{
 "ocl_version": "0.1.0",
 "name": "Chemin des Pins",
 "slug": "chemin-des-pins-3",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 26.409551889153704,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 184.0,
   "end_distance_m": 186.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 148.54057473644852,
   "min_gradient_pct": -2.626427753847338
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.70109266736722,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 184.0,
   "end_distance_m": 187.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 148.78341647868646,
   "min_gradient_pct": -1.8848089917933446
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.196507677786713,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 184.0,
   "end_distance_m": 189.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 149.27220908255478,
   "min_gradient_pct": 0.40828637632785103
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.64298351519409,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 184.0,
   "end_distance_m": 194.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 150.37668205018485,
   "min_gradient_pct": 2.8500373843976945
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.199363236433186,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 184.0,
   "end_distance_m": 204.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 152.65225634595208,
   "min_gradient_pct": 3.4861817654685012
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.803584356648912,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 184.0,
   "end_distance_m": 209.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 153.71327978782767,
   "min_gradient_pct": 3.748150372213445
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.54168122210371,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 184.0,
   "end_distance_m": 234.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 158.7832243097173,
   "min_gradient_pct": 5.7236078274378315
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.292151795640905,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 140.0,
   "end_distance_m": 240.0,
   "start_elevation_m": 141.72306970454133,
   "end_elevation_m": 160.01522150018224,
   "min_gradient_pct": 6.718085186430557
  }
 ],
 "shape": {
  "ascent_concentration": 0.419,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 163.0,
  "shape_class": "sustained"
 },
 "length_m": 247.20000000026457,
 "start_elevation_m": 129.84401906492607,
 "end_elevation_m": 160.9256800025154,
 "endpoint_gain_m": 31.081660937589334,
 "overall_gradient_pct": 12.573487434286434,
 "accumulated_ascent_m": 31.138205207343134,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.196507677786713,
   "start_distance_m": 184.0,
   "end_distance_m": 189.0,
   "midpoint_distance_m": 186.5,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 149.27220908255478,
   "start_xy": [
    845699.4045926784,
    6431769.710351053
   ],
   "end_xy": [
    845701.2602480543,
    6431774.353253499
   ]
  },
  "max_10m": {
   "gradient_pct": 23.64298351519409,
   "start_distance_m": 184.0,
   "end_distance_m": 194.0,
   "midpoint_distance_m": 189.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 150.37668205018485,
   "start_xy": [
    845699.4045926784,
    6431769.710351053
   ],
   "end_xy": [
    845702.7133639636,
    6431779.126759513
   ]
  },
  "max_20m": {
   "gradient_pct": 23.199363236433186,
   "start_distance_m": 184.0,
   "end_distance_m": 204.0,
   "midpoint_distance_m": 194.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 152.65225634595208,
   "start_xy": [
    845699.4045926784,
    6431769.710351053
   ],
   "end_xy": [
    845705.1606551583,
    6431788.822674417
   ]
  },
  "max_25m": {
   "gradient_pct": 22.803584356648912,
   "start_distance_m": 184.0,
   "end_distance_m": 209.0,
   "midpoint_distance_m": 196.5,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 153.71327978782767,
   "start_xy": [
    845699.4045926784,
    6431769.710351053
   ],
   "end_xy": [
    845705.3122459473,
    6431793.779704771
   ]
  },
  "max_50m": {
   "gradient_pct": 21.54168122210371,
   "start_distance_m": 184.0,
   "end_distance_m": 234.0,
   "midpoint_distance_m": 209.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 158.7832243097173,
   "start_xy": [
    845699.4045926784,
    6431769.710351053
   ],
   "end_xy": [
    845706.2242316549,
    6431818.659859895
   ]
  },
  "max_100m": {
   "gradient_pct": 18.292151795640905,
   "start_distance_m": 140.0,
   "end_distance_m": 240.0,
   "midpoint_distance_m": 190.0,
   "start_elevation_m": 141.72306970454133,
   "end_elevation_m": 160.01522150018224,
   "start_xy": [
    845730.5880517429,
    6431739.863684463
   ],
   "end_xy": [
    845707.7133225743,
    6431824.254040889
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.40828637632785103,
   "start_distance_m": 81.0,
   "end_distance_m": 86.0,
   "midpoint_distance_m": 83.5,
   "start_elevation_m": 134.73034264901096,
   "end_elevation_m": 134.75075696782736,
   "start_xy": [
    845763.2268654911,
    6431692.547378444
   ],
   "end_xy": [
    845759.269401269,
    6431694.11021258
   ]
  },
  "min_10m": {
   "gradient_pct": 2.8500373843976945,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 129.84401906492607,
   "end_elevation_m": 130.12902280336584,
   "start_xy": [
    845843.814,
    6431699.44
   ],
   "end_xy": [
    845833.8401213367,
    6431699.947921194
   ]
  },
  "min_20m": {
   "gradient_pct": 3.4861817654685012,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 129.84401906492607,
   "end_elevation_m": 130.54125541801977,
   "start_xy": [
    845843.814,
    6431699.44
   ],
   "end_xy": [
    845823.8944455121,
    6431698.906992574
   ]
  },
  "min_25m": {
   "gradient_pct": 3.748150372213445,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 129.84401906492607,
   "end_elevation_m": 130.78105665797943,
   "start_xy": [
    845843.814,
    6431699.44
   ],
   "end_xy": [
    845818.9216075998,
    6431698.386528264
   ]
  },
  "min_50m": {
   "gradient_pct": 5.7236078274378315,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 129.84401906492607,
   "end_elevation_m": 132.705822978645,
   "start_xy": [
    845843.814,
    6431699.44
   ],
   "end_xy": [
    845794.0577179762,
    6431695.781343255
   ]
  },
  "min_100m": {
   "gradient_pct": 6.718085186430557,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 129.84401906492607,
   "end_elevation_m": 136.56210425135663,
   "start_xy": [
    845843.814,
    6431699.44
   ],
   "end_xy": [
    845751.8334958364,
    6431705.972223809
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 26.409551889153704,
   "start_distance_m": 184.0,
   "end_distance_m": 186.0,
   "midpoint_distance_m": 185.0,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 148.54057473644852,
   "start_xy": [
    845699.4045926784,
    6431769.710351053
   ],
   "end_xy": [
    845700.1468548288,
    6431771.567512031
   ]
  },
  "max_3m": {
   "gradient_pct": 25.70109266736722,
   "start_distance_m": 184.0,
   "end_distance_m": 187.0,
   "midpoint_distance_m": 185.5,
   "start_elevation_m": 148.01238369866545,
   "end_elevation_m": 148.78341647868646,
   "start_xy": [
    845699.4045926784,
    6431769.710351053
   ],
   "end_xy": [
    845700.517985904,
    6431772.496092521
   ]
  }
 },
 "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": 0.1,
   "obstruction_max_height_m": 11.66,
   "flagged_windows_m": [
    50,
    100
   ]
  },
  "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_E845-N6431_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:55:17+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps1",
  "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": [
   "E845-N6431"
  ],
  "elevation_blocks": [
   "22LHD5ON@2025-08-13"
  ],
  "ign_dalles": [
   "LHD_FXX_0845_6432_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD5ON"
  ],
  "ign_editions": [
   "2025-08-13"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0845_6432_MNT_O_0M50_LAMB93_IGN69": "2025-08-13"
  },
  "route_cut_m": 247.2,
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 16,
   "stations_resolved": 16,
   "width_median_m": 4.88,
   "width_p10_m": 2.62,
   "width_min_m": 1.25,
   "width_max_m": 12.0,
   "bounded_share": 0.25,
   "unbounded_share": 0.75,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.0,
   "window_m": [
    184.0,
    209.0
   ],
   "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": 16,
    "stations_resolved": 16,
    "width_median_m": 4.25,
    "width_p10_m": 1.62,
    "width_min_m": 1.5,
    "width_max_m": 10.5,
    "bounded_share": 0.75,
    "unbounded_share": 0.25,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.5,
    "window_m": [
     184.0,
     209.0
    ],
    "width_at_max25_m": 2.25,
    "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": "Cornas",
  "county": "Ard\u00e8che",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}