{
 "ocl_version": "0.1.0",
 "name": "Bruce Road",
 "slug": "bruce-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 49.38818147610178,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 942.0,
   "end_distance_m": 944.0,
   "start_elevation_m": 87.92251131546108,
   "end_elevation_m": 88.91027494498312,
   "min_gradient_pct": -39.79669697779826,
   "suppressed_max_gradient_pct": 59.471923682747274,
   "suppressed_location_m": [
    31.0,
    33.0
   ],
   "suppressed_min_gradient_pct": -59.014683546931224,
   "suppressed_min_location_m": [
    972.0,
    974.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 45.09472130494269,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 941.0,
   "end_distance_m": 944.0,
   "start_elevation_m": 87.55743330583483,
   "end_elevation_m": 88.91027494498312,
   "min_gradient_pct": -36.036456704468854,
   "suppressed_max_gradient_pct": 54.94495315977209,
   "suppressed_location_m": [
    30.0,
    33.0
   ],
   "suppressed_min_gradient_pct": -56.28589474942961,
   "suppressed_min_location_m": [
    971.0,
    974.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 37.239250356175546,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 941.0,
   "end_distance_m": 946.0,
   "start_elevation_m": 87.55743330583483,
   "end_elevation_m": 89.41939582364361,
   "min_gradient_pct": -32.862060986021504,
   "suppressed_max_gradient_pct": 44.51495884371951,
   "suppressed_location_m": [
    29.0,
    34.0
   ],
   "suppressed_min_gradient_pct": -47.815495739916116,
   "suppressed_min_location_m": [
    970.0,
    975.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 34.02570304199131,
   "diagnostic": false,
   "flags": [
    "structure_excluded_min"
   ],
   "start_distance_m": 926.0,
   "end_distance_m": 936.0,
   "start_elevation_m": 82.94127639905011,
   "end_elevation_m": 86.34384670324924,
   "min_gradient_pct": -19.931207991606783,
   "suppressed_min_gradient_pct": -33.48520254885145,
   "suppressed_min_location_m": [
    970.0,
    980.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 32.39586415843057,
   "diagnostic": false,
   "flags": [
    "structure_excluded_min"
   ],
   "start_distance_m": 925.0,
   "end_distance_m": 945.0,
   "start_elevation_m": 82.73724089122265,
   "end_elevation_m": 89.21641372290877,
   "min_gradient_pct": -15.1506092084864,
   "suppressed_min_gradient_pct": -23.62505642404919,
   "suppressed_min_location_m": [
    966.0,
    986.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 30.654968265579555,
   "diagnostic": false,
   "flags": [
    "structure_excluded_min"
   ],
   "start_distance_m": 920.0,
   "end_distance_m": 945.0,
   "start_elevation_m": 81.55267165651388,
   "end_elevation_m": 89.21641372290877,
   "min_gradient_pct": -14.64075595421582,
   "suppressed_min_gradient_pct": -20.052089586244392,
   "suppressed_min_location_m": [
    959.0,
    984.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.484952892629764,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 918.0,
   "end_distance_m": 968.0,
   "start_elevation_m": 81.48218025466016,
   "end_elevation_m": 89.72465670097505,
   "min_gradient_pct": -11.303155481916948
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.815525892258139,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1597.0,
   "end_distance_m": 1697.0,
   "start_elevation_m": 109.174556199221,
   "end_elevation_m": 121.99008209147914,
   "min_gradient_pct": -7.616418496488109
  }
 ],
 "shape": {
  "ascent_concentration": 0.517,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 112.0,
  "shape_class": "stepped"
 },
 "length_m": 2177.999999999939,
 "start_elevation_m": 70.81669692663414,
 "end_elevation_m": 148.5579103551688,
 "endpoint_gain_m": 77.74121342853465,
 "overall_gradient_pct": 3.569385373211057,
 "accumulated_ascent_m": 113.58527895372664,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 37.239250356175546,
   "start_distance_m": 941.0,
   "end_distance_m": 946.0,
   "midpoint_distance_m": 943.5,
   "start_elevation_m": 87.55743330583483,
   "end_elevation_m": 89.41939582364361,
   "start_xy": [
    2033933.8712466308,
    5736707.516728053
   ],
   "end_xy": [
    2033935.3343748355,
    5736702.735592638
   ]
  },
  "max_10m": {
   "gradient_pct": 34.02570304199131,
   "start_distance_m": 926.0,
   "end_distance_m": 936.0,
   "midpoint_distance_m": 931.0,
   "start_elevation_m": 82.94127639905011,
   "end_elevation_m": 86.34384670324924,
   "start_xy": [
    2033929.481862017,
    5736721.860134298
   ],
   "end_xy": [
    2033932.408118426,
    5736712.297863468
   ]
  },
  "max_20m": {
   "gradient_pct": 32.39586415843057,
   "start_distance_m": 925.0,
   "end_distance_m": 945.0,
   "midpoint_distance_m": 935.0,
   "start_elevation_m": 82.73724089122265,
   "end_elevation_m": 89.21641372290877,
   "start_xy": [
    2033929.1892363762,
    5736722.816361381
   ],
   "end_xy": [
    2033935.0417491945,
    5736703.691819721
   ]
  },
  "max_25m": {
   "gradient_pct": 30.654968265579555,
   "start_distance_m": 920.0,
   "end_distance_m": 945.0,
   "midpoint_distance_m": 932.5,
   "start_elevation_m": 81.55267165651388,
   "end_elevation_m": 89.21641372290877,
   "start_xy": [
    2033927.3813911728,
    5736727.475183489
   ],
   "end_xy": [
    2033935.0417491945,
    5736703.691819721
   ]
  },
  "max_50m": {
   "gradient_pct": 16.484952892629764,
   "start_distance_m": 918.0,
   "end_distance_m": 968.0,
   "midpoint_distance_m": 943.0,
   "start_elevation_m": 81.48218025466016,
   "end_elevation_m": 89.72465670097505,
   "start_xy": [
    2033926.6303518887,
    5736729.32881236
   ],
   "end_xy": [
    2033946.6705213136,
    5736683.929778493
   ]
  },
  "max_100m": {
   "gradient_pct": 12.815525892258139,
   "start_distance_m": 1597.0,
   "end_distance_m": 1697.0,
   "midpoint_distance_m": 1647.0,
   "start_elevation_m": 109.174556199221,
   "end_elevation_m": 121.99008209147914,
   "start_xy": [
    2034451.5263789003,
    5736860.320122478
   ],
   "end_xy": [
    2034468.3815755816,
    5736954.923598516
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -32.862060986021504,
   "start_distance_m": 978.0,
   "end_distance_m": 983.0,
   "midpoint_distance_m": 980.5,
   "start_elevation_m": 86.83361272591519,
   "end_elevation_m": 85.19050967661411,
   "start_xy": [
    2033952.3457552958,
    5736675.696996993
   ],
   "end_xy": [
    2033955.2309525583,
    5736671.61341563
   ]
  },
  "min_10m": {
   "gradient_pct": -19.931207991606783,
   "start_distance_m": 1011.0,
   "end_distance_m": 1021.0,
   "midpoint_distance_m": 1016.0,
   "start_elevation_m": 86.66815653627899,
   "end_elevation_m": 84.67503573711831,
   "start_xy": [
    2033968.0760576562,
    5736646.815138516
   ],
   "end_xy": [
    2033972.4593608277,
    5736637.8388383025
   ]
  },
  "min_20m": {
   "gradient_pct": -15.1506092084864,
   "start_distance_m": 725.0,
   "end_distance_m": 745.0,
   "midpoint_distance_m": 735.0,
   "start_elevation_m": 88.0122760701475,
   "end_elevation_m": 84.98215422845021,
   "start_xy": [
    2033814.170039365,
    5736633.477978306
   ],
   "end_xy": [
    2033832.2139411164,
    5736642.079383707
   ]
  },
  "min_25m": {
   "gradient_pct": -14.64075595421582,
   "start_distance_m": 723.0,
   "end_distance_m": 748.0,
   "midpoint_distance_m": 735.5,
   "start_elevation_m": 88.26780937931909,
   "end_elevation_m": 84.60762039076513,
   "start_xy": [
    2033812.373201546,
    5736632.599699391
   ],
   "end_xy": [
    2033834.883198184,
    5736643.448714458
   ]
  },
  "min_50m": {
   "gradient_pct": -11.303155481916948,
   "start_distance_m": 711.0,
   "end_distance_m": 761.0,
   "midpoint_distance_m": 736.0,
   "start_elevation_m": 89.2161429032252,
   "end_elevation_m": 83.56456516226673,
   "start_xy": [
    2033801.1569075382,
    5736628.642767456
   ],
   "end_xy": [
    2033845.321486439,
    5736651.103139443
   ]
  },
  "min_100m": {
   "gradient_pct": -7.616418496488109,
   "start_distance_m": 708.0,
   "end_distance_m": 808.0,
   "midpoint_distance_m": 758.0,
   "start_elevation_m": 89.27194081344736,
   "end_elevation_m": 81.65552231695925,
   "start_xy": [
    2033798.208478437,
    5736628.088903
   ],
   "end_xy": [
    2033862.0929143096,
    5736693.041663678
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 49.38818147610178,
   "start_distance_m": 942.0,
   "end_distance_m": 944.0,
   "midpoint_distance_m": 943.0,
   "start_elevation_m": 87.92251131546108,
   "end_elevation_m": 88.91027494498312,
   "start_xy": [
    2033934.1638722718,
    5736706.56050097
   ],
   "end_xy": [
    2033934.7491235535,
    5736704.648046804
   ]
  },
  "max_3m": {
   "gradient_pct": 45.09472130494269,
   "start_distance_m": 941.0,
   "end_distance_m": 944.0,
   "midpoint_distance_m": 942.5,
   "start_elevation_m": 87.55743330583483,
   "end_elevation_m": 88.91027494498312,
   "start_xy": [
    2033933.8712466308,
    5736707.516728053
   ],
   "end_xy": [
    2033934.7491235535,
    5736704.648046804
   ]
  }
 },
 "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": 0.022,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0
   ],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.228,
   "obstruction_max_height_m": 32.64,
   "flagged_windows_m": [
    100
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    41.0
   ],
   [
    970.0,
    975.0
   ]
  ],
  "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-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/BF43.tiff"
  ],
  "calculated_at": "2026-09-28T06:17:17+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": [
   "BF43"
  ],
  "route_summit_trim_m": 471.5,
  "route_summit_trim_loss_m": 55.9,
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 2,
  "structure_mask_ranges_m": [
   [
    0.0,
    36.9
   ]
  ],
  "carriageway": {
   "stations": 93,
   "stations_resolved": 93,
   "width_median_m": 4.25,
   "width_p10_m": 3.05,
   "width_min_m": 1.0,
   "width_max_m": 11.5,
   "bounded_share": 0.118,
   "unbounded_share": 0.882,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.0,
   "window_m": [
    920.0,
    945.0
   ],
   "width_at_max25_m": 5.75,
   "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": 93,
    "stations_resolved": 93,
    "width_median_m": 6.5,
    "width_p10_m": 1.3,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.688,
    "unbounded_share": 0.312,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.0,
    "window_m": [
     920.0,
     945.0
    ],
    "width_at_max25_m": 9.25,
    "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": "Gisborne",
  "county": "Gisborne",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}