{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.9934, 2.5379)",
 "slug": "discovered-lane-44-9934-2-5379",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.893220212962433,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 287.0,
   "end_distance_m": 289.0,
   "start_elevation_m": 744.5980919474979,
   "end_elevation_m": 745.1559563517571,
   "min_gradient_pct": -31.120759788598207,
   "suppressed_max_gradient_pct": 48.57953029361397,
   "suppressed_location_m": [
    2119.0,
    2121.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.506715323355973,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 287.0,
   "end_distance_m": 290.0,
   "start_elevation_m": 744.5980919474979,
   "end_elevation_m": 745.4232934071986,
   "min_gradient_pct": -23.43772203539629,
   "suppressed_max_gradient_pct": 37.96246373092723,
   "suppressed_location_m": [
    2119.0,
    2122.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.649434988839857,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 287.0,
   "end_distance_m": 292.0,
   "start_elevation_m": 744.5980919474979,
   "end_elevation_m": 745.9305636969399,
   "min_gradient_pct": -16.863458128011644
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.189730482029745,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 373.0,
   "end_distance_m": 383.0,
   "start_elevation_m": 761.3534667999565,
   "end_elevation_m": 763.9724398481595,
   "min_gradient_pct": -15.352175565736843
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.8471195660278,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 370.0,
   "end_distance_m": 390.0,
   "start_elevation_m": 760.6460814618288,
   "end_elevation_m": 765.6155053750343,
   "min_gradient_pct": -10.990000116802321
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.334473555924887,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 366.0,
   "end_distance_m": 391.0,
   "start_elevation_m": 759.7521047451139,
   "end_elevation_m": 765.8357231340951,
   "min_gradient_pct": -9.965978678733336
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.17947430667914,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 356.0,
   "end_distance_m": 406.0,
   "start_elevation_m": 757.7415736555804,
   "end_elevation_m": 768.83131080892,
   "min_gradient_pct": -6.878941008423453
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.31866105042002,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 287.0,
   "end_distance_m": 387.0,
   "start_elevation_m": 744.5980919474979,
   "end_elevation_m": 764.9167529979179,
   "min_gradient_pct": -3.6876388345212945
  }
 ],
 "shape": {
  "ascent_concentration": 0.45,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 396.0,
  "shape_class": "sustained"
 },
 "length_m": 2475.9369072651025,
 "start_elevation_m": 701.1039585717956,
 "end_elevation_m": 929.5527765722653,
 "endpoint_gain_m": 228.4488180004697,
 "overall_gradient_pct": 9.226762496658779,
 "accumulated_ascent_m": 240.79018212199765,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.649434988839857,
   "start_distance_m": 287.0,
   "end_distance_m": 292.0,
   "midpoint_distance_m": 289.5,
   "start_elevation_m": 744.5980919474979,
   "end_elevation_m": 745.9305636969399,
   "start_xy": [
    663747.5156632425,
    6432514.949340893
   ],
   "end_xy": [
    663742.7472122613,
    6432516.453294097
   ]
  },
  "max_10m": {
   "gradient_pct": 26.189730482029745,
   "start_distance_m": 373.0,
   "end_distance_m": 383.0,
   "midpoint_distance_m": 378.0,
   "start_elevation_m": 761.3534667999565,
   "end_elevation_m": 763.9724398481595,
   "start_xy": [
    663701.542485848,
    6432462.349550615
   ],
   "end_xy": [
    663692.4917625188,
    6432458.096974077
   ]
  },
  "max_20m": {
   "gradient_pct": 24.8471195660278,
   "start_distance_m": 370.0,
   "end_distance_m": 390.0,
   "midpoint_distance_m": 380.0,
   "start_elevation_m": 760.6460814618288,
   "end_elevation_m": 765.6155053750343,
   "start_xy": [
    663704.2577028467,
    6432463.625323577
   ],
   "end_xy": [
    663686.1045791788,
    6432455.244277612
   ]
  },
  "max_25m": {
   "gradient_pct": 24.334473555924887,
   "start_distance_m": 366.0,
   "end_distance_m": 391.0,
   "midpoint_distance_m": 378.5,
   "start_elevation_m": 759.7521047451139,
   "end_elevation_m": 765.8357231340951,
   "start_xy": [
    663707.742404682,
    6432465.56096291
   ],
   "end_xy": [
    663685.1651601274,
    6432454.901506777
   ]
  },
  "max_50m": {
   "gradient_pct": 22.17947430667914,
   "start_distance_m": 356.0,
   "end_distance_m": 406.0,
   "midpoint_distance_m": 381.0,
   "start_elevation_m": 757.7415736555804,
   "end_elevation_m": 768.83131080892,
   "start_xy": [
    663715.9456338496,
    6432471.27996905
   ],
   "end_xy": [
    663670.8661291801,
    6432450.661740458
   ]
  },
  "max_100m": {
   "gradient_pct": 20.31866105042002,
   "start_distance_m": 287.0,
   "end_distance_m": 387.0,
   "midpoint_distance_m": 337.0,
   "start_elevation_m": 744.5980919474979,
   "end_elevation_m": 764.9167529979179,
   "start_xy": [
    663747.5156632425,
    6432514.949340893
   ],
   "end_xy": [
    663688.8714731871,
    6432456.395943461
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -16.863458128011644,
   "start_distance_m": 2451.0,
   "end_distance_m": 2456.0,
   "midpoint_distance_m": 2453.5,
   "start_elevation_m": 931.8370576221438,
   "end_elevation_m": 930.9938847157432,
   "start_xy": [
    662575.1584748848,
    6433498.458855265
   ],
   "end_xy": [
    662571.7368821736,
    6433502.1047712425
   ]
  },
  "min_10m": {
   "gradient_pct": -15.352175565736843,
   "start_distance_m": 2451.0,
   "end_distance_m": 2461.0,
   "midpoint_distance_m": 2456.0,
   "start_elevation_m": 931.8370576221438,
   "end_elevation_m": 930.3018400655701,
   "start_xy": [
    662575.1584748848,
    6433498.458855265
   ],
   "end_xy": [
    662568.358832688,
    6433505.790549161
   ]
  },
  "min_20m": {
   "gradient_pct": -10.990000116802321,
   "start_distance_m": 2451.0,
   "end_distance_m": 2471.0,
   "midpoint_distance_m": 2461.0,
   "start_elevation_m": 931.8370576221438,
   "end_elevation_m": 929.6390575987833,
   "start_xy": [
    662575.1584748848,
    6433498.458855265
   ],
   "end_xy": [
    662561.6982619879,
    6433513.249557001
   ]
  },
  "min_25m": {
   "gradient_pct": -9.965978678733336,
   "start_distance_m": 2440.0,
   "end_distance_m": 2465.0,
   "midpoint_distance_m": 2452.5,
   "start_elevation_m": 932.371078724571,
   "end_elevation_m": 929.8795840548877,
   "start_xy": [
    662582.6859788495,
    6433490.437840113
   ],
   "end_xy": [
    662565.694604408,
    6433508.774152297
   ]
  },
  "min_50m": {
   "gradient_pct": -6.878941008423453,
   "start_distance_m": 2423.0,
   "end_distance_m": 2473.0,
   "midpoint_distance_m": 2448.0,
   "start_elevation_m": 933.0694753870242,
   "end_elevation_m": 929.6300048828125,
   "start_xy": [
    662594.3193940677,
    6433478.041725788
   ],
   "end_xy": [
    662560.366147848,
    6433514.741358569
   ]
  },
  "min_100m": {
   "gradient_pct": -3.6876388345212945,
   "start_distance_m": 1715.0,
   "end_distance_m": 1815.0,
   "midpoint_distance_m": 1765.0,
   "start_elevation_m": 912.9172083685089,
   "end_elevation_m": 909.2295695339876,
   "start_xy": [
    663181.9446536814,
    6433145.593173128
   ],
   "end_xy": [
    663103.7580488819,
    6433202.141836214
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.893220212962433,
   "start_distance_m": 287.0,
   "end_distance_m": 289.0,
   "midpoint_distance_m": 288.0,
   "start_elevation_m": 744.5980919474979,
   "end_elevation_m": 745.1559563517571,
   "start_xy": [
    663747.5156632425,
    6432514.949340893
   ],
   "end_xy": [
    663745.60828285,
    6432515.550922175
   ]
  },
  "max_3m": {
   "gradient_pct": 27.506715323355973,
   "start_distance_m": 287.0,
   "end_distance_m": 290.0,
   "midpoint_distance_m": 288.5,
   "start_elevation_m": 744.5980919474979,
   "end_elevation_m": 745.4232934071986,
   "start_xy": [
    663747.5156632425,
    6432514.949340893
   ],
   "end_xy": [
    663744.6545926539,
    6432515.851712815
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.002,
   "windows_resited": [
    2.0,
    3.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.382,
   "obstruction_max_height_m": 34.43,
   "flagged_windows_m": [
    2,
    3,
    5,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    2118.0,
    2123.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "descends_at_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "65362dc4429a167e9854da6969f58eec162b31f9",
   "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-mc3",
   "road_pbf": "block-batch-fr-mc3.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:af4eae1f5df9e232"
  },
  "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_E662-N6433_0m5@22LHD3KM-2025-09-17.tif",
   "data/cache/fr/ign-lidarhd_dtm_E663-N6432_0m5@22LHD3KN-2025-01-29.tif",
   "data/cache/fr/ign-lidarhd_dtm_E663-N6433_0m5@22LHD3KM-2025-09-17.tif"
  ],
  "calculated_at": "2026-09-22T15:29:22+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc3",
  "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": [
   "E662-N6433",
   "E663-N6432",
   "E663-N6433"
  ],
  "elevation_blocks": [
   "22LHD3KM@2025-09-17",
   "22LHD3KN@2025-01-29"
  ],
  "ign_dalles": [
   "LHD_FXX_0662_6434_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0663_6433_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0663_6434_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD3KM",
   "22LHD3KN"
  ],
  "ign_editions": [
   "2025-01-29",
   "2025-09-17"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0662_6434_MNT_O_0M50_LAMB93_IGN69": "2025-09-17",
   "LHD_FXX_0663_6433_MNT_O_0M50_LAMB93_IGN69": "2025-01-29",
   "LHD_FXX_0663_6434_MNT_O_0M50_LAMB93_IGN69": "2025-09-17"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 106,
   "stations_resolved": 106,
   "width_median_m": 5.25,
   "width_p10_m": 3.38,
   "width_min_m": 1.25,
   "width_max_m": 12.0,
   "bounded_share": 0.425,
   "unbounded_share": 0.575,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.25,
   "window_m": [
    366.0,
    391.0
   ],
   "width_at_max25_m": 5.0,
   "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": 106,
    "stations_resolved": 106,
    "width_median_m": 4.5,
    "width_p10_m": 0.62,
    "width_min_m": 0.0,
    "width_max_m": 12.0,
    "bounded_share": 0.887,
    "unbounded_share": 0.113,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.5,
    "window_m": [
     366.0,
     391.0
    ],
    "width_at_max25_m": 3.5,
    "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": "Velzic",
  "county": "Cantal",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}