{
 "ocl_version": "0.1.0",
 "name": "Beach Plum Drive",
 "slug": "beach-plum-drive",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 43.7555000853628,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 252.0,
   "end_distance_m": 254.0,
   "start_elevation_m": 41.7832648269313,
   "end_elevation_m": 42.65837482863856,
   "min_gradient_pct": -11.162795344444643
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 40.887101037986895,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 252.0,
   "end_distance_m": 255.0,
   "start_elevation_m": 41.7832648269313,
   "end_elevation_m": 43.00987785807091,
   "min_gradient_pct": -11.102700741758653
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.08631363813541,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 251.0,
   "end_distance_m": 256.0,
   "start_elevation_m": 41.52264198245549,
   "end_elevation_m": 43.22695766436226,
   "min_gradient_pct": -11.124495139127646
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.770827863769185,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 233.0,
   "end_distance_m": 243.0,
   "start_elevation_m": 38.43196157908069,
   "end_elevation_m": 40.90904436545761,
   "min_gradient_pct": -9.157204524186877
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.603932253893916,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 223.0,
   "end_distance_m": 243.0,
   "start_elevation_m": 36.58825791467883,
   "end_elevation_m": 40.90904436545761,
   "min_gradient_pct": -7.751104207930064
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.04293957773939,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 218.0,
   "end_distance_m": 243.0,
   "start_elevation_m": 35.64830947102276,
   "end_elevation_m": 40.90904436545761,
   "min_gradient_pct": -7.200343508603659
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.53592762882161,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 206.0,
   "end_distance_m": 256.0,
   "start_elevation_m": 33.458993849951455,
   "end_elevation_m": 43.22695766436226,
   "min_gradient_pct": 0.13845489423420432
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.59948247144198,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 157.0,
   "end_distance_m": 257.0,
   "start_elevation_m": 25.786182881129825,
   "end_elevation_m": 43.385665352571806,
   "min_gradient_pct": 3.493823230578599
  }
 ],
 "shape": {
  "ascent_concentration": 0.426,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 159.0,
  "shape_class": "sustained"
 },
 "length_m": 311.3999999998608,
 "start_elevation_m": 14.981502124062558,
 "end_elevation_m": 46.78285081510104,
 "endpoint_gain_m": 31.801348691038484,
 "overall_gradient_pct": 10.212379155765156,
 "accumulated_ascent_m": 33.756216873121694,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.08631363813541,
   "start_distance_m": 251.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 253.5,
   "start_elevation_m": 41.52264198245549,
   "end_elevation_m": 43.22695766436226,
   "start_xy": [
    637798.9328397365,
    4528977.251621764
   ],
   "end_xy": [
    637793.9619476495,
    4528976.71289005
   ]
  },
  "max_10m": {
   "gradient_pct": 24.770827863769185,
   "start_distance_m": 233.0,
   "end_distance_m": 243.0,
   "midpoint_distance_m": 238.0,
   "start_elevation_m": 38.43196157908069,
   "end_elevation_m": 40.90904436545761,
   "start_xy": [
    637816.8284571709,
    4528979.187306321
   ],
   "end_xy": [
    637806.8864167866,
    4528978.112209583
   ]
  },
  "max_20m": {
   "gradient_pct": 21.603932253893916,
   "start_distance_m": 223.0,
   "end_distance_m": 243.0,
   "midpoint_distance_m": 233.0,
   "start_elevation_m": 36.58825791467883,
   "end_elevation_m": 40.90904436545761,
   "start_xy": [
    637826.7704975551,
    4528980.26240306
   ],
   "end_xy": [
    637806.8864167866,
    4528978.112209583
   ]
  },
  "max_25m": {
   "gradient_pct": 21.04293957773939,
   "start_distance_m": 218.0,
   "end_distance_m": 243.0,
   "midpoint_distance_m": 230.5,
   "start_elevation_m": 35.64830947102276,
   "end_elevation_m": 40.90904436545761,
   "start_xy": [
    637831.7415177473,
    4528980.799951429
   ],
   "end_xy": [
    637806.8864167866,
    4528978.112209583
   ]
  },
  "max_50m": {
   "gradient_pct": 19.53592762882161,
   "start_distance_m": 206.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 231.0,
   "start_elevation_m": 33.458993849951455,
   "end_elevation_m": 43.22695766436226,
   "start_xy": [
    637843.6719662085,
    4528982.090067515
   ],
   "end_xy": [
    637793.9619476495,
    4528976.71289005
   ]
  },
  "max_100m": {
   "gradient_pct": 17.59948247144198,
   "start_distance_m": 157.0,
   "end_distance_m": 257.0,
   "midpoint_distance_m": 207.0,
   "start_elevation_m": 25.786182881129825,
   "end_elevation_m": 43.385665352571806,
   "start_xy": [
    637892.3879640915,
    4528987.358041533
   ],
   "end_xy": [
    637792.9677692321,
    4528976.605143707
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.124495139127646,
   "start_distance_m": 15.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 17.5,
   "start_elevation_m": 14.398612731390404,
   "end_elevation_m": 13.842387974434022,
   "start_xy": [
    637995.7590432422,
    4529030.8735410925
   ],
   "end_xy": [
    638000.6545272585,
    4529030.799907134
   ]
  },
  "min_10m": {
   "gradient_pct": -9.157204524186877,
   "start_distance_m": 12.0,
   "end_distance_m": 22.0,
   "midpoint_distance_m": 17.0,
   "start_elevation_m": 14.606520854670197,
   "end_elevation_m": 13.69080040225151,
   "start_xy": [
    637994.7716556636,
    4529028.0406863885
   ],
   "end_xy": [
    638002.6525787243,
    4529030.711644231
   ]
  },
  "min_20m": {
   "gradient_pct": -7.751104207930064,
   "start_distance_m": 7.0,
   "end_distance_m": 27.0,
   "midpoint_distance_m": 17.0,
   "start_elevation_m": 14.979978025778996,
   "end_elevation_m": 13.429757184192983,
   "start_xy": [
    637993.1260096992,
    4529023.319261883
   ],
   "end_xy": [
    638005.0721998189,
    4529026.561139806
   ]
  },
  "min_25m": {
   "gradient_pct": -7.200343508603659,
   "start_distance_m": 7.0,
   "end_distance_m": 32.0,
   "midpoint_distance_m": 19.5,
   "start_elevation_m": 14.979978025778996,
   "end_elevation_m": 13.179892148628081,
   "start_xy": [
    637993.1260096992,
    4529023.319261883
   ],
   "end_xy": [
    638005.877387067,
    4529021.860374969
   ]
  },
  "min_50m": {
   "gradient_pct": 0.13845489423420432,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 14.981502124062558,
   "end_elevation_m": 15.05072957117966,
   "start_xy": [
    637992.433,
    4529016.414
   ],
   "end_xy": [
    637991.9004905222,
    4529015.954355064
   ]
  },
  "min_100m": {
   "gradient_pct": 3.493823230578599,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 14.981502124062558,
   "end_elevation_m": 18.475325354641157,
   "start_xy": [
    637992.433,
    4529016.414
   ],
   "end_xy": [
    637949.0507008671,
    4528993.549394486
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 43.7555000853628,
   "start_distance_m": 252.0,
   "end_distance_m": 254.0,
   "midpoint_distance_m": 253.0,
   "start_elevation_m": 41.7832648269313,
   "end_elevation_m": 42.65837482863856,
   "start_xy": [
    637797.9386613191,
    4528977.143875421
   ],
   "end_xy": [
    637795.9503044842,
    4528976.928382736
   ]
  },
  "max_3m": {
   "gradient_pct": 40.887101037986895,
   "start_distance_m": 252.0,
   "end_distance_m": 255.0,
   "midpoint_distance_m": 253.5,
   "start_elevation_m": 41.7832648269313,
   "end_elevation_m": 43.00987785807091,
   "start_xy": [
    637797.9386613191,
    4528977.143875421
   ],
   "end_xy": [
    637794.9561260669,
    4528976.820636393
   ]
  }
 },
 "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": 0.396,
   "obstruction_max_height_m": 25.93,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [
   "short_window_divergence"
  ],
  "extent": [
   "descends_at_start"
  ]
 },
 "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_x63y453_NY_LongIsland_A24.tif"
  ],
  "calculated_at": "2026-09-06T17:31:51+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.osm.pbf",
  "osm_snapshot": "2026-09-04T20:21:21Z",
  "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": [
   "x63y453"
  ],
  "route_cut_m": 311.4,
  "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": 0.994,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Huntington",
  "county": "New York"
 }
}