m": {
   "gradient_pct": -3.6484648975089584,
   "start_distance_m": 188.0,
   "end_distance_m": 208.0,
   "midpoint_distance_m": 198.0,
   "start_elevation_m": 49.221968101533946,
   "end_elevation_m": 48.492275122032154,
   "start_xy": [
    622567.027584394,
    4525319.21862773
   ],
   "end_xy": [
    622568.6080418847,
    4525339.15608379
   ]
  },
  "min_25m": {
   "gradient_pct": -3.157201033196145,
   "start_distance_m": 183.0,
   "end_distance_m": 208.0,
   "midpoint_distance_m": 195.5,
   "start_elevation_m": 49.28157538033119,
   "end_elevation_m": 48.492275122032154,
   "start_xy": [
    622566.6324700213,
    4525314.234263715
   ],
   "end_xy": [
    622568.6080418847,
    4525339.15608379
   ]
  },
  "min_50m": {
   "gradient_pct": 0.7499106155340627,
   "start_distance_m": 158.0,
   "end_distance_m": 208.0,
   "midpoint_distance_m": 183.0,
   "start_elevation_m": 48.11731981426512,
   "end_elevation_m": 48.492275122032154,
   "start_xy": [
    622564.6570073725,
    4525289.312434984
   ],
   "end_xy": [
    622568.6080418847,
    4525339.15608379
   ]
  },
  "min_100m": {
   "gradient_pct": 7.822861631647186,
   "start_distance_m": 108.0,
   "end_distance_m": 208.0,
   "midpoint_distance_m": 158.0,
   "start_elevation_m": 40.66941349038497,
   "end_elevation_m": 48.492275122032154,
   "start_xy": [
    622560.2839625098,
    4525239.50469715
   ],
   "end_xy": [
    622568.6080418847,
    4525339.15608379
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 26.762375101130154,
   "start_distance_m": 66.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 67.0,
   "start_elevation_m": 31.347638082328846,
   "end_elevation_m": 31.88288558435145,
   "start_xy": [
    622556.4808292091,
    4525197.677239935
   ],
   "end_xy": [
    622556.6619307948,
    4525199.669023612
   ]
  },
  "max_3m": {
   "gradient_pct": 26.538259273332915,
   "start_distance_m": 65.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 66.5,
   "start_elevation_m": 31.08673780615146,
   "end_elevation_m": 31.88288558435145,
   "start_xy": [
    622556.3902784162,
    4525196.681348097
   ],
   "end_xy": [
    622556.6619307948,
    4525199.669023612
   ]
  }
 },
 "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": 0.719,
   "obstruction_max_height_m": 23.16,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "descends_at_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/ny/USGS_1M_18_x62y453_NY_LongIsland_A24.tif"
  ],
  "calculated_at": "2026-09-06T11:50:17+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/new-york-2026-09-06-batch-band3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "ny-run3-260906",
  "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, NY_LongIsland_A24 (collected 2024)",
  "elevation_tile_ids": [
   "x62y453"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/USGS_LPC_NY_LongIsland_Z18_2014_LAS_2015",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.995,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Oyster Bay",
  "county": "New York"
 }
}