{
 "ocl_version": "0.1.0",
 "name": "Old Swartswood Station Road",
 "slug": "old-swartswood-station-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 31.54487997177995,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1066.0,
   "end_distance_m": 1068.0,
   "start_elevation_m": 180.75500545438945,
   "end_elevation_m": 181.38590305382505,
   "min_gradient_pct": -24.50029772765845
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.085425981291337,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1066.0,
   "end_distance_m": 1069.0,
   "start_elevation_m": 180.75500545438945,
   "end_elevation_m": 181.6875682338282,
   "min_gradient_pct": -23.158605629553602
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.91304988301522,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1065.0,
   "end_distance_m": 1070.0,
   "start_elevation_m": 180.47070264467587,
   "end_elevation_m": 181.96635513882663,
   "min_gradient_pct": -21.946977853380645
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.16073351134696,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1064.0,
   "end_distance_m": 1074.0,
   "start_elevation_m": 180.22513240128148,
   "end_elevation_m": 182.94120575241618,
   "min_gradient_pct": -13.655650392606162
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.46996932879648,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1059.0,
   "end_distance_m": 1079.0,
   "start_elevation_m": 179.28846170049655,
   "end_elevation_m": 183.98245556625585,
   "min_gradient_pct": -13.23959934267208
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.36122821423828,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1048.0,
   "end_distance_m": 1073.0,
   "start_elevation_m": 177.38463495745856,
   "end_elevation_m": 182.72494201101813,
   "min_gradient_pct": -12.66911043870175
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.52664445073799,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1029.0,
   "end_distance_m": 1079.0,
   "start_elevation_m": 175.71913334088686,
   "end_elevation_m": 183.98245556625585,
   "min_gradient_pct": -10.365753492457543
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 9.628666658387829,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 113.0,
   "end_distance_m": 213.0,
   "start_elevation_m": 173.31476916413197,
   "end_elevation_m": 182.9434358225198,
   "min_gradient_pct": -7.132748044329105
  }
 ],
 "shape": {
  "ascent_concentration": 0.545,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 46.0,
  "shape_class": "stepped"
 },
 "length_m": 1142.3415696150983,
 "start_elevation_m": 165.232788847131,
 "end_elevation_m": 185.30419207812005,
 "endpoint_gain_m": 20.071403230989063,
 "overall_gradient_pct": 1.7570404303637432,
 "accumulated_ascent_m": 40.97836630356724,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.91304988301522,
   "start_distance_m": 1065.0,
   "end_distance_m": 1070.0,
   "midpoint_distance_m": 1067.5,
   "start_elevation_m": 180.47070264467587,
   "end_elevation_m": 181.96635513882663,
   "start_xy": [
    516018.8611124638,
    4545090.168202651
   ],
   "end_xy": [
    516016.07136256964,
    4545094.317575559
   ]
  },
  "max_10m": {
   "gradient_pct": 27.16073351134696,
   "start_distance_m": 1064.0,
   "end_distance_m": 1074.0,
   "midpoint_distance_m": 1069.0,
   "start_elevation_m": 180.22513240128148,
   "end_elevation_m": 182.94120575241618,
   "start_xy": [
    516019.4190624426,
    4545089.338328069
   ],
   "end_xy": [
    516013.83956265426,
    4545097.637073885
   ]
  },
  "max_20m": {
   "gradient_pct": 23.46996932879648,
   "start_distance_m": 1059.0,
   "end_distance_m": 1079.0,
   "midpoint_distance_m": 1069.0,
   "start_elevation_m": 179.28846170049655,
   "end_elevation_m": 183.98245556625585,
   "start_xy": [
    516022.2088123368,
    4545085.188955162
   ],
   "end_xy": [
    516011.6981127738,
    4545102.112332062
   ]
  },
  "max_25m": {
   "gradient_pct": 21.36122821423828,
   "start_distance_m": 1048.0,
   "end_distance_m": 1073.0,
   "midpoint_distance_m": 1060.5,
   "start_elevation_m": 177.38463495745856,
   "end_elevation_m": 182.72494201101813,
   "start_xy": [
    516028.1989743911,
    4545075.964734939
   ],
   "end_xy": [
    516014.3975126331,
    4545096.807199303
   ]
  },
  "max_50m": {
   "gradient_pct": 16.52664445073799,
   "start_distance_m": 1029.0,
   "end_distance_m": 1079.0,
   "midpoint_distance_m": 1054.0,
   "start_elevation_m": 175.71913334088686,
   "end_elevation_m": 183.98245556625585,
   "start_xy": [
    516038.28088571224,
    4545059.860230472
   ],
   "end_xy": [
    516011.6981127738,
    4545102.112332062
   ]
  },
  "max_100m": {
   "gradient_pct": 9.628666658387829,
   "start_distance_m": 113.0,
   "end_distance_m": 213.0,
   "midpoint_distance_m": 163.0,
   "start_elevation_m": 173.31476916413197,
   "end_elevation_m": 182.9434358225198,
   "start_xy": [
    515610.2289679381,
    4544322.0805287175
   ],
   "end_xy": [
    515678.05890780076,
    4544394.621872773
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -21.946977853380645,
   "start_distance_m": 43.0,
   "end_distance_m": 48.0,
   "midpoint_distance_m": 45.5,
   "start_elevation_m": 170.3180632325149,
   "end_elevation_m": 169.22071433984587,
   "start_xy": [
    515543.1789818801,
    4544308.037084179
   ],
   "end_xy": [
    515548.1698814749,
    4544308.3386156615
   ]
  },
  "min_10m": {
   "gradient_pct": -13.655650392606162,
   "start_distance_m": 368.0,
   "end_distance_m": 378.0,
   "midpoint_distance_m": 373.0,
   "start_elevation_m": 186.57074805237718,
   "end_elevation_m": 185.20518301311657,
   "start_xy": [
    515770.69493460294,
    4544518.556243278
   ],
   "end_xy": [
    515775.7629381193,
    4544527.176877847
   ]
  },
  "min_20m": {
   "gradient_pct": -13.23959934267208,
   "start_distance_m": 370.0,
   "end_distance_m": 390.0,
   "midpoint_distance_m": 380.0,
   "start_elevation_m": 186.3326033013044,
   "end_elevation_m": 183.68468343277,
   "start_xy": [
    515771.7085353062,
    4544520.280370192
   ],
   "end_xy": [
    515781.8421973755,
    4544537.5230174465
   ]
  },
  "min_25m": {
   "gradient_pct": -12.66911043870175,
   "start_distance_m": 366.0,
   "end_distance_m": 391.0,
   "midpoint_distance_m": 378.5,
   "start_elevation_m": 186.76444061630227,
   "end_elevation_m": 183.59716300662683,
   "start_xy": [
    515769.6813338996,
    4544516.8321163645
   ],
   "end_xy": [
    515782.3487423457,
    4544538.385230989
   ]
  },
  "min_50m": {
   "gradient_pct": -10.365753492457543,
   "start_distance_m": 356.0,
   "end_distance_m": 406.0,
   "midpoint_distance_m": 381.0,
   "start_elevation_m": 187.51669172372345,
   "end_elevation_m": 182.33381497749468,
   "start_xy": [
    515764.4661928945,
    4544508.304383081
   ],
   "end_xy": [
    515789.9469168988,
    4544551.3184341295
   ]
  },
  "min_100m": {
   "gradient_pct": -7.132748044329105,
   "start_distance_m": 346.0,
   "end_distance_m": 446.0,
   "midpoint_distance_m": 396.0,
   "start_elevation_m": 187.84144728641223,
   "end_elevation_m": 180.70869924208313,
   "start_xy": [
    515758.8619776844,
    4544500.022307744
   ],
   "end_xy": [
    515810.208715707,
    4544585.806975836
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 31.54487997177995,
   "start_distance_m": 1066.0,
   "end_distance_m": 1068.0,
   "midpoint_distance_m": 1067.0,
   "start_elevation_m": 180.75500545438945,
   "end_elevation_m": 181.38590305382505,
   "start_xy": [
    516018.30316248495,
    4545090.998077232
   ],
   "end_xy": [
    516017.1872625273,
    4545092.657826396
   ]
  },
  "max_3m": {
   "gradient_pct": 31.085425981291337,
   "start_distance_m": 1066.0,
   "end_distance_m": 1069.0,
   "midpoint_distance_m": 1067.5,
   "start_elevation_m": 180.75500545438945,
   "end_elevation_m": 181.6875682338282,
   "start_xy": [
    516018.30316248495,
    4545090.998077232
   ],
   "end_xy": [
    516016.62931254844,
    4545093.487700977
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.062,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.572,
   "obstruction_max_height_m": 26.96,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    610.0,
    680.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "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/nj/USGS_1M_18_x51y455_NJ_NW_New_Jersey_6_County_Lidar_2017_B17.tif"
  ],
  "calculated_at": "2026-09-06T02:14:30+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": [
   "x51y455"
  ],
  "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": 0.998,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Fredon",
  "county": "New Jersey"
 }
}