{
 "ocl_version": "0.1.0",
 "name": "Cissy Bay Road",
 "slug": "cissy-bay-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 42.072844309341306,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 912.0,
   "end_distance_m": 914.0,
   "start_elevation_m": 45.91973133831452,
   "end_elevation_m": 46.761188224501346,
   "min_gradient_pct": -45.67799738046361,
   "suppressed_max_gradient_pct": 82.26142399261673,
   "suppressed_location_m": [
    527.0,
    529.0
   ],
   "suppressed_min_gradient_pct": -192.4782817007683,
   "suppressed_min_location_m": [
    518.0,
    520.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 39.68900399212695,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "placement_excluded_min"
   ],
   "start_distance_m": 678.0,
   "end_distance_m": 681.0,
   "start_elevation_m": 18.941583864300295,
   "end_elevation_m": 20.132253984064103,
   "min_gradient_pct": -29.45778464102086,
   "suppressed_max_gradient_pct": 74.28312098518502,
   "suppressed_location_m": [
    527.0,
    530.0
   ],
   "suppressed_min_gradient_pct": -152.51575343488446,
   "suppressed_min_location_m": [
    517.0,
    520.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 36.061231485007994,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "placement_excluded_min",
    "suppression_unstable"
   ],
   "start_distance_m": 911.0,
   "end_distance_m": 916.0,
   "start_elevation_m": 45.575942566141514,
   "end_elevation_m": 47.37900414039191,
   "min_gradient_pct": -19.734587847057767,
   "suppressed_max_gradient_pct": 66.1078339812174,
   "suppressed_location_m": [
    527.0,
    532.0
   ],
   "suppressed_min_gradient_pct": -101.71447651796743,
   "suppressed_min_location_m": [
    515.0,
    520.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.230367200815056,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "placement_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 674.0,
   "end_distance_m": 684.0,
   "start_elevation_m": 17.959322566740642,
   "end_elevation_m": 20.882359286822147,
   "min_gradient_pct": -15.061733930901188,
   "suppressed_max_gradient_pct": 50.16968925612389,
   "suppressed_location_m": [
    525.0,
    535.0
   ],
   "suppressed_min_gradient_pct": -63.36405879387239,
   "suppressed_min_location_m": [
    511.0,
    521.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.253184999299222,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 771.0,
   "end_distance_m": 791.0,
   "start_elevation_m": 33.027510932503674,
   "end_elevation_m": 37.87814793236352,
   "min_gradient_pct": -13.669875184072472,
   "suppressed_max_gradient_pct": 33.33189314327653,
   "suppressed_location_m": [
    521.0,
    541.0
   ],
   "suppressed_min_gradient_pct": -33.454424485021164,
   "suppressed_min_location_m": [
    282.0,
    302.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.78475759138956,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 765.0,
   "end_distance_m": 790.0,
   "start_elevation_m": 32.6470366204736,
   "end_elevation_m": 37.84322601832099,
   "min_gradient_pct": -12.876601278893618,
   "suppressed_max_gradient_pct": 28.31918127454131,
   "suppressed_location_m": [
    526.0,
    551.0
   ],
   "suppressed_min_gradient_pct": -30.203033901323703,
   "suppressed_min_location_m": [
    271.0,
    296.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.6563701434876,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 740.0,
   "end_distance_m": 790.0,
   "start_elevation_m": 28.51504094657719,
   "end_elevation_m": 37.84322601832099,
   "min_gradient_pct": -8.166395888368926,
   "suppressed_max_gradient_pct": 18.821018728814337,
   "suppressed_location_m": [
    521.0,
    571.0
   ],
   "suppressed_min_gradient_pct": -19.482854337667046,
   "suppressed_min_location_m": [
    270.0,
    320.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.93956942777317,
   "diagnostic": false,
   "flags": [
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 678.0,
   "end_distance_m": 778.0,
   "start_elevation_m": 18.941583864300295,
   "end_elevation_m": 34.88115329207346,
   "min_gradient_pct": -6.231048910433806,
   "suppressed_min_gradient_pct": -10.370537016465658,
   "suppressed_min_location_m": [
    270.0,
    370.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.399,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 80.0,
  "shape_class": "sustained"
 },
 "length_m": 1062.5403245969324,
 "start_elevation_m": 7.340824641982881,
 "end_elevation_m": 67.1891167870675,
 "endpoint_gain_m": 59.84829214508463,
 "overall_gradient_pct": 5.632566666849813,
 "accumulated_ascent_m": 97.90386545855114,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 36.061231485007994,
   "start_distance_m": 911.0,
   "end_distance_m": 916.0,
   "midpoint_distance_m": 913.5,
   "start_elevation_m": 45.575942566141514,
   "end_elevation_m": 47.37900414039191,
   "start_xy": [
    1669931.6466245372,
    5461935.286028619
   ],
   "end_xy": [
    1669931.4648480066,
    5461930.341519324
   ]
  },
  "max_10m": {
   "gradient_pct": 29.230367200815056,
   "start_distance_m": 674.0,
   "end_distance_m": 684.0,
   "midpoint_distance_m": 679.0,
   "start_elevation_m": 17.959322566740642,
   "end_elevation_m": 20.882359286822147,
   "start_xy": [
    1669756.4328443576,
    5462004.4834508225
   ],
   "end_xy": [
    1669752.6721224694,
    5461995.226103874
   ]
  },
  "max_20m": {
   "gradient_pct": 24.253184999299222,
   "start_distance_m": 771.0,
   "end_distance_m": 791.0,
   "midpoint_distance_m": 781.0,
   "start_elevation_m": 33.027510932503674,
   "end_elevation_m": 37.87814793236352,
   "start_xy": [
    1669812.1045790957,
    5461947.079930534
   ],
   "end_xy": [
    1669828.731440671,
    5461957.814363478
   ]
  },
  "max_25m": {
   "gradient_pct": 20.78475759138956,
   "start_distance_m": 765.0,
   "end_distance_m": 790.0,
   "midpoint_distance_m": 777.5,
   "start_elevation_m": 32.6470366204736,
   "end_elevation_m": 37.84322601832099,
   "start_xy": [
    1669806.157116334,
    5461946.287663725
   ],
   "end_xy": [
    1669827.9577309617,
    5461957.1808231985
   ]
  },
  "max_50m": {
   "gradient_pct": 18.6563701434876,
   "start_distance_m": 740.0,
   "end_distance_m": 790.0,
   "midpoint_distance_m": 765.0,
   "start_elevation_m": 28.51504094657719,
   "end_elevation_m": 37.84322601832099,
   "start_xy": [
    1669784.027516973,
    5461956.451770372
   ],
   "end_xy": [
    1669827.9577309617,
    5461957.1808231985
   ]
  },
  "max_100m": {
   "gradient_pct": 15.93956942777317,
   "start_distance_m": 678.0,
   "end_distance_m": 778.0,
   "midpoint_distance_m": 728.0,
   "start_elevation_m": 18.941583864300295,
   "end_elevation_m": 34.88115329207346,
   "start_xy": [
    1669754.88765335,
    5462000.793954278
   ],
   "end_xy": [
    1669818.3188138306,
    5461950.083058053
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -19.734587847057767,
   "start_distance_m": 253.0,
   "end_distance_m": 258.0,
   "midpoint_distance_m": 255.5,
   "start_elevation_m": 14.77253708660605,
   "end_elevation_m": 13.785807694253162,
   "start_xy": [
    1669529.7277598006,
    5462119.5528597245
   ],
   "end_xy": [
    1669533.97862917,
    5462122.1853698585
   ]
  },
  "min_10m": {
   "gradient_pct": -15.061733930901188,
   "start_distance_m": 381.0,
   "end_distance_m": 391.0,
   "midpoint_distance_m": 386.0,
   "start_elevation_m": 4.929671320743044,
   "end_elevation_m": 3.423497927652925,
   "start_xy": [
    1669620.1820128479,
    5462199.9637450185
   ],
   "end_xy": [
    1669630.135544438,
    5462199.169399032
   ]
  },
  "min_20m": {
   "gradient_pct": -13.669875184072472,
   "start_distance_m": 376.0,
   "end_distance_m": 396.0,
   "midpoint_distance_m": 386.0,
   "start_elevation_m": 5.522383217275839,
   "end_elevation_m": 2.788408180461344,
   "start_xy": [
    1669615.1865934604,
    5462200.0571896965
   ],
   "end_xy": [
    1669635.0866699829,
    5462198.472006862
   ]
  },
  "min_25m": {
   "gradient_pct": -12.876601278893618,
   "start_distance_m": 374.0,
   "end_distance_m": 399.0,
   "midpoint_distance_m": 386.5,
   "start_elevation_m": 5.688610589737293,
   "end_elevation_m": 2.4694602700138892,
   "start_xy": [
    1669613.1980898324,
    5462199.84305581
   ],
   "end_xy": [
    1669638.0573453098,
    5462198.0535715595
   ]
  },
  "min_50m": {
   "gradient_pct": -8.166395888368926,
   "start_distance_m": 366.0,
   "end_distance_m": 416.0,
   "midpoint_distance_m": 391.0,
   "start_elevation_m": 6.046415993833277,
   "end_elevation_m": 1.9632180496488132,
   "start_xy": [
    1669605.29690834,
    5462198.784565688
   ],
   "end_xy": [
    1669654.0431045673,
    5462192.277119491
   ]
  },
  "min_100m": {
   "gradient_pct": -6.231048910433806,
   "start_distance_m": 294.0,
   "end_distance_m": 394.0,
   "midpoint_distance_m": 344.0,
   "start_elevation_m": 9.246460041327921,
   "end_elevation_m": 3.015411130894116,
   "start_xy": [
    1669553.4985071195,
    5462151.927712516
   ],
   "end_xy": [
    1669633.1062197648,
    5462198.75096373
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 42.072844309341306,
   "start_distance_m": 912.0,
   "end_distance_m": 914.0,
   "midpoint_distance_m": 913.0,
   "start_elevation_m": 45.91973133831452,
   "end_elevation_m": 46.761188224501346,
   "start_xy": [
    1669931.7351703716,
    5461934.289956516
   ],
   "end_xy": [
    1669931.868752408,
    5461932.300310082
   ]
  },
  "max_3m": {
   "gradient_pct": 39.68900399212695,
   "start_distance_m": 678.0,
   "end_distance_m": 681.0,
   "midpoint_distance_m": 679.5,
   "start_elevation_m": 18.941583864300295,
   "end_elevation_m": 20.132253984064103,
   "start_xy": [
    1669754.88765335,
    5462000.793954278
   ],
   "end_xy": [
    1669753.7287600944,
    5461998.02683187
   ]
  }
 },
 "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": 0.078,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "minima_unresolved": []
  },
  "placement_suppression": {
   "masked_fraction": 0.1,
   "windows_resited": [],
   "windows_unresolved": [],
   "minima_resited": [
    3.0,
    5.0,
    10.0
   ],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 0,
   "windows_masked": [],
   "advisory": [],
   "unresolved": [],
   "unstable": [
    {
     "window_m": 5.0,
     "start_m": 911.0,
     "end_m": 916.0,
     "raw_pct": 36.06,
     "reason": "hump",
     "perturbations": [
      "phase+0.000/mask+0",
      "phase+0.333/mask+1",
      "phase+0.667/mask-1"
     ],
     "perturbation_reasons": [
      "hump",
      "hump",
      ""
     ]
    }
   ]
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.234,
   "obstruction_max_height_m": 12.58,
   "flagged_windows_m": [
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    157.0,
    162.0
   ],
   [
    260.0,
    293.0
   ],
   [
    476.0,
    541.0
   ]
  ],
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "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-n1",
   "road_pbf": "block-batch-nz-n1.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:ff0dec6edae18a40"
  },
  "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/BP28.tiff"
  ],
  "calculated_at": "2026-09-28T05:03:33+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-nz-n1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "nz-n1",
  "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": [
   "BP28"
  ],
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 1,
  "suppression_unstable": [
   5.0
  ],
  "carriageway": {
   "stations": 48,
   "stations_resolved": 48,
   "width_median_m": 3.5,
   "width_p10_m": 1.5,
   "width_min_m": 1.0,
   "width_max_m": 11.75,
   "bounded_share": 0.479,
   "unbounded_share": 0.521,
   "confidence_median": 0.0,
   "width_median_bounded_m": 2.25,
   "window_m": [
    765.0,
    790.0
   ],
   "width_at_max25_m": 2.5,
   "window_stations": 6,
   "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": 48,
    "stations_resolved": 48,
    "width_median_m": 4.12,
    "width_p10_m": 1.75,
    "width_min_m": 1.0,
    "width_max_m": 12.0,
    "bounded_share": 0.854,
    "unbounded_share": 0.146,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.5,
    "window_m": [
     765.0,
     790.0
    ],
    "width_at_max25_m": 2.5,
    "window_stations": 6,
    "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": "Marlborough",
  "county": "Marlborough",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}