{
 "ocl_version": "0.1.0",
 "name": "Chemin de Veyrac",
 "slug": "chemin-de-veyrac",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.71318266384401,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 625.0,
   "end_distance_m": 627.0,
   "start_elevation_m": 174.40643148346345,
   "end_elevation_m": 175.30069513674033,
   "min_gradient_pct": -48.125894126111746,
   "suppressed_max_gradient_pct": 70.09583016883028,
   "suppressed_location_m": [
    137.0,
    139.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 40.361925753478545,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 624.0,
   "end_distance_m": 627.0,
   "start_elevation_m": 174.08983736413597,
   "end_elevation_m": 175.30069513674033,
   "min_gradient_pct": -45.04735754714394,
   "suppressed_max_gradient_pct": 61.458174512684614,
   "suppressed_location_m": [
    136.0,
    139.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 33.558214679990215,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 622.0,
   "end_distance_m": 627.0,
   "start_elevation_m": 173.62278440274082,
   "end_elevation_m": 175.30069513674033,
   "min_gradient_pct": -32.13244791242005,
   "suppressed_max_gradient_pct": 46.798772162360365,
   "suppressed_location_m": [
    136.0,
    141.0
   ],
   "suppressed_min_gradient_pct": -38.56597353578309,
   "suppressed_min_location_m": [
    130.0,
    135.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.668354077467995,
   "diagnostic": false,
   "flags": [
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 617.0,
   "end_distance_m": 627.0,
   "start_elevation_m": 172.33385972899353,
   "end_elevation_m": 175.30069513674033,
   "min_gradient_pct": -15.933383402361017,
   "suppressed_min_gradient_pct": -19.308887849177268,
   "suppressed_min_location_m": [
    126.0,
    136.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.946307354061332,
   "diagnostic": false,
   "flags": [
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 607.0,
   "end_distance_m": 627.0,
   "start_elevation_m": 170.31143366592806,
   "end_elevation_m": 175.30069513674033,
   "min_gradient_pct": -8.119662701770665,
   "suppressed_min_gradient_pct": -8.875929275779697,
   "suppressed_min_location_m": [
    116.0,
    136.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.887463849405435,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 602.0,
   "end_distance_m": 627.0,
   "start_elevation_m": 169.32882917438897,
   "end_elevation_m": 175.30069513674033,
   "min_gradient_pct": -6.708436197478704,
   "suppressed_max_gradient_pct": 25.177559017926683,
   "suppressed_location_m": [
    621.0,
    646.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.92677378098705,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 588.0,
   "end_distance_m": 638.0,
   "start_elevation_m": 166.86863216122498,
   "end_elevation_m": 177.3320190517185,
   "min_gradient_pct": -2.909997256316501,
   "suppressed_max_gradient_pct": 22.77066191709855,
   "suppressed_location_m": [
    596.0,
    646.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.525967878695752,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 542.0,
   "end_distance_m": 642.0,
   "start_elevation_m": 161.4079826575074,
   "end_elevation_m": 177.93395053620316,
   "min_gradient_pct": -0.09584060483996382,
   "suppressed_max_gradient_pct": 19.20223970500814,
   "suppressed_location_m": [
    572.0,
    672.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.449,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 173.0,
  "shape_class": "sustained"
 },
 "length_m": 1113.026135743739,
 "start_elevation_m": 134.95591066162083,
 "end_elevation_m": 213.49996363780895,
 "endpoint_gain_m": 78.54405297618811,
 "overall_gradient_pct": 7.056802212798348,
 "accumulated_ascent_m": 87.8597622162113,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 33.558214679990215,
   "start_distance_m": 622.0,
   "end_distance_m": 627.0,
   "midpoint_distance_m": 624.5,
   "start_elevation_m": 173.62278440274082,
   "end_elevation_m": 175.30069513674033,
   "start_xy": [
    778680.7565256787,
    6327040.498576938
   ],
   "end_xy": [
    778679.6721198903,
    6327035.617586865
   ]
  },
  "max_10m": {
   "gradient_pct": 29.668354077467995,
   "start_distance_m": 617.0,
   "end_distance_m": 627.0,
   "midpoint_distance_m": 622.0,
   "start_elevation_m": 172.33385972899353,
   "end_elevation_m": 175.30069513674033,
   "start_xy": [
    778681.8409314669,
    6327045.37956701
   ],
   "end_xy": [
    778679.6721198903,
    6327035.617586865
   ]
  },
  "max_20m": {
   "gradient_pct": 24.946307354061332,
   "start_distance_m": 607.0,
   "end_distance_m": 627.0,
   "midpoint_distance_m": 617.0,
   "start_elevation_m": 170.31143366592806,
   "end_elevation_m": 175.30069513674033,
   "start_xy": [
    778684.0097430435,
    6327055.141547155
   ],
   "end_xy": [
    778679.6721198903,
    6327035.617586865
   ]
  },
  "max_25m": {
   "gradient_pct": 23.887463849405435,
   "start_distance_m": 602.0,
   "end_distance_m": 627.0,
   "midpoint_distance_m": 614.5,
   "start_elevation_m": 169.32882917438897,
   "end_elevation_m": 175.30069513674033,
   "start_xy": [
    778685.0941488317,
    6327060.022537227
   ],
   "end_xy": [
    778679.6721198903,
    6327035.617586865
   ]
  },
  "max_50m": {
   "gradient_pct": 20.92677378098705,
   "start_distance_m": 588.0,
   "end_distance_m": 638.0,
   "midpoint_distance_m": 613.0,
   "start_elevation_m": 166.86863216122498,
   "end_elevation_m": 177.3320190517185,
   "start_xy": [
    778688.1304850389,
    6327073.689309429
   ],
   "end_xy": [
    778684.5369228612,
    6327025.802949648
   ]
  },
  "max_100m": {
   "gradient_pct": 16.525967878695752,
   "start_distance_m": 542.0,
   "end_distance_m": 642.0,
   "midpoint_distance_m": 592.0,
   "start_elevation_m": 161.4079826575074,
   "end_elevation_m": 177.93395053620316,
   "start_xy": [
    778707.5960674908,
    6327114.787007162
   ],
   "end_xy": [
    778686.3556198551,
    6327022.240318423
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -32.13244791242005,
   "start_distance_m": 129.0,
   "end_distance_m": 134.0,
   "midpoint_distance_m": 131.5,
   "start_elevation_m": 138.9317383224335,
   "end_elevation_m": 137.3251159268125,
   "start_xy": [
    778796.783440796,
    6327430.224481358
   ],
   "end_xy": [
    778791.783642756,
    6327430.179541841
   ]
  },
  "min_10m": {
   "gradient_pct": -15.933383402361017,
   "start_distance_m": 124.0,
   "end_distance_m": 134.0,
   "midpoint_distance_m": 129.0,
   "start_elevation_m": 138.9184542670486,
   "end_elevation_m": 137.3251159268125,
   "start_xy": [
    778801.7832388359,
    6327430.269420876
   ],
   "end_xy": [
    778791.783642756,
    6327430.179541841
   ]
  },
  "min_20m": {
   "gradient_pct": -8.119662701770665,
   "start_distance_m": 864.0,
   "end_distance_m": 884.0,
   "midpoint_distance_m": 874.0,
   "start_elevation_m": 199.31136673531876,
   "end_elevation_m": 197.68743419496462,
   "start_xy": [
    778558.7745399901,
    6326872.768200684
   ],
   "end_xy": [
    778560.5285743484,
    6326852.860259101
   ]
  },
  "min_25m": {
   "gradient_pct": -6.708436197478704,
   "start_distance_m": 864.0,
   "end_distance_m": 889.0,
   "midpoint_distance_m": 876.5,
   "start_elevation_m": 199.31136673531876,
   "end_elevation_m": 197.63425768594908,
   "start_xy": [
    778558.7745399901,
    6326872.768200684
   ],
   "end_xy": [
    778561.0812667735,
    6326847.890899879
   ]
  },
  "min_50m": {
   "gradient_pct": -2.909997256316501,
   "start_distance_m": 842.0,
   "end_distance_m": 892.0,
   "midpoint_distance_m": 867.0,
   "start_elevation_m": 199.0793620241115,
   "end_elevation_m": 197.62436339595325,
   "start_xy": [
    778558.277070387,
    6326894.762575511
   ],
   "end_xy": [
    778560.7737767439,
    6326845.005456831
   ]
  },
  "min_100m": {
   "gradient_pct": -0.09584060483996382,
   "start_distance_m": 820.0,
   "end_distance_m": 920.0,
   "midpoint_distance_m": 870.0,
   "start_elevation_m": 198.8831800358981,
   "end_elevation_m": 198.78733943105814,
   "start_xy": [
    778562.4387463214,
    6326916.058861437
   ],
   "end_xy": [
    778549.6259877092,
    6326819.32030938
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.71318266384401,
   "start_distance_m": 625.0,
   "end_distance_m": 627.0,
   "midpoint_distance_m": 626.0,
   "start_elevation_m": 174.40643148346345,
   "end_elevation_m": 175.30069513674033,
   "start_xy": [
    778680.1058822057,
    6327037.569982895
   ],
   "end_xy": [
    778679.6721198903,
    6327035.617586865
   ]
  },
  "max_3m": {
   "gradient_pct": 40.361925753478545,
   "start_distance_m": 624.0,
   "end_distance_m": 627.0,
   "midpoint_distance_m": 625.5,
   "start_elevation_m": 174.08983736413597,
   "end_elevation_m": 175.30069513674033,
   "start_xy": [
    778680.3227633634,
    6327038.546180909
   ],
   "end_xy": [
    778679.6721198903,
    6327035.617586865
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.012,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    5.0,
    10.0,
    20.0
   ],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.461,
   "obstruction_max_height_m": 23.49,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    135.0,
    141.0
   ],
   [
    643.0,
    648.0
   ]
  ],
  "review": [],
  "extent": [
   "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-mc6",
   "road_pbf": "block-batch-fr-mc6.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_E778-N6326_0m5@21LHD4MP-2024-12-13.tif",
   "data/cache/fr/ign-lidarhd_dtm_E778-N6327_0m5@21LHD4MP-2024-12-13.tif"
  ],
  "calculated_at": "2026-09-22T17:02:14+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc6.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc6",
  "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": [
   "E778-N6326",
   "E778-N6327"
  ],
  "elevation_blocks": [
   "21LHD4MP@2024-12-13"
  ],
  "ign_dalles": [
   "LHD_FXX_0778_6327_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0778_6328_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD4MP"
  ],
  "ign_editions": [
   "2024-12-13"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0778_6327_MNT_O_0M50_LAMB93_IGN69": "2024-12-13",
   "LHD_FXX_0778_6328_MNT_O_0M50_LAMB93_IGN69": "2024-12-13"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 51,
   "stations_resolved": 51,
   "width_median_m": 3.75,
   "width_p10_m": 2.25,
   "width_min_m": 1.0,
   "width_max_m": 12.0,
   "bounded_share": 0.353,
   "unbounded_share": 0.647,
   "confidence_median": 0.0,
   "width_median_bounded_m": 2.75,
   "window_m": [
    602.0,
    627.0
   ],
   "width_at_max25_m": 4.0,
   "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": 51,
    "stations_resolved": 51,
    "width_median_m": 2.5,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.922,
    "unbounded_share": 0.078,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.5,
    "window_m": [
     602.0,
     627.0
    ],
    "width_at_max25_m": 2.75,
    "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": "Anduze",
  "county": "Gard",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}