{
 "ocl_version": "0.1.0",
 "name": "Tukurangi Road",
 "slug": "tukurangi-road",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 50.61832262456818,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1038.0,
   "end_distance_m": 1040.0,
   "start_elevation_m": 120.69787389256066,
   "end_elevation_m": 121.71024034505203,
   "min_gradient_pct": -51.210073046425464,
   "suppressed_max_gradient_pct": 114.11057316187225,
   "suppressed_location_m": [
    3496.0,
    3498.0
   ],
   "suppressed_min_gradient_pct": -67.53476630083384,
   "suppressed_min_location_m": [
    2309.0,
    2311.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 39.575144247415516,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1232.0,
   "end_distance_m": 1235.0,
   "start_elevation_m": 147.70250323206727,
   "end_elevation_m": 148.88975755948974,
   "min_gradient_pct": -48.83125537837619,
   "suppressed_max_gradient_pct": 103.82755544686499,
   "suppressed_location_m": [
    3496.0,
    3499.0
   ],
   "suppressed_min_gradient_pct": -63.99092271959432,
   "suppressed_min_location_m": [
    2309.0,
    2312.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 36.669476598227675,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded",
    "texture_excluded",
    "texture_excluded",
    "suppression_unstable",
    "canopy_or_structure"
   ],
   "start_distance_m": 1038.0,
   "end_distance_m": 1043.0,
   "start_elevation_m": 120.69787389256066,
   "end_elevation_m": 122.53134772247205,
   "min_gradient_pct": -36.56954012594895,
   "suppressed_max_gradient_pct": 91.13528893454486,
   "suppressed_location_m": [
    3494.0,
    3499.0
   ],
   "suppressed_min_gradient_pct": -47.88550750710044,
   "suppressed_min_location_m": [
    2307.0,
    2312.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.609735943035275,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded",
    "texture_excluded",
    "texture_excluded",
    "suppression_unstable",
    "canopy_or_structure"
   ],
   "start_distance_m": 1673.0,
   "end_distance_m": 1683.0,
   "start_elevation_m": 154.2911105651878,
   "end_elevation_m": 156.95208415949133,
   "min_gradient_pct": -30.425777303418613,
   "suppressed_max_gradient_pct": 78.48518673408364,
   "suppressed_location_m": [
    3492.0,
    3502.0
   ],
   "suppressed_min_gradient_pct": -39.4333101255603,
   "suppressed_min_location_m": [
    2308.0,
    2318.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.636853769146427,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded_min",
    "texture_excluded",
    "suppression_unstable",
    "canopy_or_structure"
   ],
   "start_distance_m": 1114.0,
   "end_distance_m": 1134.0,
   "start_elevation_m": 134.36845278439952,
   "end_elevation_m": 138.6958235382288,
   "min_gradient_pct": -25.269651138658276,
   "suppressed_max_gradient_pct": 64.32322908735102,
   "suppressed_location_m": [
    3492.0,
    3512.0
   ],
   "suppressed_min_gradient_pct": -26.302985416839135,
   "suppressed_min_location_m": [
    3538.0,
    3558.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.88384689545876,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 1113.0,
   "end_distance_m": 1138.0,
   "start_elevation_m": 134.2092013076197,
   "end_elevation_m": 139.4301630314844,
   "min_gradient_pct": -22.519612755386333,
   "suppressed_max_gradient_pct": 58.54118390969916,
   "suppressed_location_m": [
    3492.0,
    3517.0
   ],
   "suppressed_min_gradient_pct": -22.787595501675924,
   "suppressed_min_location_m": [
    3537.0,
    3562.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.073476768388332,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "no_bench_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 2476.0,
   "end_distance_m": 2526.0,
   "start_elevation_m": 249.86926844268947,
   "end_elevation_m": 258.90600682688364,
   "min_gradient_pct": -7.7729177098684525,
   "suppressed_max_gradient_pct": 38.13436041717148,
   "suppressed_location_m": [
    3480.0,
    3530.0
   ],
   "suppressed_min_gradient_pct": -9.274370510282267,
   "suppressed_min_location_m": [
    2307.0,
    2357.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.95018351414143,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded"
   ],
   "start_distance_m": 2458.0,
   "end_distance_m": 2558.0,
   "start_elevation_m": 247.04806688039133,
   "end_elevation_m": 263.99825039453276,
   "min_gradient_pct": -7.283011895655868,
   "suppressed_max_gradient_pct": 25.607330111402863,
   "suppressed_location_m": [
    3433.0,
    3533.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.305,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 227.0,
  "shape_class": "sustained"
 },
 "length_m": 3972.0000000000546,
 "start_elevation_m": 41.74417135999459,
 "end_elevation_m": 388.7629815109937,
 "endpoint_gain_m": 347.0188101509991,
 "overall_gradient_pct": 8.736626640256656,
 "accumulated_ascent_m": 434.6188262166275,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 36.669476598227675,
   "start_distance_m": 1038.0,
   "end_distance_m": 1043.0,
   "midpoint_distance_m": 1040.5,
   "start_elevation_m": 120.69787389256066,
   "end_elevation_m": 122.53134772247205,
   "start_xy": [
    1967264.7771096467,
    5684034.519162251
   ],
   "end_xy": [
    1967260.653475788,
    5684037.346819196
   ]
  },
  "max_10m": {
   "gradient_pct": 26.609735943035275,
   "start_distance_m": 1673.0,
   "end_distance_m": 1683.0,
   "midpoint_distance_m": 1678.0,
   "start_elevation_m": 154.2911105651878,
   "end_elevation_m": 156.95208415949133,
   "start_xy": [
    1966828.9701822053,
    5684345.475035015
   ],
   "end_xy": [
    1966818.9703831105,
    5684345.538423213
   ]
  },
  "max_20m": {
   "gradient_pct": 21.636853769146427,
   "start_distance_m": 1114.0,
   "end_distance_m": 1134.0,
   "midpoint_distance_m": 1124.0,
   "start_elevation_m": 134.36845278439952,
   "end_elevation_m": 138.6958235382288,
   "start_xy": [
    1967197.2197782318,
    5684068.299581808
   ],
   "end_xy": [
    1967179.8751964422,
    5684078.064921319
   ]
  },
  "max_25m": {
   "gradient_pct": 20.88384689545876,
   "start_distance_m": 1113.0,
   "end_distance_m": 1138.0,
   "midpoint_distance_m": 1125.5,
   "start_elevation_m": 134.2092013076197,
   "end_elevation_m": 139.4301630314844,
   "start_xy": [
    1967198.1506521692,
    5684067.934241265
   ],
   "end_xy": [
    1967176.53261691,
    5684080.26200167
   ]
  },
  "max_50m": {
   "gradient_pct": 18.073476768388332,
   "start_distance_m": 2476.0,
   "end_distance_m": 2526.0,
   "midpoint_distance_m": 2501.0,
   "start_elevation_m": 249.86926844268947,
   "end_elevation_m": 258.90600682688364,
   "start_xy": [
    1966251.0495482164,
    5684636.864282181
   ],
   "end_xy": [
    1966203.1388729427,
    5684632.409852198
   ]
  },
  "max_100m": {
   "gradient_pct": 16.95018351414143,
   "start_distance_m": 2458.0,
   "end_distance_m": 2558.0,
   "midpoint_distance_m": 2508.0,
   "start_elevation_m": 247.04806688039133,
   "end_elevation_m": 263.99825039453276,
   "start_xy": [
    1966267.567325937,
    5684629.761046885
   ],
   "end_xy": [
    1966177.390290929,
    5684613.445184255
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -36.56954012594895,
   "start_distance_m": 2314.0,
   "end_distance_m": 2319.0,
   "midpoint_distance_m": 2316.5,
   "start_elevation_m": 246.1370604151818,
   "end_elevation_m": 244.30858340888435,
   "start_xy": [
    1966409.6636625617,
    5684643.325480847
   ],
   "end_xy": [
    1966404.805216841,
    5684644.302018528
   ]
  },
  "min_10m": {
   "gradient_pct": -30.425777303418613,
   "start_distance_m": 3540.0,
   "end_distance_m": 3550.0,
   "midpoint_distance_m": 3545.0,
   "start_elevation_m": 367.51779114637907,
   "end_elevation_m": 364.4752134160372,
   "start_xy": [
    1965396.3895746628,
    5684999.3163737245
   ],
   "end_xy": [
    1965387.5711977296,
    5685003.639784926
   ]
  },
  "min_20m": {
   "gradient_pct": -25.269651138658276,
   "start_distance_m": 3539.0,
   "end_distance_m": 3559.0,
   "midpoint_distance_m": 3549.0,
   "start_elevation_m": 367.6763865836308,
   "end_elevation_m": 362.62245635589915,
   "start_xy": [
    1965397.1999579864,
    5684998.739701658
   ],
   "end_xy": [
    1965378.64206047,
    5685004.766952969
   ]
  },
  "min_25m": {
   "gradient_pct": -22.519612755386333,
   "start_distance_m": 3540.0,
   "end_distance_m": 3565.0,
   "midpoint_distance_m": 3552.5,
   "start_elevation_m": 367.51779114637907,
   "end_elevation_m": 361.8878879575325,
   "start_xy": [
    1965396.3895746628,
    5684999.3163737245
   ],
   "end_xy": [
    1965372.6893022968,
    5685005.5183983315
   ]
  },
  "min_50m": {
   "gradient_pct": -7.7729177098684525,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 41.74417135999459,
   "end_elevation_m": 37.85771250506036,
   "start_xy": [
    1967730.61,
    5683588.268
   ],
   "end_xy": [
    1967700.4212335665,
    5683628.036204592
   ]
  },
  "min_100m": {
   "gradient_pct": -7.283011895655868,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 41.74417135999459,
   "end_elevation_m": 34.46115946433872,
   "start_xy": [
    1967730.61,
    5683588.268
   ],
   "end_xy": [
    1967670.9164461081,
    5683668.312366783
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 50.61832262456818,
   "start_distance_m": 1038.0,
   "end_distance_m": 1040.0,
   "midpoint_distance_m": 1039.0,
   "start_elevation_m": 120.69787389256066,
   "end_elevation_m": 121.71024034505203,
   "start_xy": [
    1967264.7771096467,
    5684034.519162251
   ],
   "end_xy": [
    1967263.127656103,
    5684035.650225028
   ]
  },
  "max_3m": {
   "gradient_pct": 39.575144247415516,
   "start_distance_m": 1232.0,
   "end_distance_m": 1235.0,
   "midpoint_distance_m": 1233.5,
   "start_elevation_m": 147.70250323206727,
   "end_elevation_m": 148.88975755948974,
   "start_xy": [
    1967143.4697878335,
    5684162.950740819
   ],
   "end_xy": [
    1967143.7756404537,
    5684165.935109123
   ]
  }
 },
 "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": 0.035,
   "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,
    50.0
   ],
   "minima_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.086,
   "windows_resited": [
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.115,
   "windows_resited": [
    20.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 3,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 2262.0,
     "end_m": 2287.0,
     "raw_pct": 25.64,
     "reason": "hump+mask-edge"
    },
    {
     "window_m": 20.0,
     "start_m": 2260.0,
     "end_m": 2280.0,
     "raw_pct": 27.01,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 2266.0,
     "end_m": 2276.0,
     "raw_pct": 32.41,
     "reason": "hump"
    },
    {
     "window_m": 5.0,
     "start_m": 3122.0,
     "end_m": 3127.0,
     "raw_pct": 40.21,
     "reason": "hump"
    },
    {
     "window_m": 25.0,
     "start_m": 3511.0,
     "end_m": 3536.0,
     "raw_pct": 22.74,
     "reason": "mask-edge"
    },
    {
     "window_m": 20.0,
     "start_m": 3511.0,
     "end_m": 3531.0,
     "raw_pct": 26.03,
     "reason": "mask-edge"
    },
    {
     "window_m": 10.0,
     "start_m": 1899.0,
     "end_m": 1909.0,
     "raw_pct": 31.93,
     "reason": "hump"
    },
    {
     "window_m": 5.0,
     "start_m": 3048.0,
     "end_m": 3053.0,
     "raw_pct": 36.81,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 3232.0,
     "end_m": 3252.0,
     "raw_pct": 22.64,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": [],
   "unstable": [
    {
     "window_m": 10.0,
     "start_m": 1673.0,
     "end_m": 1683.0,
     "raw_pct": 26.61,
     "reason": "short-step",
     "perturbations": [
      "phase+0.000/mask+0",
      "phase+0.333/mask+1",
      "phase+0.667/mask-1"
     ],
     "perturbation_reasons": [
      "short-step",
      "",
      ""
     ]
    },
    {
     "window_m": 5.0,
     "start_m": 1038.0,
     "end_m": 1043.0,
     "raw_pct": 36.67,
     "reason": "mask-edge+short-step",
     "perturbations": [
      "phase+0.000/mask+0",
      "phase+0.333/mask+1",
      "phase+0.667/mask-1"
     ],
     "perturbation_reasons": [
      "mask-edge+short-step",
      "",
      ""
     ]
    },
    {
     "window_m": 20.0,
     "start_m": 1114.0,
     "end_m": 1134.0,
     "raw_pct": 21.64,
     "reason": "staircase",
     "perturbations": [
      "phase+0.000/mask+0",
      "phase+0.333/mask+1",
      "phase+0.667/mask-1"
     ],
     "perturbation_reasons": [
      "staircase",
      "",
      ""
     ]
    }
   ]
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.385,
   "obstruction_max_height_m": 38.36,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25
   ]
  },
  "excluded_ranges_m": [
   [
    243.0,
    249.0
   ],
   [
    308.0,
    313.0
   ],
   [
    390.0,
    396.0
   ],
   [
    476.0,
    483.0
   ],
   [
    509.0,
    514.0
   ],
   [
    768.0,
    773.0
   ],
   [
    828.0,
    841.0
   ],
   [
    1000.0,
    1035.0
   ],
   [
    1060.0,
    1100.0
   ],
   [
    1170.0,
    1210.0
   ],
   [
    1516.0,
    1521.0
   ],
   [
    1629.0,
    1634.0
   ],
   [
    1897.0,
    1950.0
   ],
   [
    2258.0,
    2293.0
   ],
   [
    2307.0,
    2313.0
   ],
   [
    2880.0,
    2950.0
   ],
   [
    3031.0,
    3041.0
   ],
   [
    3046.0,
    3055.0
   ],
   [
    3120.0,
    3129.0
   ],
   [
    3230.0,
    3254.0
   ],
   [
    3490.0,
    3538.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "extent": [
   "descends_at_start"
  ]
 },
 "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-n5",
   "road_pbf": "block-batch-nz-n5.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": "sha256:5991b43afbe40ae2"
  },
  "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/BH40.tiff"
  ],
  "calculated_at": "2026-09-28T06:17:25+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-nz-n5.osm.pbf",
  "osm_snapshot": "",
  "run_id": "nz-n5",
  "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": [
   "BH40"
  ],
  "route_summit_trim_m": 589.1,
  "route_summit_trim_loss_m": 22.7,
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 1,
  "suppression_unstable": [
   5.0,
   10.0,
   20.0
  ],
  "carriageway": {
   "stations": 165,
   "stations_resolved": 165,
   "width_median_m": 4.25,
   "width_p10_m": 2.25,
   "width_min_m": 1.0,
   "width_max_m": 12.0,
   "bounded_share": 0.212,
   "unbounded_share": 0.788,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.0,
   "window_m": [
    1113.0,
    1138.0
   ],
   "width_at_max25_m": 3.0,
   "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": 165,
    "stations_resolved": 165,
    "width_median_m": 4.0,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.818,
    "unbounded_share": 0.182,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.75,
    "window_m": [
     1113.0,
     1138.0
    ],
    "width_at_max25_m": 1.5,
    "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": "Hawke's Bay",
  "county": "Hawke's Bay",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}