{
 "ocl_version": "0.1.0",
 "name": "Seneca Drive",
 "slug": "seneca-drive",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.917315789768566,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 285.0,
   "end_distance_m": 287.0,
   "start_elevation_m": 136.13592625926046,
   "end_elevation_m": 136.57427257505583,
   "min_gradient_pct": -7.02768717397575
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.625562479084692,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 284.0,
   "end_distance_m": 287.0,
   "start_elevation_m": 135.9255057006833,
   "end_elevation_m": 136.57427257505583,
   "min_gradient_pct": -6.788195651940043
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.103139234765536,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 275.0,
   "end_distance_m": 280.0,
   "start_elevation_m": 134.07068480881395,
   "end_elevation_m": 135.12584177055223,
   "min_gradient_pct": -6.425888367472794
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.868940923228934,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 270.0,
   "end_distance_m": 280.0,
   "start_elevation_m": 133.03894767822933,
   "end_elevation_m": 135.12584177055223,
   "min_gradient_pct": -5.2082975349559035
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.68198194098457,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 269.0,
   "end_distance_m": 289.0,
   "start_elevation_m": 132.8316895161627,
   "end_elevation_m": 136.9680859043596,
   "min_gradient_pct": -2.5188930605049364
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.437940038020088,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 268.0,
   "end_distance_m": 293.0,
   "start_elevation_m": 132.6357031456521,
   "end_elevation_m": 137.7451881551571,
   "min_gradient_pct": -1.7557318144744727
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.732971669894084,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 249.0,
   "end_distance_m": 299.0,
   "start_elevation_m": 129.00784014051166,
   "end_elevation_m": 138.8743259754587,
   "min_gradient_pct": 0.007139316884575919
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.129980754156406,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 249.0,
   "end_distance_m": 349.0,
   "start_elevation_m": 129.00784014051166,
   "end_elevation_m": 148.13782089466807,
   "min_gradient_pct": 0.8929528896884307
  }
 ],
 "shape": {
  "ascent_concentration": 0.477,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 213.0,
  "shape_class": "stepped"
 },
 "length_m": 543.2613421557245,
 "start_elevation_m": 116.91374849139171,
 "end_elevation_m": 169.53126185618305,
 "endpoint_gain_m": 52.617513364791336,
 "overall_gradient_pct": 9.685488232238079,
 "accumulated_ascent_m": 53.176811212478455,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.103139234765536,
   "start_distance_m": 275.0,
   "end_distance_m": 280.0,
   "midpoint_distance_m": 277.5,
   "start_elevation_m": 134.07068480881395,
   "end_elevation_m": 135.12584177055223,
   "start_xy": [
    562085.5790257577,
    4547358.179340442
   ],
   "end_xy": [
    562088.4931745317,
    4547354.116369002
   ]
  },
  "max_10m": {
   "gradient_pct": 20.868940923228934,
   "start_distance_m": 270.0,
   "end_distance_m": 280.0,
   "midpoint_distance_m": 275.0,
   "start_elevation_m": 133.03894767822933,
   "end_elevation_m": 135.12584177055223,
   "start_xy": [
    562082.6648769836,
    4547362.242311882
   ],
   "end_xy": [
    562088.4931745317,
    4547354.116369002
   ]
  },
  "max_20m": {
   "gradient_pct": 20.68198194098457,
   "start_distance_m": 269.0,
   "end_distance_m": 289.0,
   "midpoint_distance_m": 279.0,
   "start_elevation_m": 132.8316895161627,
   "end_elevation_m": 136.9680859043596,
   "start_xy": [
    562082.0820472288,
    4547363.05490617
   ],
   "end_xy": [
    562093.7668460271,
    4547346.824778204
   ]
  },
  "max_25m": {
   "gradient_pct": 20.437940038020088,
   "start_distance_m": 268.0,
   "end_distance_m": 293.0,
   "midpoint_distance_m": 280.5,
   "start_elevation_m": 132.6357031456521,
   "end_elevation_m": 137.7451881551571,
   "start_xy": [
    562081.499217474,
    4547363.867500458
   ],
   "end_xy": [
    562096.3190739066,
    4547343.744821573
   ]
  },
  "max_50m": {
   "gradient_pct": 19.732971669894084,
   "start_distance_m": 249.0,
   "end_distance_m": 299.0,
   "midpoint_distance_m": 274.0,
   "start_elevation_m": 129.00784014051166,
   "end_elevation_m": 138.8743259754587,
   "start_xy": [
    562070.4254521325,
    4547379.3067919295
   ],
   "end_xy": [
    562100.147415726,
    4547339.124886625
   ]
  },
  "max_100m": {
   "gradient_pct": 19.129980754156406,
   "start_distance_m": 249.0,
   "end_distance_m": 349.0,
   "midpoint_distance_m": 299.0,
   "start_elevation_m": 129.00784014051166,
   "end_elevation_m": 148.13782089466807,
   "start_xy": [
    562070.4254521325,
    4547379.3067919295
   ],
   "end_xy": [
    562130.821439429,
    4547299.670693485
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.425888367472794,
   "start_distance_m": 2.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 116.81717424471987,
   "end_elevation_m": 116.49587982634623,
   "start_xy": [
    562112.2728779255,
    4547595.867756864
   ],
   "end_xy": [
    562110.4750727394,
    4547591.202149025
   ]
  },
  "min_10m": {
   "gradient_pct": -5.2082975349559035,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 116.91374849139171,
   "end_elevation_m": 116.39291873789612,
   "start_xy": [
    562112.992,
    4547597.734
   ],
   "end_xy": [
    562109.3963896277,
    4547588.402784321
   ]
  },
  "min_20m": {
   "gradient_pct": -2.5188930605049364,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 116.91374849139171,
   "end_elevation_m": 116.40996987929073,
   "start_xy": [
    562112.992,
    4547597.734
   ],
   "end_xy": [
    562105.5921612483,
    4547579.15924109
   ]
  },
  "min_25m": {
   "gradient_pct": -1.7557318144744727,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 116.91374849139171,
   "end_elevation_m": 116.4748155377731,
   "start_xy": [
    562112.992,
    4547597.734
   ],
   "end_xy": [
    562103.5174037731,
    4547574.610023418
   ]
  },
  "min_50m": {
   "gradient_pct": 0.007139316884575919,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 116.91374849139171,
   "end_elevation_m": 116.917318149834,
   "start_xy": [
    562112.992,
    4547597.734
   ],
   "end_xy": [
    562092.5794382581,
    4547552.136334111
   ]
  },
  "min_100m": {
   "gradient_pct": 0.8929528896884307,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 116.91374849139171,
   "end_elevation_m": 117.80670138108015,
   "start_xy": [
    562112.992,
    4547597.734
   ],
   "end_xy": [
    562068.2769428011,
    4547508.455087538
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.917315789768566,
   "start_distance_m": 285.0,
   "end_distance_m": 287.0,
   "midpoint_distance_m": 286.0,
   "start_elevation_m": 136.13592625926046,
   "end_elevation_m": 136.57427257505583,
   "start_xy": [
    562091.4073233058,
    4547350.053397561
   ],
   "end_xy": [
    562092.5729828154,
    4547348.428208985
   ]
  },
  "max_3m": {
   "gradient_pct": 21.625562479084692,
   "start_distance_m": 284.0,
   "end_distance_m": 287.0,
   "midpoint_distance_m": 285.5,
   "start_elevation_m": 135.9255057006833,
   "end_elevation_m": 136.57427257505583,
   "start_xy": [
    562090.824493551,
    4547350.865991849
   ],
   "end_xy": [
    562092.5729828154,
    4547348.428208985
   ]
  }
 },
 "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": 0.061,
   "obstruction_max_height_m": 18.24,
   "flagged_windows_m": [
    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/nj/USGS_1M_18_x56y455_NJ_NW_New_Jersey_6_County_Lidar_2017_B17.tif"
  ],
  "calculated_at": "2026-09-06T01:50:32+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/new-jersey-2026-09-06.osm.pbf",
  "osm_snapshot": "2026-09-04T20:21:21Z",
  "run_id": "nj-run2-260906",
  "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, NJ_NW_New_Jersey_6_County_Lidar_2017_B17 (collected 2017)",
  "elevation_tile_ids": [
   "x56y455"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/NJ_NW6Co_2017",
   "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": "Ringwood",
  "county": "New Jersey"
 }
}