{
 "ocl_version": "0.1.0",
 "name": "Chemin de Barlet",
 "slug": "chemin-de-barlet",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.59498921825036,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 154.0,
   "end_distance_m": 156.0,
   "start_elevation_m": 490.8714610372521,
   "end_elevation_m": 491.3433608216171,
   "min_gradient_pct": -1.1236478389832882
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.307976130086143,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 153.0,
   "end_distance_m": 156.0,
   "start_elevation_m": 490.67412153771454,
   "end_elevation_m": 491.3433608216171,
   "min_gradient_pct": 0.5293792931032234
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.607386720166915,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 136.0,
   "end_distance_m": 141.0,
   "start_elevation_m": 487.18396401347496,
   "end_elevation_m": 488.2643333494833,
   "min_gradient_pct": 1.9213807348410228
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.01225730345334,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 136.0,
   "end_distance_m": 146.0,
   "start_elevation_m": 487.18396401347496,
   "end_elevation_m": 489.2851897438203,
   "min_gradient_pct": 2.685946860091235
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.79698404071081,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 136.0,
   "end_distance_m": 156.0,
   "start_elevation_m": 487.18396401347496,
   "end_elevation_m": 491.3433608216171,
   "min_gradient_pct": 4.632588977505634
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.513936305301286,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 132.0,
   "end_distance_m": 157.0,
   "start_elevation_m": 486.39864452894915,
   "end_elevation_m": 491.52712860527447,
   "min_gradient_pct": 5.78545920811689
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.55108967846934,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 117.0,
   "end_distance_m": 167.0,
   "start_elevation_m": 483.7145369928953,
   "end_elevation_m": 493.49008183213,
   "min_gradient_pct": 8.134036627456567
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.16048612066703,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 67.0,
   "end_distance_m": 167.0,
   "start_elevation_m": 474.32959571146296,
   "end_elevation_m": 493.49008183213,
   "min_gradient_pct": 10.39974955876096
  }
 ],
 "shape": {
  "ascent_concentration": 0.344,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 203.0,
  "shape_class": "sustained"
 },
 "length_m": 316.89999999984445,
 "start_elevation_m": 466.0558694305421,
 "end_elevation_m": 510.40824948875905,
 "endpoint_gain_m": 44.352380058216966,
 "overall_gradient_pct": 13.995702132609258,
 "accumulated_ascent_m": 44.40301315246893,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.607386720166915,
   "start_distance_m": 136.0,
   "end_distance_m": 141.0,
   "midpoint_distance_m": 138.5,
   "start_elevation_m": 487.18396401347496,
   "end_elevation_m": 488.2643333494833,
   "start_xy": [
    942373.1172438858,
    6336492.767056926
   ],
   "end_xy": [
    942378.0622230715,
    6336492.113818366
   ]
  },
  "max_10m": {
   "gradient_pct": 21.01225730345334,
   "start_distance_m": 136.0,
   "end_distance_m": 146.0,
   "midpoint_distance_m": 141.0,
   "start_elevation_m": 487.18396401347496,
   "end_elevation_m": 489.2851897438203,
   "start_xy": [
    942373.1172438858,
    6336492.767056926
   ],
   "end_xy": [
    942383.0309157772,
    6336492.433852017
   ]
  },
  "max_20m": {
   "gradient_pct": 20.79698404071081,
   "start_distance_m": 136.0,
   "end_distance_m": 156.0,
   "midpoint_distance_m": 146.0,
   "start_elevation_m": 487.18396401347496,
   "end_elevation_m": 491.3433608216171,
   "start_xy": [
    942373.1172438858,
    6336492.767056926
   ],
   "end_xy": [
    942392.1559989523,
    6336496.497134109
   ]
  },
  "max_25m": {
   "gradient_pct": 20.513936305301286,
   "start_distance_m": 132.0,
   "end_distance_m": 157.0,
   "midpoint_distance_m": 144.5,
   "start_elevation_m": 486.39864452894915,
   "end_elevation_m": 491.52712860527447,
   "start_xy": [
    942369.1853182039,
    6336493.501876926
   ],
   "end_xy": [
    942393.0611964209,
    6336496.922125337
   ]
  },
  "max_50m": {
   "gradient_pct": 19.55108967846934,
   "start_distance_m": 117.0,
   "end_distance_m": 167.0,
   "midpoint_distance_m": 142.0,
   "start_elevation_m": 483.7145369928953,
   "end_elevation_m": 493.49008183213,
   "start_xy": [
    942354.5470621292,
    6336496.757634394
   ],
   "end_xy": [
    942401.8055321709,
    6336494.5671266
   ]
  },
  "max_100m": {
   "gradient_pct": 19.16048612066703,
   "start_distance_m": 67.0,
   "end_distance_m": 167.0,
   "midpoint_distance_m": 117.0,
   "start_elevation_m": 474.32959571146296,
   "end_elevation_m": 493.49008183213,
   "start_xy": [
    942306.4619252812,
    6336508.676235349
   ],
   "end_xy": [
    942401.8055321709,
    6336494.5671266
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.9213807348410228,
   "start_distance_m": 283.0,
   "end_distance_m": 288.0,
   "midpoint_distance_m": 285.5,
   "start_elevation_m": 508.3549077535795,
   "end_elevation_m": 508.45097679032153,
   "start_xy": [
    942482.9672812842,
    6336413.293489644
   ],
   "end_xy": [
    942487.4477281616,
    6336414.889095798
   ]
  },
  "min_10m": {
   "gradient_pct": 2.685946860091235,
   "start_distance_m": 285.0,
   "end_distance_m": 295.0,
   "midpoint_distance_m": 290.0,
   "start_elevation_m": 508.4296654673906,
   "end_elevation_m": 508.6982601533997,
   "start_xy": [
    942484.9626885278,
    6336413.428951567
   ],
   "end_xy": [
    942486.6999651524,
    6336421.603687281
   ]
  },
  "min_20m": {
   "gradient_pct": 4.632588977505634,
   "start_distance_m": 278.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 288.0,
   "start_elevation_m": 507.9839422260224,
   "end_elevation_m": 508.91046002152353,
   "start_xy": [
    942478.2909307032,
    6336414.851565235
   ],
   "end_xy": [
    942485.7020157828,
    6336424.432838577
   ]
  },
  "min_25m": {
   "gradient_pct": 5.78545920811689,
   "start_distance_m": 278.0,
   "end_distance_m": 303.0,
   "midpoint_distance_m": 290.5,
   "start_elevation_m": 507.9839422260224,
   "end_elevation_m": 509.43030702805163,
   "start_xy": [
    942478.2909307032,
    6336414.851565235
   ],
   "end_xy": [
    942484.0387668336,
    6336429.148090737
   ]
  },
  "min_50m": {
   "gradient_pct": 8.134036627456567,
   "start_distance_m": 266.0,
   "end_distance_m": 316.0,
   "midpoint_distance_m": 291.0,
   "start_elevation_m": 506.2738734074429,
   "end_elevation_m": 510.3408917211712,
   "start_xy": [
    942468.796641689,
    6336422.160910965
   ],
   "end_xy": [
    942483.7849145648,
    6336441.274253752
   ]
  },
  "min_100m": {
   "gradient_pct": 10.39974955876096,
   "start_distance_m": 215.0,
   "end_distance_m": 315.0,
   "midpoint_distance_m": 265.0,
   "start_elevation_m": 499.8694456600422,
   "end_elevation_m": 510.26919521880313,
   "start_xy": [
    942431.7056847677,
    6336457.140361441
   ],
   "end_xy": [
    942483.1250683784,
    6336440.528641003
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.59498921825036,
   "start_distance_m": 154.0,
   "end_distance_m": 156.0,
   "midpoint_distance_m": 155.0,
   "start_elevation_m": 490.8714610372521,
   "end_elevation_m": 491.3433608216171,
   "start_xy": [
    942390.3456040152,
    6336495.6471516555
   ],
   "end_xy": [
    942392.1559989523,
    6336496.497134109
   ]
  },
  "max_3m": {
   "gradient_pct": 22.307976130086143,
   "start_distance_m": 153.0,
   "end_distance_m": 156.0,
   "midpoint_distance_m": 154.5,
   "start_elevation_m": 490.67412153771454,
   "end_elevation_m": 491.3433608216171,
   "start_xy": [
    942389.4404065467,
    6336495.222160429
   ],
   "end_xy": [
    942392.1559989523,
    6336496.497134109
   ]
  }
 },
 "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": 0.097,
   "obstruction_max_height_m": 11.58,
   "flagged_windows_m": [
    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_E942-N6336_0m5.tif"
  ],
  "calculated_at": "2026-09-17T05:37:41+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": [
   "E942-N6336"
  ],
  "elevation_blocks": [
   "21LHD8QO@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_0942_6337_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8QO"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0942_6337_MNT_O_0M50_LAMB93_IGN69": "2025-04-02"
  },
  "route_cut_m": 316.9,
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 19,
   "stations_resolved": 19,
   "width_median_m": 4.25,
   "width_p10_m": 3.4,
   "width_min_m": 3.0,
   "width_max_m": 11.75,
   "bounded_share": 0.526,
   "unbounded_share": 0.474,
   "confidence_median": 0.501,
   "width_median_bounded_m": 4.12,
   "window_m": [
    132.0,
    157.0
   ],
   "width_at_max25_m": 4.75,
   "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": 19,
    "stations_resolved": 19,
    "width_median_m": 4.25,
    "width_p10_m": 0.95,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.789,
    "unbounded_share": 0.211,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.5,
    "window_m": [
     132.0,
     157.0
    ],
    "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": "L'Escale",
  "county": "Alpes-de-Haute-Provence",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}