{
 "ocl_version": "0.1.0",
 "name": "Haleakala Highway",
 "slug": "haleakala-highway-4",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 16.671055125482326,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 381.0,
   "end_distance_m": 383.0,
   "start_elevation_m": 613.2225603899848,
   "end_elevation_m": 613.5559814924944,
   "min_gradient_pct": -4.677188930889997
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 16.31239065901961,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 381.0,
   "end_distance_m": 384.0,
   "start_elevation_m": 613.2225603899848,
   "end_elevation_m": 613.7119321097554,
   "min_gradient_pct": -4.101544621623058
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 15.685152715918775,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 380.0,
   "end_distance_m": 385.0,
   "start_elevation_m": 613.0764889138869,
   "end_elevation_m": 613.8607465496829,
   "min_gradient_pct": -3.7663480694959617
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 14.559342042083472,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 375.0,
   "end_distance_m": 385.0,
   "start_elevation_m": 612.4048123454745,
   "end_elevation_m": 613.8607465496829,
   "min_gradient_pct": -3.6930960680058433
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 13.504307739860906,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 366.0,
   "end_distance_m": 386.0,
   "start_elevation_m": 611.2827778296275,
   "end_elevation_m": 613.9836393775997,
   "min_gradient_pct": -3.4290445093978406
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 12.812413603858658,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 361.0,
   "end_distance_m": 386.0,
   "start_elevation_m": 610.7805359766351,
   "end_elevation_m": 613.9836393775997,
   "min_gradient_pct": -3.4259303599392297,
   "lateral_min_pct": 12.69,
   "lateral_max_pct": 13.0
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 10.322911400689009,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 337.0,
   "end_distance_m": 387.0,
   "start_elevation_m": 608.904839465451,
   "end_elevation_m": 614.0662951657955,
   "min_gradient_pct": -3.3624913204894256
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 8.157647165537924,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 350.0,
   "end_distance_m": 450.0,
   "start_elevation_m": 609.7874050310631,
   "end_elevation_m": 617.9450521966011,
   "min_gradient_pct": -3.037619045835072
  }
 ],
 "shape": {
  "ascent_concentration": 0.317,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 32.0,
  "shape_class": "sustained"
 },
 "length_m": 7116.374011054159,
 "start_elevation_m": 589.5752826004156,
 "end_elevation_m": 972.964971715753,
 "endpoint_gain_m": 383.38968911533743,
 "overall_gradient_pct": 5.387430291322552,
 "accumulated_ascent_m": 390.36982285185366,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 15.685152715918775,
   "start_distance_m": 380.0,
   "end_distance_m": 385.0,
   "midpoint_distance_m": 382.5,
   "start_elevation_m": 613.0764889138869,
   "end_elevation_m": 613.8607465496829,
   "start_xy": [
    779319.9412516939,
    2305485.376518266
   ],
   "end_xy": [
    779320.886408683,
    2305480.485533004
   ]
  },
  "max_10m": {
   "gradient_pct": 14.559342042083472,
   "start_distance_m": 375.0,
   "end_distance_m": 385.0,
   "midpoint_distance_m": 380.0,
   "start_elevation_m": 612.4048123454745,
   "end_elevation_m": 613.8607465496829,
   "start_xy": [
    779321.3218160047,
    2305490.182144363
   ],
   "end_xy": [
    779320.886408683,
    2305480.485533004
   ]
  },
  "max_20m": {
   "gradient_pct": 13.504307739860906,
   "start_distance_m": 366.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 376.0,
   "start_elevation_m": 611.2827778296275,
   "end_elevation_m": 613.9836393775997,
   "start_xy": [
    779323.2321452482,
    2305498.957674939
   ],
   "end_xy": [
    779321.0913226927,
    2305479.506753024
   ]
  },
  "max_25m": {
   "gradient_pct": 12.812413603858658,
   "start_distance_m": 361.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 373.5,
   "start_elevation_m": 610.7805359766351,
   "end_elevation_m": 613.9836393775997,
   "start_xy": [
    779323.6733440087,
    2305503.9331608303
   ],
   "end_xy": [
    779321.0913226927,
    2305479.506753024
   ]
  },
  "max_50m": {
   "gradient_pct": 10.322911400689009,
   "start_distance_m": 337.0,
   "end_distance_m": 387.0,
   "midpoint_distance_m": 362.0,
   "start_elevation_m": 608.904839465451,
   "end_elevation_m": 614.0662951657955,
   "start_xy": [
    779322.041059661,
    2305527.8376368354
   ],
   "end_xy": [
    779321.2962367024,
    2305478.5279730447
   ]
  },
  "max_100m": {
   "gradient_pct": 8.157647165537924,
   "start_distance_m": 350.0,
   "end_distance_m": 450.0,
   "midpoint_distance_m": 400.0,
   "start_elevation_m": 609.7874050310631,
   "end_elevation_m": 617.9450521966011,
   "start_xy": [
    779323.4609165627,
    2305514.9154076786
   ],
   "end_xy": [
    779347.8345025317,
    2305422.3131490997
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.7663480694959617,
   "start_distance_m": 2572.0,
   "end_distance_m": 2577.0,
   "midpoint_distance_m": 2574.5,
   "start_elevation_m": 756.6006372974156,
   "end_elevation_m": 756.4123198939408,
   "start_xy": [
    780401.1317877785,
    2304065.27353763
   ],
   "end_xy": [
    780399.662665509,
    2304060.494240636
   ]
  },
  "min_10m": {
   "gradient_pct": -3.6930960680058433,
   "start_distance_m": 2567.0,
   "end_distance_m": 2577.0,
   "midpoint_distance_m": 2572.0,
   "start_elevation_m": 756.7816295007414,
   "end_elevation_m": 756.4123198939408,
   "start_xy": [
    780402.6009100478,
    2304070.0528346244
   ],
   "end_xy": [
    780399.662665509,
    2304060.494240636
   ]
  },
  "min_20m": {
   "gradient_pct": -3.4290445093978406,
   "start_distance_m": 2561.0,
   "end_distance_m": 2581.0,
   "midpoint_distance_m": 2571.0,
   "start_elevation_m": 756.9903057375557,
   "end_elevation_m": 756.3044968356761,
   "start_xy": [
    780404.3638567709,
    2304075.787991017
   ],
   "end_xy": [
    780398.4873676936,
    2304056.6708030407
   ]
  },
  "min_25m": {
   "gradient_pct": -3.4259303599392297,
   "start_distance_m": 2561.0,
   "end_distance_m": 2586.0,
   "midpoint_distance_m": 2573.5,
   "start_elevation_m": 756.9903057375557,
   "end_elevation_m": 756.1338231475709,
   "start_xy": [
    780404.3638567709,
    2304075.787991017
   ],
   "end_xy": [
    780397.0182454243,
    2304051.891506047
   ]
  },
  "min_50m": {
   "gradient_pct": -3.3624913204894256,
   "start_distance_m": 2561.0,
   "end_distance_m": 2611.0,
   "midpoint_distance_m": 2586.0,
   "start_elevation_m": 756.9903057375557,
   "end_elevation_m": 755.309060077311,
   "start_xy": [
    780404.3638567709,
    2304075.787991017
   ],
   "end_xy": [
    780389.4309261286,
    2304028.080076271
   ]
  },
  "min_100m": {
   "gradient_pct": -3.037619045835072,
   "start_distance_m": 2542.0,
   "end_distance_m": 2642.0,
   "midpoint_distance_m": 2592.0,
   "start_elevation_m": 757.4842564278076,
   "end_elevation_m": 754.4466373819726,
   "start_xy": [
    780409.9465213944,
    2304093.949319595
   ],
   "end_xy": [
    780374.9378237666,
    2304000.7810664214
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 16.671055125482326,
   "start_distance_m": 381.0,
   "end_distance_m": 383.0,
   "midpoint_distance_m": 382.0,
   "start_elevation_m": 613.2225603899848,
   "end_elevation_m": 613.5559814924944,
   "start_xy": [
    779320.0667526444,
    2305484.4006529227
   ],
   "end_xy": [
    779320.4765806637,
    2305482.4430929637
   ]
  },
  "max_3m": {
   "gradient_pct": 16.31239065901961,
   "start_distance_m": 381.0,
   "end_distance_m": 384.0,
   "midpoint_distance_m": 382.5,
   "start_elevation_m": 613.2225603899848,
   "end_elevation_m": 613.7119321097554,
   "start_xy": [
    779320.0667526444,
    2305484.4006529227
   ],
   "end_xy": [
    779320.6814946734,
    2305481.4643129837
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.006,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    4768.0,
    4808.0
   ]
  ],
  "review": [],
  "extent": [],
  "lateral_stability": {
   "offsets_m": [
    -1.0,
    -0.5,
    0.0,
    0.5,
    1.0
   ],
   "windows": [
    {
     "window_m": 25,
     "min_pct": 12.69,
     "max_pct": 13.0
    },
    {
     "window_m": 10,
     "min_pct": 13.81,
     "max_pct": 16.04
    },
    {
     "window_m": 5,
     "min_pct": 14.86,
     "max_pct": 17.29
    }
   ]
  }
 },
 "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:26904",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/hi/USGS_1M_4_x77y231_HI_NOAAMauiOahu_2020_B20.tif",
   "data/cache/usa/hi/USGS_1M_4_x78y231_HI_NOAAMauiOahu_2020_B20.tif"
  ],
  "calculated_at": "2026-09-09T01:53:20+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/hawaii-2026-09-08-batch.osm.pbf",
  "osm_snapshot": "2026-09-07T20:21:20Z",
  "run_id": "retro-box2-260909",
  "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, HI_NOAAMauiOahu_2020_B20 (collected 2020)",
  "elevation_tile_ids": [
   "x77y231",
   "x78y231"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Makawao-Paia",
  "county": "Hawaii"
 }
}