{
 "ocl_version": "0.1.0",
 "name": "Chemin de Chez la Soeur",
 "slug": "chemin-de-chez-la-soeur",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.747853337753668,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 37.0,
   "end_distance_m": 39.0,
   "start_elevation_m": 1015.6243874947958,
   "end_elevation_m": 1016.1393445615508,
   "min_gradient_pct": 1.8043501850684152
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.58040869556923,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 221.0,
   "end_distance_m": 224.0,
   "start_elevation_m": 1039.6718516261317,
   "end_elevation_m": 1040.4692638869988,
   "min_gradient_pct": 3.043966963340002
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.94027524861849,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 219.0,
   "end_distance_m": 224.0,
   "start_elevation_m": 1039.2222501245678,
   "end_elevation_m": 1040.4692638869988,
   "min_gradient_pct": 4.887061614522281
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.27740483249272,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 218.0,
   "end_distance_m": 228.0,
   "start_elevation_m": 1039.0254960524703,
   "end_elevation_m": 1041.3532365357196,
   "min_gradient_pct": 6.762949632309301
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.855234226372886,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 218.0,
   "end_distance_m": 238.0,
   "start_elevation_m": 1039.0254960524703,
   "end_elevation_m": 1043.396542897745,
   "min_gradient_pct": 7.541876773041167
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.564627991519956,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 213.0,
   "end_distance_m": 238.0,
   "start_elevation_m": 1038.005385899865,
   "end_elevation_m": 1043.396542897745,
   "min_gradient_pct": 7.531532776846689
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.824578639948868,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 195.0,
   "end_distance_m": 245.0,
   "start_elevation_m": 1034.8673462379345,
   "end_elevation_m": 1044.779635557909,
   "min_gradient_pct": 8.357156682795448
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.157013995628176,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "start_elevation_m": 1008.8459345703632,
   "end_elevation_m": 1026.0029485659913,
   "min_gradient_pct": 9.192633609734457
  }
 ],
 "shape": {
  "ascent_concentration": 0.335,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 100.0,
  "shape_class": "sustained"
 },
 "length_m": 263.1570798719688,
 "start_elevation_m": 1008.8459345703632,
 "end_elevation_m": 1046.6308141205955,
 "endpoint_gain_m": 37.78487955023229,
 "overall_gradient_pct": 14.358298689366592,
 "accumulated_ascent_m": 37.82344049501444,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.94027524861849,
   "start_distance_m": 219.0,
   "end_distance_m": 224.0,
   "midpoint_distance_m": 221.5,
   "start_elevation_m": 1039.2222501245678,
   "end_elevation_m": 1040.4692638869988,
   "start_xy": [
    964944.4437266553,
    6571442.621516206
   ],
   "end_xy": [
    964948.0972691696,
    6571439.208068228
   ]
  },
  "max_10m": {
   "gradient_pct": 23.27740483249272,
   "start_distance_m": 218.0,
   "end_distance_m": 228.0,
   "midpoint_distance_m": 223.0,
   "start_elevation_m": 1039.0254960524703,
   "end_elevation_m": 1041.3532365357196,
   "start_xy": [
    964943.7130181525,
    6571443.304205801
   ],
   "end_xy": [
    964951.0201031811,
    6571436.477309846
   ]
  },
  "max_20m": {
   "gradient_pct": 21.855234226372886,
   "start_distance_m": 218.0,
   "end_distance_m": 238.0,
   "midpoint_distance_m": 228.0,
   "start_elevation_m": 1039.0254960524703,
   "end_elevation_m": 1043.396542897745,
   "start_xy": [
    964943.7130181525,
    6571443.304205801
   ],
   "end_xy": [
    964958.2766092558,
    6571429.599279329
   ]
  },
  "max_25m": {
   "gradient_pct": 21.564627991519956,
   "start_distance_m": 213.0,
   "end_distance_m": 238.0,
   "midpoint_distance_m": 225.5,
   "start_elevation_m": 1038.005385899865,
   "end_elevation_m": 1043.396542897745,
   "start_xy": [
    964940.0594756382,
    6571446.717653779
   ],
   "end_xy": [
    964958.2766092558,
    6571429.599279329
   ]
  },
  "max_50m": {
   "gradient_pct": 19.824578639948868,
   "start_distance_m": 195.0,
   "end_distance_m": 245.0,
   "midpoint_distance_m": 220.0,
   "start_elevation_m": 1034.8673462379345,
   "end_elevation_m": 1044.779635557909,
   "start_xy": [
    964926.8721157778,
    6571458.968913758
   ],
   "end_xy": [
    964962.6716168962,
    6571424.191198155
   ]
  },
  "max_100m": {
   "gradient_pct": 17.157013995628176,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 1008.8459345703632,
   "end_elevation_m": 1026.0029485659913,
   "start_xy": [
    964838.9,
    6571624.868
   ],
   "end_xy": [
    964864.7896013929,
    6571530.322161583
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 4.887061614522281,
   "start_distance_m": 123.0,
   "end_distance_m": 128.0,
   "midpoint_distance_m": 125.5,
   "start_elevation_m": 1027.850944073148,
   "end_elevation_m": 1028.095297153874,
   "start_xy": [
    964877.0776359414,
    6571510.94496129
   ],
   "end_xy": [
    964880.4339987823,
    6571507.238908338
   ]
  },
  "min_10m": {
   "gradient_pct": 6.762949632309301,
   "start_distance_m": 123.0,
   "end_distance_m": 133.0,
   "midpoint_distance_m": 128.0,
   "start_elevation_m": 1027.850944073148,
   "end_elevation_m": 1028.527239036379,
   "start_xy": [
    964877.0776359414,
    6571510.94496129
   ],
   "end_xy": [
    964883.790361623,
    6571503.532855387
   ]
  },
  "min_20m": {
   "gradient_pct": 7.541876773041167,
   "start_distance_m": 108.0,
   "end_distance_m": 128.0,
   "midpoint_distance_m": 118.0,
   "start_elevation_m": 1026.5869217992658,
   "end_elevation_m": 1028.095297153874,
   "start_xy": [
    964868.883236216,
    6571523.448868781
   ],
   "end_xy": [
    964880.4339987823,
    6571507.238908338
   ]
  },
  "min_25m": {
   "gradient_pct": 7.531532776846689,
   "start_distance_m": 103.0,
   "end_distance_m": 128.0,
   "midpoint_distance_m": 115.5,
   "start_elevation_m": 1026.2124139596624,
   "end_elevation_m": 1028.095297153874,
   "start_xy": [
    964866.3247144517,
    6571527.744676783
   ],
   "end_xy": [
    964880.4339987823,
    6571507.238908338
   ]
  },
  "min_50m": {
   "gradient_pct": 8.357156682795448,
   "start_distance_m": 95.0,
   "end_distance_m": 145.0,
   "midpoint_distance_m": 120.0,
   "start_elevation_m": 1025.5367861389,
   "end_elevation_m": 1029.7153644802977,
   "start_xy": [
    964862.277491123,
    6571534.644264295
   ],
   "end_xy": [
    964891.845632441,
    6571494.638328303
   ]
  },
  "min_100m": {
   "gradient_pct": 9.192633609734457,
   "start_distance_m": 85.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 135.0,
   "start_elevation_m": 1024.4301329665911,
   "end_elevation_m": 1033.6227665763256,
   "start_xy": [
    964857.5380623884,
    6571543.449820227
   ],
   "end_xy": [
    964919.7569653215,
    6571465.990067479
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.747853337753668,
   "start_distance_m": 37.0,
   "end_distance_m": 39.0,
   "midpoint_distance_m": 38.0,
   "start_elevation_m": 1015.6243874947958,
   "end_elevation_m": 1016.1393445615508,
   "start_xy": [
    964851.6161482433,
    6571590.295359527
   ],
   "end_xy": [
    964852.5853412923,
    6571588.545883939
   ]
  },
  "max_3m": {
   "gradient_pct": 26.58040869556923,
   "start_distance_m": 221.0,
   "end_distance_m": 224.0,
   "midpoint_distance_m": 222.5,
   "start_elevation_m": 1039.6718516261317,
   "end_elevation_m": 1040.4692638869988,
   "start_xy": [
    964945.9051436611,
    6571441.256137015
   ],
   "end_xy": [
    964948.0972691696,
    6571439.208068228
   ]
  }
 },
 "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": 0.657,
   "obstruction_max_height_m": 19.19,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    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_E964-N6571_0m5.tif"
  ],
  "calculated_at": "2026-09-17T03:57:20+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps3",
  "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": [
   "E964-N6571"
  ],
  "elevation_blocks": [
   "21LHD5QK2@2025-06-13"
  ],
  "ign_dalles": [
   "LHD_FXX_0964_6572_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD5QK2"
  ],
  "ign_editions": [
   "2025-06-13"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0964_6572_MNT_O_0M50_LAMB93_IGN69": "2025-06-13"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 17,
   "stations_resolved": 17,
   "width_median_m": 5.0,
   "width_p10_m": 3.3,
   "width_min_m": 3.0,
   "width_max_m": 11.25,
   "bounded_share": 0.294,
   "unbounded_share": 0.706,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.0,
   "window_m": [
    213.0,
    238.0
   ],
   "width_at_max25_m": 7.75,
   "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": 17,
    "stations_resolved": 17,
    "width_median_m": 1.75,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 8.75,
    "bounded_share": 0.941,
    "unbounded_share": 0.059,
    "confidence_median": 1.0,
    "width_median_bounded_m": 1.62,
    "window_m": [
     213.0,
     238.0
    ],
    "width_at_max25_m": 2.0,
    "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": "Bog\u00e8ve",
  "county": "Haute-Savoie",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}