{
 "ocl_version": "0.1.0",
 "name": "Chemin du Colombier",
 "slug": "chemin-du-colombier",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.543108804350823,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 857.0,
   "end_distance_m": 859.0,
   "start_elevation_m": 549.0320557730215,
   "end_elevation_m": 549.5429179491085,
   "min_gradient_pct": -7.114477508508799
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.529751981006484,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 857.0,
   "end_distance_m": 860.0,
   "start_elevation_m": 549.0320557730215,
   "end_elevation_m": 549.6779483324517,
   "min_gradient_pct": -3.942394812664437
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 19.76616816314845,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1182.0,
   "end_distance_m": 1187.0,
   "start_elevation_m": 588.0492798636037,
   "end_elevation_m": 589.0375882717611,
   "min_gradient_pct": 0.33842245829646345
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 17.183851280636873,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 637.0,
   "end_distance_m": 647.0,
   "start_elevation_m": 520.4614960788518,
   "end_elevation_m": 522.1798812069155,
   "min_gradient_pct": 0.8033638191363934
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 16.064546684199854,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 751.0,
   "end_distance_m": 771.0,
   "start_elevation_m": 536.4969629206721,
   "end_elevation_m": 539.7098722575121,
   "min_gradient_pct": 1.510688694341411
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 15.774010357001771,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 746.0,
   "end_distance_m": 771.0,
   "start_elevation_m": 535.7663696682616,
   "end_elevation_m": 539.7098722575121,
   "min_gradient_pct": 1.8345297862372263
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 14.955738088897533,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 722.0,
   "end_distance_m": 772.0,
   "start_elevation_m": 532.3761343126571,
   "end_elevation_m": 539.8540033571059,
   "min_gradient_pct": 3.3701285394698743
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.104706806140939,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 673.0,
   "end_distance_m": 773.0,
   "start_elevation_m": 525.875805128379,
   "end_elevation_m": 539.98051193452,
   "min_gradient_pct": 6.424440139425997
  }
 ],
 "shape": {
  "ascent_concentration": 0.299,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 360.0,
  "shape_class": "sustained"
 },
 "length_m": 1748.176121795679,
 "start_elevation_m": 453.20071182226576,
 "end_elevation_m": 640.9786905390735,
 "endpoint_gain_m": 187.7779787168077,
 "overall_gradient_pct": 10.74136503614563,
 "accumulated_ascent_m": 188.27956000597703,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 19.76616816314845,
   "start_distance_m": 1182.0,
   "end_distance_m": 1187.0,
   "midpoint_distance_m": 1184.5,
   "start_elevation_m": 588.0492798636037,
   "end_elevation_m": 589.0375882717611,
   "start_xy": [
    939342.4464318715,
    6318981.194629242
   ],
   "end_xy": [
    939347.4382447626,
    6318981.480643333
   ]
  },
  "max_10m": {
   "gradient_pct": 17.183851280636873,
   "start_distance_m": 637.0,
   "end_distance_m": 647.0,
   "midpoint_distance_m": 642.0,
   "start_elevation_m": 520.4614960788518,
   "end_elevation_m": 522.1798812069155,
   "start_xy": [
    939140.5259384044,
    6319174.000327608
   ],
   "end_xy": [
    939150.1525304986,
    6319171.44987268
   ]
  },
  "max_20m": {
   "gradient_pct": 16.064546684199854,
   "start_distance_m": 751.0,
   "end_distance_m": 771.0,
   "midpoint_distance_m": 761.0,
   "start_elevation_m": 536.4969629206721,
   "end_elevation_m": 539.7098722575121,
   "start_xy": [
    939252.7780937213,
    6319173.390379202
   ],
   "end_xy": [
    939271.5173194779,
    6319180.379042739
   ]
  },
  "max_25m": {
   "gradient_pct": 15.774010357001771,
   "start_distance_m": 746.0,
   "end_distance_m": 771.0,
   "midpoint_distance_m": 758.5,
   "start_elevation_m": 535.7663696682616,
   "end_elevation_m": 539.7098722575121,
   "start_xy": [
    939248.0662489136,
    6319171.749599978
   ],
   "end_xy": [
    939271.5173194779,
    6319180.379042739
   ]
  },
  "max_50m": {
   "gradient_pct": 14.955738088897533,
   "start_distance_m": 722.0,
   "end_distance_m": 772.0,
   "midpoint_distance_m": 747.0,
   "start_elevation_m": 532.3761343126571,
   "end_elevation_m": 539.8540033571059,
   "start_xy": [
    939224.3037479968,
    6319168.381581247
   ],
   "end_xy": [
    939272.4542807657,
    6319180.728475916
   ]
  },
  "max_100m": {
   "gradient_pct": 14.104706806140939,
   "start_distance_m": 673.0,
   "end_distance_m": 773.0,
   "midpoint_distance_m": 723.0,
   "start_elevation_m": 525.875805128379,
   "end_elevation_m": 539.98051193452,
   "start_xy": [
    939175.6457416767,
    6319166.5629687365
   ],
   "end_xy": [
    939273.3424757567,
    6319181.181153747
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.33842245829646345,
   "start_distance_m": 861.0,
   "end_distance_m": 866.0,
   "midpoint_distance_m": 863.5,
   "start_elevation_m": 549.7982297870979,
   "end_elevation_m": 549.8151509100127,
   "start_xy": [
    939331.0426779643,
    6319199.998496656
   ],
   "end_xy": [
    939328.4889829422,
    6319195.699817588
   ]
  },
  "min_10m": {
   "gradient_pct": 0.8033638191363934,
   "start_distance_m": 9.0,
   "end_distance_m": 19.0,
   "midpoint_distance_m": 14.0,
   "start_elevation_m": 453.44173628488954,
   "end_elevation_m": 453.5220726668032,
   "start_xy": [
    938744.6295936864,
    6319595.023217344
   ],
   "end_xy": [
    938746.2266697527,
    6319585.157490848
   ]
  },
  "min_20m": {
   "gradient_pct": 1.510688694341411,
   "start_distance_m": 5.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 15.0,
   "start_elevation_m": 453.35987001858666,
   "end_elevation_m": 453.66200775745494,
   "start_xy": [
    938743.9337742702,
    6319598.962231858
   ],
   "end_xy": [
    938746.7009671443,
    6319579.176266727
   ]
  },
  "min_25m": {
   "gradient_pct": 1.8345297862372263,
   "start_distance_m": 5.0,
   "end_distance_m": 30.0,
   "midpoint_distance_m": 17.5,
   "start_elevation_m": 453.35987001858666,
   "end_elevation_m": 453.81850246514597,
   "start_xy": [
    938743.9337742702,
    6319598.962231858
   ],
   "end_xy": [
    938747.0962149708,
    6319574.191913293
   ]
  },
  "min_50m": {
   "gradient_pct": 3.3701285394698743,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 453.20071182226576,
   "end_elevation_m": 454.8857760920007,
   "start_xy": [
    938743.064,
    6319603.886
   ],
   "end_xy": [
    938749.0142865507,
    6319554.286954198
   ]
  },
  "min_100m": {
   "gradient_pct": 6.424440139425997,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 453.20071182226576,
   "end_elevation_m": 459.62515196169176,
   "start_xy": [
    938743.064,
    6319603.886
   ],
   "end_xy": [
    938754.081637695,
    6319504.617075609
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.543108804350823,
   "start_distance_m": 857.0,
   "end_distance_m": 859.0,
   "midpoint_distance_m": 858.0,
   "start_elevation_m": 549.0320557730215,
   "end_elevation_m": 549.5429179491085,
   "start_xy": [
    939331.8126329279,
    6319203.877555171
   ],
   "end_xy": [
    939331.5539829489,
    6319201.894350646
   ]
  },
  "max_3m": {
   "gradient_pct": 21.529751981006484,
   "start_distance_m": 857.0,
   "end_distance_m": 860.0,
   "midpoint_distance_m": 858.5,
   "start_elevation_m": 549.0320557730215,
   "end_elevation_m": 549.6779483324517,
   "start_xy": [
    939331.8126329279,
    6319203.877555171
   ],
   "end_xy": [
    939331.4246579594,
    6319200.902748384
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.012,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.059,
   "obstruction_max_height_m": 12.13,
   "flagged_windows_m": [
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    20.0
   ]
  ],
  "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_E938-N6319_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E939-N6318_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E939-N6319_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:47:06+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": [
   "E938-N6319",
   "E939-N6318",
   "E939-N6319"
  ],
  "elevation_blocks": [
   "21LHD7QP@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_0938_6320_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0939_6319_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0939_6320_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD7QP"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0938_6320_MNT_O_0M50_LAMB93_IGN69": "2025-04-02",
   "LHD_FXX_0939_6319_MNT_O_0M50_LAMB93_IGN69": "2025-04-02",
   "LHD_FXX_0939_6320_MNT_O_0M50_LAMB93_IGN69": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "structure_mask_ranges_m": [
   [
    0.0,
    15.0
   ]
  ],
  "carriageway": {
   "stations": 76,
   "stations_resolved": 76,
   "width_median_m": 5.75,
   "width_p10_m": 3.12,
   "width_min_m": 1.25,
   "width_max_m": 12.0,
   "bounded_share": 0.434,
   "unbounded_share": 0.566,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.5,
   "window_m": [
    746.0,
    771.0
   ],
   "width_at_max25_m": 5.5,
   "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": 76,
    "stations_resolved": 76,
    "width_median_m": 6.75,
    "width_p10_m": 1.75,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.737,
    "unbounded_share": 0.263,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.88,
    "window_m": [
     746.0,
     771.0
    ],
    "width_at_max25_m": 1.0,
    "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": "Le Castellet",
  "county": "Alpes-de-Haute-Provence",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}