{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (49.4277, 1.3647)",
 "slug": "discovered-lane-49-4277-1-3647",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 45.88027062236293,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 252.0,
   "end_distance_m": 254.0,
   "start_elevation_m": 90.67957461950883,
   "end_elevation_m": 91.59718003195609,
   "min_gradient_pct": -7.083507215476459
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.250183081242916,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 251.0,
   "end_distance_m": 254.0,
   "start_elevation_m": 90.5096745395188,
   "end_elevation_m": 91.59718003195609,
   "min_gradient_pct": -3.4654405011295353
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.72921365891483,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 178.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 79.20123965047253,
   "end_elevation_m": 80.53770033341827,
   "min_gradient_pct": -0.7055258043718027
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.79507878073221,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 173.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 78.05819245534505,
   "end_elevation_m": 80.53770033341827,
   "min_gradient_pct": 3.058904417774926
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.14477479636784,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 170.0,
   "end_distance_m": 190.0,
   "start_elevation_m": 77.47450255183708,
   "end_elevation_m": 81.90345751111064,
   "min_gradient_pct": 3.521244046359513
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.671851273164975,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 165.0,
   "end_distance_m": 190.0,
   "start_elevation_m": 76.7354946928194,
   "end_elevation_m": 81.90345751111064,
   "min_gradient_pct": 3.7298741950062038
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.7954521190332,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 169.0,
   "end_distance_m": 219.0,
   "start_elevation_m": 77.30648564410643,
   "end_elevation_m": 86.20421170362303,
   "min_gradient_pct": 5.787089989362016
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.128267668976875,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 154.0,
   "end_distance_m": 254.0,
   "start_elevation_m": 75.46891236297921,
   "end_elevation_m": 91.59718003195609,
   "min_gradient_pct": 7.305128344124639
  }
 ],
 "shape": {
  "ascent_concentration": 0.331,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 142.0,
  "shape_class": "sustained"
 },
 "length_m": 563.7661393503506,
 "start_elevation_m": 58.41030196081197,
 "end_elevation_m": 124.37729648181366,
 "endpoint_gain_m": 65.96699452100168,
 "overall_gradient_pct": 11.701127456327544,
 "accumulated_ascent_m": 66.32540539958086,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.72921365891483,
   "start_distance_m": 178.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 180.5,
   "start_elevation_m": 79.20123965047253,
   "end_elevation_m": 80.53770033341827,
   "start_xy": [
    581333.1257553089,
    6926603.650008382
   ],
   "end_xy": [
    581333.0194179735,
    6926608.648877492
   ]
  },
  "max_10m": {
   "gradient_pct": 24.79507878073221,
   "start_distance_m": 173.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 178.0,
   "start_elevation_m": 78.05819245534505,
   "end_elevation_m": 80.53770033341827,
   "start_xy": [
    581334.5164582132,
    6926599.039075636
   ],
   "end_xy": [
    581333.0194179735,
    6926608.648877492
   ]
  },
  "max_20m": {
   "gradient_pct": 22.14477479636784,
   "start_distance_m": 170.0,
   "end_distance_m": 190.0,
   "midpoint_distance_m": 180.0,
   "start_elevation_m": 77.47450255183708,
   "end_elevation_m": 81.90345751111064,
   "start_xy": [
    581336.1237062,
    6926596.505944391
   ],
   "end_xy": [
    581332.8705457039,
    6926615.647294245
   ]
  },
  "max_25m": {
   "gradient_pct": 20.671851273164975,
   "start_distance_m": 165.0,
   "end_distance_m": 190.0,
   "midpoint_distance_m": 177.5,
   "start_elevation_m": 76.7354946928194,
   "end_elevation_m": 81.90345751111064,
   "start_xy": [
    581338.8407388896,
    6926592.333324687
   ],
   "end_xy": [
    581332.8705457039,
    6926615.647294245
   ]
  },
  "max_50m": {
   "gradient_pct": 17.7954521190332,
   "start_distance_m": 169.0,
   "end_distance_m": 219.0,
   "midpoint_distance_m": 194.0,
   "start_elevation_m": 77.30648564410643,
   "end_elevation_m": 86.20421170362303,
   "start_xy": [
    581336.659455529,
    6926595.661567308
   ],
   "end_xy": [
    581326.711732927,
    6926643.361181906
   ]
  },
  "max_100m": {
   "gradient_pct": 16.128267668976875,
   "start_distance_m": 154.0,
   "end_distance_m": 254.0,
   "midpoint_distance_m": 204.0,
   "start_elevation_m": 75.46891236297921,
   "end_elevation_m": 91.59718003195609,
   "start_xy": [
    581349.2964885356,
    6926588.916118322
   ],
   "end_xy": [
    581311.7400205665,
    6926674.993747822
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.7055258043718027,
   "start_distance_m": 431.0,
   "end_distance_m": 436.0,
   "midpoint_distance_m": 433.5,
   "start_elevation_m": 114.39930318334197,
   "end_elevation_m": 114.36402689312338,
   "start_xy": [
    581187.9653315386,
    6926796.955575286
   ],
   "end_xy": [
    581183.6231643236,
    6926799.429874037
   ]
  },
  "min_10m": {
   "gradient_pct": 3.058904417774926,
   "start_distance_m": 10.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 15.0,
   "start_elevation_m": 58.82611565454803,
   "end_elevation_m": 59.132006096325526,
   "start_xy": [
    581407.9475654757,
    6926499.726078068
   ],
   "end_xy": [
    581411.7761309515,
    6926508.964156137
   ]
  },
  "min_20m": {
   "gradient_pct": 3.521244046359513,
   "start_distance_m": 2.0,
   "end_distance_m": 22.0,
   "midpoint_distance_m": 12.0,
   "start_elevation_m": 58.50142029851193,
   "end_elevation_m": 59.205669107783834,
   "start_xy": [
    581404.8847130951,
    6926492.3356156135
   ],
   "end_xy": [
    581412.5418440467,
    6926510.81177175
   ]
  },
  "min_25m": {
   "gradient_pct": 3.7298741950062038,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 58.41030196081197,
   "end_elevation_m": 59.34277050956352,
   "start_xy": [
    581404.119,
    6926490.488
   ],
   "end_xy": [
    581413.6904136894,
    6926513.583195171
   ]
  },
  "min_50m": {
   "gradient_pct": 5.787089989362016,
   "start_distance_m": 513.0,
   "end_distance_m": 563.0,
   "midpoint_distance_m": 538.0,
   "start_elevation_m": 121.42586003321748,
   "end_elevation_m": 124.31940502789848,
   "start_xy": [
    581122.0520951822,
    6926844.416646056
   ],
   "end_xy": [
    581082.3592189036,
    6926873.831478019
   ]
  },
  "min_100m": {
   "gradient_pct": 7.305128344124639,
   "start_distance_m": 463.0,
   "end_distance_m": 563.0,
   "midpoint_distance_m": 513.0,
   "start_elevation_m": 117.01427668377384,
   "end_elevation_m": 124.31940502789848,
   "start_xy": [
    581160.02054148,
    6926812.541555658
   ],
   "end_xy": [
    581082.3592189036,
    6926873.831478019
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 45.88027062236293,
   "start_distance_m": 252.0,
   "end_distance_m": 254.0,
   "midpoint_distance_m": 253.0,
   "start_elevation_m": 90.67957461950883,
   "end_elevation_m": 91.59718003195609,
   "start_xy": [
    581312.6308951402,
    6926673.203121536
   ],
   "end_xy": [
    581311.7400205665,
    6926674.993747822
   ]
  },
  "max_3m": {
   "gradient_pct": 36.250183081242916,
   "start_distance_m": 251.0,
   "end_distance_m": 254.0,
   "midpoint_distance_m": 252.5,
   "start_elevation_m": 90.5096745395188,
   "end_elevation_m": 91.59718003195609,
   "start_xy": [
    581313.0763324272,
    6926672.307808394
   ],
   "end_xy": [
    581311.7400205665,
    6926674.993747822
   ]
  }
 },
 "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": 0.547,
   "obstruction_max_height_m": 23.8,
   "flagged_windows_m": [
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "c9b3ba49b3766035839a1a4ced518ccf9fed0cf5",
   "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": "fr-no8",
   "road_pbf": "block-batch-fr-no8.osm.pbf",
   "region_key": "france",
   "crs": "EPSG:2154",
   "elevation_provider_key": "ign-lidarhd",
   "tile_index": "wms-grid",
   "authority": "bdtopo",
   "registry_pbf": "france-vosges-2026-09-16.osm.pbf",
   "tile_index_snapshot": "sha256:396cc16291f947a7"
  },
  "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:2154",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
   "data/cache/fr/ign-lidarhd_dtm_E581-N6926_0m5@22LHD1ID-2024-11-26.tif"
  ],
  "calculated_at": "2026-09-26T00:55:32+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-no8.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-no8",
  "elevation_provider": "IGN LiDAR HD MNT 0.5 m",
  "elevation_licence": "Licence Ouverte / Open Licence 2.0 (Etalab) \u2014 \u00a9 IGN, LiDAR HD (MNT/MNS), data.geopf.fr; reproduction autoris\u00e9e avec mention de la source et de la date",
  "elevation_dataset": "LiDAR HD \u2014 MNT (sol) et MNS (surface), 0,50 m (Institut national de l'information g\u00e9ographique et foresti\u00e8re), RGF93 / Lambert-93 EPSG:2154, altitudes IGN69",
  "elevation_vertical_datum": "IGN69",
  "elevation_tile_ids": [
   "E581-N6926"
  ],
  "elevation_blocks": [
   "22LHD1ID@2024-11-26"
  ],
  "ign_dalles": [
   "LHD_FXX_0581_6927_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD1ID"
  ],
  "ign_editions": [
   "2024-11-26"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0581_6927_MNT_O_0M50_LAMB93_IGN69": "2024-11-26"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 28,
   "stations_resolved": 28,
   "width_median_m": 6.0,
   "width_p10_m": 2.92,
   "width_min_m": 2.25,
   "width_max_m": 12.0,
   "bounded_share": 0.143,
   "unbounded_share": 0.857,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.75,
   "window_m": [
    165.0,
    190.0
   ],
   "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": 28,
    "stations_resolved": 28,
    "width_median_m": 2.62,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.821,
    "unbounded_share": 0.179,
    "confidence_median": 1.0,
    "width_median_bounded_m": 1.75,
    "window_m": [
     165.0,
     190.0
    ],
    "width_at_max25_m": 4.38,
    "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": "Perruel",
  "county": "Eure",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}