{
 "ocl_version": "0.1.0",
 "name": "Moncks Spur Road",
 "slug": "moncks-spur-road-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.544646966076186,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 449.0,
   "end_distance_m": 451.0,
   "start_elevation_m": 100.07141832895343,
   "end_elevation_m": 100.50231126827495,
   "min_gradient_pct": 1.5750122376914533
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 20.968183183079248,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 462.0,
   "end_distance_m": 465.0,
   "start_elevation_m": 102.7103183837013,
   "end_elevation_m": 103.33936387919368,
   "min_gradient_pct": 2.1179294810773777
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 20.8528666396532,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 460.0,
   "end_distance_m": 465.0,
   "start_elevation_m": 102.29672054721102,
   "end_elevation_m": 103.33936387919368,
   "min_gradient_pct": 2.535964111517046
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.58895876007199,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 459.0,
   "end_distance_m": 469.0,
   "start_elevation_m": 102.09470700267406,
   "end_elevation_m": 104.15360287868126,
   "min_gradient_pct": 3.6805783397235814
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.410922748639138,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 449.0,
   "end_distance_m": 469.0,
   "start_elevation_m": 100.07141832895343,
   "end_elevation_m": 104.15360287868126,
   "min_gradient_pct": 4.86217943446178
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.323387679145753,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 449.0,
   "end_distance_m": 474.0,
   "start_elevation_m": 100.07141832895343,
   "end_elevation_m": 105.15226524873987,
   "min_gradient_pct": 5.3317988428275385
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.63098917493349,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 437.0,
   "end_distance_m": 487.0,
   "start_elevation_m": 97.87132970665124,
   "end_elevation_m": 107.68682429411798,
   "min_gradient_pct": 7.2898512325144225
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.799135483980493,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 388.0,
   "end_distance_m": 488.0,
   "start_elevation_m": 89.06411637736673,
   "end_elevation_m": 107.86325186134722,
   "min_gradient_pct": 8.453204885274857
  }
 ],
 "shape": {
  "ascent_concentration": 0.323,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 726.0,
  "shape_class": "sustained"
 },
 "length_m": 1124.4999999998267,
 "start_elevation_m": 34.54738415286552,
 "end_elevation_m": 185.40092897719632,
 "endpoint_gain_m": 150.8535448243308,
 "overall_gradient_pct": 13.4151662805117,
 "accumulated_ascent_m": 150.8987592245782,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 20.8528666396532,
   "start_distance_m": 460.0,
   "end_distance_m": 465.0,
   "midpoint_distance_m": 462.5,
   "start_elevation_m": 102.29672054721102,
   "end_elevation_m": 103.33936387919368,
   "start_xy": [
    1578567.524662372,
    5176065.037697282
   ],
   "end_xy": [
    1578565.016094603,
    5176060.71252818
   ]
  },
  "max_10m": {
   "gradient_pct": 20.58895876007199,
   "start_distance_m": 459.0,
   "end_distance_m": 469.0,
   "midpoint_distance_m": 464.0,
   "start_elevation_m": 102.09470700267406,
   "end_elevation_m": 104.15360287868126,
   "start_xy": [
    1578568.0263759256,
    5176065.902731102
   ],
   "end_xy": [
    1578563.009240388,
    5176057.2523929
   ]
  },
  "max_20m": {
   "gradient_pct": 20.410922748639138,
   "start_distance_m": 449.0,
   "end_distance_m": 469.0,
   "midpoint_distance_m": 459.0,
   "start_elevation_m": 100.07141832895343,
   "end_elevation_m": 104.15360287868126,
   "start_xy": [
    1578573.0435114633,
    5176074.553069303
   ],
   "end_xy": [
    1578563.009240388,
    5176057.2523929
   ]
  },
  "max_25m": {
   "gradient_pct": 20.323387679145753,
   "start_distance_m": 449.0,
   "end_distance_m": 474.0,
   "midpoint_distance_m": 461.5,
   "start_elevation_m": 100.07141832895343,
   "end_elevation_m": 105.15226524873987,
   "start_xy": [
    1578573.0435114633,
    5176074.553069303
   ],
   "end_xy": [
    1578560.1452516005,
    5176053.161170739
   ]
  },
  "max_50m": {
   "gradient_pct": 19.63098917493349,
   "start_distance_m": 437.0,
   "end_distance_m": 487.0,
   "midpoint_distance_m": 462.0,
   "start_elevation_m": 97.87132970665124,
   "end_elevation_m": 107.68682429411798,
   "start_xy": [
    1578579.064096275,
    5176084.933462286
   ],
   "end_xy": [
    1578550.0758361218,
    5176045.119109848
   ]
  },
  "max_100m": {
   "gradient_pct": 18.799135483980493,
   "start_distance_m": 388.0,
   "end_distance_m": 488.0,
   "midpoint_distance_m": 438.0,
   "start_elevation_m": 89.06411637736673,
   "end_elevation_m": 107.86325186134722,
   "start_xy": [
    1578603.6444710651,
    5176127.322200316
   ],
   "end_xy": [
    1578549.1636460247,
    5176044.709342564
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 2.535964111517046,
   "start_distance_m": 1029.0,
   "end_distance_m": 1034.0,
   "midpoint_distance_m": 1031.5,
   "start_elevation_m": 177.21658105805247,
   "end_elevation_m": 177.34337926362832,
   "start_xy": [
    1578117.452364474,
    5175865.341947225
   ],
   "end_xy": [
    1578114.3510986501,
    5175868.256781023
   ]
  },
  "min_10m": {
   "gradient_pct": 3.6805783397235814,
   "start_distance_m": 1027.0,
   "end_distance_m": 1037.0,
   "midpoint_distance_m": 1032.0,
   "start_elevation_m": 177.12821623033994,
   "end_elevation_m": 177.4962740643123,
   "start_xy": [
    1578118.5476135835,
    5175863.668498873
   ],
   "end_xy": [
    1578111.628913913,
    5175866.995943897
   ]
  },
  "min_20m": {
   "gradient_pct": 4.86217943446178,
   "start_distance_m": 1024.0,
   "end_distance_m": 1044.0,
   "midpoint_distance_m": 1034.0,
   "start_elevation_m": 176.9229025621804,
   "end_elevation_m": 177.89533844907277,
   "start_xy": [
    1578120.1904872477,
    5175861.158326344
   ],
   "end_xy": [
    1578105.0942981127,
    5175864.507449394
   ]
  },
  "min_25m": {
   "gradient_pct": 5.3317988428275385,
   "start_distance_m": 1018.0,
   "end_distance_m": 1043.0,
   "midpoint_distance_m": 1030.5,
   "start_elevation_m": 176.48405440374108,
   "end_elevation_m": 177.81700411444797,
   "start_xy": [
    1578123.476234576,
    5175856.137981286
   ],
   "end_xy": [
    1578106.0452043153,
    5175864.80815047
   ]
  },
  "min_50m": {
   "gradient_pct": 7.2898512325144225,
   "start_distance_m": 1009.0,
   "end_distance_m": 1059.0,
   "midpoint_distance_m": 1034.0,
   "start_elevation_m": 175.7111773749014,
   "end_elevation_m": 179.35610299115862,
   "start_xy": [
    1578128.837557744,
    5175848.960582718
   ],
   "end_xy": [
    1578090.1897716601,
    5175863.5565893045
   ]
  },
  "min_100m": {
   "gradient_pct": 8.453204885274857,
   "start_distance_m": 1012.0,
   "end_distance_m": 1112.0,
   "midpoint_distance_m": 1062.0,
   "start_elevation_m": 176.00265355983694,
   "end_elevation_m": 184.4558584451118,
   "start_xy": [
    1578126.7619819045,
    5175851.117636229
   ],
   "end_xy": [
    1578038.9335124386,
    5175853.767684953
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.544646966076186,
   "start_distance_m": 449.0,
   "end_distance_m": 451.0,
   "midpoint_distance_m": 450.0,
   "start_elevation_m": 100.07141832895343,
   "end_elevation_m": 100.50231126827495,
   "start_xy": [
    1578573.0435114633,
    5176074.553069303
   ],
   "end_xy": [
    1578572.040084356,
    5176072.823001662
   ]
  },
  "max_3m": {
   "gradient_pct": 20.968183183079248,
   "start_distance_m": 462.0,
   "end_distance_m": 465.0,
   "midpoint_distance_m": 463.5,
   "start_elevation_m": 102.7103183837013,
   "end_elevation_m": 103.33936387919368,
   "start_xy": [
    1578566.5212352644,
    5176063.307629641
   ],
   "end_xy": [
    1578565.016094603,
    5176060.71252818
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.02,
   "obstruction_max_height_m": 9.43,
   "flagged_windows_m": []
  },
  "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-s3",
   "road_pbf": "block-batch-nz-s3.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": "sha256:65f98740b9968e3e"
  },
  "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/BX24.tiff"
  ],
  "calculated_at": "2026-09-28T05:36:43+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-nz-s3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "nz-s3",
  "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": [
   "BX24"
  ],
  "route_cut_m": 1124.5,
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked",
  "carriageway": {
   "stations": 51,
   "stations_resolved": 51,
   "width_median_m": 8.75,
   "width_p10_m": 6.75,
   "width_min_m": 6.25,
   "width_max_m": 12.0,
   "bounded_share": 0.196,
   "unbounded_share": 0.804,
   "confidence_median": 0.0,
   "width_median_bounded_m": 8.0,
   "window_m": [
    449.0,
    474.0
   ],
   "width_at_max25_m": 9.5,
   "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": 51,
    "stations_resolved": 51,
    "width_median_m": 7.75,
    "width_p10_m": 3.5,
    "width_min_m": 1.25,
    "width_max_m": 12.0,
    "bounded_share": 0.588,
    "unbounded_share": 0.412,
    "confidence_median": 1.0,
    "width_median_bounded_m": 6.25,
    "window_m": [
     449.0,
     474.0
    ],
    "width_at_max25_m": 6.25,
    "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": "Linwood-Central-Heathcote Community",
  "county": "Canterbury",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}