{
 "ocl_version": "0.1.0",
 "name": "Tara Bay Road",
 "slug": "tara-bay-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.13664214559753,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "texture_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 46.0,
   "end_distance_m": 48.0,
   "start_elevation_m": 17.891532533766167,
   "end_elevation_m": 18.534265376678118,
   "min_gradient_pct": -1.6434624439983558,
   "suppressed_max_gradient_pct": 56.46928397345441,
   "suppressed_location_m": [
    187.0,
    189.0
   ],
   "suppressed_min_gradient_pct": -8.653804906793994,
   "suppressed_min_location_m": [
    174.0,
    176.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.6859131441738,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "texture_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 45.0,
   "end_distance_m": 48.0,
   "start_elevation_m": 17.613687982352904,
   "end_elevation_m": 18.534265376678118,
   "min_gradient_pct": -0.13248671112400245,
   "suppressed_max_gradient_pct": 56.39034579125569,
   "suppressed_location_m": [
    187.0,
    190.0
   ],
   "suppressed_min_gradient_pct": -4.041305210276865,
   "suppressed_min_location_m": [
    173.0,
    176.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.005974931739367,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 39.0,
   "end_distance_m": 44.0,
   "start_elevation_m": 15.962800761240617,
   "end_elevation_m": 17.413099507827585,
   "min_gradient_pct": 0.9253190304835357,
   "suppressed_max_gradient_pct": 55.921469870461785,
   "suppressed_location_m": [
    187.0,
    192.0
   ],
   "suppressed_min_gradient_pct": -1.231685405127081,
   "suppressed_min_location_m": [
    172.0,
    177.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.571421133681746,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 38.0,
   "end_distance_m": 48.0,
   "start_elevation_m": 15.677123263309943,
   "end_elevation_m": 18.534265376678118,
   "min_gradient_pct": 4.464118345589352,
   "suppressed_max_gradient_pct": 43.39932995065901,
   "suppressed_location_m": [
    185.0,
    195.0
   ],
   "suppressed_min_gradient_pct": 3.424898205064011,
   "suppressed_min_location_m": [
    167.0,
    177.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.428071560390975,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 31.0,
   "end_distance_m": 51.0,
   "start_elevation_m": 13.96591494636148,
   "end_elevation_m": 19.251529258439675,
   "min_gradient_pct": 4.791741543492369,
   "suppressed_max_gradient_pct": 29.777574669712443,
   "suppressed_location_m": [
    177.0,
    197.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.492620634275923,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 28.0,
   "end_distance_m": 53.0,
   "start_elevation_m": 13.324474043103805,
   "end_elevation_m": 19.697629201672786,
   "min_gradient_pct": 7.735469820510629
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.322761158446614,
   "diagnostic": false,
   "flags": [
    "texture_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 21.0,
   "end_distance_m": 71.0,
   "start_elevation_m": 11.8586185643218,
   "end_elevation_m": 23.019999143545107,
   "min_gradient_pct": 12.548439884859881,
   "suppressed_min_gradient_pct": 11.282863448231637,
   "suppressed_min_location_m": [
    128.0,
    178.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.2165658564847,
   "diagnostic": false,
   "flags": [
    "texture_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 21.0,
   "end_distance_m": 121.0,
   "start_elevation_m": 11.8586185643218,
   "end_elevation_m": 30.0751844208065,
   "min_gradient_pct": 13.2628933219438,
   "suppressed_min_gradient_pct": 12.676214033604296,
   "suppressed_min_location_m": [
    78.0,
    178.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.353,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 89.0,
  "shape_class": "sustained"
 },
 "length_m": 211.305810560305,
 "start_elevation_m": 10.85116153038287,
 "end_elevation_m": 43.69985842080212,
 "endpoint_gain_m": 32.848696890419255,
 "overall_gradient_pct": 15.54557198560543,
 "accumulated_ascent_m": 33.14637058995382,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.005974931739367,
   "start_distance_m": 39.0,
   "end_distance_m": 44.0,
   "midpoint_distance_m": 41.5,
   "start_elevation_m": 15.962800761240617,
   "end_elevation_m": 17.413099507827585,
   "start_xy": [
    1682969.4163757786,
    5437460.391191782
   ],
   "end_xy": [
    1682970.3734541233,
    5437455.492519196
   ]
  },
  "max_10m": {
   "gradient_pct": 28.571421133681746,
   "start_distance_m": 38.0,
   "end_distance_m": 48.0,
   "midpoint_distance_m": 43.0,
   "start_elevation_m": 15.677123263309943,
   "end_elevation_m": 18.534265376678118,
   "start_xy": [
    1682969.3550702943,
    5437461.38806182
   ],
   "end_xy": [
    1682971.7549745634,
    5437451.745478704
   ]
  },
  "max_20m": {
   "gradient_pct": 26.428071560390975,
   "start_distance_m": 31.0,
   "end_distance_m": 51.0,
   "midpoint_distance_m": 41.0,
   "start_elevation_m": 13.96591494636148,
   "end_elevation_m": 19.251529258439675,
   "start_xy": [
    1682969.2083359289,
    5437468.384868033
   ],
   "end_xy": [
    1682973.3602636103,
    5437449.214656541
   ]
  },
  "max_25m": {
   "gradient_pct": 25.492620634275923,
   "start_distance_m": 28.0,
   "end_distance_m": 53.0,
   "midpoint_distance_m": 40.5,
   "start_elevation_m": 13.324474043103805,
   "end_elevation_m": 19.697629201672786,
   "start_xy": [
    1682969.2957823728,
    5437471.383593282
   ],
   "end_xy": [
    1682974.5801724386,
    5437447.634245404
   ]
  },
  "max_50m": {
   "gradient_pct": 22.322761158446614,
   "start_distance_m": 21.0,
   "end_distance_m": 71.0,
   "midpoint_distance_m": 46.0,
   "start_elevation_m": 11.8586185643218,
   "end_elevation_m": 23.019999143545107,
   "start_xy": [
    1682969.7815769708,
    5437478.364438946
   ],
   "end_xy": [
    1682986.7260309719,
    5437434.42994661
   ]
  },
  "max_100m": {
   "gradient_pct": 18.2165658564847,
   "start_distance_m": 21.0,
   "end_distance_m": 121.0,
   "midpoint_distance_m": 71.0,
   "start_elevation_m": 11.8586185643218,
   "end_elevation_m": 30.0751844208065,
   "start_xy": [
    1682969.7815769708,
    5437478.364438946
   ],
   "end_xy": [
    1683031.903631218,
    5437448.24485997
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.9253190304835357,
   "start_distance_m": 15.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 17.5,
   "start_elevation_m": 11.800503854813853,
   "end_elevation_m": 11.84676980633803,
   "start_xy": [
    1682970.6225467406,
    5437484.298249829
   ],
   "end_xy": [
    1682969.8670454493,
    5437479.360779822
   ]
  },
  "min_10m": {
   "gradient_pct": 4.464118345589352,
   "start_distance_m": 11.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 16.0,
   "start_elevation_m": 11.412206729762865,
   "end_elevation_m": 11.8586185643218,
   "start_xy": [
    1682971.3481198067,
    5437488.231892381
   ],
   "end_xy": [
    1682969.7815769708,
    5437478.364438946
   ]
  },
  "min_20m": {
   "gradient_pct": 4.791741543492369,
   "start_distance_m": 1.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 10.900270255623326,
   "end_elevation_m": 11.8586185643218,
   "start_xy": [
    1682974.2199519745,
    5437497.796605806
   ],
   "end_xy": [
    1682969.7815769708,
    5437478.364438946
   ]
  },
  "min_25m": {
   "gradient_pct": 7.735469820510629,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 10.85116153038287,
   "end_elevation_m": 12.785028985510527,
   "start_xy": [
    1682974.531,
    5437498.747
   ],
   "end_xy": [
    1682969.4397030566,
    5437474.379075446
   ]
  },
  "min_50m": {
   "gradient_pct": 12.548439884859881,
   "start_distance_m": 124.0,
   "end_distance_m": 174.0,
   "midpoint_distance_m": 149.0,
   "start_elevation_m": 30.54178358775768,
   "end_elevation_m": 36.81600353018762,
   "start_xy": [
    1683034.4528286282,
    5437449.826502333
   ],
   "end_xy": [
    1683079.452011196,
    5437470.375928336
   ]
  },
  "min_100m": {
   "gradient_pct": 13.2628933219438,
   "start_distance_m": 74.0,
   "end_distance_m": 174.0,
   "midpoint_distance_m": 124.0,
   "start_elevation_m": 23.553110208243822,
   "end_elevation_m": 36.81600353018762,
   "start_xy": [
    1682989.3083322234,
    5437432.903192217
   ],
   "end_xy": [
    1683079.452011196,
    5437470.375928336
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.13664214559753,
   "start_distance_m": 46.0,
   "end_distance_m": 48.0,
   "midpoint_distance_m": 47.0,
   "start_elevation_m": 17.891532533766167,
   "end_elevation_m": 18.534265376678118,
   "start_xy": [
    1682970.9984661837,
    5437453.596882245
   ],
   "end_xy": [
    1682971.7549745634,
    5437451.745478704
   ]
  },
  "max_3m": {
   "gradient_pct": 30.6859131441738,
   "start_distance_m": 45.0,
   "end_distance_m": 48.0,
   "midpoint_distance_m": 46.5,
   "start_elevation_m": 17.613687982352904,
   "end_elevation_m": 18.534265376678118,
   "start_xy": [
    1682970.6315779635,
    5437454.526407358
   ],
   "end_xy": [
    1682971.7549745634,
    5437451.745478704
   ]
  }
 },
 "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": {
  "texture_suppression": {
   "masked_fraction": 0.118,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    50.0,
    100.0
   ],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 20.0,
     "start_m": 177.0,
     "end_m": 197.0,
     "raw_pct": 29.78,
     "reason": "staircase+edge-step"
    },
    {
     "window_m": 10.0,
     "start_m": 185.0,
     "end_m": 195.0,
     "raw_pct": 43.4,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.469,
   "obstruction_max_height_m": 13.2,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    175.0,
    199.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "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/BQ28.tiff"
  ],
  "calculated_at": "2026-09-28T05:03:53+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": [
   "BQ28"
  ],
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 15,
   "stations_resolved": 15,
   "width_median_m": 6.5,
   "width_p10_m": 4.15,
   "width_min_m": 2.5,
   "width_max_m": 12.0,
   "bounded_share": 0.4,
   "unbounded_share": 0.6,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.88,
   "window_m": [
    28.0,
    53.0
   ],
   "width_at_max25_m": 8.0,
   "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": 15,
    "stations_resolved": 15,
    "width_median_m": 2.75,
    "width_p10_m": 1.0,
    "width_min_m": 1.0,
    "width_max_m": 5.25,
    "bounded_share": 1.0,
    "unbounded_share": 0.0,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.75,
    "window_m": [
     28.0,
     53.0
    ],
    "width_at_max25_m": 3.25,
    "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": "Marlborough",
  "county": "Marlborough",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}