{
 "ocl_version": "0.1.0",
 "name": "Impasse du Lavoir",
 "slug": "impasse-du-lavoir",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.26008577963654,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 412.0,
   "end_distance_m": 414.0,
   "start_elevation_m": 249.54854164535985,
   "end_elevation_m": 249.99374336095258,
   "min_gradient_pct": -0.6385031686775733
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.841561296743823,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 411.0,
   "end_distance_m": 414.0,
   "start_elevation_m": 249.33849652205026,
   "end_elevation_m": 249.99374336095258,
   "min_gradient_pct": -0.5485311280115942
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.349829981602397,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 425.0,
   "end_distance_m": 430.0,
   "start_elevation_m": 252.17280874118234,
   "end_elevation_m": 253.24030024026246,
   "min_gradient_pct": 0.3150123926315018
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.829778879740388,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 411.0,
   "end_distance_m": 421.0,
   "start_elevation_m": 249.33849652205026,
   "end_elevation_m": 251.4214744100243,
   "min_gradient_pct": 0.5398171384698003
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.491281019813954,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 411.0,
   "end_distance_m": 431.0,
   "start_elevation_m": 249.33849652205026,
   "end_elevation_m": 253.43675272601305,
   "min_gradient_pct": 0.8459160817869815
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.46491376608037,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 412.0,
   "end_distance_m": 437.0,
   "start_elevation_m": 249.54854164535985,
   "end_elevation_m": 254.66477008687994,
   "min_gradient_pct": 0.8700661137274892
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.828334633292286,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 396.0,
   "end_distance_m": 446.0,
   "start_elevation_m": 246.46638129181784,
   "end_elevation_m": 256.380548608464,
   "min_gradient_pct": 1.6278438525451406
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.06363036510487,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 358.0,
   "end_distance_m": 458.0,
   "start_elevation_m": 239.54981606309525,
   "end_elevation_m": 258.6134464282001,
   "min_gradient_pct": 3.1843170199602184
  }
 ],
 "shape": {
  "ascent_concentration": 0.473,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 141.0,
  "shape_class": "stepped"
 },
 "length_m": 605.6662329658521,
 "start_elevation_m": 216.61638516480159,
 "end_elevation_m": 270.2104565715207,
 "endpoint_gain_m": 53.59407140671911,
 "overall_gradient_pct": 8.848779821235434,
 "accumulated_ascent_m": 53.688085752638756,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.349829981602397,
   "start_distance_m": 425.0,
   "end_distance_m": 430.0,
   "midpoint_distance_m": 427.5,
   "start_elevation_m": 252.17280874118234,
   "end_elevation_m": 253.24030024026246,
   "start_xy": [
    864700.1550750209,
    6512126.516510872
   ],
   "end_xy": [
    864699.2624801446,
    6512131.436193218
   ]
  },
  "max_10m": {
   "gradient_pct": 20.829778879740388,
   "start_distance_m": 411.0,
   "end_distance_m": 421.0,
   "midpoint_distance_m": 416.0,
   "start_elevation_m": 249.33849652205026,
   "end_elevation_m": 251.4214744100243,
   "start_xy": [
    864702.3952037995,
    6512112.699023033
   ],
   "end_xy": [
    864700.8691509219,
    6512122.580764995
   ]
  },
  "max_20m": {
   "gradient_pct": 20.491281019813954,
   "start_distance_m": 411.0,
   "end_distance_m": 431.0,
   "midpoint_distance_m": 421.0,
   "start_elevation_m": 249.33849652205026,
   "end_elevation_m": 253.43675272601305,
   "start_xy": [
    864702.3952037995,
    6512112.699023033
   ],
   "end_xy": [
    864699.0839611695,
    6512132.4201296875
   ]
  },
  "max_25m": {
   "gradient_pct": 20.46491376608037,
   "start_distance_m": 412.0,
   "end_distance_m": 437.0,
   "midpoint_distance_m": 424.5,
   "start_elevation_m": 249.54854164535985,
   "end_elevation_m": 254.66477008687994,
   "start_xy": [
    864702.2509942908,
    6512113.68857021
   ],
   "end_xy": [
    864698.012847318,
    6512138.323748503
   ]
  },
  "max_50m": {
   "gradient_pct": 19.828334633292286,
   "start_distance_m": 396.0,
   "end_distance_m": 446.0,
   "midpoint_distance_m": 421.0,
   "start_elevation_m": 246.46638129181784,
   "end_elevation_m": 256.380548608464,
   "start_xy": [
    864704.558346429,
    6512097.855815361
   ],
   "end_xy": [
    864696.4061765408,
    6512147.179176725
   ]
  },
  "max_100m": {
   "gradient_pct": 19.06363036510487,
   "start_distance_m": 358.0,
   "end_distance_m": 458.0,
   "midpoint_distance_m": 408.0,
   "start_elevation_m": 239.54981606309525,
   "end_elevation_m": 258.6134464282001,
   "start_xy": [
    864722.8877281048,
    6512066.1305058
   ],
   "end_xy": [
    864694.2639488378,
    6512158.986414356
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.3150123926315018,
   "start_distance_m": 16.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 18.5,
   "start_elevation_m": 216.77940062622335,
   "end_elevation_m": 216.79515124585492,
   "start_xy": [
    864678.4796066366,
    6511768.877234156
   ],
   "end_xy": [
    864676.4322962106,
    6511773.438869829
   ]
  },
  "min_10m": {
   "gradient_pct": 0.5398171384698003,
   "start_distance_m": 16.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 21.0,
   "start_elevation_m": 216.77940062622335,
   "end_elevation_m": 216.83338234007033,
   "start_xy": [
    864678.4796066366,
    6511768.877234156
   ],
   "end_xy": [
    864674.3849857844,
    6511778.000505503
   ]
  },
  "min_20m": {
   "gradient_pct": 0.8459160817869815,
   "start_distance_m": 4.0,
   "end_distance_m": 24.0,
   "midpoint_distance_m": 14.0,
   "start_elevation_m": 216.66250198701385,
   "end_elevation_m": 216.83168520337125,
   "start_xy": [
    864683.393151659,
    6511757.929308539
   ],
   "end_xy": [
    864675.2039099549,
    6511776.175851234
   ]
  },
  "min_25m": {
   "gradient_pct": 0.8700661137274892,
   "start_distance_m": 1.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 13.5,
   "start_elevation_m": 216.61586581163846,
   "end_elevation_m": 216.83338234007033,
   "start_xy": [
    864684.6215379147,
    6511755.192327135
   ],
   "end_xy": [
    864674.3849857844,
    6511778.000505503
   ]
  },
  "min_50m": {
   "gradient_pct": 1.6278438525451406,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 216.61638516480159,
   "end_elevation_m": 217.43030709107416,
   "start_xy": [
    864685.031,
    6511754.28
   ],
   "end_xy": [
    864664.5578957393,
    6511799.896356737
   ]
  },
  "min_100m": {
   "gradient_pct": 3.1843170199602184,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 216.61638516480159,
   "end_elevation_m": 219.8007021847618,
   "start_xy": [
    864685.031,
    6511754.28
   ],
   "end_xy": [
    864644.0847914787,
    6511845.512713474
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.26008577963654,
   "start_distance_m": 412.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 413.0,
   "start_elevation_m": 249.54854164535985,
   "end_elevation_m": 249.99374336095258,
   "start_xy": [
    864702.2509942908,
    6512113.68857021
   ],
   "end_xy": [
    864701.9625752736,
    6512115.667664566
   ]
  },
  "max_3m": {
   "gradient_pct": 21.841561296743823,
   "start_distance_m": 411.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 412.5,
   "start_elevation_m": 249.33849652205026,
   "end_elevation_m": 249.99374336095258,
   "start_xy": [
    864702.3952037995,
    6512112.699023033
   ],
   "end_xy": [
    864701.9625752736,
    6512115.667664566
   ]
  }
 },
 "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": 0.013,
   "obstruction_max_height_m": 7.1,
   "flagged_windows_m": [
    5
   ]
  },
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "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_E864-N6511_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E864-N6512_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:28:23+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps1",
  "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": [
   "E864-N6511",
   "E864-N6512"
  ],
  "elevation_blocks": [
   "21LHD6OL@2025-02-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0864_6512_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0864_6513_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6OL"
  ],
  "ign_editions": [
   "2025-02-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0864_6512_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0864_6513_MNT_O_0M50_LAMB93_IGN69": "2025-02-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 31,
   "stations_resolved": 31,
   "width_median_m": 7.25,
   "width_p10_m": 5.25,
   "width_min_m": 3.5,
   "width_max_m": 12.0,
   "bounded_share": 0.323,
   "unbounded_share": 0.677,
   "confidence_median": 0.0,
   "width_median_bounded_m": 6.0,
   "window_m": [
    412.0,
    437.0
   ],
   "width_at_max25_m": 6.5,
   "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": 31,
    "stations_resolved": 31,
    "width_median_m": 7.0,
    "width_p10_m": 1.75,
    "width_min_m": 1.0,
    "width_max_m": 12.0,
    "bounded_share": 0.677,
    "unbounded_share": 0.323,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.75,
    "window_m": [
     412.0,
     437.0
    ],
    "width_at_max25_m": 6.0,
    "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": "Satolas-et-Bonce",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}