{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (47.9992, -0.6794)",
 "slug": "discovered-lane-47-9992-0-6794",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 47.330700795145475,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 158.0,
   "end_distance_m": 160.0,
   "start_elevation_m": 84.69787806646605,
   "end_elevation_m": 85.64449208236896,
   "min_gradient_pct": -10.632291957610107
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 41.02737276352334,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 157.0,
   "end_distance_m": 160.0,
   "start_elevation_m": 84.41367089946326,
   "end_elevation_m": 85.64449208236896,
   "min_gradient_pct": -8.220417709766537
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.179092005288567,
   "diagnostic": false,
   "flags": [
    "suppression_unstable",
    "canopy_or_structure"
   ],
   "start_distance_m": 157.0,
   "end_distance_m": 162.0,
   "start_elevation_m": 84.41367089946326,
   "end_elevation_m": 85.97262549972768,
   "min_gradient_pct": -3.9494837339685773
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.054290149465487,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 135.0,
   "end_distance_m": 145.0,
   "start_elevation_m": 80.77278734612067,
   "end_elevation_m": 83.17821636106721,
   "min_gradient_pct": -2.9389454680197957
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.100073647862843,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 125.0,
   "end_distance_m": 145.0,
   "start_elevation_m": 78.95820163149465,
   "end_elevation_m": 83.17821636106721,
   "min_gradient_pct": -0.7294797051628166
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.121040317869415,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 117.0,
   "end_distance_m": 142.0,
   "start_elevation_m": 77.1295876633836,
   "end_elevation_m": 82.40984774285096,
   "min_gradient_pct": 0.35166694515919517
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.121251104475675,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 96.0,
   "end_distance_m": 146.0,
   "start_elevation_m": 73.7895735206759,
   "end_elevation_m": 83.35019907291374,
   "min_gradient_pct": 1.8442602654305063
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.27515858639815,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 60.0,
   "end_distance_m": 160.0,
   "start_elevation_m": 68.3693334959708,
   "end_elevation_m": 85.64449208236896,
   "min_gradient_pct": 3.038436088644829
  }
 ],
 "shape": {
  "ascent_concentration": 0.481,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 151.0,
  "shape_class": "stepped"
 },
 "length_m": 447.36780386669705,
 "start_elevation_m": 59.887746699219335,
 "end_elevation_m": 98.31374216672671,
 "endpoint_gain_m": 38.42599546750738,
 "overall_gradient_pct": 8.589352013127264,
 "accumulated_ascent_m": 39.82688737974459,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.179092005288567,
   "start_distance_m": 157.0,
   "end_distance_m": 162.0,
   "midpoint_distance_m": 159.5,
   "start_elevation_m": 84.41367089946326,
   "end_elevation_m": 85.97262549972768,
   "start_xy": [
    425674.2281976479,
    6772946.399613478
   ],
   "end_xy": [
    425673.01744822256,
    6772951.250807746
   ]
  },
  "max_10m": {
   "gradient_pct": 24.054290149465487,
   "start_distance_m": 135.0,
   "end_distance_m": 145.0,
   "midpoint_distance_m": 140.0,
   "start_elevation_m": 80.77278734612067,
   "end_elevation_m": 83.17821636106721,
   "start_xy": [
    425686.8223745865,
    6772929.295319988
   ],
   "end_xy": [
    425679.5659461413,
    6772936.17603552
   ]
  },
  "max_20m": {
   "gradient_pct": 21.100073647862843,
   "start_distance_m": 125.0,
   "end_distance_m": 145.0,
   "midpoint_distance_m": 135.0,
   "start_elevation_m": 78.95820163149465,
   "end_elevation_m": 83.17821636106721,
   "start_xy": [
    425694.1718869161,
    6772922.514244963
   ],
   "end_xy": [
    425679.5659461413,
    6772936.17603552
   ]
  },
  "max_25m": {
   "gradient_pct": 21.121040317869415,
   "start_distance_m": 117.0,
   "end_distance_m": 142.0,
   "midpoint_distance_m": 129.5,
   "start_elevation_m": 77.1295876633836,
   "end_elevation_m": 82.40984774285096,
   "start_xy": [
    425700.05826557707,
    6772917.09663052
   ],
   "end_xy": [
    425681.74287467485,
    6772934.111820861
   ]
  },
  "max_50m": {
   "gradient_pct": 19.121251104475675,
   "start_distance_m": 96.0,
   "end_distance_m": 146.0,
   "midpoint_distance_m": 121.0,
   "start_elevation_m": 73.7895735206759,
   "end_elevation_m": 83.35019907291374,
   "start_xy": [
    425717.6761755206,
    6772906.1864203205
   ],
   "end_xy": [
    425678.8403032968,
    6772936.864107073
   ]
  },
  "max_100m": {
   "gradient_pct": 17.27515858639815,
   "start_distance_m": 60.0,
   "end_distance_m": 160.0,
   "midpoint_distance_m": 110.0,
   "start_elevation_m": 68.3693334959708,
   "end_elevation_m": 85.64449208236896,
   "start_xy": [
    425752.33707078843,
    6772901.733560973
   ],
   "end_xy": [
    425673.50174576155,
    6772949.310329483
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.9494837339685773,
   "start_distance_m": 260.0,
   "end_distance_m": 265.0,
   "midpoint_distance_m": 262.5,
   "start_elevation_m": 91.53244642007381,
   "end_elevation_m": 91.33497223337538,
   "start_xy": [
    425655.22336211684,
    6773040.493166198
   ],
   "end_xy": [
    425653.2935537666,
    6773044.578322881
   ]
  },
  "min_10m": {
   "gradient_pct": -2.9389454680197957,
   "start_distance_m": 199.0,
   "end_distance_m": 209.0,
   "midpoint_distance_m": 204.0,
   "start_elevation_m": 89.37524273915875,
   "end_elevation_m": 89.08134819235677,
   "start_xy": [
    425660.53983841033,
    6772985.924589075
   ],
   "end_xy": [
    425662.00204819813,
    6772995.817108599
   ]
  },
  "min_20m": {
   "gradient_pct": -0.7294797051628166,
   "start_distance_m": 199.0,
   "end_distance_m": 219.0,
   "midpoint_distance_m": 209.0,
   "start_elevation_m": 89.37524273915875,
   "end_elevation_m": 89.22934679812619,
   "start_xy": [
    425660.53983841033,
    6772985.924589075
   ],
   "end_xy": [
    425661.4459608324,
    6773005.578676891
   ]
  },
  "min_25m": {
   "gradient_pct": 0.35166694515919517,
   "start_distance_m": 198.0,
   "end_distance_m": 223.0,
   "midpoint_distance_m": 210.5,
   "start_elevation_m": 89.32951152618405,
   "end_elevation_m": 89.41742826247385,
   "start_xy": [
    425660.47118866484,
    6772984.944991125
   ],
   "end_xy": [
    425660.3546556739,
    6773009.426930138
   ]
  },
  "min_50m": {
   "gradient_pct": 1.8442602654305063,
   "start_distance_m": 199.0,
   "end_distance_m": 249.0,
   "midpoint_distance_m": 224.0,
   "start_elevation_m": 89.37524273915875,
   "end_elevation_m": 90.297372871874,
   "start_xy": [
    425660.53983841033,
    6772985.924589075
   ],
   "end_xy": [
    425656.79030932416,
    6773031.428399695
   ]
  },
  "min_100m": {
   "gradient_pct": 3.038436088644829,
   "start_distance_m": 347.0,
   "end_distance_m": 447.0,
   "midpoint_distance_m": 397.0,
   "start_elevation_m": 95.25372519985316,
   "end_elevation_m": 98.292161288498,
   "start_xy": [
    425667.60973085277,
    6773117.008741137
   ],
   "end_xy": [
    425651.94042790163,
    6773215.113236186
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 47.330700795145475,
   "start_distance_m": 158.0,
   "end_distance_m": 160.0,
   "midpoint_distance_m": 159.0,
   "start_elevation_m": 84.69787806646605,
   "end_elevation_m": 85.64449208236896,
   "start_xy": [
    425673.98604701913,
    6772947.369852146
   ],
   "end_xy": [
    425673.50174576155,
    6772949.310329483
   ]
  },
  "max_3m": {
   "gradient_pct": 41.02737276352334,
   "start_distance_m": 157.0,
   "end_distance_m": 160.0,
   "midpoint_distance_m": 158.5,
   "start_elevation_m": 84.41367089946326,
   "end_elevation_m": 85.64449208236896,
   "start_xy": [
    425674.2281976479,
    6772946.399613478
   ],
   "end_xy": [
    425673.50174576155,
    6772949.310329483
   ]
  }
 },
 "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": 157.0,
     "end_m": 162.0,
     "raw_pct": 31.18,
     "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": 0.35,
   "obstruction_max_height_m": 16.79,
   "flagged_windows_m": [
    2,
    3,
    5.0,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "11607044e533e467c5c753c7fffd2d09371a473e",
   "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-no2",
   "road_pbf": "block-batch-fr-no2.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_E425-N6772_0m5@23LHD3FG-2024-12-20.tif",
   "data/cache/fr/ign-lidarhd_dtm_E425-N6773_0m5@23LHD3FG-2024-12-20.tif"
  ],
  "calculated_at": "2026-09-26T00:59:52+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-no2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-no2",
  "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": [
   "E425-N6772",
   "E425-N6773"
  ],
  "elevation_blocks": [
   "23LHD3FG@2024-12-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0425_6773_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0425_6774_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "23LHD3FG"
  ],
  "ign_editions": [
   "2024-12-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0425_6773_MNT_O_0M50_LAMB93_IGN69": "2024-12-20",
   "LHD_FXX_0425_6774_MNT_O_0M50_LAMB93_IGN69": "2024-12-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 4,
  "suppression_unstable": [
   5.0
  ],
  "carriageway": {
   "stations": 24,
   "stations_resolved": 24,
   "width_median_m": 5.5,
   "width_p10_m": 2.33,
   "width_min_m": 2.0,
   "width_max_m": 10.5,
   "bounded_share": 0.125,
   "unbounded_share": 0.875,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.5,
   "window_m": [
    117.0,
    142.0
   ],
   "width_at_max25_m": 8.5,
   "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": 24,
    "stations_resolved": 24,
    "width_median_m": 5.38,
    "width_p10_m": 0.5,
    "width_min_m": 0.0,
    "width_max_m": 12.0,
    "bounded_share": 0.625,
    "unbounded_share": 0.375,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.5,
    "window_m": [
     117.0,
     142.0
    ],
    "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": "Parn\u00e9-sur-Roc",
  "county": "Mayenne",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}