{
 "ocl_version": "0.1.0",
 "name": "Chemin de Costeraste",
 "slug": "chemin-de-costeraste",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.14531024755837,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 39.0,
   "end_distance_m": 41.0,
   "start_elevation_m": 240.04400842453407,
   "end_elevation_m": 240.50691462948524,
   "min_gradient_pct": -13.730477386468465
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.355424954291,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 39.0,
   "end_distance_m": 42.0,
   "start_elevation_m": 240.04400842453407,
   "end_elevation_m": 240.7446711731628,
   "min_gradient_pct": -10.979445792296852
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.78461205495944,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 38.0,
   "end_distance_m": 43.0,
   "start_elevation_m": 239.82906210974076,
   "end_elevation_m": 240.96829271248873,
   "min_gradient_pct": -7.64735329723635
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.738605998374112,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 35.0,
   "end_distance_m": 45.0,
   "start_elevation_m": 239.20824412535967,
   "end_elevation_m": 241.38210472519708,
   "min_gradient_pct": -4.149740274386318
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.34229707030329,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 26.0,
   "end_distance_m": 46.0,
   "start_elevation_m": 237.31041727607646,
   "end_elevation_m": 241.57887669013712,
   "min_gradient_pct": -3.56552577007875
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.22989374655731,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 19.0,
   "end_distance_m": 44.0,
   "start_elevation_m": 235.87354464920844,
   "end_elevation_m": 241.18101808584777,
   "min_gradient_pct": -2.993942151783358
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.401423066859365,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 6.0,
   "end_distance_m": 56.0,
   "start_elevation_m": 233.59990985742294,
   "end_elevation_m": 243.30062139085263,
   "min_gradient_pct": -1.5881500512815592
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.776513771521763,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 8.0,
   "end_distance_m": 108.0,
   "start_elevation_m": 233.88412764276032,
   "end_elevation_m": 250.66064141428208,
   "min_gradient_pct": 0.18227068168016558
  }
 ],
 "shape": {
  "ascent_concentration": 0.396,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 303.0,
  "shape_class": "sustained"
 },
 "length_m": 600.4823572472658,
 "start_elevation_m": 232.85938694388062,
 "end_elevation_m": 293.59177701806425,
 "endpoint_gain_m": 60.73239007418363,
 "overall_gradient_pct": 10.113934129987323,
 "accumulated_ascent_m": 61.6102252941763,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.78461205495944,
   "start_distance_m": 38.0,
   "end_distance_m": 43.0,
   "midpoint_distance_m": 40.5,
   "start_elevation_m": 239.82906210974076,
   "end_elevation_m": 240.96829271248873,
   "start_xy": [
    576324.9296710513,
    6378301.951065691
   ],
   "end_xy": [
    576327.7501540845,
    6378297.822521703
   ]
  },
  "max_10m": {
   "gradient_pct": 21.738605998374112,
   "start_distance_m": 35.0,
   "end_distance_m": 45.0,
   "midpoint_distance_m": 40.0,
   "start_elevation_m": 239.20824412535967,
   "end_elevation_m": 241.38210472519708,
   "start_xy": [
    576323.2373812315,
    6378304.428192085
   ],
   "end_xy": [
    576328.8783472977,
    6378296.171104109
   ]
  },
  "max_20m": {
   "gradient_pct": 21.34229707030329,
   "start_distance_m": 26.0,
   "end_distance_m": 46.0,
   "midpoint_distance_m": 36.0,
   "start_elevation_m": 237.31041727607646,
   "end_elevation_m": 241.57887669013712,
   "start_xy": [
    576318.160511772,
    6378311.859571262
   ],
   "end_xy": [
    576329.4424439044,
    6378295.345395311
   ]
  },
  "max_25m": {
   "gradient_pct": 21.22989374655731,
   "start_distance_m": 19.0,
   "end_distance_m": 44.0,
   "midpoint_distance_m": 31.5,
   "start_elevation_m": 235.87354464920844,
   "end_elevation_m": 241.18101808584777,
   "start_xy": [
    576314.2118355257,
    6378317.6395328455
   ],
   "end_xy": [
    576328.3142506911,
    6378296.996812906
   ]
  },
  "max_50m": {
   "gradient_pct": 19.401423066859365,
   "start_distance_m": 6.0,
   "end_distance_m": 56.0,
   "midpoint_distance_m": 31.0,
   "start_elevation_m": 233.59990985742294,
   "end_elevation_m": 243.30062139085263,
   "start_xy": [
    576306.8785796396,
    6378328.373747215
   ],
   "end_xy": [
    576335.0834099705,
    6378287.088307335
   ]
  },
  "max_100m": {
   "gradient_pct": 16.776513771521763,
   "start_distance_m": 8.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 58.0,
   "start_elevation_m": 233.88412764276032,
   "end_elevation_m": 250.66064141428208,
   "start_xy": [
    576308.0067728529,
    6378326.722329619
   ],
   "end_xy": [
    576361.2990806552,
    6378242.315971686
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.64735329723635,
   "start_distance_m": 591.0,
   "end_distance_m": 596.0,
   "midpoint_distance_m": 593.5,
   "start_elevation_m": 293.90849620736026,
   "end_elevation_m": 293.52612854249844,
   "start_xy": [
    576810.3873909438,
    6378267.110591565
   ],
   "end_xy": [
    576815.1222943133,
    6378265.504138926
   ]
  },
  "min_10m": {
   "gradient_pct": -4.149740274386318,
   "start_distance_m": 586.0,
   "end_distance_m": 596.0,
   "midpoint_distance_m": 591.0,
   "start_elevation_m": 293.9411025699371,
   "end_elevation_m": 293.52612854249844,
   "start_xy": [
    576805.6492498216,
    6378268.70745523
   ],
   "end_xy": [
    576815.1222943133,
    6378265.504138926
   ]
  },
  "min_20m": {
   "gradient_pct": -3.56552577007875,
   "start_distance_m": 576.0,
   "end_distance_m": 596.0,
   "midpoint_distance_m": 586.0,
   "start_elevation_m": 294.2392336965142,
   "end_elevation_m": 293.52612854249844,
   "start_xy": [
    576796.1990269987,
    6378271.975707229
   ],
   "end_xy": [
    576815.1222943133,
    6378265.504138926
   ]
  },
  "min_25m": {
   "gradient_pct": -2.993942151783358,
   "start_distance_m": 571.0,
   "end_distance_m": 596.0,
   "midpoint_distance_m": 583.5,
   "start_elevation_m": 294.2746140804443,
   "end_elevation_m": 293.52612854249844,
   "start_xy": [
    576791.4960420931,
    6378273.6733329175
   ],
   "end_xy": [
    576815.1222943133,
    6378265.504138926
   ]
  },
  "min_50m": {
   "gradient_pct": -1.5881500512815592,
   "start_distance_m": 546.0,
   "end_distance_m": 596.0,
   "midpoint_distance_m": 571.0,
   "start_elevation_m": 294.3202035681392,
   "end_elevation_m": 293.52612854249844,
   "start_xy": [
    576767.981117565,
    6378282.161461359
   ],
   "end_xy": [
    576815.1222943133,
    6378265.504138926
   ]
  },
  "min_100m": {
   "gradient_pct": 0.18227068168016558,
   "start_distance_m": 500.0,
   "end_distance_m": 600.0,
   "midpoint_distance_m": 550.0,
   "start_elevation_m": 293.4021387981293,
   "end_elevation_m": 293.58440947980944,
   "start_xy": [
    576724.4932202725,
    6378297.12775355
   ],
   "end_xy": [
    576818.9102170089,
    6378264.218976815
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.14531024755837,
   "start_distance_m": 39.0,
   "end_distance_m": 41.0,
   "midpoint_distance_m": 40.0,
   "start_elevation_m": 240.04400842453407,
   "end_elevation_m": 240.50691462948524,
   "start_xy": [
    576325.493767658,
    6378301.125356894
   ],
   "end_xy": [
    576326.6219608713,
    6378299.473939299
   ]
  },
  "max_3m": {
   "gradient_pct": 23.355424954291,
   "start_distance_m": 39.0,
   "end_distance_m": 42.0,
   "midpoint_distance_m": 40.5,
   "start_elevation_m": 240.04400842453407,
   "end_elevation_m": 240.7446711731628,
   "start_xy": [
    576325.493767658,
    6378301.125356894
   ],
   "end_xy": [
    576327.1860574778,
    6378298.648230501
   ]
  }
 },
 "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": 0.201,
   "obstruction_max_height_m": 12.52,
   "flagged_windows_m": [
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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-mc1",
   "road_pbf": "block-batch-fr-mc1.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_E576-N6378_0m5@21LHD2IO-2025-04-02.tif"
  ],
  "calculated_at": "2026-09-22T15:15:26+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc1",
  "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": [
   "E576-N6378"
  ],
  "elevation_blocks": [
   "21LHD2IO@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_0576_6379_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD2IO"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0576_6379_MNT_O_0M50_LAMB93_IGN69": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 31,
   "stations_resolved": 31,
   "width_median_m": 7.75,
   "width_p10_m": 3.0,
   "width_min_m": 2.0,
   "width_max_m": 12.0,
   "bounded_share": 0.032,
   "unbounded_share": 0.968,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.75,
   "window_m": [
    19.0,
    44.0
   ],
   "width_at_max25_m": 4.75,
   "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": 31,
    "stations_resolved": 31,
    "width_median_m": 4.75,
    "width_p10_m": 0.75,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.677,
    "unbounded_share": 0.323,
    "confidence_median": 1.0,
    "width_median_bounded_m": 1.5,
    "window_m": [
     19.0,
     44.0
    ],
    "width_at_max25_m": 1.0,
    "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": "Cahors",
  "county": "Lot",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}