{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (45.4641, 2.7894)",
 "slug": "discovered-lane-45-4641-2-7894",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 28.883424095670307,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 744.0,
   "end_distance_m": 746.0,
   "start_elevation_m": 1105.73854563112,
   "end_elevation_m": 1106.3162141130333,
   "min_gradient_pct": -2.1558673307822573
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.868194407211377,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 748.0,
   "end_distance_m": 751.0,
   "start_elevation_m": 1106.4827335389618,
   "end_elevation_m": 1107.2887793711782,
   "min_gradient_pct": -1.7954079709549358
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.36546839606217,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 748.0,
   "end_distance_m": 753.0,
   "start_elevation_m": 1106.4827335389618,
   "end_elevation_m": 1107.751006958765,
   "min_gradient_pct": -1.7558608643639673
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.017187139596444,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 745.0,
   "end_distance_m": 755.0,
   "start_elevation_m": 1105.8672079394628,
   "end_elevation_m": 1108.1689266534224,
   "min_gradient_pct": -1.5215947578985833
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.64603932246564,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 742.0,
   "end_distance_m": 762.0,
   "start_elevation_m": 1105.245849729114,
   "end_elevation_m": 1109.5750575936072,
   "min_gradient_pct": -1.3758246065390267
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.431524853975134,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 748.0,
   "end_distance_m": 773.0,
   "start_elevation_m": 1106.4827335389618,
   "end_elevation_m": 1111.8406147524556,
   "min_gradient_pct": -1.3317728417823673
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.42978114651214,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 724.0,
   "end_distance_m": 774.0,
   "start_elevation_m": 1102.3479060051345,
   "end_elevation_m": 1112.0627965783906,
   "min_gradient_pct": -1.0531808559353522
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.23443183357699,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 674.0,
   "end_distance_m": 774.0,
   "start_elevation_m": 1094.8283647448136,
   "end_elevation_m": 1112.0627965783906,
   "min_gradient_pct": 0.07441890564496134
  }
 ],
 "shape": {
  "ascent_concentration": 0.488,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 147.0,
  "shape_class": "stepped"
 },
 "length_m": 774.523388188767,
 "start_elevation_m": 1052.9529227592768,
 "end_elevation_m": 1112.180729523347,
 "endpoint_gain_m": 59.22780676407024,
 "overall_gradient_pct": 7.64700042210155,
 "accumulated_ascent_m": 59.860487025999646,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.36546839606217,
   "start_distance_m": 748.0,
   "end_distance_m": 753.0,
   "midpoint_distance_m": 750.5,
   "start_elevation_m": 1106.4827335389618,
   "end_elevation_m": 1107.751006958765,
   "start_xy": [
    683639.6296327505,
    6485078.543539107
   ],
   "end_xy": [
    683638.7599900624,
    6485083.467330491
   ]
  },
  "max_10m": {
   "gradient_pct": 23.017187139596444,
   "start_distance_m": 745.0,
   "end_distance_m": 755.0,
   "midpoint_distance_m": 750.0,
   "start_elevation_m": 1105.8672079394628,
   "end_elevation_m": 1108.1689266534224,
   "start_xy": [
    683640.1514183633,
    6485075.589264276
   ],
   "end_xy": [
    683638.1485717993,
    6485085.367757326
   ]
  },
  "max_20m": {
   "gradient_pct": 21.64603932246564,
   "start_distance_m": 742.0,
   "end_distance_m": 762.0,
   "midpoint_distance_m": 752.0,
   "start_elevation_m": 1105.245849729114,
   "end_elevation_m": 1109.5750575936072,
   "start_xy": [
    683640.6732039761,
    6485072.634989446
   ],
   "end_xy": [
    683635.8278679257,
    6485091.97187222
   ]
  },
  "max_25m": {
   "gradient_pct": 21.431524853975134,
   "start_distance_m": 748.0,
   "end_distance_m": 773.0,
   "midpoint_distance_m": 760.5,
   "start_elevation_m": 1106.4827335389618,
   "end_elevation_m": 1111.8406147524556,
   "start_xy": [
    683639.6296327505,
    6485078.543539107
   ],
   "end_xy": [
    683632.181047553,
    6485102.349767053
   ]
  },
  "max_50m": {
   "gradient_pct": 19.42978114651214,
   "start_distance_m": 724.0,
   "end_distance_m": 774.0,
   "midpoint_distance_m": 749.0,
   "start_elevation_m": 1102.3479060051345,
   "end_elevation_m": 1112.0627965783906,
   "start_xy": [
    683635.8944000696,
    6485056.97094748
   ],
   "end_xy": [
    683631.8495184281,
    6485103.2932120375
   ]
  },
  "max_100m": {
   "gradient_pct": 17.23443183357699,
   "start_distance_m": 674.0,
   "end_distance_m": 774.0,
   "midpoint_distance_m": 724.0,
   "start_elevation_m": 1094.8283647448136,
   "end_elevation_m": 1112.0627965783906,
   "start_xy": [
    683598.5061273663,
    6485025.285391731
   ],
   "end_xy": [
    683631.8495184281,
    6485103.2932120375
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.7558608643639673,
   "start_distance_m": 13.0,
   "end_distance_m": 18.0,
   "midpoint_distance_m": 15.5,
   "start_elevation_m": 1052.8579065111107,
   "end_elevation_m": 1052.7701134678925,
   "start_xy": [
    683976.5129337643,
    6485012.565019281
   ],
   "end_xy": [
    683971.6375236736,
    6485011.455795928
   ]
  },
  "min_10m": {
   "gradient_pct": -1.5215947578985833,
   "start_distance_m": 20.0,
   "end_distance_m": 30.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 1052.7647705113898,
   "end_elevation_m": 1052.6126110356,
   "start_xy": [
    683969.6873596373,
    6485011.012106586
   ],
   "end_xy": [
    683959.936539456,
    6485008.79365988
   ]
  },
  "min_20m": {
   "gradient_pct": -1.3758246065390267,
   "start_distance_m": 9.0,
   "end_distance_m": 29.0,
   "midpoint_distance_m": 19.0,
   "start_elevation_m": 1052.9042130215682,
   "end_elevation_m": 1052.6290481002604,
   "start_xy": [
    683980.4132618369,
    6485013.452397964
   ],
   "end_xy": [
    683960.9116214741,
    6485009.01550455
   ]
  },
  "min_25m": {
   "gradient_pct": -1.3317728417823673,
   "start_distance_m": 7.0,
   "end_distance_m": 32.0,
   "midpoint_distance_m": 19.5,
   "start_elevation_m": 1052.9274567419616,
   "end_elevation_m": 1052.594513531516,
   "start_xy": [
    683982.3634258731,
    6485013.896087306
   ],
   "end_xy": [
    683957.9863754198,
    6485008.349970538
   ]
  },
  "min_50m": {
   "gradient_pct": -1.0531808559353522,
   "start_distance_m": 1.0,
   "end_distance_m": 51.0,
   "midpoint_distance_m": 26.0,
   "start_elevation_m": 1052.9497167111444,
   "end_elevation_m": 1052.4231262831768,
   "start_xy": [
    683988.2139179818,
    6485015.22715533
   ],
   "end_xy": [
    683939.5133775815,
    6485003.914238873
   ]
  },
  "min_100m": {
   "gradient_pct": 0.07441890564496134,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 1052.9529227592768,
   "end_elevation_m": 1053.0273416649218,
   "start_xy": [
    683989.189,
    6485015.449
   ],
   "end_xy": [
    683891.8560746326,
    6484992.6785540655
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 28.883424095670307,
   "start_distance_m": 744.0,
   "end_distance_m": 746.0,
   "midpoint_distance_m": 745.0,
   "start_elevation_m": 1105.73854563112,
   "end_elevation_m": 1106.3162141130333,
   "start_xy": [
    683640.325346901,
    6485074.604506
   ],
   "end_xy": [
    683639.9774898258,
    6485076.574022554
   ]
  },
  "max_3m": {
   "gradient_pct": 26.868194407211377,
   "start_distance_m": 748.0,
   "end_distance_m": 751.0,
   "midpoint_distance_m": 749.5,
   "start_elevation_m": 1106.4827335389618,
   "end_elevation_m": 1107.2887793711782,
   "start_xy": [
    683639.6296327505,
    6485078.543539107
   ],
   "end_xy": [
    683639.1078471377,
    6485081.497813938
   ]
  }
 },
 "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": 0.168,
   "obstruction_max_height_m": 21.31,
   "flagged_windows_m": [
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "1cc9fdcd6556a02163cb21acb2293cad3067d2a1",
   "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-mc4",
   "road_pbf": "block-batch-fr-mc4.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_E683-N6484_0m5@22LHD3KL-2025-09-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E683-N6485_0m5@22LHD3KL-2025-09-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E684-N6484_0m5@22LHD3KL-2025-09-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E684-N6485_0m5@22LHD3KL-2025-09-19.tif"
  ],
  "calculated_at": "2026-09-22T18:34:03+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc4",
  "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": [
   "E683-N6484",
   "E683-N6485",
   "E684-N6484",
   "E684-N6485"
  ],
  "elevation_blocks": [
   "22LHD3KL@2025-09-19"
  ],
  "ign_dalles": [
   "LHD_FXX_0683_6485_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0683_6486_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0684_6485_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0684_6486_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD3KL"
  ],
  "ign_editions": [
   "2025-09-19"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0683_6485_MNT_O_0M50_LAMB93_IGN69": "2025-09-19",
   "LHD_FXX_0683_6486_MNT_O_0M50_LAMB93_IGN69": "2025-09-19",
   "LHD_FXX_0684_6485_MNT_O_0M50_LAMB93_IGN69": "2025-09-19",
   "LHD_FXX_0684_6486_MNT_O_0M50_LAMB93_IGN69": "2025-09-19"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 37,
   "stations_resolved": 37,
   "width_median_m": 4.0,
   "width_p10_m": 3.25,
   "width_min_m": 2.25,
   "width_max_m": 9.75,
   "bounded_share": 0.189,
   "unbounded_share": 0.811,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.0,
   "window_m": [
    748.0,
    773.0
   ],
   "width_at_max25_m": 3.5,
   "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": 37,
    "stations_resolved": 37,
    "width_median_m": 6.0,
    "width_p10_m": 1.25,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.676,
    "unbounded_share": 0.324,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.25,
    "window_m": [
     748.0,
     773.0
    ],
    "width_at_max25_m": 4.75,
    "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": "Picherande",
  "county": "Puy-de-D\u00f4me",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}