{
 "ocl_version": "0.1.0",
 "name": "Chemin des Tryots",
 "slug": "chemin-des-tryots",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.45704580513427,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1367.0,
   "end_distance_m": 1369.0,
   "start_elevation_m": 388.2381673095046,
   "end_elevation_m": 389.0073082256073,
   "min_gradient_pct": -8.748016269510117
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.293609615309684,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1367.0,
   "end_distance_m": 1370.0,
   "start_elevation_m": 388.2381673095046,
   "end_elevation_m": 389.3269755979639,
   "min_gradient_pct": -8.09681870437847
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 33.225427991325205,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1374.0,
   "end_distance_m": 1379.0,
   "start_elevation_m": 390.19084921249294,
   "end_elevation_m": 391.8521206120592,
   "min_gradient_pct": -7.45826862760282
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.708723680459798,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1368.0,
   "end_distance_m": 1378.0,
   "start_elevation_m": 388.59614261167314,
   "end_elevation_m": 391.4670149797191,
   "min_gradient_pct": -5.885989280740773
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.45218012836324,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1360.0,
   "end_distance_m": 1380.0,
   "start_elevation_m": 386.76044936151425,
   "end_elevation_m": 392.0508853871869,
   "min_gradient_pct": -5.42596060837667
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.38097246293296,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1355.0,
   "end_distance_m": 1380.0,
   "start_elevation_m": 385.95564227145366,
   "end_elevation_m": 392.0508853871869,
   "min_gradient_pct": -5.147108807825816
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.44934669539657,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1360.0,
   "end_distance_m": 1410.0,
   "start_elevation_m": 386.76044936151425,
   "end_elevation_m": 396.48512270921253,
   "min_gradient_pct": -3.1153697281232553
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.636688823663064,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1324.0,
   "end_distance_m": 1424.0,
   "start_elevation_m": 381.250079798576,
   "end_elevation_m": 398.88676862223906,
   "min_gradient_pct": -0.719726369555076
  }
 ],
 "shape": {
  "ascent_concentration": 0.404,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 160.0,
  "shape_class": "sustained"
 },
 "length_m": 1653.146680215307,
 "start_elevation_m": 293.2466487067654,
 "end_elevation_m": 410.9897566953042,
 "endpoint_gain_m": 117.74310798853878,
 "overall_gradient_pct": 7.122363030315243,
 "accumulated_ascent_m": 122.90607172827504,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 33.225427991325205,
   "start_distance_m": 1374.0,
   "end_distance_m": 1379.0,
   "midpoint_distance_m": 1376.5,
   "start_elevation_m": 390.19084921249294,
   "end_elevation_m": 391.8521206120592,
   "start_xy": [
    916689.0521257815,
    6550849.911506111
   ],
   "end_xy": [
    916685.4535519148,
    6550846.440156788
   ]
  },
  "max_10m": {
   "gradient_pct": 28.708723680459798,
   "start_distance_m": 1368.0,
   "end_distance_m": 1378.0,
   "midpoint_distance_m": 1373.0,
   "start_elevation_m": 388.59614261167314,
   "end_elevation_m": 391.4670149797191,
   "start_xy": [
    916693.7496214487,
    6550853.618693437
   ],
   "end_xy": [
    916686.1732666881,
    6550847.1344266515
   ]
  },
  "max_20m": {
   "gradient_pct": 26.45218012836324,
   "start_distance_m": 1360.0,
   "end_distance_m": 1380.0,
   "midpoint_distance_m": 1370.0,
   "start_elevation_m": 386.76044936151425,
   "end_elevation_m": 392.0508853871869,
   "start_xy": [
    916700.2847773166,
    6550858.232990543
   ],
   "end_xy": [
    916684.7338371414,
    6550845.745886923
   ]
  },
  "max_25m": {
   "gradient_pct": 24.38097246293296,
   "start_distance_m": 1355.0,
   "end_distance_m": 1380.0,
   "midpoint_distance_m": 1367.5,
   "start_elevation_m": 385.95564227145366,
   "end_elevation_m": 392.0508853871869,
   "start_xy": [
    916704.495316855,
    6550860.877091787
   ],
   "end_xy": [
    916684.7338371414,
    6550845.745886923
   ]
  },
  "max_50m": {
   "gradient_pct": 19.44934669539657,
   "start_distance_m": 1360.0,
   "end_distance_m": 1410.0,
   "midpoint_distance_m": 1385.0,
   "start_elevation_m": 386.76044936151425,
   "end_elevation_m": 396.48512270921253,
   "start_xy": [
    916700.2847773166,
    6550858.232990543
   ],
   "end_xy": [
    916661.4735423448,
    6550826.973573421
   ]
  },
  "max_100m": {
   "gradient_pct": 17.636688823663064,
   "start_distance_m": 1324.0,
   "end_distance_m": 1424.0,
   "midpoint_distance_m": 1374.0,
   "start_elevation_m": 381.250079798576,
   "end_elevation_m": 398.88676862223906,
   "start_xy": [
    916734.8727273459,
    6550863.820762339
   ],
   "end_xy": [
    916649.7676940681,
    6550819.324766778
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.45826862760282,
   "start_distance_m": 631.0,
   "end_distance_m": 636.0,
   "midpoint_distance_m": 633.5,
   "start_elevation_m": 347.8244975156368,
   "end_elevation_m": 347.45158408425664,
   "start_xy": [
    916751.4624234746,
    6550640.678570692
   ],
   "end_xy": [
    916748.1594674194,
    6550636.924841707
   ]
  },
  "min_10m": {
   "gradient_pct": -5.885989280740773,
   "start_distance_m": 1260.0,
   "end_distance_m": 1270.0,
   "midpoint_distance_m": 1265.0,
   "start_elevation_m": 378.6888773362117,
   "end_elevation_m": 378.1002784081376,
   "start_xy": [
    916734.4706634998,
    6550847.925954684
   ],
   "end_xy": [
    916743.772337027,
    6550851.442581387
   ]
  },
  "min_20m": {
   "gradient_pct": -5.42596060837667,
   "start_distance_m": 1253.0,
   "end_distance_m": 1273.0,
   "midpoint_distance_m": 1263.0,
   "start_elevation_m": 379.0671503612497,
   "end_elevation_m": 377.98195823957434,
   "start_xy": [
    916728.9006412661,
    6550843.733936416
   ],
   "end_xy": [
    916746.6924347379,
    6550852.130352685
   ]
  },
  "min_25m": {
   "gradient_pct": -5.147108807825816,
   "start_distance_m": 1253.0,
   "end_distance_m": 1278.0,
   "midpoint_distance_m": 1265.5,
   "start_elevation_m": 379.0671503612497,
   "end_elevation_m": 377.7803731592932,
   "start_xy": [
    916728.9006412661,
    6550843.733936416
   ],
   "end_xy": [
    916751.6551085762,
    6550852.658736817
   ]
  },
  "min_50m": {
   "gradient_pct": -3.1153697281232553,
   "start_distance_m": 1244.0,
   "end_distance_m": 1294.0,
   "midpoint_distance_m": 1269.0,
   "start_elevation_m": 379.0761351234862,
   "end_elevation_m": 377.5184502594246,
   "start_xy": [
    916727.1393662723,
    6550835.441827673
   ],
   "end_xy": [
    916764.4496955974,
    6550858.800508456
   ]
  },
  "min_100m": {
   "gradient_pct": -0.719726369555076,
   "start_distance_m": 551.0,
   "end_distance_m": 651.0,
   "midpoint_distance_m": 601.0,
   "start_elevation_m": 347.94872271534376,
   "end_elevation_m": 347.2289963457887,
   "start_xy": [
    916805.5288420904,
    6550699.482619093
   ],
   "end_xy": [
    916738.2505992537,
    6550625.66365475
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.45704580513427,
   "start_distance_m": 1367.0,
   "end_distance_m": 1369.0,
   "midpoint_distance_m": 1368.0,
   "start_elevation_m": 388.2381673095046,
   "end_elevation_m": 389.0073082256073,
   "start_xy": [
    916694.5665159322,
    6550854.195480576
   ],
   "end_xy": [
    916692.9327269652,
    6550853.041906299
   ]
  },
  "max_3m": {
   "gradient_pct": 36.293609615309684,
   "start_distance_m": 1367.0,
   "end_distance_m": 1370.0,
   "midpoint_distance_m": 1368.5,
   "start_elevation_m": 388.2381673095046,
   "end_elevation_m": 389.3269755979639,
   "start_xy": [
    916694.5665159322,
    6550854.195480576
   ],
   "end_xy": [
    916692.1158324816,
    6550852.465119161
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.043,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.233,
   "obstruction_max_height_m": 29.77,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    120.0,
    190.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "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_E916-N6550_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:48:23+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": [
   "E916-N6550"
  ],
  "elevation_blocks": [
   "21LHD5PK1@2024-12-19"
  ],
  "ign_dalles": [
   "LHD_FXX_0916_6551_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD5PK1"
  ],
  "ign_editions": [
   "2024-12-19"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0916_6551_MNT_O_0M50_LAMB93_IGN69": "2024-12-19"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 5,
  "carriageway": {
   "stations": 72,
   "stations_resolved": 72,
   "width_median_m": 5.25,
   "width_p10_m": 3.53,
   "width_min_m": 1.0,
   "width_max_m": 12.0,
   "bounded_share": 0.181,
   "unbounded_share": 0.819,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.0,
   "window_m": [
    1355.0,
    1380.0
   ],
   "width_at_max25_m": 4.12,
   "window_stations": 6,
   "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": 72,
    "stations_resolved": 72,
    "width_median_m": 6.0,
    "width_p10_m": 0.55,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.736,
    "unbounded_share": 0.264,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.75,
    "window_m": [
     1355.0,
     1380.0
    ],
    "width_at_max25_m": 2.5,
    "window_stations": 6,
    "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": "Surjoux-Lhopital",
  "county": "Ain",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}