{
 "ocl_version": "0.1.0",
 "name": "Gambel Road",
 "slug": "gambel-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.059995871172305,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 328.0,
   "end_distance_m": 330.0,
   "start_elevation_m": 528.8885971286073,
   "end_elevation_m": 529.6897970460308,
   "min_gradient_pct": -5.29010364041369
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 34.08335448879901,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 328.0,
   "end_distance_m": 331.0,
   "start_elevation_m": 528.8885971286073,
   "end_elevation_m": 529.9110977632713,
   "min_gradient_pct": -5.079667384742
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.301464684658185,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 328.0,
   "end_distance_m": 333.0,
   "start_elevation_m": 528.8885971286073,
   "end_elevation_m": 530.2536703628402,
   "min_gradient_pct": -3.618133845520788
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.878464712270898,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 325.0,
   "end_distance_m": 335.0,
   "start_elevation_m": 528.5138164381183,
   "end_elevation_m": 530.7016629093454,
   "min_gradient_pct": -0.29863265642802617
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.728151820556207,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 51.0,
   "end_distance_m": 71.0,
   "start_elevation_m": 496.0961435228334,
   "end_elevation_m": 500.24177388694466,
   "min_gradient_pct": 2.386813614976404
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.431964181877447,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 50.0,
   "end_distance_m": 75.0,
   "start_elevation_m": 495.93298230732853,
   "end_elevation_m": 501.0409733527979,
   "min_gradient_pct": 3.394932220492592
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.670624483685742,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 19.0,
   "end_distance_m": 69.0,
   "start_elevation_m": 490.0727811444516,
   "end_elevation_m": 499.90809338629447,
   "min_gradient_pct": 4.1546530581076695
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.760466901950394,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 13.0,
   "end_distance_m": 113.0,
   "start_elevation_m": 489.14693080552775,
   "end_elevation_m": 505.90739770747814,
   "min_gradient_pct": 8.033762157913998
  }
 ],
 "shape": {
  "ascent_concentration": 0.304,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 100.0,
  "shape_class": "sustained"
 },
 "length_m": 600.1999999999904,
 "start_elevation_m": 487.5308238748289,
 "end_elevation_m": 563.7656869066793,
 "endpoint_gain_m": 76.23486303185041,
 "overall_gradient_pct": 12.701576646426464,
 "accumulated_ascent_m": 76.65976123395467,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.301464684658185,
   "start_distance_m": 328.0,
   "end_distance_m": 333.0,
   "midpoint_distance_m": 330.5,
   "start_elevation_m": 528.8885971286073,
   "end_elevation_m": 530.2536703628402,
   "start_xy": [
    193829.29960279385,
    2161414.7530294843
   ],
   "end_xy": [
    193834.0046127405,
    2161416.4450330567
   ]
  },
  "max_10m": {
   "gradient_pct": 21.878464712270898,
   "start_distance_m": 325.0,
   "end_distance_m": 335.0,
   "midpoint_distance_m": 330.0,
   "start_elevation_m": 528.5138164381183,
   "end_elevation_m": 530.7016629093454,
   "start_xy": [
    193826.47682329858,
    2161413.7371977665
   ],
   "end_xy": [
    193835.88655300663,
    2161417.122011601
   ]
  },
  "max_20m": {
   "gradient_pct": 20.728151820556207,
   "start_distance_m": 51.0,
   "end_distance_m": 71.0,
   "midpoint_distance_m": 61.0,
   "start_elevation_m": 496.0961435228334,
   "end_elevation_m": 500.24177388694466,
   "start_xy": [
    193562.16348745106,
    2161351.1777506396
   ],
   "end_xy": [
    193582.0995065542,
    2161351.681355684
   ]
  },
  "max_25m": {
   "gradient_pct": 20.431964181877447,
   "start_distance_m": 50.0,
   "end_distance_m": 75.0,
   "midpoint_distance_m": 62.5,
   "start_elevation_m": 495.93298230732853,
   "end_elevation_m": 501.0409733527979,
   "start_xy": [
    193561.16399684682,
    2161351.209664101
   ],
   "end_xy": [
    193586.06673746326,
    2161352.1923121554
   ]
  },
  "max_50m": {
   "gradient_pct": 19.670624483685742,
   "start_distance_m": 19.0,
   "end_distance_m": 69.0,
   "midpoint_distance_m": 44.0,
   "start_elevation_m": 490.0727811444516,
   "end_elevation_m": 499.90809338629447,
   "start_xy": [
    193531.02223584612,
    2161344.5637516105
   ],
   "end_xy": [
    193580.1158243895,
    2161351.4263966954
   ]
  },
  "max_100m": {
   "gradient_pct": 16.760466901950394,
   "start_distance_m": 13.0,
   "end_distance_m": 113.0,
   "midpoint_distance_m": 63.0,
   "start_elevation_m": 489.14693080552775,
   "end_elevation_m": 505.90739770747814,
   "start_xy": [
    193525.02761463533,
    2161344.8177375705
   ],
   "end_xy": [
    193623.7523246723,
    2161357.0704146144
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.618133845520788,
   "start_distance_m": 196.0,
   "end_distance_m": 201.0,
   "midpoint_distance_m": 198.5,
   "start_elevation_m": 517.0050129166243,
   "end_elevation_m": 516.8241062243483,
   "start_xy": [
    193705.42018600475,
    2161370.992773859
   ],
   "end_xy": [
    193710.35190761613,
    2161371.7374384156
   ]
  },
  "min_10m": {
   "gradient_pct": -0.29863265642802617,
   "start_distance_m": 195.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 200.0,
   "start_elevation_m": 516.8991519083289,
   "end_elevation_m": 516.8692886426861,
   "start_xy": [
    193704.45463248887,
    2161370.732569375
   ],
   "end_xy": [
    193714.33371508017,
    2161372.1184981386
   ]
  },
  "min_20m": {
   "gradient_pct": 2.386813614976404,
   "start_distance_m": 195.0,
   "end_distance_m": 215.0,
   "midpoint_distance_m": 205.0,
   "start_elevation_m": 516.8991519083289,
   "end_elevation_m": 517.3765146313242,
   "start_xy": [
    193704.45463248887,
    2161370.732569375
   ],
   "end_xy": [
    193724.23141959962,
    2161373.32841978
   ]
  },
  "min_25m": {
   "gradient_pct": 3.394932220492592,
   "start_distance_m": 196.0,
   "end_distance_m": 221.0,
   "midpoint_distance_m": 208.5,
   "start_elevation_m": 517.0050129166243,
   "end_elevation_m": 517.8537459717475,
   "start_xy": [
    193705.42018600475,
    2161370.992773859
   ],
   "end_xy": [
    193729.7247999993,
    2161375.7414602614
   ]
  },
  "min_50m": {
   "gradient_pct": 4.1546530581076695,
   "start_distance_m": 195.0,
   "end_distance_m": 245.0,
   "midpoint_distance_m": 220.0,
   "start_elevation_m": 516.8991519083289,
   "end_elevation_m": 518.9764784373828,
   "start_xy": [
    193704.45463248887,
    2161370.732569375
   ],
   "end_xy": [
    193751.69882803614,
    2161385.392472566
   ]
  },
  "min_100m": {
   "gradient_pct": 8.033762157913998,
   "start_distance_m": 196.0,
   "end_distance_m": 296.0,
   "midpoint_distance_m": 246.0,
   "start_elevation_m": 517.0050129166243,
   "end_elevation_m": 525.0387750745383,
   "start_xy": [
    193705.42018600475,
    2161370.992773859
   ],
   "end_xy": [
    193799.53485784357,
    2161403.009089623
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.059995871172305,
   "start_distance_m": 328.0,
   "end_distance_m": 330.0,
   "midpoint_distance_m": 329.0,
   "start_elevation_m": 528.8885971286073,
   "end_elevation_m": 529.6897970460308,
   "start_xy": [
    193829.29960279385,
    2161414.7530294843
   ],
   "end_xy": [
    193831.18183324172,
    2161415.4292013487
   ]
  },
  "max_3m": {
   "gradient_pct": 34.08335448879901,
   "start_distance_m": 328.0,
   "end_distance_m": 331.0,
   "midpoint_distance_m": 329.5,
   "start_elevation_m": 528.8885971286073,
   "end_elevation_m": 529.9110977632713,
   "start_xy": [
    193829.29960279385,
    2161414.7530294843
   ],
   "end_xy": [
    193832.12267247436,
    2161415.7680545123
   ]
  }
 },
 "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": {
  "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:26905",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/hi-east/USGS_1M_5_x19y217_HI_Hawaii_Island_Lidar_NOAA_2017_B17.tif"
  ],
  "calculated_at": "2026-09-08T18:59:52+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-box-260908",
  "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_Hawaii_Island_Lidar_NOAA_2017_B17 (collected 2017)",
  "elevation_tile_ids": [
   "x19y217"
  ],
  "route_base_cut_m": 180.0,
  "route_cut_m": 600.2,
  "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": "South Kona",
  "county": "Hawaii"
 }
}