{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (-35.4880, 174.4525)",
 "slug": "discovered-lane-35-4880-174-4525",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.47669081836999,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 250.0,
   "end_distance_m": 252.0,
   "start_elevation_m": 53.09324767638574,
   "end_elevation_m": 53.682781492753136,
   "min_gradient_pct": -18.108003986122156
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.683312580725982,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 237.0,
   "end_distance_m": 240.0,
   "start_elevation_m": 50.85453776211493,
   "end_elevation_m": 51.65503713953671,
   "min_gradient_pct": -13.132551752957985
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.979456778670567,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 267.0,
   "end_distance_m": 272.0,
   "start_elevation_m": 55.95856789566139,
   "end_elevation_m": 57.15754073459492,
   "min_gradient_pct": -11.990985707540176
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.259861821988935,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 285.0,
   "end_distance_m": 295.0,
   "start_elevation_m": 59.598849167563536,
   "end_elevation_m": 61.72483534976243,
   "min_gradient_pct": -7.087637357522709
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.667363021257827,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 278.0,
   "end_distance_m": 298.0,
   "start_elevation_m": 58.14756698690848,
   "end_elevation_m": 62.281039591160045,
   "min_gradient_pct": -3.249382175767508
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.59261096680237,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 266.0,
   "end_distance_m": 291.0,
   "start_elevation_m": 55.7365992522545,
   "end_elevation_m": 60.88475199395509,
   "min_gradient_pct": -2.7083717393064717
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.04711785200982,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 250.0,
   "end_distance_m": 300.0,
   "start_elevation_m": 53.09324767638574,
   "end_elevation_m": 62.616806602390646,
   "min_gradient_pct": -1.7417222554051364
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.394569078152614,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 233.0,
   "end_distance_m": 333.0,
   "start_elevation_m": 50.25625612280491,
   "end_elevation_m": 66.65082520095753,
   "min_gradient_pct": -0.8710398411286278
  }
 ],
 "shape": {
  "ascent_concentration": 0.58,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 114.0,
  "shape_class": "stepped"
 },
 "length_m": 499.56194323728454,
 "start_elevation_m": 44.88557943355089,
 "end_elevation_m": 73.8511544785195,
 "endpoint_gain_m": 28.965575044968617,
 "overall_gradient_pct": 5.798194885956394,
 "accumulated_ascent_m": 32.610407905369094,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.979456778670567,
   "start_distance_m": 267.0,
   "end_distance_m": 272.0,
   "midpoint_distance_m": 269.5,
   "start_elevation_m": 55.95856789566139,
   "end_elevation_m": 57.15754073459492,
   "start_xy": [
    1731734.1778712068,
    6071811.79576887
   ],
   "end_xy": [
    1731732.4469217884,
    6071807.104946542
   ]
  },
  "max_10m": {
   "gradient_pct": 21.259861821988935,
   "start_distance_m": 285.0,
   "end_distance_m": 295.0,
   "midpoint_distance_m": 290.0,
   "start_elevation_m": 59.598849167563536,
   "end_elevation_m": 61.72483534976243,
   "start_xy": [
    1731729.715916671,
    6071794.455685896
   ],
   "end_xy": [
    1731728.242529544,
    6071784.564824943
   ]
  },
  "max_20m": {
   "gradient_pct": 20.667363021257827,
   "start_distance_m": 278.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 288.0,
   "start_elevation_m": 58.14756698690848,
   "end_elevation_m": 62.281039591160045,
   "start_xy": [
    1731730.74728766,
    6071801.379288562
   ],
   "end_xy": [
    1731727.6407676532,
    6071781.631018418
   ]
  },
  "max_25m": {
   "gradient_pct": 20.59261096680237,
   "start_distance_m": 266.0,
   "end_distance_m": 291.0,
   "midpoint_distance_m": 278.5,
   "start_elevation_m": 55.7365992522545,
   "end_elevation_m": 60.88475199395509,
   "start_xy": [
    1731734.5240610905,
    6071812.733933335
   ],
   "end_xy": [
    1731728.8318843949,
    6071788.521169324
   ]
  },
  "max_50m": {
   "gradient_pct": 19.04711785200982,
   "start_distance_m": 250.0,
   "end_distance_m": 300.0,
   "midpoint_distance_m": 275.0,
   "start_elevation_m": 53.09324767638574,
   "end_elevation_m": 62.616806602390646,
   "start_xy": [
    1731740.0630992295,
    6071827.744564784
   ],
   "end_xy": [
    1731727.117007317,
    6071779.700817623
   ]
  },
  "max_100m": {
   "gradient_pct": 16.394569078152614,
   "start_distance_m": 233.0,
   "end_distance_m": 333.0,
   "midpoint_distance_m": 283.0,
   "start_elevation_m": 50.25625612280491,
   "end_elevation_m": 66.65082520095753,
   "start_xy": [
    1731745.9483272522,
    6071843.693360698
   ],
   "end_xy": [
    1731716.0855703643,
    6071748.686544367
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.990985707540176,
   "start_distance_m": 442.0,
   "end_distance_m": 447.0,
   "midpoint_distance_m": 444.5,
   "start_elevation_m": 74.64663372616891,
   "end_elevation_m": 74.0470844407919,
   "start_xy": [
    1731623.3318001218,
    6071696.583069688
   ],
   "end_xy": [
    1731618.482485457,
    6071695.36773437
   ]
  },
  "min_10m": {
   "gradient_pct": -7.087637357522709,
   "start_distance_m": 442.0,
   "end_distance_m": 452.0,
   "midpoint_distance_m": 447.0,
   "start_elevation_m": 74.64663372616891,
   "end_elevation_m": 73.93786999041664,
   "start_xy": [
    1731623.3318001218,
    6071696.583069688
   ],
   "end_xy": [
    1731613.6305018116,
    6071694.160152197
   ]
  },
  "min_20m": {
   "gradient_pct": -3.249382175767508,
   "start_distance_m": 442.0,
   "end_distance_m": 462.0,
   "midpoint_distance_m": 452.0,
   "start_elevation_m": 74.64663372616891,
   "end_elevation_m": 73.99675729101541,
   "start_xy": [
    1731623.3318001218,
    6071696.583069688
   ],
   "end_xy": [
    1731603.809835245,
    6071693.051328066
   ]
  },
  "min_25m": {
   "gradient_pct": -2.7083717393064717,
   "start_distance_m": 50.0,
   "end_distance_m": 75.0,
   "midpoint_distance_m": 62.5,
   "start_elevation_m": 45.44735082877435,
   "end_elevation_m": 44.77025789394773,
   "start_xy": [
    1731833.6559033338,
    6072000.470193946
   ],
   "end_xy": [
    1731820.1960348156,
    6071979.651381846
   ]
  },
  "min_50m": {
   "gradient_pct": -1.7417222554051364,
   "start_distance_m": 442.0,
   "end_distance_m": 492.0,
   "midpoint_distance_m": 467.0,
   "start_elevation_m": 74.64663372616891,
   "end_elevation_m": 73.77577259846635,
   "start_xy": [
    1731623.3318001218,
    6071696.583069688
   ],
   "end_xy": [
    1731574.0886843423,
    6071696.672443778
   ]
  },
  "min_100m": {
   "gradient_pct": -0.8710398411286278,
   "start_distance_m": 12.0,
   "end_distance_m": 112.0,
   "midpoint_distance_m": 62.0,
   "start_elevation_m": 45.47505305739997,
   "end_elevation_m": 44.60401321627134,
   "start_xy": [
    1731848.3921925684,
    6072035.3118880885
   ],
   "end_xy": [
    1731804.718661534,
    6071947.094879861
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.47669081836999,
   "start_distance_m": 250.0,
   "end_distance_m": 252.0,
   "midpoint_distance_m": 251.0,
   "start_elevation_m": 53.09324767638574,
   "end_elevation_m": 53.682781492753136,
   "start_xy": [
    1731740.0630992295,
    6071827.744564784
   ],
   "end_xy": [
    1731739.370719462,
    6071825.868235853
   ]
  },
  "max_3m": {
   "gradient_pct": 26.683312580725982,
   "start_distance_m": 237.0,
   "end_distance_m": 240.0,
   "midpoint_distance_m": 238.5,
   "start_elevation_m": 50.85453776211493,
   "end_elevation_m": 51.65503713953671,
   "start_xy": [
    1731744.5635677173,
    6071839.940702836
   ],
   "end_xy": [
    1731743.5249980662,
    6071837.12620944
   ]
  }
 },
 "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": 0.399,
   "obstruction_max_height_m": 12.95,
   "flagged_windows_m": [
    2,
    3,
    5,
    25,
    50,
    100
   ]
  },
  "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-n2",
   "road_pbf": "block-batch-nz-n2.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": "sha256:1ffe0b32a690b9c1"
  },
  "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/AW30.tiff",
   "data/cache/nz/AW31.tiff"
  ],
  "calculated_at": "2026-09-28T04:56:10+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-nz-n2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "nz-n2",
  "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": [
   "AW30",
   "AW31"
  ],
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 26,
   "stations_resolved": 26,
   "width_median_m": 4.25,
   "width_p10_m": 2.62,
   "width_min_m": 1.25,
   "width_max_m": 8.75,
   "bounded_share": 0.308,
   "unbounded_share": 0.692,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.12,
   "window_m": [
    266.0,
    291.0
   ],
   "width_at_max25_m": 5.5,
   "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": 26,
    "stations_resolved": 26,
    "width_median_m": 3.25,
    "width_p10_m": 1.38,
    "width_min_m": 0.75,
    "width_max_m": 9.5,
    "bounded_share": 0.769,
    "unbounded_share": 0.231,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.5,
    "window_m": [
     266.0,
     291.0
    ],
    "width_at_max25_m": 8.5,
    "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": "Northland",
  "county": "Northland",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}