{
 "ocl_version": "0.1.0",
 "name": "Chemin de la Tsantsine",
 "slug": "chemin-de-la-tsantsine",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.069897878973734,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 211.0,
   "end_distance_m": 213.0,
   "start_elevation_m": 1198.9532151902135,
   "end_elevation_m": 1199.434613147793,
   "min_gradient_pct": 4.424632514792393
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.208270738647723,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 215.0,
   "end_distance_m": 218.0,
   "start_elevation_m": 1199.8480547410554,
   "end_elevation_m": 1200.5443028632149,
   "min_gradient_pct": 4.679243556824986
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.719533731033152,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 212.0,
   "end_distance_m": 217.0,
   "start_elevation_m": 1199.1554842759078,
   "end_elevation_m": 1200.2914609624595,
   "min_gradient_pct": 4.970574465041864
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.494714191200273,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 212.0,
   "end_distance_m": 222.0,
   "start_elevation_m": 1199.1554842759078,
   "end_elevation_m": 1201.4049556950279,
   "min_gradient_pct": 5.821388082765679
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.947616788980667,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 202.0,
   "end_distance_m": 222.0,
   "start_elevation_m": 1197.2154323372317,
   "end_elevation_m": 1201.4049556950279,
   "min_gradient_pct": 7.013881836746805
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.1859407928132,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 199.0,
   "end_distance_m": 224.0,
   "start_elevation_m": 1196.693226631755,
   "end_elevation_m": 1201.7397118299582,
   "min_gradient_pct": 7.563974689751376
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.800507829786056,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 176.0,
   "end_distance_m": 226.0,
   "start_elevation_m": 1193.1363252474555,
   "end_elevation_m": 1202.0365791623485,
   "min_gradient_pct": 9.058400023138802
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.07125478601688,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 122.0,
   "end_distance_m": 222.0,
   "start_elevation_m": 1185.333700909011,
   "end_elevation_m": 1201.4049556950279,
   "min_gradient_pct": 9.752158638294759
  }
 ],
 "shape": {
  "ascent_concentration": 0.328,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 157.0,
  "shape_class": "sustained"
 },
 "length_m": 227.3780321205511,
 "start_elevation_m": 1172.6017233764528,
 "end_elevation_m": 1202.1379785498011,
 "endpoint_gain_m": 29.53625517334831,
 "overall_gradient_pct": 12.989933503201753,
 "accumulated_ascent_m": 29.53625517334831,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.719533731033152,
   "start_distance_m": 212.0,
   "end_distance_m": 217.0,
   "midpoint_distance_m": 214.5,
   "start_elevation_m": 1199.1554842759078,
   "end_elevation_m": 1200.2914609624595,
   "start_xy": [
    989587.6969872575,
    6530600.118306932
   ],
   "end_xy": [
    989591.8288594772,
    6530602.933912011
   ]
  },
  "max_10m": {
   "gradient_pct": 22.494714191200273,
   "start_distance_m": 212.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 217.0,
   "start_elevation_m": 1199.1554842759078,
   "end_elevation_m": 1201.4049556950279,
   "start_xy": [
    989587.6969872575,
    6530600.118306932
   ],
   "end_xy": [
    989595.9607316969,
    6530605.74951709
   ]
  },
  "max_20m": {
   "gradient_pct": 20.947616788980667,
   "start_distance_m": 202.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 212.0,
   "start_elevation_m": 1197.2154323372317,
   "end_elevation_m": 1201.4049556950279,
   "start_xy": [
    989581.3651608442,
    6530592.464207001
   ],
   "end_xy": [
    989595.9607316969,
    6530605.74951709
   ]
  },
  "max_25m": {
   "gradient_pct": 20.1859407928132,
   "start_distance_m": 199.0,
   "end_distance_m": 224.0,
   "midpoint_distance_m": 211.5,
   "start_elevation_m": 1196.693226631755,
   "end_elevation_m": 1201.7397118299582,
   "start_xy": [
    989579.5635912789,
    6530590.065384977
   ],
   "end_xy": [
    989597.6134805848,
    6530606.875759121
   ]
  },
  "max_50m": {
   "gradient_pct": 17.800507829786056,
   "start_distance_m": 176.0,
   "end_distance_m": 226.0,
   "midpoint_distance_m": 201.0,
   "start_elevation_m": 1193.1363252474555,
   "end_elevation_m": 1202.0365791623485,
   "start_xy": [
    989563.357577431,
    6530574.116665363
   ],
   "end_xy": [
    989599.2662294727,
    6530608.002001152
   ]
  },
  "max_100m": {
   "gradient_pct": 16.07125478601688,
   "start_distance_m": 122.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 172.0,
   "start_elevation_m": 1185.333700909011,
   "end_elevation_m": 1201.4049556950279,
   "start_xy": [
    989519.9809029773,
    6530544.263534014
   ],
   "end_xy": [
    989595.9607316969,
    6530605.74951709
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 4.970574465041864,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 1172.6017233764528,
   "end_elevation_m": 1172.850252099705,
   "start_xy": [
    989403.465,
    6530536.155
   ],
   "end_xy": [
    989407.6859278651,
    6530533.474744797
   ]
  },
  "min_10m": {
   "gradient_pct": 5.821388082765679,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 1172.6017233764528,
   "end_elevation_m": 1173.1838621847294,
   "start_xy": [
    989403.465,
    6530536.155
   ],
   "end_xy": [
    989411.9068557302,
    6530530.794489592
   ]
  },
  "min_20m": {
   "gradient_pct": 7.013881836746805,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 1172.6017233764528,
   "end_elevation_m": 1174.0044997438022,
   "start_xy": [
    989403.465,
    6530536.155
   ],
   "end_xy": [
    989421.0143287324,
    6530526.870015022
   ]
  },
  "min_25m": {
   "gradient_pct": 7.563974689751376,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 1172.6017233764528,
   "end_elevation_m": 1174.4927170488907,
   "start_xy": [
    989403.465,
    6530536.155
   ],
   "end_xy": [
    989425.7875824984,
    6530525.381375212
   ]
  },
  "min_50m": {
   "gradient_pct": 9.058400023138802,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 1172.6017233764528,
   "end_elevation_m": 1177.1309233880222,
   "start_xy": [
    989403.465,
    6530536.155
   ],
   "end_xy": [
    989450.5814079623,
    6530525.659903052
   ]
  },
  "min_100m": {
   "gradient_pct": 9.752158638294759,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 1172.6017233764528,
   "end_elevation_m": 1182.3538820147476,
   "start_xy": [
    989403.465,
    6530536.155
   ],
   "end_xy": [
    989499.1240902647,
    6530537.474565614
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.069897878973734,
   "start_distance_m": 211.0,
   "end_distance_m": 213.0,
   "midpoint_distance_m": 212.0,
   "start_elevation_m": 1198.9532151902135,
   "end_elevation_m": 1199.434613147793,
   "start_xy": [
    989586.8706128135,
    6530599.555185916
   ],
   "end_xy": [
    989588.5233617014,
    6530600.681427947
   ]
  },
  "max_3m": {
   "gradient_pct": 23.208270738647723,
   "start_distance_m": 215.0,
   "end_distance_m": 218.0,
   "midpoint_distance_m": 216.5,
   "start_elevation_m": 1199.8480547410554,
   "end_elevation_m": 1200.5443028632149,
   "start_xy": [
    989590.1761105893,
    6530601.807669979
   ],
   "end_xy": [
    989592.6552339211,
    6530603.497033026
   ]
  }
 },
 "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": 0.079,
   "obstruction_max_height_m": 9.71,
   "flagged_windows_m": [
    2,
    20,
    25,
    50
   ]
  },
  "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_E989-N6530_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:25:47+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": [
   "E989-N6530"
  ],
  "elevation_blocks": [
   "21LHD5RL@2025-06-04"
  ],
  "ign_dalles": [
   "LHD_FXX_0989_6531_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD5RL"
  ],
  "ign_editions": [
   "2025-06-04"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0989_6531_MNT_O_0M50_LAMB93_IGN69": "2025-06-04"
  },
  "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": 5.75,
   "width_p10_m": 3.38,
   "width_min_m": 3.0,
   "width_max_m": 12.0,
   "bounded_share": 0.125,
   "unbounded_share": 0.875,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.12,
   "window_m": [
    199.0,
    224.0
   ],
   "width_at_max25_m": 4.5,
   "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": 8.62,
    "width_p10_m": 1.62,
    "width_min_m": 1.25,
    "width_max_m": 12.0,
    "bounded_share": 0.5,
    "unbounded_share": 0.5,
    "confidence_median": 0.5,
    "width_median_bounded_m": 3.5,
    "window_m": [
     199.0,
     224.0
    ],
    "width_at_max25_m": 8.75,
    "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": "Les Contamines-Montjoie",
  "county": "Haute-Savoie",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}