{
 "ocl_version": "0.1.0",
 "name": "Chemin de Rocantin",
 "slug": "chemin-de-rocantin",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 36.164366873576625,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 97.0,
   "end_distance_m": 99.0,
   "start_elevation_m": 250.53739174584717,
   "end_elevation_m": 251.2606790833187,
   "min_gradient_pct": -32.94269826642733
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 34.48907620593692,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 97.0,
   "end_distance_m": 100.0,
   "start_elevation_m": 250.53739174584717,
   "end_elevation_m": 251.57206403202528,
   "min_gradient_pct": -27.810558949122804
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.064009007736217,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 96.0,
   "end_distance_m": 101.0,
   "start_elevation_m": 250.305732088008,
   "end_elevation_m": 251.8589325383948,
   "min_gradient_pct": -20.37332687529556
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.355565895467635,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 200.0,
   "end_distance_m": 210.0,
   "start_elevation_m": 267.81615742790626,
   "end_elevation_m": 270.251714017453,
   "min_gradient_pct": -11.295296471566871
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.926658140426582,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 194.0,
   "end_distance_m": 214.0,
   "start_elevation_m": 266.55362975928125,
   "end_elevation_m": 271.33896138736657,
   "min_gradient_pct": -2.563223317420409
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.07030677262219,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 189.0,
   "end_distance_m": 214.0,
   "start_elevation_m": 265.571384694211,
   "end_elevation_m": 271.33896138736657,
   "min_gradient_pct": -2.1207098191041496
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.06846523299282,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 187.0,
   "end_distance_m": 237.0,
   "start_elevation_m": 265.2555202193372,
   "end_elevation_m": 275.2897528358336,
   "min_gradient_pct": -0.19544358568168718
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.774301642470107,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 175.0,
   "end_distance_m": 275.0,
   "start_elevation_m": 263.28558617109155,
   "end_elevation_m": 282.05988781356166,
   "min_gradient_pct": 3.4781527635428233
  }
 ],
 "shape": {
  "ascent_concentration": 0.346,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 284.0,
  "shape_class": "sustained"
 },
 "length_m": 863.969469001154,
 "start_elevation_m": 242.6467397546607,
 "end_elevation_m": 347.1461954040521,
 "endpoint_gain_m": 104.4994556493914,
 "overall_gradient_pct": 12.095271812116755,
 "accumulated_ascent_m": 109.471581764827,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.064009007736217,
   "start_distance_m": 96.0,
   "end_distance_m": 101.0,
   "midpoint_distance_m": 98.5,
   "start_elevation_m": 250.305732088008,
   "end_elevation_m": 251.8589325383948,
   "start_xy": [
    623729.1268876973,
    6389477.047281156
   ],
   "end_xy": [
    623726.4974568416,
    6389472.794506371
   ]
  },
  "max_10m": {
   "gradient_pct": 24.355565895467635,
   "start_distance_m": 200.0,
   "end_distance_m": 210.0,
   "midpoint_distance_m": 205.0,
   "start_elevation_m": 267.81615742790626,
   "end_elevation_m": 270.251714017453,
   "start_xy": [
    623677.2748156606,
    6389386.972024204
   ],
   "end_xy": [
    623672.0972201695,
    6389378.416762377
   ]
  },
  "max_20m": {
   "gradient_pct": 23.926658140426582,
   "start_distance_m": 194.0,
   "end_distance_m": 214.0,
   "midpoint_distance_m": 204.0,
   "start_elevation_m": 266.55362975928125,
   "end_elevation_m": 271.33896138736657,
   "start_xy": [
    623680.3813729552,
    6389392.105181301
   ],
   "end_xy": [
    623670.026181973,
    6389374.994657647
   ]
  },
  "max_25m": {
   "gradient_pct": 23.07030677262219,
   "start_distance_m": 189.0,
   "end_distance_m": 214.0,
   "midpoint_distance_m": 201.5,
   "start_elevation_m": 265.571384694211,
   "end_elevation_m": 271.33896138736657,
   "start_xy": [
    623682.9701707006,
    6389396.382812214
   ],
   "end_xy": [
    623670.026181973,
    6389374.994657647
   ]
  },
  "max_50m": {
   "gradient_pct": 20.06846523299282,
   "start_distance_m": 187.0,
   "end_distance_m": 237.0,
   "midpoint_distance_m": 212.0,
   "start_elevation_m": 265.2555202193372,
   "end_elevation_m": 275.2897528358336,
   "start_xy": [
    623684.0056897989,
    6389398.09386458
   ],
   "end_xy": [
    623656.1595639847,
    6389356.651672574
   ]
  },
  "max_100m": {
   "gradient_pct": 18.774301642470107,
   "start_distance_m": 175.0,
   "end_distance_m": 275.0,
   "midpoint_distance_m": 225.0,
   "start_elevation_m": 263.28558617109155,
   "end_elevation_m": 282.05988781356166,
   "start_xy": [
    623690.2188043881,
    6389408.360178772
   ],
   "end_xy": [
    623633.1043968223,
    6389326.444731863
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -20.37332687529556,
   "start_distance_m": 584.0,
   "end_distance_m": 589.0,
   "midpoint_distance_m": 586.5,
   "start_elevation_m": 309.4243691308159,
   "end_elevation_m": 308.4057027870511,
   "start_xy": [
    623925.3361177015,
    6389357.204875523
   ],
   "end_xy": [
    623929.9786999702,
    6389359.061331792
   ]
  },
  "min_10m": {
   "gradient_pct": -11.295296471566871,
   "start_distance_m": 579.0,
   "end_distance_m": 589.0,
   "midpoint_distance_m": 584.0,
   "start_elevation_m": 309.5352324342078,
   "end_elevation_m": 308.4057027870511,
   "start_xy": [
    623920.6935354328,
    6389355.348419255
   ],
   "end_xy": [
    623929.9786999702,
    6389359.061331792
   ]
  },
  "min_20m": {
   "gradient_pct": -2.563223317420409,
   "start_distance_m": 570.0,
   "end_distance_m": 590.0,
   "midpoint_distance_m": 580.0,
   "start_elevation_m": 308.9067748650333,
   "end_elevation_m": 308.3941302015492,
   "start_xy": [
    623912.3368873491,
    6389352.00679797
   ],
   "end_xy": [
    623930.9072164239,
    6389359.4326230455
   ]
  },
  "min_25m": {
   "gradient_pct": -2.1207098191041496,
   "start_distance_m": 564.0,
   "end_distance_m": 589.0,
   "midpoint_distance_m": 576.5,
   "start_elevation_m": 308.93588024182714,
   "end_elevation_m": 308.4057027870511,
   "start_xy": [
    623906.7657886266,
    6389349.779050448
   ],
   "end_xy": [
    623929.9786999702,
    6389359.061331792
   ]
  },
  "min_50m": {
   "gradient_pct": -0.19544358568168718,
   "start_distance_m": 540.0,
   "end_distance_m": 590.0,
   "midpoint_distance_m": 565.0,
   "start_elevation_m": 308.49185199439006,
   "end_elevation_m": 308.3941302015492,
   "start_xy": [
    623883.6766478076,
    6389343.334490401
   ],
   "end_xy": [
    623930.9072164239,
    6389359.4326230455
   ]
  },
  "min_100m": {
   "gradient_pct": 3.4781527635428233,
   "start_distance_m": 490.0,
   "end_distance_m": 590.0,
   "midpoint_distance_m": 540.0,
   "start_elevation_m": 304.9159774380064,
   "end_elevation_m": 308.3941302015492,
   "start_xy": [
    623835.1702905083,
    6389332.214745521
   ],
   "end_xy": [
    623930.9072164239,
    6389359.4326230455
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 36.164366873576625,
   "start_distance_m": 97.0,
   "end_distance_m": 99.0,
   "midpoint_distance_m": 98.0,
   "start_elevation_m": 250.53739174584717,
   "end_elevation_m": 251.2606790833187,
   "start_xy": [
    623728.6010015262,
    6389476.196726199
   ],
   "end_xy": [
    623727.5492291839,
    6389474.495616285
   ]
  },
  "max_3m": {
   "gradient_pct": 34.48907620593692,
   "start_distance_m": 97.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 98.5,
   "start_elevation_m": 250.53739174584717,
   "end_elevation_m": 251.57206403202528,
   "start_xy": [
    623728.6010015262,
    6389476.196726199
   ],
   "end_xy": [
    623727.0233430128,
    6389473.645061328
   ]
  }
 },
 "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": 0.2,
   "obstruction_max_height_m": 17.36,
   "flagged_windows_m": [
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "1cc9fdcd6556a02163cb21acb2293cad3067d2a1",
   "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-mc2",
   "road_pbf": "block-batch-fr-mc2.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:af4eae1f5df9e232"
  },
  "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_E623-N6389_0m5@22LHD3JN-2025-05-16.tif",
   "data/cache/fr/ign-lidarhd_dtm_E624-N6389_0m5@22LHD3JN-2025-05-16.tif"
  ],
  "calculated_at": "2026-09-22T16:09:44+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc2",
  "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": [
   "E623-N6389",
   "E624-N6389"
  ],
  "elevation_blocks": [
   "22LHD3JN@2025-05-16"
  ],
  "ign_dalles": [
   "LHD_FXX_0623_6390_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0624_6390_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD3JN"
  ],
  "ign_editions": [
   "2025-05-16"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0623_6390_MNT_O_0M50_LAMB93_IGN69": "2025-05-16",
   "LHD_FXX_0624_6390_MNT_O_0M50_LAMB93_IGN69": "2025-05-16"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 6,
  "carriageway": {
   "stations": 41,
   "stations_resolved": 41,
   "width_median_m": 4.25,
   "width_p10_m": 2.0,
   "width_min_m": 1.25,
   "width_max_m": 12.0,
   "bounded_share": 0.488,
   "unbounded_share": 0.512,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.0,
   "window_m": [
    189.0,
    214.0
   ],
   "width_at_max25_m": 2.5,
   "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": 41,
    "stations_resolved": 41,
    "width_median_m": 4.75,
    "width_p10_m": 1.25,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.805,
    "unbounded_share": 0.195,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.5,
    "window_m": [
     189.0,
     214.0
    ],
    "width_at_max25_m": 1.75,
    "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": "Figeac",
  "county": "Lot",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}