{
 "ocl_version": "0.1.0",
 "name": "Arthur's Pass from Jacksons",
 "slug": "arthur-s-pass-from-jacksons",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.17965308166538,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded_min"
   ],
   "start_distance_m": 13575.0,
   "end_distance_m": 13577.0,
   "start_elevation_m": 354.3036410477978,
   "end_elevation_m": 355.1072341094311,
   "min_gradient_pct": -36.00528943566985,
   "suppressed_max_gradient_pct": 310.18813911371694,
   "suppressed_location_m": [
    21307.0,
    21309.0
   ],
   "suppressed_min_gradient_pct": -380.66656030310924,
   "suppressed_min_location_m": [
    21363.0,
    21365.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.961743073464657,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded_min"
   ],
   "start_distance_m": 13574.0,
   "end_distance_m": 13577.0,
   "start_elevation_m": 354.23838181722715,
   "end_elevation_m": 355.1072341094311,
   "min_gradient_pct": -29.2439692680811,
   "suppressed_max_gradient_pct": 308.5532155631806,
   "suppressed_location_m": [
    21306.0,
    21309.0
   ],
   "suppressed_min_gradient_pct": -319.00959543373045,
   "suppressed_min_location_m": [
    21363.0,
    21366.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.619244539868305,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 8565.0,
   "end_distance_m": 8570.0,
   "start_elevation_m": 293.2362676161399,
   "end_elevation_m": 294.4172298431333,
   "min_gradient_pct": -23.03808181877116,
   "suppressed_max_gradient_pct": 272.83907875704926,
   "suppressed_location_m": [
    21305.0,
    21310.0
   ],
   "suppressed_min_gradient_pct": -203.1976942383153,
   "suppressed_min_location_m": [
    21361.0,
    21366.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 17.92906593212365,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded",
    "no_bench_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 8564.0,
   "end_distance_m": 8574.0,
   "start_elevation_m": 293.1894009926671,
   "end_elevation_m": 294.9823075858795,
   "min_gradient_pct": -16.06751719433987,
   "suppressed_max_gradient_pct": 149.07388833891673,
   "suppressed_location_m": [
    21302.0,
    21312.0
   ],
   "suppressed_min_gradient_pct": -95.44244381706903,
   "suppressed_min_location_m": [
    21357.0,
    21367.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 17.38137615541234,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded_min"
   ],
   "start_distance_m": 21910.0,
   "end_distance_m": 21930.0,
   "start_elevation_m": 705.9144441162828,
   "end_elevation_m": 709.3907193473652,
   "min_gradient_pct": -7.757280725382145,
   "suppressed_max_gradient_pct": 104.63640556839607,
   "suppressed_location_m": [
    22546.0,
    22566.0
   ],
   "suppressed_min_gradient_pct": -50.89174228099523,
   "suppressed_min_location_m": [
    20424.0,
    20444.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 17.342655759013724,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded_min"
   ],
   "start_distance_m": 21904.0,
   "end_distance_m": 21929.0,
   "start_elevation_m": 704.8789346889221,
   "end_elevation_m": 709.2145986286755,
   "min_gradient_pct": -6.093307843204002,
   "suppressed_max_gradient_pct": 93.44218018210495,
   "suppressed_location_m": [
    22542.0,
    22567.0
   ],
   "suppressed_min_gradient_pct": -40.33484979840705,
   "suppressed_min_location_m": [
    20424.0,
    20449.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.271161085036965,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded_min"
   ],
   "start_distance_m": 21880.0,
   "end_distance_m": 21930.0,
   "start_elevation_m": 700.7551388048468,
   "end_elevation_m": 709.3907193473652,
   "min_gradient_pct": -5.5977763321957354,
   "suppressed_max_gradient_pct": 59.384821192058325,
   "suppressed_location_m": [
    22540.0,
    22590.0
   ],
   "suppressed_min_gradient_pct": -21.09582548721437,
   "suppressed_min_location_m": [
    22215.0,
    22265.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.606746537680806,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 21868.0,
   "end_distance_m": 21968.0,
   "start_elevation_m": 698.8160988564332,
   "end_elevation_m": 715.422845394114,
   "min_gradient_pct": -5.527954517612557,
   "suppressed_max_gradient_pct": 36.86118093797825,
   "suppressed_location_m": [
    22528.0,
    22628.0
   ],
   "suppressed_min_gradient_pct": -18.702176496856282,
   "suppressed_min_location_m": [
    22165.0,
    22265.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.619,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 516.0,
  "shape_class": "stepped"
 },
 "length_m": 24895.523771552154,
 "start_elevation_m": 201.2794046171926,
 "end_elevation_m": 918.2143563759716,
 "endpoint_gain_m": 716.9349517587791,
 "overall_gradient_pct": 2.8797745262865804,
 "accumulated_ascent_m": 922.3052357912485,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.619244539868305,
   "start_distance_m": 8565.0,
   "end_distance_m": 8570.0,
   "midpoint_distance_m": 8567.5,
   "start_elevation_m": 293.2362676161399,
   "end_elevation_m": 294.4172298431333,
   "start_xy": [
    1486153.6275198075,
    5262352.656365196
   ],
   "end_xy": [
    1486150.0301324101,
    5262349.18378634
   ]
  },
  "max_10m": {
   "gradient_pct": 17.92906593212365,
   "start_distance_m": 8564.0,
   "end_distance_m": 8574.0,
   "midpoint_distance_m": 8569.0,
   "start_elevation_m": 293.1894009926671,
   "end_elevation_m": 294.9823075858795,
   "start_xy": [
    1486154.346997287,
    5262353.350880967
   ],
   "end_xy": [
    1486147.152222492,
    5262346.405723255
   ]
  },
  "max_20m": {
   "gradient_pct": 17.38137615541234,
   "start_distance_m": 21910.0,
   "end_distance_m": 21930.0,
   "midpoint_distance_m": 21920.0,
   "start_elevation_m": 705.9144441162828,
   "end_elevation_m": 709.3907193473652,
   "start_xy": [
    1481985.0055971483,
    5251252.979214573
   ],
   "end_xy": [
    1481993.758907265,
    5251235.019612716
   ]
  },
  "max_25m": {
   "gradient_pct": 17.342655759013724,
   "start_distance_m": 21904.0,
   "end_distance_m": 21929.0,
   "midpoint_distance_m": 21916.5,
   "start_elevation_m": 704.8789346889221,
   "end_elevation_m": 709.2145986286755,
   "start_xy": [
    1481982.8749611797,
    5251258.577946678
   ],
   "end_xy": [
    1481993.1864272594,
    5251235.8395313965
   ]
  },
  "max_50m": {
   "gradient_pct": 17.271161085036965,
   "start_distance_m": 21880.0,
   "end_distance_m": 21930.0,
   "midpoint_distance_m": 21905.0,
   "start_elevation_m": 700.7551388048468,
   "end_elevation_m": 709.3907193473652,
   "start_xy": [
    1481979.0716271298,
    5251282.141762581
   ],
   "end_xy": [
    1481993.758907265,
    5251235.019612716
   ]
  },
  "max_100m": {
   "gradient_pct": 16.606746537680806,
   "start_distance_m": 21868.0,
   "end_distance_m": 21968.0,
   "midpoint_distance_m": 21918.0,
   "start_elevation_m": 698.8160988564332,
   "end_elevation_m": 715.422845394114,
   "start_xy": [
    1481979.8212553186,
    5251294.090083074
   ],
   "end_xy": [
    1482017.2754086151,
    5251205.20227233
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -23.03808181877116,
   "start_distance_m": 8577.0,
   "end_distance_m": 8582.0,
   "midpoint_distance_m": 8579.5,
   "start_elevation_m": 294.56542012734474,
   "end_elevation_m": 293.4135160364062,
   "start_xy": [
    1486144.9937900535,
    5262344.3221759405
   ],
   "end_xy": [
    1486141.396402656,
    5262340.849597084
   ]
  },
  "min_10m": {
   "gradient_pct": -16.06751719433987,
   "start_distance_m": 8574.0,
   "end_distance_m": 8584.0,
   "midpoint_distance_m": 8579.0,
   "start_elevation_m": 294.9823075858795,
   "end_elevation_m": 293.3755558664455,
   "start_xy": [
    1486147.152222492,
    5262346.405723255
   ],
   "end_xy": [
    1486139.9574476972,
    5262339.460565542
   ]
  },
  "min_20m": {
   "gradient_pct": -7.757280725382145,
   "start_distance_m": 8574.0,
   "end_distance_m": 8594.0,
   "midpoint_distance_m": 8584.0,
   "start_elevation_m": 294.9823075858795,
   "end_elevation_m": 293.43085144080305,
   "start_xy": [
    1486147.152222492,
    5262346.405723255
   ],
   "end_xy": [
    1486132.762672902,
    5262332.51540783
   ]
  },
  "min_25m": {
   "gradient_pct": -6.093307843204002,
   "start_distance_m": 8574.0,
   "end_distance_m": 8599.0,
   "midpoint_distance_m": 8586.5,
   "start_elevation_m": 294.9823075858795,
   "end_elevation_m": 293.4589806250785,
   "start_xy": [
    1486147.152222492,
    5262346.405723255
   ],
   "end_xy": [
    1486129.1652855047,
    5262329.042828973
   ]
  },
  "min_50m": {
   "gradient_pct": -5.5977763321957354,
   "start_distance_m": 10974.0,
   "end_distance_m": 11024.0,
   "midpoint_distance_m": 10999.0,
   "start_elevation_m": 332.9673550808477,
   "end_elevation_m": 330.16846691474984,
   "start_xy": [
    1484291.984172895,
    5260910.448059935
   ],
   "end_xy": [
    1484242.1674703253,
    5260906.401871323
   ]
  },
  "min_100m": {
   "gradient_pct": -5.527954517612557,
   "start_distance_m": 10933.0,
   "end_distance_m": 11033.0,
   "midpoint_distance_m": 10983.0,
   "start_elevation_m": 335.2096218091848,
   "end_elevation_m": 329.68166729157224,
   "start_xy": [
    1484332.9564664937,
    5260911.916824954
   ],
   "end_xy": [
    1484233.2602903808,
    5260905.195690081
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.17965308166538,
   "start_distance_m": 13575.0,
   "end_distance_m": 13577.0,
   "midpoint_distance_m": 13576.0,
   "start_elevation_m": 354.3036410477978,
   "end_elevation_m": 355.1072341094311,
   "start_xy": [
    1482722.3540899924,
    5258981.207959313
   ],
   "end_xy": [
    1482721.9635323905,
    5258979.246463771
   ]
  },
  "max_3m": {
   "gradient_pct": 28.961743073464657,
   "start_distance_m": 13574.0,
   "end_distance_m": 13577.0,
   "midpoint_distance_m": 13575.5,
   "start_elevation_m": 354.23838181722715,
   "end_elevation_m": 355.1072341094311,
   "start_xy": [
    1482722.5493687931,
    5258982.188707083
   ],
   "end_xy": [
    1482721.9635323905,
    5258979.246463771
   ]
  }
 },
 "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": 0.057,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "minima_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.06,
   "windows_resited": [
    10.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "minima_unresolved": []
  },
  "placement_suppression": {
   "masked_fraction": 0.06,
   "windows_resited": [],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.061,
   "obstruction_max_height_m": 43.21,
   "flagged_windows_m": [
    5,
    10
   ]
  },
  "excluded_ranges_m": [
   [
    3215.0,
    3248.0
   ],
   [
    7880.0,
    7920.0
   ],
   [
    10268.0,
    10284.0
   ],
   [
    12284.0,
    12363.0
   ],
   [
    13578.0,
    13630.0
   ],
   [
    16360.0,
    16404.0
   ],
   [
    17822.0,
    17862.0
   ],
   [
    17933.0,
    18096.0
   ],
   [
    19274.0,
    19279.0
   ],
   [
    19286.0,
    19291.0
   ],
   [
    19483.0,
    19511.0
   ],
   [
    19748.0,
    19797.0
   ],
   [
    19957.0,
    20038.0
   ],
   [
    20422.0,
    20480.0
   ],
   [
    21214.0,
    21249.0
   ],
   [
    21300.0,
    21377.0
   ],
   [
    21424.0,
    21464.0
   ],
   [
    21557.0,
    21579.0
   ],
   [
    21610.0,
    21640.0
   ],
   [
    22037.0,
    22091.0
   ],
   [
    22131.0,
    22610.0
   ],
   [
    23432.0,
    23479.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "f5ccc1713da600fbea2ba1433fb64f96644949ee",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:8c94015b54267da4",
   "python": "3.14.4",
   "numpy": "2.5.3",
   "rasterio": "1.5.1",
   "pyproj": "3.8.0",
   "laspy": "2.7.0",
   "shapely": "2.1.2",
   "pyosmium": "4.3.1",
   "libosmium": "2.23.1",
   "gdal": "3.12.4",
   "proj": "9.8.1",
   "run_id": "nz-s2",
   "road_pbf": "block-batch-nz-s2.osm.pbf",
   "region_key": "nz",
   "crs": "EPSG:2193",
   "elevation_provider_key": "nz-linz",
   "tile_index": "stac",
   "authority": "linz",
   "registry_pbf": "new-zealand-2026-09-26.osm.pbf",
   "tile_index_snapshot": "sha256:996c8a61eaf9687f"
  },
  "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:2193",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/nz/BU20.tiff",
   "data/cache/nz/BV20.tiff"
  ],
  "calculated_at": "2026-09-28T05:19:22+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-nz-s2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "nz-s2",
  "elevation_provider": "LINZ nz-elevation",
  "elevation_licence": "CC BY 4.0 \u2014 Toit\u016b Te Whenua Land Information New Zealand \u2014 https://nz-elevation.s3.ap-southeast-2.amazonaws.com/LICENSE",
  "elevation_dataset": "New Zealand 1 m DEM/DSM national LiDAR mosaic \u2014 Toit\u016b Te Whenua Land Information New Zealand (LINZ), vertical datum NZVD2016 (LINZ documentation; not re-verified against a benchmark)",
  "elevation_tile_ids": [
   "BU20",
   "BV20"
  ],
  "climb_origin": "named-pass",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 69,
  "structure_mask_ranges_m": [
   [
    17941.1,
    18091.0
   ],
   [
    12300.8,
    12338.3
   ],
   [
    23437.9,
    23473.9
   ],
   [
    22136.5,
    22583.8
   ],
   [
    21305.3,
    21372.7
   ],
   [
    20427.4,
    20475.1
   ],
   [
    19962.9,
    20033.9
   ],
   [
    19753.4,
    19773.5
   ],
   [
    19489.1,
    19506.1
   ],
   [
    3220.8,
    3241.0
   ],
   [
    16365.6,
    16399.8
   ],
   [
    21616.0,
    21635.2
   ],
   [
    22042.9,
    22086.8
   ],
   [
    21562.2,
    21574.4
   ],
   [
    21219.2,
    21244.1
   ],
   [
    10273.3,
    10279.3
   ],
   [
    17827.9,
    17857.9
   ],
   [
    21429.4,
    21459.4
   ]
  ],
  "mask_basin_extension_m": 75.0,
  "carriageway": {
   "stations": 1002,
   "stations_resolved": 1002,
   "width_median_m": 9.0,
   "width_p10_m": 6.5,
   "width_min_m": 0.5,
   "width_max_m": 12.0,
   "bounded_share": 0.068,
   "unbounded_share": 0.932,
   "confidence_median": 0.0,
   "width_median_bounded_m": 7.5,
   "window_m": [
    21904.0,
    21929.0
   ],
   "width_at_max25_m": 9.0,
   "window_stations": 7,
   "single_track": false,
   "single_track_rule": "PROVISIONAL (2026-09-15): width_p10_m <= 3.0 m with bounded_share >= 0.6; recorded, not a rule",
   "status": "ok",
   "source": "dtm",
   "station_m": 25.0,
   "window_station_m": 5.0,
   "halfwidth_m": 6.0,
   "step_m": 0.25,
   "level_tol_m": 0.12,
   "break_min_m": 0.3,
   "stations_failed": 0,
   "hedge_to_hedge": {
    "stations": 1002,
    "stations_resolved": 1002,
    "width_median_m": 10.75,
    "width_p10_m": 5.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.212,
    "unbounded_share": 0.788,
    "confidence_median": 0.0,
    "width_median_bounded_m": 5.5,
    "window_m": [
     21904.0,
     21929.0
    ],
    "width_at_max25_m": 8.75,
    "window_stations": 7,
    "status": "ok",
    "source": "dsm",
    "station_m": 25.0,
    "window_station_m": 5.0,
    "halfwidth_m": 6.0,
    "step_m": 0.25,
    "level_tol_m": 0.5,
    "break_min_m": 0.3,
    "stations_failed": 0
   }
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "West Coast",
  "county": "West Coast",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}