{
 "ocl_version": "0.1.0",
 "name": "Chemin du R\u00e9servoir",
 "slug": "chemin-du-reservoir",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 39.266508960722035,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1085.0,
   "end_distance_m": 1087.0,
   "start_elevation_m": 327.38279544488677,
   "end_elevation_m": 328.1681256241012,
   "min_gradient_pct": -54.74284617495471,
   "suppressed_max_gradient_pct": 57.444035942600635,
   "suppressed_location_m": [
    1090.0,
    1092.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.283754358629192,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1085.0,
   "end_distance_m": 1088.0,
   "start_elevation_m": 327.38279544488677,
   "end_elevation_m": 328.23130807564564,
   "min_gradient_pct": -38.39332849934939,
   "suppressed_max_gradient_pct": 42.695655654504584,
   "suppressed_location_m": [
    1089.0,
    1092.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.050892471233738,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 718.0,
   "end_distance_m": 723.0,
   "start_elevation_m": 277.8262347354279,
   "end_elevation_m": 278.87877935898956,
   "min_gradient_pct": -20.301157783571853,
   "suppressed_max_gradient_pct": 27.59257534827725,
   "suppressed_location_m": [
    1087.0,
    1092.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.550556980859938,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 262.0,
   "end_distance_m": 272.0,
   "start_elevation_m": 222.76270618374224,
   "end_elevation_m": 224.81776188182823,
   "min_gradient_pct": -6.271205232134207,
   "suppressed_max_gradient_pct": 20.708140751614792,
   "suppressed_location_m": [
    528.0,
    538.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.015688016848685,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 763.0,
   "end_distance_m": 783.0,
   "start_elevation_m": 286.34016475487147,
   "end_elevation_m": 290.3433023582412,
   "min_gradient_pct": 0.7268220502081135
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 19.70306023946432,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 712.0,
   "end_distance_m": 737.0,
   "start_elevation_m": 276.6989496891757,
   "end_elevation_m": 281.6247147490418,
   "min_gradient_pct": 1.0040482517421196
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.23378964871256,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 701.0,
   "end_distance_m": 751.0,
   "start_elevation_m": 274.60021170951705,
   "end_elevation_m": 284.21710653387333,
   "min_gradient_pct": 2.798930010789377
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.103482399752806,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 699.0,
   "end_distance_m": 799.0,
   "start_elevation_m": 274.2293879571979,
   "end_elevation_m": 293.3328703569507,
   "min_gradient_pct": 4.604336800117011
  }
 ],
 "shape": {
  "ascent_concentration": 0.336,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 222.0,
  "shape_class": "sustained"
 },
 "length_m": 1608.110889247465,
 "start_elevation_m": 202.66310249169797,
 "end_elevation_m": 370.3383986777346,
 "endpoint_gain_m": 167.6752961860366,
 "overall_gradient_pct": 10.42684912509375,
 "accumulated_ascent_m": 170.09887693210155,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.050892471233738,
   "start_distance_m": 718.0,
   "end_distance_m": 723.0,
   "midpoint_distance_m": 720.5,
   "start_elevation_m": 277.8262347354279,
   "end_elevation_m": 278.87877935898956,
   "start_xy": [
    884458.101252704,
    6443367.653613968
   ],
   "end_xy": [
    884457.7717337392,
    6443372.642743877
   ]
  },
  "max_10m": {
   "gradient_pct": 20.550556980859938,
   "start_distance_m": 262.0,
   "end_distance_m": 272.0,
   "midpoint_distance_m": 267.0,
   "start_elevation_m": 222.76270618374224,
   "end_elevation_m": 224.81776188182823,
   "start_xy": [
    884208.4070688091,
    6443234.660808169
   ],
   "end_xy": [
    884209.2949005032,
    6443244.62131794
   ]
  },
  "max_20m": {
   "gradient_pct": 20.015688016848685,
   "start_distance_m": 763.0,
   "end_distance_m": 783.0,
   "midpoint_distance_m": 773.0,
   "start_elevation_m": 286.34016475487147,
   "end_elevation_m": 290.3433023582412,
   "start_xy": [
    884456.2930310976,
    6443412.578803758
   ],
   "end_xy": [
    884456.8165445381,
    6443432.5719509255
   ]
  },
  "max_25m": {
   "gradient_pct": 19.70306023946432,
   "start_distance_m": 712.0,
   "end_distance_m": 737.0,
   "midpoint_distance_m": 724.5,
   "start_elevation_m": 276.6989496891757,
   "end_elevation_m": 281.6247147490418,
   "start_xy": [
    884458.4992943272,
    6443361.666831884
   ],
   "end_xy": [
    884456.8490806376,
    6443386.612307624
   ]
  },
  "max_50m": {
   "gradient_pct": 19.23378964871256,
   "start_distance_m": 701.0,
   "end_distance_m": 751.0,
   "midpoint_distance_m": 726.0,
   "start_elevation_m": 274.60021170951705,
   "end_elevation_m": 284.21710653387333,
   "start_xy": [
    884460.4571131294,
    6443350.863198556
   ],
   "end_xy": [
    884455.9789230333,
    6443400.582915457
   ]
  },
  "max_100m": {
   "gradient_pct": 19.103482399752806,
   "start_distance_m": 699.0,
   "end_distance_m": 799.0,
   "midpoint_distance_m": 749.0,
   "start_elevation_m": 274.2293879571979,
   "end_elevation_m": 293.3328703569507,
   "start_xy": [
    884460.8783086733,
    6443348.908052957
   ],
   "end_xy": [
    884458.5675547121,
    6443448.463106865
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -20.301157783571853,
   "start_distance_m": 1092.0,
   "end_distance_m": 1097.0,
   "midpoint_distance_m": 1094.5,
   "start_elevation_m": 329.54775439151507,
   "end_elevation_m": 328.5326965023365,
   "start_xy": [
    884453.0982462615,
    6443730.157867365
   ],
   "end_xy": [
    884454.2479883765,
    6443725.291853281
   ]
  },
  "min_10m": {
   "gradient_pct": -6.271205232134207,
   "start_distance_m": 1092.0,
   "end_distance_m": 1102.0,
   "midpoint_distance_m": 1097.0,
   "start_elevation_m": 329.54775439151507,
   "end_elevation_m": 328.92063386830165,
   "start_xy": [
    884453.0982462615,
    6443730.157867365
   ],
   "end_xy": [
    884455.3977304917,
    6443720.425839196
   ]
  },
  "min_20m": {
   "gradient_pct": 0.7268220502081135,
   "start_distance_m": 1092.0,
   "end_distance_m": 1112.0,
   "midpoint_distance_m": 1102.0,
   "start_elevation_m": 329.54775439151507,
   "end_elevation_m": 329.6931188015567,
   "start_xy": [
    884453.0982462615,
    6443730.157867365
   ],
   "end_xy": [
    884457.6972147219,
    6443710.693811027
   ]
  },
  "min_25m": {
   "gradient_pct": 1.0040482517421196,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 202.66310249169797,
   "end_elevation_m": 202.9141145546335,
   "start_xy": [
    884002.684,
    6443195.881
   ],
   "end_xy": [
    884024.9115900357,
    6443193.077252362
   ]
  },
  "min_50m": {
   "gradient_pct": 2.798930010789377,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 202.66310249169797,
   "end_elevation_m": 204.06256749709266,
   "start_xy": [
    884002.684,
    6443195.881
   ],
   "end_xy": [
    884049.7555872501,
    6443191.164747646
   ]
  },
  "min_100m": {
   "gradient_pct": 4.604336800117011,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 202.66310249169797,
   "end_elevation_m": 207.26743929181498,
   "start_xy": [
    884002.684,
    6443195.881
   ],
   "end_xy": [
    884099.3523935965,
    6443196.768394288
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 39.266508960722035,
   "start_distance_m": 1085.0,
   "end_distance_m": 1087.0,
   "midpoint_distance_m": 1086.0,
   "start_elevation_m": 327.38279544488677,
   "end_elevation_m": 328.1681256241012,
   "start_xy": [
    884446.5366588036,
    6443731.758302951
   ],
   "end_xy": [
    884448.3070503644,
    6443731.513234402
   ]
  },
  "max_3m": {
   "gradient_pct": 28.283754358629192,
   "start_distance_m": 1085.0,
   "end_distance_m": 1088.0,
   "midpoint_distance_m": 1086.5,
   "start_elevation_m": 327.38279544488677,
   "end_elevation_m": 328.23130807564564,
   "start_xy": [
    884446.5366588036,
    6443731.758302951
   ],
   "end_xy": [
    884449.271193964,
    6443731.247853319
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.004,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.023,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.029,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 5.0,
     "start_m": 533.0,
     "end_m": 538.0,
     "raw_pct": 26.49,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.157,
   "obstruction_max_height_m": 19.91,
   "flagged_windows_m": [
    10
   ]
  },
  "excluded_ranges_m": [
   [
    531.0,
    540.0
   ],
   [
    970.0,
    1000.0
   ],
   [
    1089.0,
    1094.0
   ]
  ],
  "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_E883-N6443_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E884-N6443_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E884-N6444_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:53:42+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": [
   "E883-N6443",
   "E884-N6443",
   "E884-N6444"
  ],
  "elevation_blocks": [
   "21LHD6OM@2024-10-24"
  ],
  "ign_dalles": [
   "LHD_FXX_0883_6444_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0884_6444_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0884_6445_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6OM"
  ],
  "ign_editions": [
   "2024-10-24"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0883_6444_MNT_O_0M50_LAMB93_IGN69": "2024-10-24",
   "LHD_FXX_0884_6444_MNT_O_0M50_LAMB93_IGN69": "2024-10-24",
   "LHD_FXX_0884_6445_MNT_O_0M50_LAMB93_IGN69": "2024-10-24"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 6,
  "carriageway": {
   "stations": 71,
   "stations_resolved": 71,
   "width_median_m": 4.5,
   "width_p10_m": 2.5,
   "width_min_m": 0.5,
   "width_max_m": 12.0,
   "bounded_share": 0.479,
   "unbounded_share": 0.521,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.25,
   "window_m": [
    712.0,
    737.0
   ],
   "width_at_max25_m": 5.0,
   "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": 71,
    "stations_resolved": 71,
    "width_median_m": 5.25,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.803,
    "unbounded_share": 0.197,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.75,
    "window_m": [
     712.0,
     737.0
    ],
    "width_at_max25_m": 6.5,
    "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": "Pont-en-Royans",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}