{
 "ocl_version": "0.1.0",
 "name": "Chemin du Berger",
 "slug": "chemin-du-berger",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.76810779705431,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 169.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 344.2420720352651,
   "end_elevation_m": 345.1374341912062,
   "min_gradient_pct": -2.2887909473041645
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.9314184930015,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 168.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 343.96949163641614,
   "end_elevation_m": 345.1374341912062,
   "min_gradient_pct": -2.105906942538619
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.66840745877903,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 175.0,
   "end_distance_m": 180.0,
   "start_elevation_m": 345.49933928265864,
   "end_elevation_m": 347.2327596555976,
   "min_gradient_pct": 0.1873174756769913
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.680134159218596,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 175.0,
   "end_distance_m": 185.0,
   "start_elevation_m": 345.49933928265864,
   "end_elevation_m": 348.4673526985805,
   "min_gradient_pct": 2.1653185056140956
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.621161664813826,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 167.0,
   "end_distance_m": 187.0,
   "start_elevation_m": 343.70081807933354,
   "end_elevation_m": 349.0250504122963,
   "min_gradient_pct": 2.4452154333948783
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.120319835160217,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 166.0,
   "end_distance_m": 191.0,
   "start_elevation_m": 343.471401108793,
   "end_elevation_m": 349.75148106758303,
   "min_gradient_pct": 2.5730528860660797
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.5438570952565,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 218.0,
   "end_distance_m": 268.0,
   "start_elevation_m": 353.28500384036624,
   "end_elevation_m": 364.5569323879945,
   "min_gradient_pct": 4.733213644504644
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.650883906005046,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 207.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 351.04560696033326,
   "end_elevation_m": 372.6964908663383,
   "min_gradient_pct": 7.593178047612582
  }
 ],
 "shape": {
  "ascent_concentration": 0.354,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 122.0,
  "shape_class": "sustained"
 },
 "length_m": 310.9463918987627,
 "start_elevation_m": 325.11335694153274,
 "end_elevation_m": 373.224917761212,
 "endpoint_gain_m": 48.111560819679255,
 "overall_gradient_pct": 15.472622314698963,
 "accumulated_ascent_m": 48.33939302636003,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.66840745877903,
   "start_distance_m": 175.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 177.5,
   "start_elevation_m": 345.49933928265864,
   "end_elevation_m": 347.2327596555976,
   "start_xy": [
    910130.4302059037,
    6490436.917614624
   ],
   "end_xy": [
    910125.4828224959,
    6490436.194152519
   ]
  },
  "max_10m": {
   "gradient_pct": 29.680134159218596,
   "start_distance_m": 175.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 180.0,
   "start_elevation_m": 345.49933928265864,
   "end_elevation_m": 348.4673526985805,
   "start_xy": [
    910130.4302059037,
    6490436.917614624
   ],
   "end_xy": [
    910120.5354390881,
    6490435.470690415
   ]
  },
  "max_20m": {
   "gradient_pct": 26.621161664813826,
   "start_distance_m": 167.0,
   "end_distance_m": 187.0,
   "midpoint_distance_m": 177.0,
   "start_elevation_m": 343.70081807933354,
   "end_elevation_m": 349.0250504122963,
   "start_xy": [
    910138.3800400888,
    6490437.248577716
   ],
   "end_xy": [
    910118.556485725,
    6490435.181305573
   ]
  },
  "max_25m": {
   "gradient_pct": 25.120319835160217,
   "start_distance_m": 166.0,
   "end_distance_m": 191.0,
   "midpoint_distance_m": 178.5,
   "start_elevation_m": 343.471401108793,
   "end_elevation_m": 349.75148106758303,
   "start_xy": [
    910139.3780605664,
    6490437.18568792
   ],
   "end_xy": [
    910114.5985789988,
    6490434.6025358895
   ]
  },
  "max_50m": {
   "gradient_pct": 22.5438570952565,
   "start_distance_m": 218.0,
   "end_distance_m": 268.0,
   "midpoint_distance_m": 243.0,
   "start_elevation_m": 353.28500384036624,
   "end_elevation_m": 364.5569323879945,
   "start_xy": [
    910087.9512750314,
    6490434.753439789
   ],
   "end_xy": [
    910045.1636355742,
    6490459.417838078
   ]
  },
  "max_100m": {
   "gradient_pct": 21.650883906005046,
   "start_distance_m": 207.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 257.0,
   "start_elevation_m": 351.04560696033326,
   "end_elevation_m": 372.6964908663383,
   "start_xy": [
    910098.7755284732,
    6490432.7949869735
   ],
   "end_xy": [
    910018.9630564572,
    6490487.650693159
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.1873174756769913,
   "start_distance_m": 199.0,
   "end_distance_m": 204.0,
   "midpoint_distance_m": 201.5,
   "start_elevation_m": 350.72426231084114,
   "end_elevation_m": 350.733628184625,
   "start_xy": [
    910106.6827655464,
    6490433.444996523
   ],
   "end_xy": [
    910101.7353821386,
    6490432.721534418
   ]
  },
  "min_10m": {
   "gradient_pct": 2.1653185056140956,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 325.11335694153274,
   "end_elevation_m": 325.32988879209415,
   "start_xy": [
    910246.371,
    6490319.531
   ],
   "end_xy": [
    910241.7259466429,
    6490328.3090114845
   ]
  },
  "min_20m": {
   "gradient_pct": 2.4452154333948783,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 325.11335694153274,
   "end_elevation_m": 325.6024000282117,
   "start_xy": [
    910246.371,
    6490319.531
   ],
   "end_xy": [
    910236.1355814127,
    6490336.600441795
   ]
  },
  "min_25m": {
   "gradient_pct": 2.5730528860660797,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 325.11335694153274,
   "end_elevation_m": 325.75662016304926,
   "start_xy": [
    910246.371,
    6490319.531
   ],
   "end_xy": [
    910233.3403987975,
    6490340.7461569505
   ]
  },
  "min_50m": {
   "gradient_pct": 4.733213644504644,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 325.11335694153274,
   "end_elevation_m": 327.47996376378507,
   "start_xy": [
    910246.371,
    6490319.531
   ],
   "end_xy": [
    910214.7040667539,
    6490357.270535563
   ]
  },
  "min_100m": {
   "gradient_pct": 7.593178047612582,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 325.11335694153274,
   "end_elevation_m": 332.7065349891453,
   "start_xy": [
    910246.371,
    6490319.531
   ],
   "end_xy": [
    910176.0346829586,
    6490385.002351725
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.76810779705431,
   "start_distance_m": 169.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 170.0,
   "start_elevation_m": 344.2420720352651,
   "end_elevation_m": 345.1374341912062,
   "start_xy": [
    910136.3839991336,
    6490437.374357306
   ],
   "end_xy": [
    910134.3881126299,
    6490437.496384307
   ]
  },
  "max_3m": {
   "gradient_pct": 38.9314184930015,
   "start_distance_m": 168.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 169.5,
   "start_elevation_m": 343.96949163641614,
   "end_elevation_m": 345.1374341912062,
   "start_xy": [
    910137.3820196112,
    6490437.311467511
   ],
   "end_xy": [
    910134.3881126299,
    6490437.496384307
   ]
  }
 },
 "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": 0.314,
   "obstruction_max_height_m": 23.05,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25
   ]
  },
  "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_E909-N6490_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E910-N6490_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:44:52+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": [
   "E909-N6490",
   "E910-N6490"
  ],
  "elevation_blocks": [
   "21LHD6PL@2025-03-07"
  ],
  "ign_dalles": [
   "LHD_FXX_0909_6491_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0910_6491_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6PL"
  ],
  "ign_editions": [
   "2025-03-07"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0909_6491_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0910_6491_MNT_O_0M50_LAMB93_IGN69": "2025-03-07"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 19,
   "stations_resolved": 19,
   "width_median_m": 4.25,
   "width_p10_m": 2.35,
   "width_min_m": 1.75,
   "width_max_m": 12.0,
   "bounded_share": 0.158,
   "unbounded_share": 0.842,
   "confidence_median": 0.0,
   "width_median_bounded_m": 2.5,
   "window_m": [
    166.0,
    191.0
   ],
   "width_at_max25_m": 3.25,
   "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": 19,
    "stations_resolved": 19,
    "width_median_m": 3.5,
    "width_p10_m": 0.9,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.895,
    "unbounded_share": 0.105,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.0,
    "window_m": [
     166.0,
     191.0
    ],
    "width_at_max25_m": 1.25,
    "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": "Saint-Bueil",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}