{
 "ocl_version": "0.1.0",
 "name": "Westfield Drive",
 "slug": "westfield-drive",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.64071516510825,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 183.0,
   "end_distance_m": 185.0,
   "start_elevation_m": 34.35290334674553,
   "end_elevation_m": 35.00571765004769,
   "min_gradient_pct": 1.1339964261456004
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.707261173788407,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 183.0,
   "end_distance_m": 186.0,
   "start_elevation_m": 34.35290334674553,
   "end_elevation_m": 35.24412118195918,
   "min_gradient_pct": 1.7581938822377907
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.562647897646627,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 181.0,
   "end_distance_m": 186.0,
   "start_elevation_m": 33.91598878707685,
   "end_elevation_m": 35.24412118195918,
   "min_gradient_pct": 2.0523592786835465
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.182309285000798,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 180.0,
   "end_distance_m": 190.0,
   "start_elevation_m": 33.681908994362935,
   "end_elevation_m": 36.100139922863015,
   "min_gradient_pct": 2.343439738660109
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.960162379508517,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 179.0,
   "end_distance_m": 199.0,
   "start_elevation_m": 33.47513347376395,
   "end_elevation_m": 38.06716594966565,
   "min_gradient_pct": 3.2577855805071465
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.74889554372116,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 169.0,
   "end_distance_m": 194.0,
   "start_elevation_m": 31.316297130484703,
   "end_elevation_m": 37.00352101641499,
   "min_gradient_pct": 3.6337621830642064
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.677770845374624,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 149.0,
   "end_distance_m": 199.0,
   "start_elevation_m": 27.228280526978338,
   "end_elevation_m": 38.06716594966565,
   "min_gradient_pct": 5.540276527375255
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.19015504990628,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 101.0,
   "end_distance_m": 201.0,
   "start_elevation_m": 19.229153752094007,
   "end_elevation_m": 38.41930880200029,
   "min_gradient_pct": 6.593469531897533
  }
 ],
 "shape": {
  "ascent_concentration": 0.419,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 102.0,
  "shape_class": "sustained"
 },
 "length_m": 201.16520039740502,
 "start_elevation_m": 12.544169077358593,
 "end_elevation_m": 38.44617778880364,
 "endpoint_gain_m": 25.902008711445045,
 "overall_gradient_pct": 12.875988819276506,
 "accumulated_ascent_m": 25.902008711445045,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.562647897646627,
   "start_distance_m": 181.0,
   "end_distance_m": 186.0,
   "midpoint_distance_m": 183.5,
   "start_elevation_m": 33.91598878707685,
   "end_elevation_m": 35.24412118195918,
   "start_xy": [
    636758.8285531763,
    4527602.28405784
   ],
   "end_xy": [
    636755.3382217325,
    4527598.704607635
   ]
  },
  "max_10m": {
   "gradient_pct": 24.182309285000798,
   "start_distance_m": 180.0,
   "end_distance_m": 190.0,
   "midpoint_distance_m": 185.0,
   "start_elevation_m": 33.681908994362935,
   "end_elevation_m": 36.100139922863015,
   "start_xy": [
    636759.4750624353,
    4527603.0469639795
   ],
   "end_xy": [
    636752.5372770817,
    4527595.848962513
   ]
  },
  "max_20m": {
   "gradient_pct": 22.960162379508517,
   "start_distance_m": 179.0,
   "end_distance_m": 199.0,
   "midpoint_distance_m": 189.0,
   "start_elevation_m": 33.47513347376395,
   "end_elevation_m": 38.06716594966565,
   "start_xy": [
    636760.1215716944,
    4527603.809870119
   ],
   "end_xy": [
    636746.2351516178,
    4527589.423760988
   ]
  },
  "max_25m": {
   "gradient_pct": 22.74889554372116,
   "start_distance_m": 169.0,
   "end_distance_m": 194.0,
   "midpoint_distance_m": 181.5,
   "start_elevation_m": 31.316297130484703,
   "end_elevation_m": 37.00352101641499,
   "start_xy": [
    636766.586664285,
    4527611.438931515
   ],
   "end_xy": [
    636749.7363324311,
    4527592.993317391
   ]
  },
  "max_50m": {
   "gradient_pct": 21.677770845374624,
   "start_distance_m": 149.0,
   "end_distance_m": 199.0,
   "midpoint_distance_m": 174.0,
   "start_elevation_m": 27.228280526978338,
   "end_elevation_m": 38.06716594966565,
   "start_xy": [
    636779.5168494664,
    4527626.697054309
   ],
   "end_xy": [
    636746.2351516178,
    4527589.423760988
   ]
  },
  "max_100m": {
   "gradient_pct": 19.19015504990628,
   "start_distance_m": 101.0,
   "end_distance_m": 201.0,
   "midpoint_distance_m": 151.0,
   "start_elevation_m": 19.229153752094007,
   "end_elevation_m": 38.41930880200029,
   "start_xy": [
    636804.7114228815,
    4527666.507429393
   ],
   "end_xy": [
    636744.8346792924,
    4527587.995938427
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 2.0523592786835465,
   "start_distance_m": 2.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 12.590975869533523,
   "end_elevation_m": 12.6935938334677,
   "start_xy": [
    636788.0711055727,
    4527759.527602194
   ],
   "end_xy": [
    636791.9613695048,
    4527756.38660768
   ]
  },
  "min_10m": {
   "gradient_pct": 2.343439738660109,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 12.544169077358593,
   "end_elevation_m": 12.778513051224603,
   "start_xy": [
    636786.515,
    4527760.784
   ],
   "end_xy": [
    636794.2955278639,
    4527754.502010971
   ]
  },
  "min_20m": {
   "gradient_pct": 3.2577855805071465,
   "start_distance_m": 64.0,
   "end_distance_m": 84.0,
   "midpoint_distance_m": 74.0,
   "start_elevation_m": 17.46846881502527,
   "end_elevation_m": 18.120025931126698,
   "start_xy": [
    636804.972715005,
    4527703.332894907
   ],
   "end_xy": [
    636806.0569958837,
    4527683.373845691
   ]
  },
  "min_25m": {
   "gradient_pct": 3.6337621830642064,
   "start_distance_m": 64.0,
   "end_distance_m": 89.0,
   "midpoint_distance_m": 76.5,
   "start_elevation_m": 17.46846881502527,
   "end_elevation_m": 18.37690936079132,
   "start_xy": [
    636804.972715005,
    4527703.332894907
   ],
   "end_xy": [
    636805.9648309986,
    4527678.3746952
   ]
  },
  "min_50m": {
   "gradient_pct": 5.540276527375255,
   "start_distance_m": 53.0,
   "end_distance_m": 103.0,
   "midpoint_distance_m": 78.0,
   "start_elevation_m": 16.638134643948682,
   "end_elevation_m": 19.40827290763631,
   "start_xy": [
    636804.2002583769,
    4527714.305739133
   ],
   "end_xy": [
    636804.2487346092,
    4527664.561685432
   ]
  },
  "min_100m": {
   "gradient_pct": 6.593469531897533,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 12.544169077358593,
   "end_elevation_m": 19.137638609256125,
   "start_xy": [
    636786.515,
    4527760.784
   ],
   "end_xy": [
    636804.9427670176,
    4527667.480301374
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.64071516510825,
   "start_distance_m": 183.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 184.0,
   "start_elevation_m": 34.35290334674553,
   "end_elevation_m": 35.00571765004769,
   "start_xy": [
    636757.4389302206,
    4527600.846341477
   ],
   "end_xy": [
    636756.0384578952,
    4527599.418518916
   ]
  },
  "max_3m": {
   "gradient_pct": 29.707261173788407,
   "start_distance_m": 183.0,
   "end_distance_m": 186.0,
   "midpoint_distance_m": 184.5,
   "start_elevation_m": 34.35290334674553,
   "end_elevation_m": 35.24412118195918,
   "start_xy": [
    636757.4389302206,
    4527600.846341477
   ],
   "end_xy": [
    636755.3382217325,
    4527598.704607635
   ]
  }
 },
 "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": 0.527,
   "obstruction_max_height_m": 26.65,
   "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/ny/USGS_1M_18_x63y453_NY_LongIsland_A24.tif"
  ],
  "calculated_at": "2026-09-06T11:39:19+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": [
   "x63y453"
  ],
  "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": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Huntington",
  "county": "New York"
 }
}