{
 "ocl_version": "0.1.0",
 "name": "Route des Sables",
 "slug": "route-des-sables",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.214464252845346,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 114.0,
   "end_distance_m": 116.0,
   "start_elevation_m": 300.6981103731448,
   "end_elevation_m": 301.1623996582017,
   "min_gradient_pct": -14.985923865916106
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.106531546746584,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 114.0,
   "end_distance_m": 117.0,
   "start_elevation_m": 300.6981103731448,
   "end_elevation_m": 301.3913063195472,
   "min_gradient_pct": -14.055331173722152
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.57708568076623,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 111.0,
   "end_distance_m": 116.0,
   "start_elevation_m": 300.0335453741634,
   "end_elevation_m": 301.1623996582017,
   "min_gradient_pct": -13.678951786464495
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.122913952183012,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 110.0,
   "end_distance_m": 120.0,
   "start_elevation_m": 299.8288414656617,
   "end_elevation_m": 302.04113286088,
   "min_gradient_pct": -13.306731562631171
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.325726841279504,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 100.0,
   "end_distance_m": 120.0,
   "start_elevation_m": 297.7759874926241,
   "end_elevation_m": 302.04113286088,
   "min_gradient_pct": -12.901589874215631
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.90480035618134,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 98.0,
   "end_distance_m": 123.0,
   "start_elevation_m": 297.38872219731127,
   "end_elevation_m": 302.6149222863566,
   "min_gradient_pct": -12.455097396419433
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.517559761547545,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 146.0,
   "end_distance_m": 196.0,
   "start_elevation_m": 305.9845511504491,
   "end_elevation_m": 315.24333103122285,
   "min_gradient_pct": -10.42471151785412
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.22905008933151,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 96.0,
   "end_distance_m": 196.0,
   "start_elevation_m": 297.01428094189134,
   "end_elevation_m": 315.24333103122285,
   "min_gradient_pct": -7.944426830321447
  }
 ],
 "shape": {
  "ascent_concentration": 0.395,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 141.0,
  "shape_class": "sustained"
 },
 "length_m": 1234.0078279576774,
 "start_elevation_m": 289.6136532187479,
 "end_elevation_m": 363.49900878907647,
 "endpoint_gain_m": 73.88535557032856,
 "overall_gradient_pct": 5.9874300548491,
 "accumulated_ascent_m": 82.93746374122532,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.57708568076623,
   "start_distance_m": 111.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 113.5,
   "start_elevation_m": 300.0335453741634,
   "end_elevation_m": 301.1623996582017,
   "start_xy": [
    841557.0819093259,
    6453378.636179461
   ],
   "end_xy": [
    841552.4644781622,
    6453376.892350065
   ]
  },
  "max_10m": {
   "gradient_pct": 22.122913952183012,
   "start_distance_m": 110.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 115.0,
   "start_elevation_m": 299.8288414656617,
   "end_elevation_m": 302.04113286088,
   "start_xy": [
    841558.0499337257,
    6453378.887035519
   ],
   "end_xy": [
    841549.1637252542,
    6453374.632918667
   ]
  },
  "max_20m": {
   "gradient_pct": 21.325726841279504,
   "start_distance_m": 100.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 110.0,
   "start_elevation_m": 297.7759874926241,
   "end_elevation_m": 302.04113286088,
   "start_xy": [
    841566.721291439,
    6453383.726135943
   ],
   "end_xy": [
    841549.1637252542,
    6453374.632918667
   ]
  },
  "max_25m": {
   "gradient_pct": 20.90480035618134,
   "start_distance_m": 98.0,
   "end_distance_m": 123.0,
   "midpoint_distance_m": 110.5,
   "start_elevation_m": 297.38872219731127,
   "end_elevation_m": 302.6149222863566,
   "start_xy": [
    841568.3365716496,
    6453384.9027223475
   ],
   "end_xy": [
    841546.6881605732,
    6453372.938345119
   ]
  },
  "max_50m": {
   "gradient_pct": 18.517559761547545,
   "start_distance_m": 146.0,
   "end_distance_m": 196.0,
   "midpoint_distance_m": 171.0,
   "start_elevation_m": 305.9845511504491,
   "end_elevation_m": 315.24333103122285,
   "start_xy": [
    841540.4427553491,
    6453351.702921363
   ],
   "end_xy": [
    841544.6874037528,
    6453301.8863780415
   ]
  },
  "max_100m": {
   "gradient_pct": 18.22905008933151,
   "start_distance_m": 96.0,
   "end_distance_m": 196.0,
   "midpoint_distance_m": 146.0,
   "start_elevation_m": 297.01428094189134,
   "end_elevation_m": 315.24333103122285,
   "start_xy": [
    841569.9240144134,
    6453386.119285322
   ],
   "end_xy": [
    841544.6874037528,
    6453301.8863780415
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -13.678951786464495,
   "start_distance_m": 466.0,
   "end_distance_m": 471.0,
   "midpoint_distance_m": 468.5,
   "start_elevation_m": 324.3472978171143,
   "end_elevation_m": 323.66335022779106,
   "start_xy": [
    841551.3842669078,
    6453053.739291135
   ],
   "end_xy": [
    841553.548188282,
    6453049.231803555
   ]
  },
  "min_10m": {
   "gradient_pct": -13.306731562631171,
   "start_distance_m": 460.0,
   "end_distance_m": 470.0,
   "midpoint_distance_m": 465.0,
   "start_elevation_m": 325.14926301024894,
   "end_elevation_m": 323.8185898539858,
   "start_xy": [
    841548.787561259,
    6453059.148276232
   ],
   "end_xy": [
    841553.1154040071,
    6453050.133301071
   ]
  },
  "min_20m": {
   "gradient_pct": -12.901589874215631,
   "start_distance_m": 455.0,
   "end_distance_m": 475.0,
   "midpoint_distance_m": 465.0,
   "start_elevation_m": 325.7654292854886,
   "end_elevation_m": 323.1851113106455,
   "start_xy": [
    841546.623639885,
    6453063.655763812
   ],
   "end_xy": [
    841555.3455675937,
    6453045.65889176
   ]
  },
  "min_25m": {
   "gradient_pct": -12.455097396419433,
   "start_distance_m": 450.0,
   "end_distance_m": 475.0,
   "midpoint_distance_m": 462.5,
   "start_elevation_m": 326.29888565975034,
   "end_elevation_m": 323.1851113106455,
   "start_xy": [
    841544.459718511,
    6453068.163251393
   ],
   "end_xy": [
    841555.3455675937,
    6453045.65889176
   ]
  },
  "min_50m": {
   "gradient_pct": -10.42471151785412,
   "start_distance_m": 448.0,
   "end_distance_m": 498.0,
   "midpoint_distance_m": 473.0,
   "start_elevation_m": 326.46903976966246,
   "end_elevation_m": 321.2566840107354,
   "start_xy": [
    841543.5941499614,
    6453069.966246425
   ],
   "end_xy": [
    841567.0545772942,
    6453025.886613031
   ]
  },
  "min_100m": {
   "gradient_pct": -7.944426830321447,
   "start_distance_m": 419.0,
   "end_distance_m": 519.0,
   "midpoint_distance_m": 469.0,
   "start_elevation_m": 327.9475999847663,
   "end_elevation_m": 320.0031731544449,
   "start_xy": [
    841530.1725444809,
    6453095.656252071
   ],
   "end_xy": [
    841578.7509400264,
    6453008.449264275
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.214464252845346,
   "start_distance_m": 114.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 115.0,
   "start_elevation_m": 300.6981103731448,
   "end_elevation_m": 301.1623996582017,
   "start_xy": [
    841554.1778361265,
    6453377.88361129
   ],
   "end_xy": [
    841552.4644781622,
    6453376.892350065
   ]
  },
  "max_3m": {
   "gradient_pct": 23.106531546746584,
   "start_distance_m": 114.0,
   "end_distance_m": 117.0,
   "midpoint_distance_m": 115.5,
   "start_elevation_m": 300.6981103731448,
   "end_elevation_m": 301.3913063195472,
   "start_xy": [
    841554.1778361265,
    6453377.88361129
   ],
   "end_xy": [
    841551.6392899352,
    6453376.327492216
   ]
  }
 },
 "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": 0.049,
   "obstruction_max_height_m": 14.68,
   "flagged_windows_m": []
  },
  "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_E841-N6452_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E841-N6453_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:37:32+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": [
   "E841-N6452",
   "E841-N6453"
  ],
  "elevation_blocks": [
   "21LHD6OM@2024-10-24"
  ],
  "ign_dalles": [
   "LHD_FXX_0841_6453_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0841_6454_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6OM"
  ],
  "ign_editions": [
   "2024-10-24"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0841_6453_MNT_O_0M50_LAMB93_IGN69": "2024-10-24",
   "LHD_FXX_0841_6454_MNT_O_0M50_LAMB93_IGN69": "2024-10-24"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 56,
   "stations_resolved": 56,
   "width_median_m": 6.25,
   "width_p10_m": 4.75,
   "width_min_m": 3.75,
   "width_max_m": 12.0,
   "bounded_share": 0.161,
   "unbounded_share": 0.839,
   "confidence_median": 0.0,
   "width_median_bounded_m": 6.75,
   "window_m": [
    98.0,
    123.0
   ],
   "width_at_max25_m": 6.25,
   "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": 56,
    "stations_resolved": 56,
    "width_median_m": 8.5,
    "width_p10_m": 3.62,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.571,
    "unbounded_share": 0.429,
    "confidence_median": 1.0,
    "width_median_bounded_m": 7.38,
    "window_m": [
     98.0,
     123.0
    ],
    "width_at_max25_m": 8.75,
    "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": "Ozon",
  "county": "Ard\u00e8che",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}