{
 "ocl_version": "0.1.0",
 "name": "Chemin de la Voie Romaine",
 "slug": "chemin-de-la-voie-romaine-2",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 41.86971282207708,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 999.0,
   "end_distance_m": 1001.0,
   "start_elevation_m": 330.06514467057264,
   "end_elevation_m": 330.9025389270142,
   "min_gradient_pct": -32.989192219395136,
   "suppressed_max_gradient_pct": 63.25080145759614,
   "suppressed_location_m": [
    808.0,
    810.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.588984803390154,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 998.0,
   "end_distance_m": 1001.0,
   "start_elevation_m": 329.8348693829125,
   "end_elevation_m": 330.9025389270142,
   "min_gradient_pct": -30.59625489275201,
   "suppressed_max_gradient_pct": 50.023321687304666,
   "suppressed_location_m": [
    938.0,
    941.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.966316207599675,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 996.0,
   "end_distance_m": 1001.0,
   "start_elevation_m": 329.5042231166342,
   "end_elevation_m": 330.9025389270142,
   "min_gradient_pct": -15.460668142601435,
   "suppressed_max_gradient_pct": 36.62272720713645,
   "suppressed_location_m": [
    937.0,
    942.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.202435997444013,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 991.0,
   "end_distance_m": 1001.0,
   "start_elevation_m": 328.5822953272698,
   "end_elevation_m": 330.9025389270142,
   "min_gradient_pct": -7.425414229285252,
   "suppressed_max_gradient_pct": 24.95408378569266,
   "suppressed_location_m": [
    937.0,
    947.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.26841383872602,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 981.0,
   "end_distance_m": 1001.0,
   "start_elevation_m": 326.648856159269,
   "end_elevation_m": 330.9025389270142,
   "min_gradient_pct": -3.4068912704699983
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.51069580590479,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 976.0,
   "end_distance_m": 1001.0,
   "start_elevation_m": 325.774864975538,
   "end_elevation_m": 330.9025389270142,
   "min_gradient_pct": -2.6851108167043094
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.578892632575275,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1010.0,
   "end_distance_m": 1060.0,
   "start_elevation_m": 332.1987113767516,
   "end_elevation_m": 341.4881576930392,
   "min_gradient_pct": -1.7532653760609946
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.33706517593896,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 961.0,
   "end_distance_m": 1061.0,
   "start_elevation_m": 323.33319799352535,
   "end_elevation_m": 341.6702631694643,
   "min_gradient_pct": 0.43022508234707857
  }
 ],
 "shape": {
  "ascent_concentration": 0.382,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 146.0,
  "shape_class": "sustained"
 },
 "length_m": 1121.2810307963928,
 "start_elevation_m": 254.63470313073236,
 "end_elevation_m": 349.7755406595818,
 "endpoint_gain_m": 95.14083752884943,
 "overall_gradient_pct": 8.485012669952635,
 "accumulated_ascent_m": 102.17079877776104,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.966316207599675,
   "start_distance_m": 996.0,
   "end_distance_m": 1001.0,
   "midpoint_distance_m": 998.5,
   "start_elevation_m": 329.5042231166342,
   "end_elevation_m": 330.9025389270142,
   "start_xy": [
    1009538.5547508863,
    6289227.869192567
   ],
   "end_xy": [
    1009533.6721981107,
    6289226.791844714
   ]
  },
  "max_10m": {
   "gradient_pct": 23.202435997444013,
   "start_distance_m": 991.0,
   "end_distance_m": 1001.0,
   "midpoint_distance_m": 996.0,
   "start_elevation_m": 328.5822953272698,
   "end_elevation_m": 330.9025389270142,
   "start_xy": [
    1009543.158970812,
    6289229.783763876
   ],
   "end_xy": [
    1009533.6721981107,
    6289226.791844714
   ]
  },
  "max_20m": {
   "gradient_pct": 21.26841383872602,
   "start_distance_m": 981.0,
   "end_distance_m": 1001.0,
   "midpoint_distance_m": 991.0,
   "start_elevation_m": 326.648856159269,
   "end_elevation_m": 330.9025389270142,
   "start_xy": [
    1009552.2704565512,
    6289233.904543854
   ],
   "end_xy": [
    1009533.6721981107,
    6289226.791844714
   ]
  },
  "max_25m": {
   "gradient_pct": 20.51069580590479,
   "start_distance_m": 976.0,
   "end_distance_m": 1001.0,
   "midpoint_distance_m": 988.5,
   "start_elevation_m": 325.774864975538,
   "end_elevation_m": 330.9025389270142,
   "start_xy": [
    1009556.8261994208,
    6289235.964933842
   ],
   "end_xy": [
    1009533.6721981107,
    6289226.791844714
   ]
  },
  "max_50m": {
   "gradient_pct": 18.578892632575275,
   "start_distance_m": 1010.0,
   "end_distance_m": 1060.0,
   "midpoint_distance_m": 1035.0,
   "start_elevation_m": 332.1987113767516,
   "end_elevation_m": 341.4881576930392,
   "start_xy": [
    1009524.8836031148,
    6289224.852618581
   ],
   "end_xy": [
    1009493.1349995224,
    6289243.726435915
   ]
  },
  "max_100m": {
   "gradient_pct": 18.33706517593896,
   "start_distance_m": 961.0,
   "end_distance_m": 1061.0,
   "midpoint_distance_m": 1011.0,
   "start_elevation_m": 323.33319799352535,
   "end_elevation_m": 341.6702631694643,
   "start_xy": [
    1009570.4934280296,
    6289242.14610381
   ],
   "end_xy": [
    1009493.8571656134,
    6289244.41815561
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -15.460668142601435,
   "start_distance_m": 284.0,
   "end_distance_m": 289.0,
   "midpoint_distance_m": 286.5,
   "start_elevation_m": 268.55523268574996,
   "end_elevation_m": 267.7821992786199,
   "start_xy": [
    1010044.37453438,
    6289364.415632432
   ],
   "end_xy": [
    1010039.6206970476,
    6289362.866106499
   ]
  },
  "min_10m": {
   "gradient_pct": -7.425414229285252,
   "start_distance_m": 284.0,
   "end_distance_m": 294.0,
   "midpoint_distance_m": 289.0,
   "start_elevation_m": 268.55523268574996,
   "end_elevation_m": 267.81269126282143,
   "start_xy": [
    1010044.37453438,
    6289364.415632432
   ],
   "end_xy": [
    1010034.866859715,
    6289361.316580567
   ]
  },
  "min_20m": {
   "gradient_pct": -3.4068912704699983,
   "start_distance_m": 284.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 294.0,
   "start_elevation_m": 268.55523268574996,
   "end_elevation_m": 267.87385443165596,
   "start_xy": [
    1010044.37453438,
    6289364.415632432
   ],
   "end_xy": [
    1010025.1755663467,
    6289358.922247813
   ]
  },
  "min_25m": {
   "gradient_pct": -2.6851108167043094,
   "start_distance_m": 75.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 87.5,
   "start_elevation_m": 261.7514355755002,
   "end_elevation_m": 261.0801578713241,
   "start_xy": [
    1010149.9786529607,
    6289219.393756382
   ],
   "end_xy": [
    1010132.4615929277,
    6289237.1244585
   ]
  },
  "min_50m": {
   "gradient_pct": -1.7532653760609946,
   "start_distance_m": 73.0,
   "end_distance_m": 123.0,
   "midpoint_distance_m": 98.0,
   "start_elevation_m": 261.7538902915542,
   "end_elevation_m": 260.87725760352373,
   "start_xy": [
    1010151.4714794246,
    6289218.0630691545
   ],
   "end_xy": [
    1010121.4843201673,
    6289257.299779753
   ]
  },
  "min_100m": {
   "gradient_pct": 0.43022508234707857,
   "start_distance_m": 56.0,
   "end_distance_m": 156.0,
   "midpoint_distance_m": 106.0,
   "start_elevation_m": 261.1646008038632,
   "end_elevation_m": 261.5948258862103,
   "start_xy": [
    1010163.2209439406,
    6289205.786104019
   ],
   "end_xy": [
    1010112.104754539,
    6289287.672628981
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 41.86971282207708,
   "start_distance_m": 999.0,
   "end_distance_m": 1001.0,
   "midpoint_distance_m": 1000.0,
   "start_elevation_m": 330.06514467057264,
   "end_elevation_m": 330.9025389270142,
   "start_xy": [
    1009535.6252192209,
    6289227.222783855
   ],
   "end_xy": [
    1009533.6721981107,
    6289226.791844714
   ]
  },
  "max_3m": {
   "gradient_pct": 35.588984803390154,
   "start_distance_m": 998.0,
   "end_distance_m": 1001.0,
   "midpoint_distance_m": 999.5,
   "start_elevation_m": 329.8348693829125,
   "end_elevation_m": 330.9025389270142,
   "start_xy": [
    1009536.601729776,
    6289227.438253426
   ],
   "end_xy": [
    1009533.6721981107,
    6289226.791844714
   ]
  }
 },
 "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": 0.011,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.038,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.44,
   "obstruction_max_height_m": 21.89,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    250.0,
    280.0
   ],
   [
    807.0,
    812.0
   ],
   [
    936.0,
    941.0
   ]
  ],
  "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_E1009-N6289_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1010-N6289_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:07:52+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps4",
  "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": [
   "E1009-N6289",
   "E1010-N6289"
  ],
  "elevation_blocks": [
   "22LHD6RQ@2025-03-13"
  ],
  "ign_dalles": [
   "LHD_FXX_1009_6290_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_1010_6290_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD6RQ"
  ],
  "ign_editions": [
   "2025-03-13"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1009_6290_MNT_O_0M50_LAMB93_IGN69": "2025-03-13",
   "LHD_FXX_1010_6290_MNT_O_0M50_LAMB93_IGN69": "2025-03-13"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 51,
   "stations_resolved": 51,
   "width_median_m": 4.75,
   "width_p10_m": 2.0,
   "width_min_m": 1.0,
   "width_max_m": 9.75,
   "bounded_share": 0.471,
   "unbounded_share": 0.529,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.25,
   "window_m": [
    976.0,
    1001.0
   ],
   "width_at_max25_m": 3.5,
   "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": 51,
    "stations_resolved": 51,
    "width_median_m": 2.75,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 8.5,
    "bounded_share": 0.961,
    "unbounded_share": 0.039,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.5,
    "window_m": [
     976.0,
     1001.0
    ],
    "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": "Le Tignet",
  "county": "Alpes-Maritimes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}