{
 "ocl_version": "0.1.0",
 "name": "Chemin L\u00e9andre M\u00e9gy",
 "slug": "chemin-leandre-megy",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.383855316131076,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 693.0,
   "end_distance_m": 695.0,
   "start_elevation_m": 557.7940462572731,
   "end_elevation_m": 558.2817233635957,
   "min_gradient_pct": -2.0294309893529316
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.341153509703872,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 693.0,
   "end_distance_m": 696.0,
   "start_elevation_m": 557.7940462572731,
   "end_elevation_m": 558.5242808625642,
   "min_gradient_pct": -1.1468304221201227
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.96877508977468,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 692.0,
   "end_distance_m": 697.0,
   "start_elevation_m": 557.5664623627771,
   "end_elevation_m": 558.7649011172658,
   "min_gradient_pct": -0.9817552730351053
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.808237739302513,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 691.0,
   "end_distance_m": 701.0,
   "start_elevation_m": 557.3424257680974,
   "end_elevation_m": 559.6232495420277,
   "min_gradient_pct": 0.02909596773861267
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.095310097946367,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 684.0,
   "end_distance_m": 704.0,
   "start_elevation_m": 556.0018846985454,
   "end_elevation_m": 560.2209467181347,
   "min_gradient_pct": 0.9048190861363992
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.382091476532423,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 680.0,
   "end_distance_m": 705.0,
   "start_elevation_m": 555.2999601599563,
   "end_elevation_m": 560.3954830290894,
   "min_gradient_pct": 1.1498948045932593
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.065340211720923,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 655.0,
   "end_distance_m": 705.0,
   "start_elevation_m": 550.862812923229,
   "end_elevation_m": 560.3954830290894,
   "min_gradient_pct": 2.528590172619488
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.716842858746077,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 605.0,
   "end_distance_m": 705.0,
   "start_elevation_m": 543.6786401703433,
   "end_elevation_m": 560.3954830290894,
   "min_gradient_pct": 2.6699703289134504
  }
 ],
 "shape": {
  "ascent_concentration": 0.426,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 128.0,
  "shape_class": "sustained"
 },
 "length_m": 726.0886486677749,
 "start_elevation_m": 502.7812772416972,
 "end_elevation_m": 562.3169945334398,
 "endpoint_gain_m": 59.53571729174263,
 "overall_gradient_pct": 8.199510817443375,
 "accumulated_ascent_m": 59.7032612683667,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.96877508977468,
   "start_distance_m": 692.0,
   "end_distance_m": 697.0,
   "midpoint_distance_m": 694.5,
   "start_elevation_m": 557.5664623627771,
   "end_elevation_m": 558.7649011172658,
   "start_xy": [
    918264.3191202191,
    6316034.410872415
   ],
   "end_xy": [
    918259.4249981703,
    6316033.38736405
   ]
  },
  "max_10m": {
   "gradient_pct": 22.808237739302513,
   "start_distance_m": 691.0,
   "end_distance_m": 701.0,
   "midpoint_distance_m": 696.0,
   "start_elevation_m": 557.3424257680974,
   "end_elevation_m": 559.6232495420277,
   "start_xy": [
    918265.2979446287,
    6316034.615574088
   ],
   "end_xy": [
    918255.5097005315,
    6316032.568557358
   ]
  },
  "max_20m": {
   "gradient_pct": 21.095310097946367,
   "start_distance_m": 684.0,
   "end_distance_m": 704.0,
   "midpoint_distance_m": 694.0,
   "start_elevation_m": 556.0018846985454,
   "end_elevation_m": 560.2209467181347,
   "start_xy": [
    918272.1631422795,
    6316035.971702412
   ],
   "end_xy": [
    918252.5732936178,
    6316031.954135324
   ]
  },
  "max_25m": {
   "gradient_pct": 20.382091476532423,
   "start_distance_m": 680.0,
   "end_distance_m": 705.0,
   "midpoint_distance_m": 692.5,
   "start_elevation_m": 555.2999601599563,
   "end_elevation_m": 560.3954830290894,
   "start_xy": [
    918276.1239661544,
    6316036.530159421
   ],
   "end_xy": [
    918251.5944916628,
    6316031.749326309
   ]
  },
  "max_50m": {
   "gradient_pct": 19.065340211720923,
   "start_distance_m": 655.0,
   "end_distance_m": 705.0,
   "midpoint_distance_m": 680.0,
   "start_elevation_m": 550.862812923229,
   "end_elevation_m": 560.3954830290894,
   "start_xy": [
    918300.5726223822,
    6316034.095924354
   ],
   "end_xy": [
    918251.5944916628,
    6316031.749326309
   ]
  },
  "max_100m": {
   "gradient_pct": 16.716842858746077,
   "start_distance_m": 605.0,
   "end_distance_m": 705.0,
   "midpoint_distance_m": 655.0,
   "start_elevation_m": 543.6786401703433,
   "end_elevation_m": 560.3954830290894,
   "start_xy": [
    918349.2257316048,
    6316029.158593497
   ],
   "end_xy": [
    918251.5944916628,
    6316031.749326309
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.9817552730351053,
   "start_distance_m": 408.0,
   "end_distance_m": 413.0,
   "midpoint_distance_m": 410.5,
   "start_elevation_m": 531.8532087696105,
   "end_elevation_m": 531.8041210059588,
   "start_xy": [
    918527.958297861,
    6316031.232441508
   ],
   "end_xy": [
    918525.1806305582,
    6316028.562400158
   ]
  },
  "min_10m": {
   "gradient_pct": 0.02909596773861267,
   "start_distance_m": 407.0,
   "end_distance_m": 417.0,
   "midpoint_distance_m": 412.0,
   "start_elevation_m": 531.837274720106,
   "end_elevation_m": 531.8401843168799,
   "start_xy": [
    918528.0121935759,
    6316032.230988078
   ],
   "end_xy": [
    918521.214736809,
    6316028.041164346
   ]
  },
  "min_20m": {
   "gradient_pct": 0.9048190861363992,
   "start_distance_m": 467.0,
   "end_distance_m": 487.0,
   "midpoint_distance_m": 477.0,
   "start_elevation_m": 533.611335294865,
   "end_elevation_m": 533.7922991120922,
   "start_xy": [
    918477.3899513216,
    6316013.700809697
   ],
   "end_xy": [
    918462.0000475632,
    6316026.190560922
   ]
  },
  "min_25m": {
   "gradient_pct": 1.1498948045932593,
   "start_distance_m": 466.0,
   "end_distance_m": 491.0,
   "midpoint_distance_m": 478.5,
   "start_elevation_m": 533.5884850361094,
   "end_elevation_m": 533.8759587372577,
   "start_xy": [
    918478.0743779144,
    6316012.971727918
   ],
   "end_xy": [
    918458.2959751579,
    6316027.700477349
   ]
  },
  "min_50m": {
   "gradient_pct": 2.528590172619488,
   "start_distance_m": 454.0,
   "end_distance_m": 504.0,
   "midpoint_distance_m": 479.0,
   "start_elevation_m": 533.0684978055979,
   "end_elevation_m": 534.3327928919076,
   "start_xy": [
    918486.8115881585,
    6316016.085819899
   ],
   "end_xy": [
    918445.695141934,
    6316030.753650961
   ]
  },
  "min_100m": {
   "gradient_pct": 2.6699703289134504,
   "start_distance_m": 407.0,
   "end_distance_m": 507.0,
   "midpoint_distance_m": 457.0,
   "start_elevation_m": 531.837274720106,
   "end_elevation_m": 534.5072450490195,
   "start_xy": [
    918528.0121935759,
    6316032.230988078
   ],
   "end_xy": [
    918442.7562307252,
    6316031.3559805285
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.383855316131076,
   "start_distance_m": 693.0,
   "end_distance_m": 695.0,
   "midpoint_distance_m": 694.0,
   "start_elevation_m": 557.7940462572731,
   "end_elevation_m": 558.2817233635957,
   "start_xy": [
    918263.3402958093,
    6316034.2061707415
   ],
   "end_xy": [
    918261.3826469899,
    6316033.796767396
   ]
  },
  "max_3m": {
   "gradient_pct": 24.341153509703872,
   "start_distance_m": 693.0,
   "end_distance_m": 696.0,
   "midpoint_distance_m": 694.5,
   "start_elevation_m": 557.7940462572731,
   "end_elevation_m": 558.5242808625642,
   "start_xy": [
    918263.3402958093,
    6316034.2061707415
   ],
   "end_xy": [
    918260.4038225801,
    6316033.592065723
   ]
  }
 },
 "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": 0.022,
   "obstruction_max_height_m": 10.64,
   "flagged_windows_m": []
  },
  "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_E918-N6315_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E918-N6316_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:46:03+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": [
   "E918-N6315",
   "E918-N6316"
  ],
  "elevation_blocks": [
   "21LHD7PP@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_0918_6316_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0918_6317_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD7PP"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0918_6316_MNT_O_0M50_LAMB93_IGN69": "2025-04-02",
   "LHD_FXX_0918_6317_MNT_O_0M50_LAMB93_IGN69": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 35,
   "stations_resolved": 35,
   "width_median_m": 4.25,
   "width_p10_m": 2.7,
   "width_min_m": 1.5,
   "width_max_m": 9.75,
   "bounded_share": 0.4,
   "unbounded_share": 0.6,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.0,
   "window_m": [
    680.0,
    705.0
   ],
   "width_at_max25_m": 6.75,
   "window_stations": 6,
   "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": 35,
    "stations_resolved": 35,
    "width_median_m": 6.75,
    "width_p10_m": 3.35,
    "width_min_m": 1.5,
    "width_max_m": 12.0,
    "bounded_share": 0.629,
    "unbounded_share": 0.371,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.62,
    "window_m": [
     680.0,
     705.0
    ],
    "width_at_max25_m": 7.62,
    "window_stations": 6,
    "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-Michel-l'Observatoire",
  "county": "Alpes-de-Haute-Provence",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}