{
 "ocl_version": "0.1.0",
 "name": "Impasse des Roches",
 "slug": "impasse-des-roches",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 26.60082861243893,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 217.0,
   "end_distance_m": 219.0,
   "start_elevation_m": 326.0484059418945,
   "end_elevation_m": 326.58042251414327,
   "min_gradient_pct": -4.589312616519692
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.840064093445864,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 216.0,
   "end_distance_m": 219.0,
   "start_elevation_m": 325.8052205913399,
   "end_elevation_m": 326.58042251414327,
   "min_gradient_pct": -4.119724845674
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.238648984548036,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 214.0,
   "end_distance_m": 219.0,
   "start_elevation_m": 325.31849006491586,
   "end_elevation_m": 326.58042251414327,
   "min_gradient_pct": -3.5050756452926635
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.787587880337355,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 214.0,
   "end_distance_m": 224.0,
   "start_elevation_m": 325.31849006491586,
   "end_elevation_m": 327.6972488529496,
   "min_gradient_pct": -3.065199143773043
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.844208558547905,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 212.0,
   "end_distance_m": 232.0,
   "start_elevation_m": 324.8717496912866,
   "end_elevation_m": 329.4405914029962,
   "min_gradient_pct": -2.1720247899065726
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.315574192690974,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 212.0,
   "end_distance_m": 237.0,
   "start_elevation_m": 324.8717496912866,
   "end_elevation_m": 330.45064323945934,
   "min_gradient_pct": -1.3755581345728842
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.192113922786803,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 195.0,
   "end_distance_m": 245.0,
   "start_elevation_m": 321.8016344167271,
   "end_elevation_m": 331.8976913781205,
   "min_gradient_pct": -0.18620482432550034
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.385292064193436,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 169.0,
   "end_distance_m": 269.0,
   "start_elevation_m": 317.3979960017866,
   "end_elevation_m": 335.78328806598006,
   "min_gradient_pct": 1.8119751191178466
  }
 ],
 "shape": {
  "ascent_concentration": 0.405,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 132.0,
  "shape_class": "sustained"
 },
 "length_m": 684.2254497290812,
 "start_elevation_m": 309.3676738118915,
 "end_elevation_m": 370.54837285058477,
 "endpoint_gain_m": 61.18069903869326,
 "overall_gradient_pct": 8.941599448386162,
 "accumulated_ascent_m": 61.74704039126556,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.238648984548036,
   "start_distance_m": 214.0,
   "end_distance_m": 219.0,
   "midpoint_distance_m": 216.5,
   "start_elevation_m": 325.31849006491586,
   "end_elevation_m": 326.58042251414327,
   "start_xy": [
    859237.6871617768,
    6464395.475452341
   ],
   "end_xy": [
    859236.4816613853,
    6464400.302279283
   ]
  },
  "max_10m": {
   "gradient_pct": 23.787587880337355,
   "start_distance_m": 214.0,
   "end_distance_m": 224.0,
   "midpoint_distance_m": 219.0,
   "start_elevation_m": 325.31849006491586,
   "end_elevation_m": 327.6972488529496,
   "start_xy": [
    859237.6871617768,
    6464395.475452341
   ],
   "end_xy": [
    859236.8984919576,
    6464405.284874217
   ]
  },
  "max_20m": {
   "gradient_pct": 22.844208558547905,
   "start_distance_m": 212.0,
   "end_distance_m": 232.0,
   "midpoint_distance_m": 222.0,
   "start_elevation_m": 324.8717496912866,
   "end_elevation_m": 329.4405914029962,
   "start_xy": [
    859238.2613493426,
    6464393.562672004
   ],
   "end_xy": [
    859239.5331245605,
    6464412.743220826
   ]
  },
  "max_25m": {
   "gradient_pct": 22.315574192690974,
   "start_distance_m": 212.0,
   "end_distance_m": 237.0,
   "midpoint_distance_m": 224.5,
   "start_elevation_m": 324.8717496912866,
   "end_elevation_m": 330.45064323945934,
   "start_xy": [
    859238.2613493426,
    6464393.562672004
   ],
   "end_xy": [
    859241.4498604567,
    6464417.36048984
   ]
  },
  "max_50m": {
   "gradient_pct": 20.192113922786803,
   "start_distance_m": 195.0,
   "end_distance_m": 245.0,
   "midpoint_distance_m": 220.0,
   "start_elevation_m": 321.8016344167271,
   "end_elevation_m": 331.8976913781205,
   "start_xy": [
    859248.5492516289,
    6464380.587521151
   ],
   "end_xy": [
    859243.5231298275,
    6464425.042464083
   ]
  },
  "max_100m": {
   "gradient_pct": 18.385292064193436,
   "start_distance_m": 169.0,
   "end_distance_m": 269.0,
   "midpoint_distance_m": 219.0,
   "start_elevation_m": 317.3979960017866,
   "end_elevation_m": 335.78328806598006,
   "start_xy": [
    859272.7300076905,
    6464371.091044325
   ],
   "end_xy": [
    859245.2517818004,
    6464448.954512553
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.5050756452926635,
   "start_distance_m": 1.0,
   "end_distance_m": 6.0,
   "midpoint_distance_m": 3.5,
   "start_elevation_m": 309.36462084489983,
   "end_elevation_m": 309.1893670626352,
   "start_xy": [
    859329.074275164,
    6464220.512210093
   ],
   "end_xy": [
    859326.4591549704,
    6464224.76735855
   ]
  },
  "min_10m": {
   "gradient_pct": -3.065199143773043,
   "start_distance_m": 1.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 6.0,
   "start_elevation_m": 309.36462084489983,
   "end_elevation_m": 309.0581009305225,
   "start_xy": [
    859329.074275164,
    6464220.512210093
   ],
   "end_xy": [
    859323.9941535321,
    6464229.117504285
   ]
  },
  "min_20m": {
   "gradient_pct": -2.1720247899065726,
   "start_distance_m": 1.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 309.36462084489983,
   "end_elevation_m": 308.9302158869185,
   "start_xy": [
    859329.074275164,
    6464220.512210093
   ],
   "end_xy": [
    859320.1702274843,
    6464238.309984367
   ]
  },
  "min_25m": {
   "gradient_pct": -1.3755581345728842,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 309.3676738118915,
   "end_elevation_m": 309.0237842782483,
   "start_xy": [
    859329.547,
    6464219.631
   ],
   "end_xy": [
    859318.9050608338,
    6464242.104632354
   ]
  },
  "min_50m": {
   "gradient_pct": -0.18620482432550034,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 309.3676738118915,
   "end_elevation_m": 309.27457139972876,
   "start_xy": [
    859329.547,
    6464219.631
   ],
   "end_xy": [
    859314.3299507252,
    6464266.620931881
   ]
  },
  "min_100m": {
   "gradient_pct": 1.8119751191178466,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 309.3676738118915,
   "end_elevation_m": 311.17964893100935,
   "start_xy": [
    859329.547,
    6464219.631
   ],
   "end_xy": [
    859310.6142747846,
    6464316.166100392
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 26.60082861243893,
   "start_distance_m": 217.0,
   "end_distance_m": 219.0,
   "midpoint_distance_m": 218.0,
   "start_elevation_m": 326.0484059418945,
   "end_elevation_m": 326.58042251414327,
   "start_xy": [
    859236.8727924237,
    6464398.362804512
   ],
   "end_xy": [
    859236.4816613853,
    6464400.302279283
   ]
  },
  "max_3m": {
   "gradient_pct": 25.840064093445864,
   "start_distance_m": 216.0,
   "end_distance_m": 219.0,
   "midpoint_distance_m": 217.5,
   "start_elevation_m": 325.8052205913399,
   "end_elevation_m": 326.58042251414327,
   "start_xy": [
    859237.1442488747,
    6464397.400353788
   ],
   "end_xy": [
    859236.4816613853,
    6464400.302279283
   ]
  }
 },
 "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": 0.185,
   "obstruction_max_height_m": 17.91,
   "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_E859-N6464_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:27:26+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": [
   "E859-N6464"
  ],
  "elevation_blocks": [
   "21LHD6OM@2024-10-24"
  ],
  "ign_dalles": [
   "LHD_FXX_0859_6465_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6OM"
  ],
  "ign_editions": [
   "2024-10-24"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0859_6465_MNT_O_0M50_LAMB93_IGN69": "2024-10-24"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 34,
   "stations_resolved": 34,
   "width_median_m": 4.88,
   "width_p10_m": 3.25,
   "width_min_m": 2.5,
   "width_max_m": 11.25,
   "bounded_share": 0.265,
   "unbounded_share": 0.735,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.75,
   "window_m": [
    212.0,
    237.0
   ],
   "width_at_max25_m": 3.75,
   "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": 34,
    "stations_resolved": 34,
    "width_median_m": 6.25,
    "width_p10_m": 1.5,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.647,
    "unbounded_share": 0.353,
    "confidence_median": 0.984,
    "width_median_bounded_m": 4.38,
    "window_m": [
     212.0,
     237.0
    ],
    "width_at_max25_m": 6.25,
    "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": "Hauterives",
  "county": "Dr\u00f4me",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}