{
 "ocl_version": "0.1.0",
 "name": "Taille de Mas de la Chenalette",
 "slug": "taille-de-mas-de-la-chenalette",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.50747627074179,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 234.0,
   "end_distance_m": 236.0,
   "start_elevation_m": 980.457003923201,
   "end_elevation_m": 980.9471534486158,
   "min_gradient_pct": -6.628842220089837
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.51580784848299,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 233.0,
   "end_distance_m": 236.0,
   "start_elevation_m": 980.2116792131613,
   "end_elevation_m": 980.9471534486158,
   "min_gradient_pct": -5.670139136513323
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.14929234348847,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 232.0,
   "end_distance_m": 237.0,
   "start_elevation_m": 979.9755710427046,
   "end_elevation_m": 981.183035659879,
   "min_gradient_pct": -4.449942553321762
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.239918058167177,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 229.0,
   "end_distance_m": 239.0,
   "start_elevation_m": 979.3153317344828,
   "end_elevation_m": 981.6393235402995,
   "min_gradient_pct": -3.221326453681286
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.53364029415991,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 219.0,
   "end_distance_m": 239.0,
   "start_elevation_m": 977.1325954814675,
   "end_elevation_m": 981.6393235402995,
   "min_gradient_pct": -1.811184100673131
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.373279077848565,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 214.0,
   "end_distance_m": 239.0,
   "start_elevation_m": 976.0460037708374,
   "end_elevation_m": 981.6393235402995,
   "min_gradient_pct": -1.425755562604536
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.188436941205282,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 192.0,
   "end_distance_m": 242.0,
   "start_elevation_m": 971.6667631429546,
   "end_elevation_m": 982.2609816135572,
   "min_gradient_pct": -0.8207211048754743
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.024648529733554,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 143.0,
   "end_distance_m": 243.0,
   "start_elevation_m": 965.3774477262207,
   "end_elevation_m": 982.4020962559542,
   "min_gradient_pct": 0.39188465509016623
  }
 ],
 "shape": {
  "ascent_concentration": 0.582,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 93.0,
  "shape_class": "stepped"
 },
 "length_m": 243.36052580776845,
 "start_elevation_m": 962.1762807861334,
 "end_elevation_m": 982.4805107992441,
 "endpoint_gain_m": 20.304230013110782,
 "overall_gradient_pct": 8.34327175523494,
 "accumulated_ascent_m": 21.067481555858308,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.14929234348847,
   "start_distance_m": 232.0,
   "end_distance_m": 237.0,
   "midpoint_distance_m": 234.5,
   "start_elevation_m": 979.9755710427046,
   "end_elevation_m": 981.183035659879,
   "start_xy": [
    984989.1772032263,
    6571594.230132307
   ],
   "end_xy": [
    984985.2353948198,
    6571591.154072085
   ]
  },
  "max_10m": {
   "gradient_pct": 23.239918058167177,
   "start_distance_m": 229.0,
   "end_distance_m": 239.0,
   "midpoint_distance_m": 234.0,
   "start_elevation_m": 979.3153317344828,
   "end_elevation_m": 981.6393235402995,
   "start_xy": [
    984991.5422882702,
    6571596.07576844
   ],
   "end_xy": [
    984983.6586714572,
    6571589.923647997
   ]
  },
  "max_20m": {
   "gradient_pct": 22.53364029415991,
   "start_distance_m": 219.0,
   "end_distance_m": 239.0,
   "midpoint_distance_m": 229.0,
   "start_elevation_m": 977.1325954814675,
   "end_elevation_m": 981.6393235402995,
   "start_xy": [
    984999.445281186,
    6571602.202128202
   ],
   "end_xy": [
    984983.6586714572,
    6571589.923647997
   ]
  },
  "max_25m": {
   "gradient_pct": 22.373279077848565,
   "start_distance_m": 214.0,
   "end_distance_m": 239.0,
   "midpoint_distance_m": 226.5,
   "start_elevation_m": 976.0460037708374,
   "end_elevation_m": 981.6393235402995,
   "start_xy": [
    985003.4939245932,
    6571605.136150451
   ],
   "end_xy": [
    984983.6586714572,
    6571589.923647997
   ]
  },
  "max_50m": {
   "gradient_pct": 21.188436941205282,
   "start_distance_m": 192.0,
   "end_distance_m": 242.0,
   "midpoint_distance_m": 217.0,
   "start_elevation_m": 971.6667631429546,
   "end_elevation_m": 982.2609816135572,
   "start_xy": [
    985021.8061343128,
    6571617.30602035
   ],
   "end_xy": [
    984981.2935864133,
    6571588.078011864
   ]
  },
  "max_100m": {
   "gradient_pct": 17.024648529733554,
   "start_distance_m": 143.0,
   "end_distance_m": 243.0,
   "midpoint_distance_m": 193.0,
   "start_elevation_m": 965.3774477262207,
   "end_elevation_m": 982.4020962559542,
   "start_xy": [
    985059.5970382438,
    6571648.404848147
   ],
   "end_xy": [
    984980.505224732,
    6571587.462799819
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.449942553321762,
   "start_distance_m": 3.0,
   "end_distance_m": 8.0,
   "midpoint_distance_m": 5.5,
   "start_elevation_m": 962.1112220984576,
   "end_elevation_m": 961.8887249707915,
   "start_xy": [
    985165.273757342,
    6571740.223845615
   ],
   "end_xy": [
    985161.4800195786,
    6571736.96692164
   ]
  },
  "min_10m": {
   "gradient_pct": -3.221326453681286,
   "start_distance_m": 2.0,
   "end_distance_m": 12.0,
   "midpoint_distance_m": 7.0,
   "start_elevation_m": 962.1715897486098,
   "end_elevation_m": 961.8494571032417,
   "start_xy": [
    985166.0325048947,
    6571740.87523041
   ],
   "end_xy": [
    985158.4450293679,
    6571734.361382459
   ]
  },
  "min_20m": {
   "gradient_pct": -1.811184100673131,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 962.1762807861334,
   "end_elevation_m": 961.8140439659987,
   "start_xy": [
    985167.55,
    6571742.178
   ],
   "end_xy": [
    985152.3750489465,
    6571729.150304098
   ]
  },
  "min_25m": {
   "gradient_pct": -1.425755562604536,
   "start_distance_m": 1.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 13.5,
   "start_elevation_m": 962.1715540601194,
   "end_elevation_m": 961.8151151694683,
   "start_xy": [
    985166.7912524474,
    6571741.526615205
   ],
   "end_xy": [
    985147.8225636304,
    6571725.241995327
   ]
  },
  "min_50m": {
   "gradient_pct": -0.8207211048754743,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 962.1762807861334,
   "end_elevation_m": 961.7659202336956,
   "start_xy": [
    985167.55,
    6571742.178
   ],
   "end_xy": [
    985129.612622366,
    6571709.608760245
   ]
  },
  "min_100m": {
   "gradient_pct": 0.39188465509016623,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 962.1762807861334,
   "end_elevation_m": 962.5681654412235,
   "start_xy": [
    985167.55,
    6571742.178
   ],
   "end_xy": [
    985091.6766267495,
    6571677.037911326
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.50747627074179,
   "start_distance_m": 234.0,
   "end_distance_m": 236.0,
   "midpoint_distance_m": 235.0,
   "start_elevation_m": 980.457003923201,
   "end_elevation_m": 980.9471534486158,
   "start_xy": [
    984987.6004798637,
    6571592.9997082185
   ],
   "end_xy": [
    984986.0237565011,
    6571591.76928413
   ]
  },
  "max_3m": {
   "gradient_pct": 24.51580784848299,
   "start_distance_m": 233.0,
   "end_distance_m": 236.0,
   "midpoint_distance_m": 234.5,
   "start_elevation_m": 980.2116792131613,
   "end_elevation_m": 980.9471534486158,
   "start_xy": [
    984988.388841545,
    6571593.614920262
   ],
   "end_xy": [
    984986.0237565011,
    6571591.76928413
   ]
  }
 },
 "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": 0.0,
   "obstruction_max_height_m": 0.0,
   "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_E984-N6571_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E985-N6571_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:03:01+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": [
   "E984-N6571",
   "E985-N6571"
  ],
  "elevation_blocks": [
   "21LHD5QK2@2025-06-13"
  ],
  "ign_dalles": [
   "LHD_FXX_0984_6572_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0985_6572_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD5QK2"
  ],
  "ign_editions": [
   "2025-06-13"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0984_6572_MNT_O_0M50_LAMB93_IGN69": "2025-06-13",
   "LHD_FXX_0985_6572_MNT_O_0M50_LAMB93_IGN69": "2025-06-13"
  },
  "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": 7.62,
   "width_p10_m": 4.88,
   "width_min_m": 4.0,
   "width_max_m": 12.0,
   "bounded_share": 0.0,
   "unbounded_share": 1.0,
   "confidence_median": 0.0,
   "window_m": [
    214.0,
    239.0
   ],
   "width_at_max25_m": 7.5,
   "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": 6.62,
    "width_min_m": 4.75,
    "width_max_m": 12.0,
    "bounded_share": 0.25,
    "unbounded_share": 0.75,
    "confidence_median": 0.0,
    "width_median_bounded_m": 6.62,
    "window_m": [
     214.0,
     239.0
    ],
    "width_at_max25_m": 7.25,
    "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": "Morzine",
  "county": "Haute-Savoie",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}