{
 "ocl_version": "0.1.0",
 "name": "Ivy Road",
 "slug": "ivy-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.96151206701711,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 245.0,
   "end_distance_m": 247.0,
   "start_elevation_m": 202.35958006146925,
   "end_elevation_m": 202.8588103028096,
   "min_gradient_pct": -14.167084826711118
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.61785311801255,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 244.0,
   "end_distance_m": 247.0,
   "start_elevation_m": 202.1202747092692,
   "end_elevation_m": 202.8588103028096,
   "min_gradient_pct": -11.456037627328897
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.004700960413743,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 242.0,
   "end_distance_m": 247.0,
   "start_elevation_m": 201.6585752547889,
   "end_elevation_m": 202.8588103028096,
   "min_gradient_pct": -8.005888848882137
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.629665482608345,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 239.0,
   "end_distance_m": 249.0,
   "start_elevation_m": 201.0346254215834,
   "end_elevation_m": 203.29759196984423,
   "min_gradient_pct": -3.975063856346708
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.80254538914403,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 238.0,
   "end_distance_m": 258.0,
   "start_elevation_m": 200.85344801239222,
   "end_elevation_m": 205.01395709022103,
   "min_gradient_pct": 1.260030216688648
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.377326770157765,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 235.0,
   "end_distance_m": 260.0,
   "start_elevation_m": 200.30282444142557,
   "end_elevation_m": 205.397156133965,
   "min_gradient_pct": 2.166115545604953
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.300322931308756,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 224.0,
   "end_distance_m": 274.0,
   "start_elevation_m": 198.7221078242574,
   "end_elevation_m": 207.87226928991177,
   "min_gradient_pct": 6.038404890082234
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.730098922865182,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 174.0,
   "end_distance_m": 274.0,
   "start_elevation_m": 192.1421703670466,
   "end_elevation_m": 207.87226928991177,
   "min_gradient_pct": 6.891985064292868
  }
 ],
 "shape": {
  "ascent_concentration": 0.374,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 120.0,
  "shape_class": "sustained"
 },
 "length_m": 457.06335169560305,
 "start_elevation_m": 174.87995350280147,
 "end_elevation_m": 220.37833104504574,
 "endpoint_gain_m": 45.49837754224427,
 "overall_gradient_pct": 9.9545013559839,
 "accumulated_ascent_m": 46.10518192983824,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.004700960413743,
   "start_distance_m": 242.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 244.5,
   "start_elevation_m": 201.6585752547889,
   "end_elevation_m": 202.8588103028096,
   "start_xy": [
    537324.7767107507,
    4558403.978808677
   ],
   "end_xy": [
    537328.949743183,
    4558401.224575514
   ]
  },
  "max_10m": {
   "gradient_pct": 22.629665482608345,
   "start_distance_m": 239.0,
   "end_distance_m": 249.0,
   "midpoint_distance_m": 244.0,
   "start_elevation_m": 201.0346254215834,
   "end_elevation_m": 203.29759196984423,
   "start_xy": [
    537322.2728912913,
    4558405.631348575
   ],
   "end_xy": [
    537330.6189561558,
    4558400.122882248
   ]
  },
  "max_20m": {
   "gradient_pct": 20.80254538914403,
   "start_distance_m": 238.0,
   "end_distance_m": 258.0,
   "midpoint_distance_m": 248.0,
   "start_elevation_m": 200.85344801239222,
   "end_elevation_m": 205.01395709022103,
   "start_xy": [
    537321.4382848049,
    4558406.182195208
   ],
   "end_xy": [
    537338.1304145339,
    4558395.165262554
   ]
  },
  "max_25m": {
   "gradient_pct": 20.377326770157765,
   "start_distance_m": 235.0,
   "end_distance_m": 260.0,
   "midpoint_distance_m": 247.5,
   "start_elevation_m": 200.30282444142557,
   "end_elevation_m": 205.397156133965,
   "start_xy": [
    537318.9344653456,
    4558407.834735106
   ],
   "end_xy": [
    537339.7996275069,
    4558394.063569289
   ]
  },
  "max_50m": {
   "gradient_pct": 18.300322931308756,
   "start_distance_m": 224.0,
   "end_distance_m": 274.0,
   "midpoint_distance_m": 249.0,
   "start_elevation_m": 198.7221078242574,
   "end_elevation_m": 207.87226928991177,
   "start_xy": [
    537309.7537939945,
    4558413.894048066
   ],
   "end_xy": [
    537351.4841183173,
    4558386.35171643
   ]
  },
  "max_100m": {
   "gradient_pct": 15.730098922865182,
   "start_distance_m": 174.0,
   "end_distance_m": 274.0,
   "midpoint_distance_m": 224.0,
   "start_elevation_m": 192.1421703670466,
   "end_elevation_m": 207.87226928991177,
   "start_xy": [
    537313.6707410214,
    4558457.855254541
   ],
   "end_xy": [
    537351.4841183173,
    4558386.35171643
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.005888848882137,
   "start_distance_m": 97.0,
   "end_distance_m": 102.0,
   "midpoint_distance_m": 99.5,
   "start_elevation_m": 184.83352938747714,
   "end_elevation_m": 184.43323494503304,
   "start_xy": [
    537332.0258324071,
    4558514.744907984
   ],
   "end_xy": [
    537336.3731710854,
    4558517.21485665
   ]
  },
  "min_10m": {
   "gradient_pct": -3.975063856346708,
   "start_distance_m": 97.0,
   "end_distance_m": 107.0,
   "midpoint_distance_m": 102.0,
   "start_elevation_m": 184.83352938747714,
   "end_elevation_m": 184.43602300184247,
   "start_xy": [
    537332.0258324071,
    4558514.744907984
   ],
   "end_xy": [
    537340.3770322072,
    4558519.302581669
   ]
  },
  "min_20m": {
   "gradient_pct": 1.260030216688648,
   "start_distance_m": 437.0,
   "end_distance_m": 457.0,
   "midpoint_distance_m": 447.0,
   "start_elevation_m": 220.13051030419737,
   "end_elevation_m": 220.3825163475351,
   "start_xy": [
    537466.7123926682,
    4558417.336602977
   ],
   "end_xy": [
    537480.5222560868,
    4558402.869824747
   ]
  },
  "min_25m": {
   "gradient_pct": 2.166115545604953,
   "start_distance_m": 432.0,
   "end_distance_m": 457.0,
   "midpoint_distance_m": 444.5,
   "start_elevation_m": 219.84098746113386,
   "end_elevation_m": 220.3825163475351,
   "start_xy": [
    537463.2599268135,
    4558420.953297534
   ],
   "end_xy": [
    537480.5222560868,
    4558402.869824747
   ]
  },
  "min_50m": {
   "gradient_pct": 6.038404890082234,
   "start_distance_m": 407.0,
   "end_distance_m": 457.0,
   "midpoint_distance_m": 432.0,
   "start_elevation_m": 217.36331390249399,
   "end_elevation_m": 220.3825163475351,
   "start_xy": [
    537445.9975975403,
    4558439.036770321
   ],
   "end_xy": [
    537480.5222560868,
    4558402.869824747
   ]
  },
  "min_100m": {
   "gradient_pct": 6.891985064292868,
   "start_distance_m": 277.0,
   "end_distance_m": 377.0,
   "midpoint_distance_m": 327.0,
   "start_elevation_m": 208.10802166845832,
   "end_elevation_m": 215.0000067327512,
   "start_xy": [
    537353.9879377766,
    4558384.699176532
   ],
   "end_xy": [
    537425.4044753104,
    4558451.429917086
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.96151206701711,
   "start_distance_m": 245.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 246.0,
   "start_elevation_m": 202.35958006146925,
   "end_elevation_m": 202.8588103028096,
   "start_xy": [
    537327.2805302101,
    4558402.326268779
   ],
   "end_xy": [
    537328.949743183,
    4558401.224575514
   ]
  },
  "max_3m": {
   "gradient_pct": 24.61785311801255,
   "start_distance_m": 244.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 245.5,
   "start_elevation_m": 202.1202747092692,
   "end_elevation_m": 202.8588103028096,
   "start_xy": [
    537326.4459237236,
    4558402.877115412
   ],
   "end_xy": [
    537328.949743183,
    4558401.224575514
   ]
  }
 },
 "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": 0.087,
   "obstruction_max_height_m": 31.85,
   "flagged_windows_m": [
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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_x53y456_NJ_NW_New_Jersey_6_County_Lidar_2017_B17.tif"
  ],
  "calculated_at": "2026-09-06T01:59:49+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": [
   "x53y456"
  ],
  "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": 1.0,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Vernon",
  "county": "New Jersey"
 }
}