{
 "ocl_version": "0.1.0",
 "name": "Chemin du Boutet",
 "slug": "chemin-du-boutet",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.079396232964427,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 945.0,
   "end_distance_m": 947.0,
   "start_elevation_m": 459.2765224536762,
   "end_elevation_m": 459.8581103783355,
   "min_gradient_pct": -4.890949871969497
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.583705429392086,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 943.0,
   "end_distance_m": 946.0,
   "start_elevation_m": 458.7817079634207,
   "end_elevation_m": 459.60921912630243,
   "min_gradient_pct": -4.240956064084382
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.959653510029966,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 942.0,
   "end_distance_m": 947.0,
   "start_elevation_m": 458.510127702834,
   "end_elevation_m": 459.8581103783355,
   "min_gradient_pct": -3.985295268836353
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.446761454197713,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 937.0,
   "end_distance_m": 947.0,
   "start_elevation_m": 457.3134342329157,
   "end_elevation_m": 459.8581103783355,
   "min_gradient_pct": -3.2629448617632306
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.474826071340487,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 933.0,
   "end_distance_m": 953.0,
   "start_elevation_m": 456.3975946922965,
   "end_elevation_m": 461.2925599065646,
   "min_gradient_pct": -1.3731994079714127
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.984367499109112,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 928.0,
   "end_distance_m": 953.0,
   "start_elevation_m": 455.2964680317873,
   "end_elevation_m": 461.2925599065646,
   "min_gradient_pct": -0.48033152692278236
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.422899090551027,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 904.0,
   "end_distance_m": 954.0,
   "start_elevation_m": 450.2958194774617,
   "end_elevation_m": 461.5072690227372,
   "min_gradient_pct": 0.9166573272497089
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.493147437019047,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 898.0,
   "end_distance_m": 998.0,
   "start_elevation_m": 449.0107862882153,
   "end_elevation_m": 470.50393372523433,
   "min_gradient_pct": 1.1802287759121555
  }
 ],
 "shape": {
  "ascent_concentration": 0.472,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 270.0,
  "shape_class": "stepped"
 },
 "length_m": 1008.5843537495755,
 "start_elevation_m": 365.06668668579084,
 "end_elevation_m": 472.66233457033036,
 "endpoint_gain_m": 107.59564788453952,
 "overall_gradient_pct": 10.667987014128792,
 "accumulated_ascent_m": 108.14201187197301,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.959653510029966,
   "start_distance_m": 942.0,
   "end_distance_m": 947.0,
   "midpoint_distance_m": 944.5,
   "start_elevation_m": 458.510127702834,
   "end_elevation_m": 459.8581103783355,
   "start_xy": [
    918361.3242644839,
    6462957.623133621
   ],
   "end_xy": [
    918357.4098490358,
    6462960.733977832
   ]
  },
  "max_10m": {
   "gradient_pct": 25.446761454197713,
   "start_distance_m": 937.0,
   "end_distance_m": 947.0,
   "midpoint_distance_m": 942.0,
   "start_elevation_m": 457.3134342329157,
   "end_elevation_m": 459.8581103783355,
   "start_xy": [
    918365.1000674058,
    6462954.366842145
   ],
   "end_xy": [
    918357.4098490358,
    6462960.733977832
   ]
  },
  "max_20m": {
   "gradient_pct": 24.474826071340487,
   "start_distance_m": 933.0,
   "end_distance_m": 953.0,
   "midpoint_distance_m": 943.0,
   "start_elevation_m": 456.3975946922965,
   "end_elevation_m": 461.2925599065646,
   "start_xy": [
    918367.736470818,
    6462951.358623894
   ],
   "end_xy": [
    918352.7125504981,
    6462964.466990883
   ]
  },
  "max_25m": {
   "gradient_pct": 23.984367499109112,
   "start_distance_m": 928.0,
   "end_distance_m": 953.0,
   "midpoint_distance_m": 940.5,
   "start_elevation_m": 455.2964680317873,
   "end_elevation_m": 461.2925599065646,
   "start_xy": [
    918371.0319750833,
    6462947.59835108
   ],
   "end_xy": [
    918352.7125504981,
    6462964.466990883
   ]
  },
  "max_50m": {
   "gradient_pct": 22.422899090551027,
   "start_distance_m": 904.0,
   "end_distance_m": 954.0,
   "midpoint_distance_m": 929.0,
   "start_elevation_m": 450.2958194774617,
   "end_elevation_m": 461.5072690227372,
   "start_xy": [
    918386.8503955564,
    6462929.549041571
   ],
   "end_xy": [
    918351.9296674085,
    6462965.089159726
   ]
  },
  "max_100m": {
   "gradient_pct": 21.493147437019047,
   "start_distance_m": 898.0,
   "end_distance_m": 998.0,
   "midpoint_distance_m": 948.0,
   "start_elevation_m": 449.0107862882153,
   "end_elevation_m": 470.50393372523433,
   "start_xy": [
    918390.7608541765,
    6462925.000624125
   ],
   "end_xy": [
    918315.0858258198,
    6462988.155761481
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.985295268836353,
   "start_distance_m": 391.0,
   "end_distance_m": 396.0,
   "midpoint_distance_m": 393.5,
   "start_elevation_m": 398.4689671089243,
   "end_elevation_m": 398.2697023454825,
   "start_xy": [
    918773.5872523672,
    6462900.827193882
   ],
   "end_xy": [
    918770.7266772516,
    6462896.7263269
   ]
  },
  "min_10m": {
   "gradient_pct": -3.2629448617632306,
   "start_distance_m": 389.0,
   "end_distance_m": 399.0,
   "midpoint_distance_m": 394.0,
   "start_elevation_m": 398.5072857950389,
   "end_elevation_m": 398.1809913088626,
   "start_xy": [
    918774.7314824134,
    6462902.467540675
   ],
   "end_xy": [
    918769.0103321823,
    6462894.26580671
   ]
  },
  "min_20m": {
   "gradient_pct": -1.3731994079714127,
   "start_distance_m": 386.0,
   "end_distance_m": 406.0,
   "midpoint_distance_m": 396.0,
   "start_elevation_m": 398.44979369488993,
   "end_elevation_m": 398.17515381329565,
   "start_xy": [
    918776.4539313494,
    6462904.923783192
   ],
   "end_xy": [
    918764.6085782029,
    6462888.899793082
   ]
  },
  "min_25m": {
   "gradient_pct": -0.48033152692278236,
   "start_distance_m": 381.0,
   "end_distance_m": 406.0,
   "midpoint_distance_m": 393.5,
   "start_elevation_m": 398.29523669502635,
   "end_elevation_m": 398.17515381329565,
   "start_xy": [
    918779.3324363036,
    6462909.012084701
   ],
   "end_xy": [
    918764.6085782029,
    6462888.899793082
   ]
  },
  "min_50m": {
   "gradient_pct": 0.9166573272497089,
   "start_distance_m": 593.0,
   "end_distance_m": 643.0,
   "midpoint_distance_m": 618.0,
   "start_elevation_m": 415.41645891634596,
   "end_elevation_m": 415.8747875799708,
   "start_xy": [
    918607.567583709,
    6462891.133071664
   ],
   "end_xy": [
    918568.0978311445,
    6462860.475317393
   ]
  },
  "min_100m": {
   "gradient_pct": 1.1802287759121555,
   "start_distance_m": 565.0,
   "end_distance_m": 665.0,
   "midpoint_distance_m": 615.0,
   "start_elevation_m": 414.9252235405619,
   "end_elevation_m": 416.10545231647404,
   "start_xy": [
    918630.113605177,
    6462907.736592855
   ],
   "end_xy": [
    918550.3058848917,
    6462847.535199599
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.079396232964427,
   "start_distance_m": 945.0,
   "end_distance_m": 947.0,
   "midpoint_distance_m": 946.0,
   "start_elevation_m": 459.2765224536762,
   "end_elevation_m": 459.8581103783355,
   "start_xy": [
    918358.975615215,
    6462959.489640147
   ],
   "end_xy": [
    918357.4098490358,
    6462960.733977832
   ]
  },
  "max_3m": {
   "gradient_pct": 27.583705429392086,
   "start_distance_m": 943.0,
   "end_distance_m": 946.0,
   "midpoint_distance_m": 944.5,
   "start_elevation_m": 458.7817079634207,
   "end_elevation_m": 459.60921912630243,
   "start_xy": [
    918360.5413813943,
    6462958.245302464
   ],
   "end_xy": [
    918358.1927321254,
    6462960.111808989
   ]
  }
 },
 "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": 0.149,
   "obstruction_max_height_m": 15.24,
   "flagged_windows_m": [
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "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_E918-N6462_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E918-N6463_0m5.tif"
  ],
  "calculated_at": "2026-09-17T03:17:08+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": [
   "E918-N6462",
   "E918-N6463"
  ],
  "elevation_blocks": [
   "21LHD6PM@2025-03-25"
  ],
  "ign_dalles": [
   "LHD_FXX_0918_6463_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0918_6464_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6PM"
  ],
  "ign_editions": [
   "2025-03-25"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0918_6463_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0918_6464_MNT_O_0M50_LAMB93_IGN69": "2025-03-25"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 9,
  "carriageway": {
   "stations": 47,
   "stations_resolved": 47,
   "width_median_m": 5.5,
   "width_p10_m": 3.75,
   "width_min_m": 2.75,
   "width_max_m": 11.0,
   "bounded_share": 0.34,
   "unbounded_share": 0.66,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.38,
   "window_m": [
    928.0,
    953.0
   ],
   "width_at_max25_m": 6.75,
   "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": 47,
    "stations_resolved": 47,
    "width_median_m": 4.0,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 11.5,
    "bounded_share": 0.851,
    "unbounded_share": 0.149,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.5,
    "window_m": [
     928.0,
     953.0
    ],
    "width_at_max25_m": 2.5,
    "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": "Meylan",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}