{
 "ocl_version": "0.1.0",
 "name": "Chemin du Tuf",
 "slug": "chemin-du-tuf",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 57.37567532018204,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 737.0,
   "end_distance_m": 739.0,
   "start_elevation_m": 505.98375118241825,
   "end_elevation_m": 507.1312646888219,
   "min_gradient_pct": -24.41582607798125
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 46.932232118342654,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 736.0,
   "end_distance_m": 739.0,
   "start_elevation_m": 505.7232977252716,
   "end_elevation_m": 507.1312646888219,
   "min_gradient_pct": -17.332835801014806
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 35.46431278103455,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 625.0,
   "end_distance_m": 630.0,
   "start_elevation_m": 478.4309909330103,
   "end_elevation_m": 480.20420657206205,
   "min_gradient_pct": -8.810703881409836
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 32.44270225443245,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 571.0,
   "end_distance_m": 581.0,
   "start_elevation_m": 464.280796804674,
   "end_elevation_m": 467.52506703011727,
   "min_gradient_pct": -3.1098548405083193
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 31.008100899792055,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 559.0,
   "end_distance_m": 579.0,
   "start_elevation_m": 460.7228324673195,
   "end_elevation_m": 466.9244526472779,
   "min_gradient_pct": -0.2904821200351648
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 30.89617746338149,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 571.0,
   "end_distance_m": 596.0,
   "start_elevation_m": 464.280796804674,
   "end_elevation_m": 472.0048411705194,
   "min_gradient_pct": 0.35119347484373975
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 29.174177420935735,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 559.0,
   "end_distance_m": 609.0,
   "start_elevation_m": 460.7228324673195,
   "end_elevation_m": 475.3099211777874,
   "min_gradient_pct": 1.5220801492085911
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 27.071954396199317,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 559.0,
   "end_distance_m": 659.0,
   "start_elevation_m": 460.7228324673195,
   "end_elevation_m": 487.7947868635188,
   "min_gradient_pct": 2.8087484124096136
  }
 ],
 "shape": {
  "ascent_concentration": 0.472,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 214.0,
  "shape_class": "stepped"
 },
 "length_m": 739.144087731177,
 "start_elevation_m": 407.4926814404337,
 "end_elevation_m": 507.18740368361495,
 "endpoint_gain_m": 99.69472224318122,
 "overall_gradient_pct": 13.487860337109224,
 "accumulated_ascent_m": 100.65685160190486,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 35.46431278103455,
   "start_distance_m": 625.0,
   "end_distance_m": 630.0,
   "midpoint_distance_m": 627.5,
   "start_elevation_m": 478.4309909330103,
   "end_elevation_m": 480.20420657206205,
   "start_xy": [
    1027380.6934822085,
    6300157.03470758
   ],
   "end_xy": [
    1027380.9262474405,
    6300162.029286675
   ]
  },
  "max_10m": {
   "gradient_pct": 32.44270225443245,
   "start_distance_m": 571.0,
   "end_distance_m": 581.0,
   "midpoint_distance_m": 576.0,
   "start_elevation_m": 464.280796804674,
   "end_elevation_m": 467.52506703011727,
   "start_xy": [
    1027367.8959014933,
    6300106.348387523
   ],
   "end_xy": [
    1027373.9211991978,
    6300114.288409259
   ]
  },
  "max_20m": {
   "gradient_pct": 31.008100899792055,
   "start_distance_m": 559.0,
   "end_distance_m": 579.0,
   "midpoint_distance_m": 569.0,
   "start_elevation_m": 460.7228324673195,
   "end_elevation_m": 466.9244526472779,
   "start_xy": [
    1027364.2996949769,
    6300094.995516638
   ],
   "end_xy": [
    1027372.8747425703,
    6300112.584024171
   ]
  },
  "max_25m": {
   "gradient_pct": 30.89617746338149,
   "start_distance_m": 571.0,
   "end_distance_m": 596.0,
   "midpoint_distance_m": 583.5,
   "start_elevation_m": 464.280796804674,
   "end_elevation_m": 472.0048411705194,
   "start_xy": [
    1027367.8959014933,
    6300106.348387523
   ],
   "end_xy": [
    1027379.3434438626,
    6300128.066148822
   ]
  },
  "max_50m": {
   "gradient_pct": 29.174177420935735,
   "start_distance_m": 559.0,
   "end_distance_m": 609.0,
   "midpoint_distance_m": 584.0,
   "start_elevation_m": 460.7228324673195,
   "end_elevation_m": 475.3099211777874,
   "start_xy": [
    1027364.2996949769,
    6300094.995516638
   ],
   "end_xy": [
    1027379.9486334659,
    6300141.052054472
   ]
  },
  "max_100m": {
   "gradient_pct": 27.071954396199317,
   "start_distance_m": 559.0,
   "end_distance_m": 659.0,
   "midpoint_distance_m": 609.0,
   "start_elevation_m": 460.7228324673195,
   "end_elevation_m": 487.7947868635188,
   "start_xy": [
    1027364.2996949769,
    6300094.995516638
   ],
   "end_xy": [
    1027382.2762857863,
    6300190.997845433
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.810703881409836,
   "start_distance_m": 54.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 56.5,
   "start_elevation_m": 408.57315767207285,
   "end_elevation_m": 408.13262247800236,
   "start_xy": [
    1027242.479235179,
    6299684.751027494
   ],
   "end_xy": [
    1027242.0271546703,
    6299689.730547874
   ]
  },
  "min_10m": {
   "gradient_pct": -3.1098548405083193,
   "start_distance_m": 49.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 54.0,
   "start_elevation_m": 408.4436079620532,
   "end_elevation_m": 408.13262247800236,
   "start_xy": [
    1027242.9313156877,
    6299679.771507114
   ],
   "end_xy": [
    1027242.0271546703,
    6299689.730547874
   ]
  },
  "min_20m": {
   "gradient_pct": -0.2904821200351648,
   "start_distance_m": 39.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 49.0,
   "start_elevation_m": 408.1907189020094,
   "end_elevation_m": 408.13262247800236,
   "start_xy": [
    1027243.835476705,
    6299669.812466354
   ],
   "end_xy": [
    1027242.0271546703,
    6299689.730547874
   ]
  },
  "min_25m": {
   "gradient_pct": 0.35119347484373975,
   "start_distance_m": 34.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 46.5,
   "start_elevation_m": 408.0448241092914,
   "end_elevation_m": 408.13262247800236,
   "start_xy": [
    1027245.5075063644,
    6299665.1594579015
   ],
   "end_xy": [
    1027242.0271546703,
    6299689.730547874
   ]
  },
  "min_50m": {
   "gradient_pct": 1.5220801492085911,
   "start_distance_m": 9.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 34.0,
   "start_elevation_m": 407.37158240339807,
   "end_elevation_m": 408.13262247800236,
   "start_xy": [
    1027255.9858105083,
    6299642.461327092
   ],
   "end_xy": [
    1027242.0271546703,
    6299689.730547874
   ]
  },
  "min_100m": {
   "gradient_pct": 2.8087484124096136,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 407.4926814404337,
   "end_elevation_m": 410.30142985284334,
   "start_xy": [
    1027259.758,
    6299634.29
   ],
   "end_xy": [
    1027261.2248408719,
    6299723.453498298
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 57.37567532018204,
   "start_distance_m": 737.0,
   "end_distance_m": 739.0,
   "midpoint_distance_m": 738.0,
   "start_elevation_m": 505.98375118241825,
   "end_elevation_m": 507.1312646888219,
   "start_xy": [
    1027389.7127582006,
    6300265.917969314
   ],
   "end_xy": [
    1027390.827676944,
    6300267.578377757
   ]
  },
  "max_3m": {
   "gradient_pct": 46.932232118342654,
   "start_distance_m": 736.0,
   "end_distance_m": 739.0,
   "midpoint_distance_m": 737.5,
   "start_elevation_m": 505.7232977252716,
   "end_elevation_m": 507.1312646888219,
   "start_xy": [
    1027389.1552988288,
    6300265.087765094
   ],
   "end_xy": [
    1027390.827676944,
    6300267.578377757
   ]
  }
 },
 "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": 0.19,
   "obstruction_max_height_m": 14.7,
   "flagged_windows_m": [
    2,
    3,
    5,
    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_E1027-N6299_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1027-N6300_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:34:04+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": [
   "E1027-N6299",
   "E1027-N6300"
  ],
  "elevation_blocks": [
   "21LHD8RP@2025-03-06"
  ],
  "ign_dalles": [
   "LHD_FXX_1027_6300_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_1027_6301_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8RP"
  ],
  "ign_editions": [
   "2025-03-06"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1027_6300_MNT_O_0M50_LAMB93_IGN69": "2025-03-06",
   "LHD_FXX_1027_6301_MNT_O_0M50_LAMB93_IGN69": "2025-03-06"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 36,
   "stations_resolved": 36,
   "width_median_m": 4.0,
   "width_p10_m": 2.88,
   "width_min_m": 1.5,
   "width_max_m": 12.0,
   "bounded_share": 0.444,
   "unbounded_share": 0.556,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.38,
   "window_m": [
    571.0,
    596.0
   ],
   "width_at_max25_m": 4.25,
   "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": 36,
    "stations_resolved": 36,
    "width_median_m": 4.25,
    "width_p10_m": 1.62,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.889,
    "unbounded_share": 0.111,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.0,
    "window_m": [
     571.0,
     596.0
    ],
    "width_at_max25_m": 4.25,
    "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": "Tourrettes-sur-Loup",
  "county": "Alpes-Maritimes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}