{
 "ocl_version": "0.1.0",
 "name": "McKenzie Beach Road",
 "slug": "mckenzie-beach-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.18961430923639,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 687.0,
   "end_distance_m": 689.0,
   "start_elevation_m": 221.35835030972135,
   "end_elevation_m": 221.96214259590607,
   "min_gradient_pct": -13.31593474416053,
   "suppressed_max_gradient_pct": 47.3334913593618,
   "suppressed_location_m": [
    245.0,
    247.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.32349718558669,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 752.0,
   "end_distance_m": 755.0,
   "start_elevation_m": 234.21490824299414,
   "end_elevation_m": 235.09461315856174,
   "min_gradient_pct": -12.980795276552234,
   "suppressed_max_gradient_pct": 41.39242969785831,
   "suppressed_location_m": [
    245.0,
    248.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.95228094083859,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 686.0,
   "end_distance_m": 691.0,
   "start_elevation_m": 221.14100142833655,
   "end_elevation_m": 222.48861547537848,
   "min_gradient_pct": -12.439375086927384,
   "suppressed_max_gradient_pct": 33.74870214299847,
   "suppressed_location_m": [
    244.0,
    249.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.15163969615037,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 745.0,
   "end_distance_m": 755.0,
   "start_elevation_m": 232.6794491889467,
   "end_elevation_m": 235.09461315856174,
   "min_gradient_pct": -10.99356841500736,
   "suppressed_max_gradient_pct": 30.641147221791982,
   "suppressed_location_m": [
    245.0,
    255.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.896436520299233,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "suppression_unstable",
    "texture_excluded"
   ],
   "start_distance_m": 741.0,
   "end_distance_m": 761.0,
   "start_elevation_m": 231.77512927181053,
   "end_elevation_m": 236.35441657587037,
   "min_gradient_pct": -7.7159679258792835,
   "suppressed_max_gradient_pct": 25.960459382987153,
   "suppressed_location_m": [
    239.0,
    259.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.923389592532203,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 737.0,
   "end_distance_m": 762.0,
   "start_elevation_m": 231.06489530823023,
   "end_elevation_m": 236.54574270636328,
   "min_gradient_pct": -7.341019420522798,
   "suppressed_max_gradient_pct": 23.974330779348293,
   "suppressed_location_m": [
    238.0,
    263.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.044664800331702,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 712.0,
   "end_distance_m": 762.0,
   "start_elevation_m": 226.02341030619743,
   "end_elevation_m": 236.54574270636328,
   "min_gradient_pct": -5.116501330353117
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.09372458876385,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 684.0,
   "end_distance_m": 784.0,
   "start_elevation_m": 220.6904405124534,
   "end_elevation_m": 240.78416510121724,
   "min_gradient_pct": -0.03978432013644806
  }
 ],
 "shape": {
  "ascent_concentration": 0.39,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 189.0,
  "shape_class": "sustained"
 },
 "length_m": 1353.0000000000514,
 "start_elevation_m": 135.87119558171563,
 "end_elevation_m": 281.0696398856296,
 "endpoint_gain_m": 145.198444303914,
 "overall_gradient_pct": 10.731592335839503,
 "accumulated_ascent_m": 151.31554355591368,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.95228094083859,
   "start_distance_m": 686.0,
   "end_distance_m": 691.0,
   "midpoint_distance_m": 688.5,
   "start_elevation_m": 221.14100142833655,
   "end_elevation_m": 222.48861547537848,
   "start_xy": [
    1314047.7737416783,
    4960897.817305895
   ],
   "end_xy": [
    1314047.1555231935,
    4960902.737264997
   ]
  },
  "max_10m": {
   "gradient_pct": 24.15163969615037,
   "start_distance_m": 745.0,
   "end_distance_m": 755.0,
   "midpoint_distance_m": 750.0,
   "start_elevation_m": 232.6794491889467,
   "end_elevation_m": 235.09461315856174,
   "start_xy": [
    1314045.3079278774,
    4960956.647512003
   ],
   "end_xy": [
    1314044.1836261426,
    4960966.584108281
   ]
  },
  "max_20m": {
   "gradient_pct": 22.896436520299233,
   "start_distance_m": 741.0,
   "end_distance_m": 761.0,
   "midpoint_distance_m": 751.0,
   "start_elevation_m": 231.77512927181053,
   "end_elevation_m": 236.35441657587037,
   "start_xy": [
    1314045.7576485712,
    4960952.6728734905
   ],
   "end_xy": [
    1314043.5090451017,
    4960972.546066049
   ]
  },
  "max_25m": {
   "gradient_pct": 21.923389592532203,
   "start_distance_m": 737.0,
   "end_distance_m": 762.0,
   "midpoint_distance_m": 749.5,
   "start_elevation_m": 231.06489530823023,
   "end_elevation_m": 236.54574270636328,
   "start_xy": [
    1314046.2073692651,
    4960948.698234979
   ],
   "end_xy": [
    1314043.3966149283,
    4960973.539725676
   ]
  },
  "max_50m": {
   "gradient_pct": 21.044664800331702,
   "start_distance_m": 712.0,
   "end_distance_m": 762.0,
   "midpoint_distance_m": 737.0,
   "start_elevation_m": 226.02341030619743,
   "end_elevation_m": 236.54574270636328,
   "start_xy": [
    1314047.012415114,
    4960923.7367773745
   ],
   "end_xy": [
    1314043.3966149283,
    4960973.539725676
   ]
  },
  "max_100m": {
   "gradient_pct": 20.09372458876385,
   "start_distance_m": 684.0,
   "end_distance_m": 784.0,
   "midpoint_distance_m": 734.0,
   "start_elevation_m": 220.6904405124534,
   "end_elevation_m": 240.78416510121724,
   "start_xy": [
    1314048.2978374565,
    4960895.8871961525
   ],
   "end_xy": [
    1314040.923151112,
    4960995.40023749
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.439375086927384,
   "start_distance_m": 81.0,
   "end_distance_m": 86.0,
   "midpoint_distance_m": 83.5,
   "start_elevation_m": 143.13808866024914,
   "end_elevation_m": 142.51611990590277,
   "start_xy": [
    1314168.1427106594,
    4960433.4250122085
   ],
   "end_xy": [
    1314164.4376343372,
    4960430.516248324
   ]
  },
  "min_10m": {
   "gradient_pct": -10.99356841500736,
   "start_distance_m": 77.0,
   "end_distance_m": 87.0,
   "midpoint_distance_m": 82.0,
   "start_elevation_m": 143.53843306869126,
   "end_elevation_m": 142.43907622719053,
   "start_xy": [
    1314171.8182083042,
    4960434.982889751
   ],
   "end_xy": [
    1314164.1826976647,
    4960429.549290572
   ]
  },
  "min_20m": {
   "gradient_pct": -7.7159679258792835,
   "start_distance_m": 1087.0,
   "end_distance_m": 1107.0,
   "midpoint_distance_m": 1097.0,
   "start_elevation_m": 269.0617007687874,
   "end_elevation_m": 267.5185071836115,
   "start_xy": [
    1314270.8474277179,
    4960905.3251872305
   ],
   "end_xy": [
    1314288.0446355634,
    4960895.114602412
   ]
  },
  "min_25m": {
   "gradient_pct": -7.341019420522798,
   "start_distance_m": 1085.0,
   "end_distance_m": 1110.0,
   "midpoint_distance_m": 1097.5,
   "start_elevation_m": 269.18589652528584,
   "end_elevation_m": 267.35064167015514,
   "start_xy": [
    1314269.1277069333,
    4960906.346245712
   ],
   "end_xy": [
    1314290.62421674,
    4960893.583014689
   ]
  },
  "min_50m": {
   "gradient_pct": -5.116501330353117,
   "start_distance_m": 1069.0,
   "end_distance_m": 1119.0,
   "midpoint_distance_m": 1094.0,
   "start_elevation_m": 269.6217948988548,
   "end_elevation_m": 267.0635442336782,
   "start_xy": [
    1314255.369940657,
    4960914.514713566
   ],
   "end_xy": [
    1314298.3629602706,
    4960888.988251521
   ]
  },
  "min_100m": {
   "gradient_pct": -0.03978432013644806,
   "start_distance_m": 1038.0,
   "end_distance_m": 1138.0,
   "midpoint_distance_m": 1088.0,
   "start_elevation_m": 267.9071657309563,
   "end_elevation_m": 267.86738141081986,
   "start_xy": [
    1314229.1735511955,
    4960930.990640828
   ],
   "end_xy": [
    1314314.2038714045,
    4960878.553741919
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.18961430923639,
   "start_distance_m": 687.0,
   "end_distance_m": 689.0,
   "midpoint_distance_m": 688.0,
   "start_elevation_m": 221.35835030972135,
   "end_elevation_m": 221.96214259590607,
   "start_xy": [
    1314047.5116937892,
    4960898.782360765
   ],
   "end_xy": [
    1314047.1691525346,
    4960900.737311438
   ]
  },
  "max_3m": {
   "gradient_pct": 29.32349718558669,
   "start_distance_m": 752.0,
   "end_distance_m": 755.0,
   "midpoint_distance_m": 753.5,
   "start_elevation_m": 234.21490824299414,
   "end_elevation_m": 235.09461315856174,
   "start_xy": [
    1314044.520916663,
    4960963.603129398
   ],
   "end_xy": [
    1314044.1836261426,
    4960966.584108281
   ]
  }
 },
 "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": 0.033,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 2,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 238.0,
     "end_m": 263.0,
     "raw_pct": 23.97,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 239.0,
     "end_m": 259.0,
     "raw_pct": 25.96,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 245.0,
     "end_m": 255.0,
     "raw_pct": 30.64,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 308.0,
     "end_m": 318.0,
     "raw_pct": 29.24,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": [],
   "unstable": [
    {
     "window_m": 20.0,
     "start_m": 302.0,
     "end_m": 322.0,
     "raw_pct": 23.15,
     "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": 0.014,
   "obstruction_max_height_m": 7.79,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    236.0,
    265.0
   ],
   [
    306.0,
    320.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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-s1",
   "road_pbf": "block-batch-nz-s1.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/CD13.tiff"
  ],
  "calculated_at": "2026-09-28T05:20:31+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-nz-s1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "nz-s1",
  "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": [
   "CD13"
  ],
  "route_summit_trim_m": 443.2,
  "route_summit_trim_loss_m": 12.8,
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 1,
  "suppression_unstable": [
   20.0
  ],
  "carriageway": {
   "stations": 61,
   "stations_resolved": 61,
   "width_median_m": 4.0,
   "width_p10_m": 2.25,
   "width_min_m": 1.0,
   "width_max_m": 10.5,
   "bounded_share": 0.41,
   "unbounded_share": 0.59,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.0,
   "window_m": [
    737.0,
    762.0
   ],
   "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": 61,
    "stations_resolved": 61,
    "width_median_m": 7.5,
    "width_p10_m": 4.5,
    "width_min_m": 3.0,
    "width_max_m": 12.0,
    "bounded_share": 0.656,
    "unbounded_share": 0.344,
    "confidence_median": 1.0,
    "width_median_bounded_m": 6.25,
    "window_m": [
     737.0,
     762.0
    ],
    "width_at_max25_m": 7.5,
    "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": "Teviot Valley Community",
  "county": "Otago",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}