{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (43.1374, 5.8194)",
 "slug": "discovered-lane-43-1374-5-8194",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 51.31503523313157,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 225.0,
   "end_distance_m": 227.0,
   "start_elevation_m": 98.97714783948491,
   "end_elevation_m": 100.00344854414755,
   "min_gradient_pct": 0.605381431931562
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 46.147121151677574,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 224.0,
   "end_distance_m": 227.0,
   "start_elevation_m": 98.61903490959722,
   "end_elevation_m": 100.00344854414755,
   "min_gradient_pct": 2.262271063576312
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.32465352917245,
   "diagnostic": false,
   "flags": [
    "suppression_unstable",
    "canopy_or_structure"
   ],
   "start_distance_m": 223.0,
   "end_distance_m": 228.0,
   "start_elevation_m": 98.58210894213548,
   "end_elevation_m": 100.1983416185941,
   "min_gradient_pct": 2.3936022304121707
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.705598708225693,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 166.0,
   "end_distance_m": 176.0,
   "start_elevation_m": 86.41368968219085,
   "end_elevation_m": 89.38424955301342,
   "min_gradient_pct": 3.011996842649296
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 27.963432744253613,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 160.0,
   "end_distance_m": 180.0,
   "start_elevation_m": 84.86967881512984,
   "end_elevation_m": 90.46236536398057,
   "min_gradient_pct": 3.563201001070553
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 27.790140455814306,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 148.0,
   "end_distance_m": 173.0,
   "start_elevation_m": 81.60955898086286,
   "end_elevation_m": 88.55709409481643,
   "min_gradient_pct": 4.183893406831828
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 25.459622122597153,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 139.0,
   "end_distance_m": 189.0,
   "start_elevation_m": 79.46440516586293,
   "end_elevation_m": 92.1942162271615,
   "min_gradient_pct": 6.58848561604583
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.58831345760015,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 136.0,
   "end_distance_m": 236.0,
   "start_elevation_m": 79.04417892209088,
   "end_elevation_m": 101.63249237969103,
   "min_gradient_pct": 10.978715585516992
  }
 ],
 "shape": {
  "ascent_concentration": 0.374,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 132.0,
  "shape_class": "sustained"
 },
 "length_m": 260.79587617731227,
 "start_elevation_m": 64.14309003097691,
 "end_elevation_m": 105.50429389966322,
 "endpoint_gain_m": 41.36120386868632,
 "overall_gradient_pct": 15.859608086964261,
 "accumulated_ascent_m": 41.40758699026206,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.32465352917245,
   "start_distance_m": 223.0,
   "end_distance_m": 228.0,
   "midpoint_distance_m": 225.5,
   "start_elevation_m": 98.58210894213548,
   "end_elevation_m": 100.1983416185941,
   "start_xy": [
    929469.2790835125,
    6230622.158353848
   ],
   "end_xy": [
    929470.656304337,
    6230626.57063262
   ]
  },
  "max_10m": {
   "gradient_pct": 29.705598708225693,
   "start_distance_m": 166.0,
   "end_distance_m": 176.0,
   "midpoint_distance_m": 171.0,
   "start_elevation_m": 86.41368968219085,
   "end_elevation_m": 89.38424955301342,
   "start_xy": [
    929502.5048338493,
    6230582.255427378
   ],
   "end_xy": [
    929501.6252884709,
    6230592.216672277
   ]
  },
  "max_20m": {
   "gradient_pct": 27.963432744253613,
   "start_distance_m": 160.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 170.0,
   "start_elevation_m": 84.86967881512984,
   "end_elevation_m": 90.46236536398057,
   "start_xy": [
    929503.0325610763,
    6230576.27868044
   ],
   "end_xy": [
    929501.2734703195,
    6230596.201170237
   ]
  },
  "max_25m": {
   "gradient_pct": 27.790140455814306,
   "start_distance_m": 148.0,
   "end_distance_m": 173.0,
   "midpoint_distance_m": 160.5,
   "start_elevation_m": 81.60955898086286,
   "end_elevation_m": 88.55709409481643,
   "start_xy": [
    929504.0880155305,
    6230564.325186562
   ],
   "end_xy": [
    929501.8891520844,
    6230589.2282988075
   ]
  },
  "max_50m": {
   "gradient_pct": 25.459622122597153,
   "start_distance_m": 139.0,
   "end_distance_m": 189.0,
   "midpoint_distance_m": 164.0,
   "start_elevation_m": 79.46440516586293,
   "end_elevation_m": 92.1942162271615,
   "start_xy": [
    929502.4528772447,
    6230555.874968706
   ],
   "end_xy": [
    929494.6423578494,
    6230601.130818682
   ]
  },
  "max_100m": {
   "gradient_pct": 22.58831345760015,
   "start_distance_m": 136.0,
   "end_distance_m": 236.0,
   "midpoint_distance_m": 186.0,
   "start_elevation_m": 79.04417892209088,
   "end_elevation_m": 101.63249237969103,
   "start_xy": [
    929500.6334616892,
    6230553.631962622
   ],
   "end_xy": [
    929475.4957225142,
    6230632.736789539
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 2.3936022304121707,
   "start_distance_m": 92.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 94.5,
   "start_elevation_m": 76.27258056573534,
   "end_elevation_m": 76.39226067725595,
   "start_xy": [
    929457.2888912788,
    6230554.504396663
   ],
   "end_xy": [
    929462.2592838093,
    6230553.961075311
   ]
  },
  "min_10m": {
   "gradient_pct": 3.011996842649296,
   "start_distance_m": 92.0,
   "end_distance_m": 102.0,
   "midpoint_distance_m": 97.0,
   "start_elevation_m": 76.27258056573534,
   "end_elevation_m": 76.57378025000027,
   "start_xy": [
    929457.2888912788,
    6230554.504396663
   ],
   "end_xy": [
    929467.2296763399,
    6230553.417753957
   ]
  },
  "min_20m": {
   "gradient_pct": 3.563201001070553,
   "start_distance_m": 90.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 100.0,
   "start_elevation_m": 76.1706312584138,
   "end_elevation_m": 76.88327145862792,
   "start_xy": [
    929455.3822267499,
    6230554.170485285
   ],
   "end_xy": [
    929475.1823043887,
    6230552.548439793
   ]
  },
  "min_25m": {
   "gradient_pct": 4.183893406831828,
   "start_distance_m": 90.0,
   "end_distance_m": 115.0,
   "midpoint_distance_m": 102.5,
   "start_elevation_m": 76.1706312584138,
   "end_elevation_m": 77.21660461012176,
   "start_xy": [
    929455.3822267499,
    6230554.170485285
   ],
   "end_xy": [
    929480.1608336299,
    6230552.113559116
   ]
  },
  "min_50m": {
   "gradient_pct": 6.58848561604583,
   "start_distance_m": 85.0,
   "end_distance_m": 135.0,
   "midpoint_distance_m": 110.0,
   "start_elevation_m": 75.64011630962875,
   "end_elevation_m": 78.93435911765167,
   "start_xy": [
    929450.7816528108,
    6230552.212241319
   ],
   "end_xy": [
    929499.7389304063,
    6230553.1849572705
   ]
  },
  "min_100m": {
   "gradient_pct": 10.978715585516992,
   "start_distance_m": 36.0,
   "end_distance_m": 136.0,
   "midpoint_distance_m": 86.0,
   "start_elevation_m": 68.06546333657388,
   "end_elevation_m": 79.04417892209088,
   "start_xy": [
    929443.577844884,
    6230503.980200309
   ],
   "end_xy": [
    929500.6334616892,
    6230553.631962622
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 51.31503523313157,
   "start_distance_m": 225.0,
   "end_distance_m": 227.0,
   "midpoint_distance_m": 226.0,
   "start_elevation_m": 98.97714783948491,
   "end_elevation_m": 100.00344854414755,
   "start_xy": [
    929469.3781423137,
    6230623.862257079
   ],
   "end_xy": [
    929470.1658450009,
    6230625.70060538
   ]
  },
  "max_3m": {
   "gradient_pct": 46.147121151677574,
   "start_distance_m": 224.0,
   "end_distance_m": 227.0,
   "midpoint_distance_m": 225.5,
   "start_elevation_m": 98.61903490959722,
   "end_elevation_m": 100.00344854414755,
   "start_xy": [
    929468.9842909701,
    6230622.943082929
   ],
   "end_xy": [
    929470.1658450009,
    6230625.70060538
   ]
  }
 },
 "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_windows": {
   "rounds": 0,
   "windows_masked": [],
   "advisory": [],
   "unresolved": [],
   "unstable": [
    {
     "window_m": 5.0,
     "start_m": 223.0,
     "end_m": 228.0,
     "raw_pct": 32.32,
     "reason": "short-step",
     "perturbations": [
      "phase+0.000/mask+0",
      "phase+0.333/mask+1",
      "phase+0.667/mask-1"
     ],
     "perturbation_reasons": [
      "short-step",
      "short-step",
      ""
     ]
    }
   ]
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.214,
   "obstruction_max_height_m": 14.69,
   "flagged_windows_m": [
    2,
    3,
    5.0,
    20,
    25,
    50
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "41205ec4649bb0a4093af76ff34281a5d9a13832",
   "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-pr5",
   "road_pbf": "block-batch-fr-pr5.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:ba95a0bf562c86eb"
  },
  "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_E929-N6230_0m5@21LHD7PQ-2025-03-14.tif"
  ],
  "calculated_at": "2026-09-25T08:51:40+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pr5.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pr5",
  "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": [
   "E929-N6230"
  ],
  "elevation_blocks": [
   "21LHD7PQ@2025-03-14"
  ],
  "ign_dalles": [
   "LHD_FXX_0929_6231_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD7PQ"
  ],
  "ign_editions": [
   "2025-03-14"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0929_6231_MNT_O_0M50_LAMB93_IGN69": "2025-03-14"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "suppression_unstable": [
   5.0
  ],
  "carriageway": {
   "stations": 17,
   "stations_resolved": 17,
   "width_median_m": 4.25,
   "width_p10_m": 1.9,
   "width_min_m": 0.5,
   "width_max_m": 12.0,
   "bounded_share": 0.294,
   "unbounded_share": 0.706,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.25,
   "window_m": [
    148.0,
    173.0
   ],
   "width_at_max25_m": 2.5,
   "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": 17,
    "stations_resolved": 17,
    "width_median_m": 3.25,
    "width_p10_m": 1.0,
    "width_min_m": 0.75,
    "width_max_m": 12.0,
    "bounded_share": 0.824,
    "unbounded_share": 0.176,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.12,
    "window_m": [
     148.0,
     173.0
    ],
    "width_at_max25_m": 2.25,
    "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": "Sanary-sur-Mer",
  "county": "Var",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}