{
 "ocl_version": "0.1.0",
 "name": "Stretta l'Appiattu",
 "slug": "stretta-l-appiattu-2",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.744361428358502,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 223.0,
   "end_distance_m": 225.0,
   "start_elevation_m": 146.90380920319606,
   "end_elevation_m": 147.51869643176323,
   "min_gradient_pct": -5.127940567877687,
   "suppressed_max_gradient_pct": 37.01860591630748,
   "suppressed_location_m": [
    182.0,
    184.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.337544675811046,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 222.0,
   "end_distance_m": 225.0,
   "start_elevation_m": 146.6085700914889,
   "end_elevation_m": 147.51869643176323,
   "min_gradient_pct": -3.6345520806174627,
   "suppressed_max_gradient_pct": 35.01744711216096,
   "suppressed_location_m": [
    182.0,
    185.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.811482530691933,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 212.0,
   "end_distance_m": 217.0,
   "start_elevation_m": 143.68461779966097,
   "end_elevation_m": 145.17519192619557,
   "min_gradient_pct": -1.2267099141868698,
   "suppressed_max_gradient_pct": 32.61783227214437,
   "suppressed_location_m": [
    182.0,
    187.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.368336286954957,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 215.0,
   "end_distance_m": 225.0,
   "start_elevation_m": 144.58186280306774,
   "end_elevation_m": 147.51869643176323,
   "min_gradient_pct": -0.4934954558811455,
   "suppressed_max_gradient_pct": 31.470794162824518,
   "suppressed_location_m": [
    182.0,
    192.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 29.222674847678007,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 211.0,
   "end_distance_m": 231.0,
   "start_elevation_m": 143.40210763116588,
   "end_elevation_m": 149.24664260070148,
   "min_gradient_pct": 0.18866064982432817,
   "suppressed_max_gradient_pct": 30.990389774794522,
   "suppressed_location_m": [
    182.0,
    202.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 28.85924484110069,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 210.0,
   "end_distance_m": 235.0,
   "start_elevation_m": 143.1511627092811,
   "end_elevation_m": 150.36597391955627,
   "min_gradient_pct": 0.45058807318912386,
   "suppressed_max_gradient_pct": 30.56589215426891,
   "suppressed_location_m": [
    181.0,
    206.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.60661252117663,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 21.0,
   "end_distance_m": 71.0,
   "start_elevation_m": 115.3487003453588,
   "end_elevation_m": 123.65200660594711,
   "min_gradient_pct": 2.481214474456692,
   "suppressed_max_gradient_pct": 29.707468476618715,
   "suppressed_location_m": [
    181.0,
    231.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.068266737803329,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 8.0,
   "end_distance_m": 108.0,
   "start_elevation_m": 113.58471829689168,
   "end_elevation_m": 128.652985034695,
   "min_gradient_pct": 8.56543171593816,
   "suppressed_max_gradient_pct": 22.578173903396106,
   "suppressed_location_m": [
    141.0,
    241.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.452,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 93.0,
  "shape_class": "stepped"
 },
 "length_m": 241.40833421123853,
 "start_elevation_m": 113.29145448059948,
 "end_elevation_m": 151.6637820966536,
 "endpoint_gain_m": 38.37232761605411,
 "overall_gradient_pct": 15.89519588933385,
 "accumulated_ascent_m": 38.557225361529305,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.811482530691933,
   "start_distance_m": 212.0,
   "end_distance_m": 217.0,
   "midpoint_distance_m": 214.5,
   "start_elevation_m": 143.68461779966097,
   "end_elevation_m": 145.17519192619557,
   "start_xy": [
    1187973.309493444,
    6187299.812581248
   ],
   "end_xy": [
    1187974.5401831022,
    6187294.966407193
   ]
  },
  "max_10m": {
   "gradient_pct": 29.368336286954957,
   "start_distance_m": 215.0,
   "end_distance_m": 225.0,
   "midpoint_distance_m": 220.0,
   "start_elevation_m": 144.58186280306774,
   "end_elevation_m": 147.51869643176323,
   "start_xy": [
    1187974.047907239,
    6187296.904876815
   ],
   "end_xy": [
    1187976.5092865555,
    6187287.2125287065
   ]
  },
  "max_20m": {
   "gradient_pct": 29.222674847678007,
   "start_distance_m": 211.0,
   "end_distance_m": 231.0,
   "midpoint_distance_m": 221.0,
   "start_elevation_m": 143.40210763116588,
   "end_elevation_m": 149.24664260070148,
   "start_xy": [
    1187973.0633555125,
    6187300.781816059
   ],
   "end_xy": [
    1187977.9861141453,
    6187281.397119841
   ]
  },
  "max_25m": {
   "gradient_pct": 28.85924484110069,
   "start_distance_m": 210.0,
   "end_distance_m": 235.0,
   "midpoint_distance_m": 222.5,
   "start_elevation_m": 143.1511627092811,
   "end_elevation_m": 150.36597391955627,
   "start_xy": [
    1187972.8172175807,
    6187301.751050869
   ],
   "end_xy": [
    1187978.9706658719,
    6187277.520180598
   ]
  },
  "max_50m": {
   "gradient_pct": 16.60661252117663,
   "start_distance_m": 21.0,
   "end_distance_m": 71.0,
   "midpoint_distance_m": 46.0,
   "start_elevation_m": 115.3487003453588,
   "end_elevation_m": 123.65200660594711,
   "start_xy": [
    1187911.0250516057,
    6187371.815336013
   ],
   "end_xy": [
    1187902.4790456265,
    6187323.528931224
   ]
  },
  "max_100m": {
   "gradient_pct": 15.068266737803329,
   "start_distance_m": 8.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 58.0,
   "start_elevation_m": 113.58471829689168,
   "end_elevation_m": 128.652985034695,
   "start_xy": [
    1187909.0669005464,
    6187384.607882784
   ],
   "end_xy": [
    1187910.2985833106,
    6187308.181460707
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.2267099141868698,
   "start_distance_m": 93.0,
   "end_distance_m": 98.0,
   "midpoint_distance_m": 95.5,
   "start_elevation_m": 127.82798829871109,
   "end_elevation_m": 127.76665280300175,
   "start_xy": [
    1187897.1311032523,
    6187302.341674745
   ],
   "end_xy": [
    1187901.5855052527,
    6187303.5499399165
   ]
  },
  "min_10m": {
   "gradient_pct": -0.4934954558811455,
   "start_distance_m": 119.0,
   "end_distance_m": 129.0,
   "midpoint_distance_m": 124.0,
   "start_elevation_m": 128.90823124745432,
   "end_elevation_m": 128.8588817018662,
   "start_xy": [
    1187919.090957158,
    6187314.79161669
   ],
   "end_xy": [
    1187926.4982673686,
    6187321.422902686
   ]
  },
  "min_20m": {
   "gradient_pct": 0.18866064982432817,
   "start_distance_m": 115.0,
   "end_distance_m": 135.0,
   "midpoint_distance_m": 125.0,
   "start_elevation_m": 128.87047752174067,
   "end_elevation_m": 128.90820965170553,
   "start_xy": [
    1187915.8937303044,
    6187312.387923606
   ],
   "end_xy": [
    1187930.385283783,
    6187325.993581343
   ]
  },
  "min_25m": {
   "gradient_pct": 0.45058807318912386,
   "start_distance_m": 114.0,
   "end_distance_m": 139.0,
   "midpoint_distance_m": 126.5,
   "start_elevation_m": 128.85429247829117,
   "end_elevation_m": 128.96693949658845,
   "start_xy": [
    1187915.094423591,
    6187311.787000335
   ],
   "end_xy": [
    1187932.9766280593,
    6187329.040700449
   ]
  },
  "min_50m": {
   "gradient_pct": 2.481214474456692,
   "start_distance_m": 93.0,
   "end_distance_m": 143.0,
   "midpoint_distance_m": 118.0,
   "start_elevation_m": 127.82798829871109,
   "end_elevation_m": 129.06859553593944,
   "start_xy": [
    1187897.1311032523,
    6187302.341674745
   ],
   "end_xy": [
    1187935.5679723355,
    6187332.087819554
   ]
  },
  "min_100m": {
   "gradient_pct": 8.56543171593816,
   "start_distance_m": 55.0,
   "end_distance_m": 155.0,
   "midpoint_distance_m": 105.0,
   "start_elevation_m": 121.24411082713436,
   "end_elevation_m": 129.80954254307252,
   "start_xy": [
    1187908.0777067603,
    6187338.517426595
   ],
   "end_xy": [
    1187944.9373578627,
    6187338.976891141
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.744361428358502,
   "start_distance_m": 223.0,
   "end_distance_m": 225.0,
   "midpoint_distance_m": 224.0,
   "start_elevation_m": 146.90380920319606,
   "end_elevation_m": 147.51869643176323,
   "start_xy": [
    1187976.017010692,
    6187289.150998328
   ],
   "end_xy": [
    1187976.5092865555,
    6187287.2125287065
   ]
  },
  "max_3m": {
   "gradient_pct": 30.337544675811046,
   "start_distance_m": 222.0,
   "end_distance_m": 225.0,
   "midpoint_distance_m": 223.5,
   "start_elevation_m": 146.6085700914889,
   "end_elevation_m": 147.51869643176323,
   "start_xy": [
    1187975.7708727606,
    6187290.120233139
   ],
   "end_xy": [
    1187976.5092865555,
    6187287.2125287065
   ]
  }
 },
 "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": {
  "texture_suppression": {
   "masked_fraction": 0.124,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 181.0,
     "end_m": 206.0,
     "raw_pct": 30.57,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 182.0,
     "end_m": 202.0,
     "raw_pct": 30.99,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.004,
   "obstruction_max_height_m": 2.43,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    179.0,
    208.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "33abfff569d4360542e616d0d42c1b94d0a711fa",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:8c94015b54267da4",
   "python": "3.14.4",
   "numpy": "2.5.3",
   "rasterio": "1.5.1",
   "pyproj": "3.8.0",
   "laspy": "2.7.0",
   "shapely": "2.1.2",
   "pyosmium": "4.3.1",
   "libosmium": "2.23.1",
   "gdal": "3.12.4",
   "proj": "9.8.1",
   "run_id": "fr-co2",
   "road_pbf": "block-batch-fr-co2.osm.pbf",
   "region_key": "france",
   "crs": "EPSG:2154",
   "elevation_provider_key": "ign-lidarhd",
   "tile_index": "wms-grid",
   "authority": "bdtopo",
   "registry_pbf": "france-vosges-2026-09-16.osm.pbf",
   "tile_index_snapshot": "sha256:2a717d675f2607cc"
  },
  "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_E1187-N6187_0m5@21LHDCorseUS-2025-04-02.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1188-N6187_0m5@21LHDCorseUS-2025-04-02.tif"
  ],
  "calculated_at": "2026-09-25T00:41:27+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-co2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-co2",
  "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": [
   "E1187-N6187",
   "E1188-N6187"
  ],
  "elevation_blocks": [
   "21LHDCorseUS@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_1187_6188_MNT_O_0M50_LAMB93_IGN78",
   "LHD_FXX_1188_6188_MNT_O_0M50_LAMB93_IGN78"
  ],
  "ign_missions": [
   "21LHDCorseUS"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1187_6188_MNT_O_0M50_LAMB93_IGN78": "2025-04-02",
   "LHD_FXX_1188_6188_MNT_O_0M50_LAMB93_IGN78": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 15,
   "stations_resolved": 15,
   "width_median_m": 3.75,
   "width_p10_m": 3.35,
   "width_min_m": 1.75,
   "width_max_m": 9.25,
   "bounded_share": 0.6,
   "unbounded_share": 0.4,
   "confidence_median": 0.747,
   "width_median_bounded_m": 3.5,
   "window_m": [
    210.0,
    235.0
   ],
   "width_at_max25_m": 3.62,
   "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": 15,
    "stations_resolved": 15,
    "width_median_m": 4.75,
    "width_p10_m": 3.1,
    "width_min_m": 2.0,
    "width_max_m": 12.0,
    "bounded_share": 0.8,
    "unbounded_share": 0.2,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.5,
    "window_m": [
     210.0,
     235.0
    ],
    "width_at_max25_m": 4.88,
    "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": "Monticello",
  "county": "Haute-Corse",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}