{
 "ocl_version": "0.1.0",
 "name": "Old Indian Spring Road",
 "slug": "old-indian-spring-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.535524396669416,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 853.0,
   "end_distance_m": 855.0,
   "start_elevation_m": 322.979448339983,
   "end_elevation_m": 323.45015882791637,
   "min_gradient_pct": -26.123094290977633
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.47139802780301,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 853.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 322.979448339983,
   "end_elevation_m": 323.65359028081707,
   "min_gradient_pct": -25.631418866068618
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.77148454894109,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 850.0,
   "end_distance_m": 855.0,
   "start_elevation_m": 322.3615846004693,
   "end_elevation_m": 323.45015882791637,
   "min_gradient_pct": -24.977372558254274
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.285392769650002,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 846.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 321.52505100385207,
   "end_elevation_m": 323.65359028081707,
   "min_gradient_pct": -22.84288582356737
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.787515059978432,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 836.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 319.4960872688214,
   "end_elevation_m": 323.65359028081707,
   "min_gradient_pct": -18.303583731578215
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.58064852555276,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 831.0,
   "end_distance_m": 856.0,
   "start_elevation_m": 318.5084281494289,
   "end_elevation_m": 323.65359028081707,
   "min_gradient_pct": -16.19490944432323
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.392285802234596,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 811.0,
   "end_distance_m": 861.0,
   "start_elevation_m": 315.3522275587229,
   "end_elevation_m": 324.5483704598402,
   "min_gradient_pct": -10.21831247850821
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.708127483697922,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 760.0,
   "end_distance_m": 860.0,
   "start_elevation_m": 307.6914237223515,
   "end_elevation_m": 324.3995512060494,
   "min_gradient_pct": -7.419476453133996
  }
 ],
 "shape": {
  "ascent_concentration": 0.452,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 169.0,
  "shape_class": "stepped"
 },
 "length_m": 1158.9776612084233,
 "start_elevation_m": 255.25952326202906,
 "end_elevation_m": 327.94134901178046,
 "endpoint_gain_m": 72.6818257497514,
 "overall_gradient_pct": 6.271201610043867,
 "accumulated_ascent_m": 82.09048452208478,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.77148454894109,
   "start_distance_m": 850.0,
   "end_distance_m": 855.0,
   "midpoint_distance_m": 852.5,
   "start_elevation_m": 322.3615846004693,
   "end_elevation_m": 323.45015882791637,
   "start_xy": [
    523551.55835228635,
    4533857.507637165
   ],
   "end_xy": [
    523549.71039815765,
    4533852.861664119
   ]
  },
  "max_10m": {
   "gradient_pct": 21.285392769650002,
   "start_distance_m": 846.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 851.0,
   "start_elevation_m": 321.52505100385207,
   "end_elevation_m": 323.65359028081707,
   "start_xy": [
    523553.03671558923,
    4533861.2244156
   ],
   "end_xy": [
    523549.34080733196,
    4533851.93246951
   ]
  },
  "max_20m": {
   "gradient_pct": 20.787515059978432,
   "start_distance_m": 836.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 846.0,
   "start_elevation_m": 319.4960872688214,
   "end_elevation_m": 323.65359028081707,
   "start_xy": [
    523553.8347761986,
    4533871.1805271655
   ],
   "end_xy": [
    523549.34080733196,
    4533851.93246951
   ]
  },
  "max_25m": {
   "gradient_pct": 20.58064852555276,
   "start_distance_m": 831.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 843.5,
   "start_elevation_m": 318.5084281494289,
   "end_elevation_m": 323.65359028081707,
   "start_xy": [
    523554.1946366132,
    4533876.1675603995
   ],
   "end_xy": [
    523549.34080733196,
    4533851.93246951
   ]
  },
  "max_50m": {
   "gradient_pct": 18.392285802234596,
   "start_distance_m": 811.0,
   "end_distance_m": 861.0,
   "midpoint_distance_m": 836.0,
   "start_elevation_m": 315.3522275587229,
   "end_elevation_m": 324.5483704598402,
   "start_xy": [
    523553.9205076865,
    4533896.1511735795
   ],
   "end_xy": [
    523547.49285320326,
    4533847.286496464
   ]
  },
  "max_100m": {
   "gradient_pct": 16.708127483697922,
   "start_distance_m": 760.0,
   "end_distance_m": 860.0,
   "midpoint_distance_m": 810.0,
   "start_elevation_m": 307.6914237223515,
   "end_elevation_m": 324.3995512060494,
   "start_xy": [
    523546.9076678277,
    4533946.497342289
   ],
   "end_xy": [
    523547.862444029,
    4533848.215691074
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -24.977372558254274,
   "start_distance_m": 1065.0,
   "end_distance_m": 1070.0,
   "midpoint_distance_m": 1067.5,
   "start_elevation_m": 326.35942530560226,
   "end_elevation_m": 325.11055667768954,
   "start_xy": [
    523558.4275455767,
    4533651.471652866
   ],
   "end_xy": [
    523558.6147107248,
    4533646.475157173
   ]
  },
  "min_10m": {
   "gradient_pct": -22.84288582356737,
   "start_distance_m": 1065.0,
   "end_distance_m": 1075.0,
   "midpoint_distance_m": 1070.0,
   "start_elevation_m": 326.35942530560226,
   "end_elevation_m": 324.0751367232455,
   "start_xy": [
    523558.4275455767,
    4533651.471652866
   ],
   "end_xy": [
    523558.8018758729,
    4533641.47866148
   ]
  },
  "min_20m": {
   "gradient_pct": -18.303583731578215,
   "start_distance_m": 1061.0,
   "end_distance_m": 1081.0,
   "midpoint_distance_m": 1071.0,
   "start_elevation_m": 326.87605894180484,
   "end_elevation_m": 323.2153421954892,
   "start_xy": [
    523557.9722479153,
    4533655.396195099
   ],
   "end_xy": [
    523559.4056041207,
    4533635.509803233
   ]
  },
  "min_25m": {
   "gradient_pct": -16.19490944432323,
   "start_distance_m": 1057.0,
   "end_distance_m": 1082.0,
   "midpoint_distance_m": 1069.5,
   "start_elevation_m": 327.1926207725828,
   "end_elevation_m": 323.143893411502,
   "start_xy": [
    523556.3068411504,
    4533659.033009681
   ],
   "end_xy": [
    523559.5098311287,
    4533634.515249699
   ]
  },
  "min_50m": {
   "gradient_pct": -10.21831247850821,
   "start_distance_m": 1034.0,
   "end_distance_m": 1084.0,
   "midpoint_distance_m": 1059.0,
   "start_elevation_m": 328.12552909510066,
   "end_elevation_m": 323.01637285584656,
   "start_xy": [
    523546.7307522521,
    4533679.944693531
   ],
   "end_xy": [
    523559.7182851447,
    4533632.526142633
   ]
  },
  "min_100m": {
   "gradient_pct": -7.419476453133996,
   "start_distance_m": 984.0,
   "end_distance_m": 1084.0,
   "midpoint_distance_m": 1034.0,
   "start_elevation_m": 330.43584930898055,
   "end_elevation_m": 323.01637285584656,
   "start_xy": [
    523535.0548906874,
    4533728.069708279
   ],
   "end_xy": [
    523559.7182851447,
    4533632.526142633
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.535524396669416,
   "start_distance_m": 853.0,
   "end_distance_m": 855.0,
   "midpoint_distance_m": 854.0,
   "start_elevation_m": 322.979448339983,
   "end_elevation_m": 323.45015882791637,
   "start_xy": [
    523550.44957980915,
    4533854.720053337
   ],
   "end_xy": [
    523549.71039815765,
    4533852.861664119
   ]
  },
  "max_3m": {
   "gradient_pct": 22.47139802780301,
   "start_distance_m": 853.0,
   "end_distance_m": 856.0,
   "midpoint_distance_m": 854.5,
   "start_elevation_m": 322.979448339983,
   "end_elevation_m": 323.65359028081707,
   "start_xy": [
    523550.44957980915,
    4533854.720053337
   ],
   "end_xy": [
    523549.34080733196,
    4533851.93246951
   ]
  }
 },
 "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": 0.169,
   "obstruction_max_height_m": 24.89,
   "flagged_windows_m": [
    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/nj/USGS_1M_18_x52y454_NJ_NW_New_Jersey_6_County_Lidar_2017_B17.tif"
  ],
  "calculated_at": "2026-09-06T01:51:48+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": [
   "x52y454"
  ],
  "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": 0.997,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Byram",
  "county": "New Jersey"
 }
}