{
 "ocl_version": "0.1.0",
 "name": "Chemin du Cottin",
 "slug": "chemin-du-cottin",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.739536701243424,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 202.0,
   "end_distance_m": 204.0,
   "start_elevation_m": 383.87855531278507,
   "end_elevation_m": 384.33334604680994,
   "min_gradient_pct": -1.3770164142698604
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.622944838678904,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 202.0,
   "end_distance_m": 205.0,
   "start_elevation_m": 383.87855531278507,
   "end_elevation_m": 384.55724365794543,
   "min_gradient_pct": -1.0406320822066089
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.30690323234171,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 202.0,
   "end_distance_m": 207.0,
   "start_elevation_m": 383.87855531278507,
   "end_elevation_m": 384.99390047440215,
   "min_gradient_pct": -0.6221996397573548
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.608016309613163,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 200.0,
   "end_distance_m": 210.0,
   "start_elevation_m": 383.46262945342096,
   "end_elevation_m": 385.6234310843823,
   "min_gradient_pct": -0.11730022714345978
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.950463467470115,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 195.0,
   "end_distance_m": 215.0,
   "start_elevation_m": 382.4467711848067,
   "end_elevation_m": 386.63686387830074,
   "min_gradient_pct": 0.9374840768396098
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.78383227278232,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 195.0,
   "end_distance_m": 220.0,
   "start_elevation_m": 382.4467711848067,
   "end_elevation_m": 387.6427292530023,
   "min_gradient_pct": 1.3141100493132853
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.561223417700603,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 186.0,
   "end_distance_m": 236.0,
   "start_elevation_m": 380.74995739504743,
   "end_elevation_m": 390.53056910389773,
   "min_gradient_pct": 2.4558069964939477
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.51450880333556,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 153.0,
   "end_distance_m": 253.0,
   "start_elevation_m": 375.6162032069989,
   "end_elevation_m": 393.13071201033443,
   "min_gradient_pct": 3.436836969029059
  }
 ],
 "shape": {
  "ascent_concentration": 0.463,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 143.0,
  "shape_class": "stepped"
 },
 "length_m": 410.289785515078,
 "start_elevation_m": 367.08682928783196,
 "end_elevation_m": 405.7841237915316,
 "endpoint_gain_m": 38.69729450369965,
 "overall_gradient_pct": 9.431698245940744,
 "accumulated_ascent_m": 38.78579259955899,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.30690323234171,
   "start_distance_m": 202.0,
   "end_distance_m": 207.0,
   "midpoint_distance_m": 204.5,
   "start_elevation_m": 383.87855531278507,
   "end_elevation_m": 384.99390047440215,
   "start_xy": [
    921884.0062493351,
    6505886.354571142
   ],
   "end_xy": [
    921879.0104759488,
    6505886.149027297
   ]
  },
  "max_10m": {
   "gradient_pct": 21.608016309613163,
   "start_distance_m": 200.0,
   "end_distance_m": 210.0,
   "midpoint_distance_m": 205.0,
   "start_elevation_m": 383.46262945342096,
   "end_elevation_m": 385.6234310843823,
   "start_xy": [
    921886.0045586897,
    6505886.43678868
   ],
   "end_xy": [
    921876.013011917,
    6505886.02570099
   ]
  },
  "max_20m": {
   "gradient_pct": 20.950463467470115,
   "start_distance_m": 195.0,
   "end_distance_m": 215.0,
   "midpoint_distance_m": 205.0,
   "start_elevation_m": 382.4467711848067,
   "end_elevation_m": 386.63686387830074,
   "start_xy": [
    921890.9697303096,
    6505887.025173213
   ],
   "end_xy": [
    921871.0159019812,
    6505885.868438199
   ]
  },
  "max_25m": {
   "gradient_pct": 20.78383227278232,
   "start_distance_m": 195.0,
   "end_distance_m": 220.0,
   "midpoint_distance_m": 207.5,
   "start_elevation_m": 382.4467711848067,
   "end_elevation_m": 387.6427292530023,
   "start_xy": [
    921890.9697303096,
    6505887.025173213
   ],
   "end_xy": [
    921866.0164082682,
    6505885.797286146
   ]
  },
  "max_50m": {
   "gradient_pct": 19.561223417700603,
   "start_distance_m": 186.0,
   "end_distance_m": 236.0,
   "midpoint_distance_m": 211.0,
   "start_elevation_m": 380.74995739504743,
   "end_elevation_m": 390.53056910389773,
   "start_xy": [
    921899.9067126822,
    6505888.08835056
   ],
   "end_xy": [
    921850.0202065418,
    6505885.768969209
   ]
  },
  "max_100m": {
   "gradient_pct": 17.51450880333556,
   "start_distance_m": 153.0,
   "end_distance_m": 253.0,
   "midpoint_distance_m": 203.0,
   "start_elevation_m": 375.6162032069989,
   "end_elevation_m": 393.13071201033443,
   "start_xy": [
    921932.661595593,
    6505892.077711273
   ],
   "end_xy": [
    921833.03108976,
    6505886.377090873
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.6221996397573548,
   "start_distance_m": 72.0,
   "end_distance_m": 77.0,
   "midpoint_distance_m": 74.5,
   "start_elevation_m": 369.4378661730862,
   "end_elevation_m": 369.40675619109834,
   "start_xy": [
    922008.4577859128,
    6505904.632484202
   ],
   "end_xy": [
    922006.2064509908,
    6505909.096954056
   ]
  },
  "min_10m": {
   "gradient_pct": -0.11730022714345978,
   "start_distance_m": 67.0,
   "end_distance_m": 77.0,
   "midpoint_distance_m": 72.0,
   "start_elevation_m": 369.4184862138127,
   "end_elevation_m": 369.40675619109834,
   "start_xy": [
    922011.0267392579,
    6505900.367648591
   ],
   "end_xy": [
    922006.2064509908,
    6505909.096954056
   ]
  },
  "min_20m": {
   "gradient_pct": 0.9374840768396098,
   "start_distance_m": 57.0,
   "end_distance_m": 77.0,
   "midpoint_distance_m": 67.0,
   "start_elevation_m": 369.2192593757304,
   "end_elevation_m": 369.40675619109834,
   "start_xy": [
    922017.3592190965,
    6505892.64988122
   ],
   "end_xy": [
    922006.2064509908,
    6505909.096954056
   ]
  },
  "min_25m": {
   "gradient_pct": 1.3141100493132853,
   "start_distance_m": 52.0,
   "end_distance_m": 77.0,
   "midpoint_distance_m": 64.5,
   "start_elevation_m": 369.07822867877,
   "end_elevation_m": 369.40675619109834,
   "start_xy": [
    922020.9194645633,
    6505889.139232816
   ],
   "end_xy": [
    922006.2064509908,
    6505909.096954056
   ]
  },
  "min_50m": {
   "gradient_pct": 2.4558069964939477,
   "start_distance_m": 27.0,
   "end_distance_m": 77.0,
   "midpoint_distance_m": 52.0,
   "start_elevation_m": 368.17885269285136,
   "end_elevation_m": 369.40675619109834,
   "start_xy": [
    922038.6369719729,
    6505871.503326526
   ],
   "end_xy": [
    922006.2064509908,
    6505909.096954056
   ]
  },
  "min_100m": {
   "gradient_pct": 3.436836969029059,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 367.08682928783196,
   "end_elevation_m": 370.523666256861,
   "start_xy": [
    922057.349,
    6505852.039
   ],
   "end_xy": [
    921984.2587603343,
    6505902.584151925
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.739536701243424,
   "start_distance_m": 202.0,
   "end_distance_m": 204.0,
   "midpoint_distance_m": 203.0,
   "start_elevation_m": 383.87855531278507,
   "end_elevation_m": 384.33334604680994,
   "start_xy": [
    921884.0062493351,
    6505886.354571142
   ],
   "end_xy": [
    921882.0079399806,
    6505886.2723536035
   ]
  },
  "max_3m": {
   "gradient_pct": 22.622944838678904,
   "start_distance_m": 202.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 203.5,
   "start_elevation_m": 383.87855531278507,
   "end_elevation_m": 384.55724365794543,
   "start_xy": [
    921884.0062493351,
    6505886.354571142
   ],
   "end_xy": [
    921881.0087853033,
    6505886.231244835
   ]
  }
 },
 "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": 0.068,
   "obstruction_max_height_m": 11.93,
   "flagged_windows_m": [
    100
   ]
  },
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "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_E921-N6505_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E922-N6505_0m5.tif"
  ],
  "calculated_at": "2026-09-17T03:19:47+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps2",
  "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": [
   "E921-N6505",
   "E922-N6505"
  ],
  "elevation_blocks": [
   "21LHD6PL@2025-03-07"
  ],
  "ign_dalles": [
   "LHD_FXX_0921_6506_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0922_6506_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6PL"
  ],
  "ign_editions": [
   "2025-03-07"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0921_6506_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0922_6506_MNT_O_0M50_LAMB93_IGN69": "2025-03-07"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 3,
  "carriageway": {
   "stations": 22,
   "stations_resolved": 22,
   "width_median_m": 6.12,
   "width_p10_m": 5.03,
   "width_min_m": 3.75,
   "width_max_m": 10.25,
   "bounded_share": 0.136,
   "unbounded_share": 0.864,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.25,
   "window_m": [
    195.0,
    220.0
   ],
   "width_at_max25_m": 7.0,
   "window_stations": 6,
   "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": 22,
    "stations_resolved": 22,
    "width_median_m": 6.5,
    "width_p10_m": 4.78,
    "width_min_m": 3.25,
    "width_max_m": 10.5,
    "bounded_share": 0.682,
    "unbounded_share": 0.318,
    "confidence_median": 1.0,
    "width_median_bounded_m": 6.0,
    "window_m": [
     195.0,
     220.0
    ],
    "width_at_max25_m": 6.12,
    "window_stations": 6,
    "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": "Le Bourget-du-Lac",
  "county": "Savoie",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}