{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (-41.2172, 173.4010)",
 "slug": "discovered-lane-41-2172-173-4010",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.72079900118203,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 402.0,
   "end_distance_m": 404.0,
   "start_elevation_m": 81.99183704626878,
   "end_elevation_m": 82.58625302629243,
   "min_gradient_pct": -13.898586776036836
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.690247344544655,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 401.0,
   "end_distance_m": 404.0,
   "start_elevation_m": 81.72554560595609,
   "end_elevation_m": 82.58625302629243,
   "min_gradient_pct": -13.272362520488912
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.197961717833095,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 398.0,
   "end_distance_m": 403.0,
   "start_elevation_m": 80.9070934108376,
   "end_elevation_m": 82.31699149672926,
   "min_gradient_pct": -12.669270078924058
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.652782149625637,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 393.0,
   "end_distance_m": 403.0,
   "start_elevation_m": 79.5517132817667,
   "end_elevation_m": 82.31699149672926,
   "min_gradient_pct": -12.256839557297354
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 27.315276885804348,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 394.0,
   "end_distance_m": 414.0,
   "start_elevation_m": 79.83676729806906,
   "end_elevation_m": 85.29982267522993,
   "min_gradient_pct": -11.315282022629702
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 26.944686646166247,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 389.0,
   "end_distance_m": 414.0,
   "start_elevation_m": 78.56365101368837,
   "end_elevation_m": 85.29982267522993,
   "min_gradient_pct": -10.796848284356827
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 25.165748265827688,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 370.0,
   "end_distance_m": 420.0,
   "start_elevation_m": 74.06901422573335,
   "end_elevation_m": 86.6518883586472,
   "min_gradient_pct": -7.417515403507565
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.533136553953227,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 341.0,
   "end_distance_m": 441.0,
   "start_elevation_m": 68.31282057714861,
   "end_elevation_m": 90.84595713110184,
   "min_gradient_pct": -1.8722896559152389
  }
 ],
 "shape": {
  "ascent_concentration": 0.404,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 304.0,
  "shape_class": "sustained"
 },
 "length_m": 827.7000000000945,
 "start_elevation_m": 38.81988989529379,
 "end_elevation_m": 131.56929681494427,
 "endpoint_gain_m": 92.74940691965048,
 "overall_gradient_pct": 11.20567922189681,
 "accumulated_ascent_m": 97.22510418920668,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.197961717833095,
   "start_distance_m": 398.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 400.5,
   "start_elevation_m": 80.9070934108376,
   "end_elevation_m": 82.31699149672926,
   "start_xy": [
    1633513.8026840198,
    5437112.2269313
   ],
   "end_xy": [
    1633517.2074768476,
    5437108.565321572
   ]
  },
  "max_10m": {
   "gradient_pct": 27.652782149625637,
   "start_distance_m": 393.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 398.0,
   "start_elevation_m": 79.5517132817667,
   "end_elevation_m": 82.31699149672926,
   "start_xy": [
    1633510.397891192,
    5437115.888541028
   ],
   "end_xy": [
    1633517.2074768476,
    5437108.565321572
   ]
  },
  "max_20m": {
   "gradient_pct": 27.315276885804348,
   "start_distance_m": 394.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 404.0,
   "start_elevation_m": 79.83676729806906,
   "end_elevation_m": 85.29982267522993,
   "start_xy": [
    1633511.0788497576,
    5437115.156219083
   ],
   "end_xy": [
    1633525.4459598914,
    5437101.397090429
   ]
  },
  "max_25m": {
   "gradient_pct": 26.944686646166247,
   "start_distance_m": 389.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 401.5,
   "start_elevation_m": 78.56365101368837,
   "end_elevation_m": 85.29982267522993,
   "start_xy": [
    1633507.6740569298,
    5437118.817828811
   ],
   "end_xy": [
    1633525.4459598914,
    5437101.397090429
   ]
  },
  "max_50m": {
   "gradient_pct": 25.165748265827688,
   "start_distance_m": 370.0,
   "end_distance_m": 420.0,
   "midpoint_distance_m": 395.0,
   "start_elevation_m": 74.06901422573335,
   "end_elevation_m": 86.6518883586472,
   "start_xy": [
    1633494.7358441844,
    5437132.731945777
   ],
   "end_xy": [
    1633530.4905326637,
    5437098.165823848
   ]
  },
  "max_100m": {
   "gradient_pct": 22.533136553953227,
   "start_distance_m": 341.0,
   "end_distance_m": 441.0,
   "midpoint_distance_m": 391.0,
   "start_elevation_m": 68.31282057714861,
   "end_elevation_m": 90.84595713110184,
   "start_xy": [
    1633476.4859581862,
    5437155.1540202955
   ],
   "end_xy": [
    1633551.1102653646,
    5437094.875207605
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.669270078924058,
   "start_distance_m": 669.0,
   "end_distance_m": 674.0,
   "midpoint_distance_m": 671.5,
   "start_elevation_m": 109.68857940565313,
   "end_elevation_m": 109.05511590170693,
   "start_xy": [
    1633685.3553653494,
    5436938.89241609
   ],
   "end_xy": [
    1633686.2738734263,
    5436933.9775058245
   ]
  },
  "min_10m": {
   "gradient_pct": -12.256839557297354,
   "start_distance_m": 665.0,
   "end_distance_m": 675.0,
   "midpoint_distance_m": 670.0,
   "start_elevation_m": 110.16251568885092,
   "end_elevation_m": 108.93683173312118,
   "start_xy": [
    1633684.620558888,
    5436942.824344302
   ],
   "end_xy": [
    1633686.4575750416,
    5436932.994523772
   ]
  },
  "min_20m": {
   "gradient_pct": -11.315282022629702,
   "start_distance_m": 660.0,
   "end_distance_m": 680.0,
   "midpoint_distance_m": 670.0,
   "start_elevation_m": 110.6561077608691,
   "end_elevation_m": 108.39305135634316,
   "start_xy": [
    1633683.0101859823,
    5436947.54546494
   ],
   "end_xy": [
    1633687.3760831184,
    5436928.079613507
   ]
  },
  "min_25m": {
   "gradient_pct": -10.796848284356827,
   "start_distance_m": 655.0,
   "end_distance_m": 680.0,
   "midpoint_distance_m": 667.5,
   "start_elevation_m": 111.09226342743237,
   "end_elevation_m": 108.39305135634316,
   "start_xy": [
    1633681.2420434079,
    5436952.222394685
   ],
   "end_xy": [
    1633687.3760831184,
    5436928.079613507
   ]
  },
  "min_50m": {
   "gradient_pct": -7.417515403507565,
   "start_distance_m": 635.0,
   "end_distance_m": 685.0,
   "midpoint_distance_m": 660.0,
   "start_elevation_m": 111.84261218710485,
   "end_elevation_m": 108.13385448535107,
   "start_xy": [
    1633667.7699442774,
    5436966.473825317
   ],
   "end_xy": [
    1633688.5286961761,
    5436923.214689644
   ]
  },
  "min_100m": {
   "gradient_pct": -1.8722896559152389,
   "start_distance_m": 591.0,
   "end_distance_m": 691.0,
   "midpoint_distance_m": 641.0,
   "start_elevation_m": 110.1747146705541,
   "end_elevation_m": 108.30242501463886,
   "start_xy": [
    1633646.79013156,
    5437003.258111601
   ],
   "end_xy": [
    1633691.0895826118,
    5436918.016672388
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.72079900118203,
   "start_distance_m": 402.0,
   "end_distance_m": 404.0,
   "midpoint_distance_m": 403.0,
   "start_elevation_m": 81.99183704626878,
   "end_elevation_m": 82.58625302629243,
   "start_xy": [
    1633516.526518282,
    5437109.297643518
   ],
   "end_xy": [
    1633517.8884354131,
    5437107.832999626
   ]
  },
  "max_3m": {
   "gradient_pct": 28.690247344544655,
   "start_distance_m": 401.0,
   "end_distance_m": 404.0,
   "midpoint_distance_m": 402.5,
   "start_elevation_m": 81.72554560595609,
   "end_elevation_m": 82.58625302629243,
   "start_xy": [
    1633515.8455597165,
    5437110.029965463
   ],
   "end_xy": [
    1633517.8884354131,
    5437107.832999626
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.037,
   "windows_resited": [],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.531,
   "obstruction_max_height_m": 26.54,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    120.0,
    150.0
   ]
  ],
  "review": [],
  "extent": [
   "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/BQ26.tiff"
  ],
  "calculated_at": "2026-09-28T05:26:15+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": [
   "BQ26"
  ],
  "route_cut_m": 827.7,
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 40,
   "stations_resolved": 40,
   "width_median_m": 4.75,
   "width_p10_m": 3.48,
   "width_min_m": 2.0,
   "width_max_m": 9.5,
   "bounded_share": 0.125,
   "unbounded_share": 0.875,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.25,
   "window_m": [
    389.0,
    414.0
   ],
   "width_at_max25_m": 6.0,
   "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": 40,
    "stations_resolved": 40,
    "width_median_m": 1.5,
    "width_p10_m": 0.98,
    "width_min_m": 0.5,
    "width_max_m": 9.5,
    "bounded_share": 0.95,
    "unbounded_share": 0.05,
    "confidence_median": 1.0,
    "width_median_bounded_m": 1.5,
    "window_m": [
     389.0,
     414.0
    ],
    "width_at_max25_m": 1.25,
    "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": "Nelson",
  "county": "Nelson",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}