{
 "ocl_version": "0.1.0",
 "name": "Chemin de Cadillac",
 "slug": "chemin-de-cadillac",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.03576220329893,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 169.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 169.86505947696224,
   "end_elevation_m": 170.40577472102822,
   "min_gradient_pct": -1.3169835575666866
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.12576646279005,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 168.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 169.62200172714452,
   "end_elevation_m": 170.40577472102822,
   "min_gradient_pct": -1.1169378475794172
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.779601752375356,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 166.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 169.11679463340946,
   "end_elevation_m": 170.40577472102822,
   "min_gradient_pct": -0.6170003336120544
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.2607808294772,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 94.0,
   "end_distance_m": 104.0,
   "start_elevation_m": 154.62945189301303,
   "end_elevation_m": 157.15552997596075,
   "min_gradient_pct": -0.30748628388465704
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.691909260906186,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 86.0,
   "end_distance_m": 106.0,
   "start_elevation_m": 152.6628191839177,
   "end_elevation_m": 157.60120103609893,
   "min_gradient_pct": 0.29443468070113
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.390811523515936,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 86.0,
   "end_distance_m": 111.0,
   "start_elevation_m": 152.6628191839177,
   "end_elevation_m": 158.76052206479667,
   "min_gradient_pct": 0.6845687008197956
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.86853617286152,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 68.0,
   "end_distance_m": 118.0,
   "start_elevation_m": 148.77451273642444,
   "end_elevation_m": 160.2087808228552,
   "min_gradient_pct": 2.5172304457039445
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.100877880158237,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 78.0,
   "end_distance_m": 178.0,
   "start_elevation_m": 150.85462763156403,
   "end_elevation_m": 171.95550551172227,
   "min_gradient_pct": 7.55220615758725
  }
 ],
 "shape": {
  "ascent_concentration": 0.399,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 182.0,
  "shape_class": "sustained"
 },
 "length_m": 278.862082077819,
 "start_elevation_m": 142.35109574048712,
 "end_elevation_m": 179.53289953614495,
 "endpoint_gain_m": 37.18180379565783,
 "overall_gradient_pct": 13.333402490081784,
 "accumulated_ascent_m": 37.23486901211359,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.779601752375356,
   "start_distance_m": 166.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 168.5,
   "start_elevation_m": 169.11679463340946,
   "end_elevation_m": 170.40577472102822,
   "start_xy": [
    499709.7752396762,
    6361101.236272038
   ],
   "end_xy": [
    499710.7822472207,
    6361096.52005079
   ]
  },
  "max_10m": {
   "gradient_pct": 25.2607808294772,
   "start_distance_m": 94.0,
   "end_distance_m": 104.0,
   "midpoint_distance_m": 99.0,
   "start_elevation_m": 154.62945189301303,
   "end_elevation_m": 157.15552997596075,
   "start_xy": [
    499706.4117667107,
    6361167.746155024
   ],
   "end_xy": [
    499705.33044724114,
    6361157.804789513
   ]
  },
  "max_20m": {
   "gradient_pct": 24.691909260906186,
   "start_distance_m": 86.0,
   "end_distance_m": 106.0,
   "midpoint_distance_m": 96.0,
   "start_elevation_m": 152.6628191839177,
   "end_elevation_m": 157.60120103609893,
   "start_xy": [
    499707.27682228637,
    6361175.699247432
   ],
   "end_xy": [
    499705.1141833472,
    6361155.8165164115
   ]
  },
  "max_25m": {
   "gradient_pct": 24.390811523515936,
   "start_distance_m": 86.0,
   "end_distance_m": 111.0,
   "midpoint_distance_m": 98.5,
   "start_elevation_m": 152.6628191839177,
   "end_elevation_m": 158.76052206479667,
   "start_xy": [
    499707.27682228637,
    6361175.699247432
   ],
   "end_xy": [
    499704.5302718917,
    6361150.852100709
   ]
  },
  "max_50m": {
   "gradient_pct": 22.86853617286152,
   "start_distance_m": 68.0,
   "end_distance_m": 118.0,
   "midpoint_distance_m": 93.0,
   "start_elevation_m": 148.77451273642444,
   "end_elevation_m": 160.2087808228552,
   "start_xy": [
    499709.2330138167,
    6361193.592629117
   ],
   "end_xy": [
    499703.2808688943,
    6361143.96450373
   ]
  },
  "max_100m": {
   "gradient_pct": 21.100877880158237,
   "start_distance_m": 78.0,
   "end_distance_m": 178.0,
   "midpoint_distance_m": 128.0,
   "start_elevation_m": 150.85462763156403,
   "end_elevation_m": 171.95550551172227,
   "start_xy": [
    499708.14187786204,
    6361183.652339839
   ],
   "end_xy": [
    499708.1961156564,
    6361090.041315643
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.6170003336120544,
   "start_distance_m": 270.0,
   "end_distance_m": 275.0,
   "midpoint_distance_m": 272.5,
   "start_elevation_m": 179.51495903891225,
   "end_elevation_m": 179.48410902223165,
   "start_xy": [
    499675.088967841,
    6361005.423292547
   ],
   "end_xy": [
    499673.31489299977,
    6361000.757039415
   ]
  },
  "min_10m": {
   "gradient_pct": -0.30748628388465704,
   "start_distance_m": 265.0,
   "end_distance_m": 275.0,
   "midpoint_distance_m": 270.0,
   "start_elevation_m": 179.51485765062012,
   "end_elevation_m": 179.48410902223165,
   "start_xy": [
    499677.3071190224,
    6361009.904342127
   ],
   "end_xy": [
    499673.31489299977,
    6361000.757039415
   ]
  },
  "min_20m": {
   "gradient_pct": 0.29443468070113,
   "start_distance_m": 258.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 268.0,
   "start_elevation_m": 179.4488247331693,
   "end_elevation_m": 179.50771166930951,
   "start_xy": [
    499680.41253067646,
    6361016.177811539
   ],
   "end_xy": [
    499672.51818645484,
    6360997.8660144955
   ]
  },
  "min_25m": {
   "gradient_pct": 0.6845687008197956,
   "start_distance_m": 253.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 265.5,
   "start_elevation_m": 179.33656949410457,
   "end_elevation_m": 179.50771166930951,
   "start_xy": [
    499682.63068185793,
    6361020.658861118
   ],
   "end_xy": [
    499672.51818645484,
    6360997.8660144955
   ]
  },
  "min_50m": {
   "gradient_pct": 2.5172304457039445,
   "start_distance_m": 228.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 253.0,
   "start_elevation_m": 178.24909644645754,
   "end_elevation_m": 179.50771166930951,
   "start_xy": [
    499691.0598246224,
    6361044.16285633
   ],
   "end_xy": [
    499672.51818645484,
    6360997.8660144955
   ]
  },
  "min_100m": {
   "gradient_pct": 7.55220615758725,
   "start_distance_m": 178.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 228.0,
   "start_elevation_m": 171.95550551172227,
   "end_elevation_m": 179.50771166930951,
   "start_xy": [
    499708.1961156564,
    6361090.041315643
   ],
   "end_xy": [
    499672.51818645484,
    6360997.8660144955
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.03576220329893,
   "start_distance_m": 169.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 170.0,
   "start_elevation_m": 169.86505947696224,
   "end_elevation_m": 170.40577472102822,
   "start_xy": [
    499710.73894385516,
    6361098.4195990395
   ],
   "end_xy": [
    499710.7822472207,
    6361096.52005079
   ]
  },
  "max_3m": {
   "gradient_pct": 26.12576646279005,
   "start_distance_m": 168.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 169.5,
   "start_elevation_m": 169.62200172714452,
   "end_elevation_m": 170.40577472102822,
   "start_xy": [
    499710.4596495165,
    6361099.379804576
   ],
   "end_xy": [
    499710.7822472207,
    6361096.52005079
   ]
  }
 },
 "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": 0.329,
   "obstruction_max_height_m": 20.09,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    100
   ]
  },
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "16bcc1553fe58b280e0c4a66a3ab0980530490a6",
   "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-so4",
   "road_pbf": "block-batch-fr-so4.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": "sha256:18f786cf9fa98070"
  },
  "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_E499-N6360_0m5@21LHD2HO-2025-02-20.tif",
   "data/cache/fr/ign-lidarhd_dtm_E499-N6361_0m5@21LHD2HO-2025-02-20.tif"
  ],
  "calculated_at": "2026-09-27T03:58:03+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-so4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-so4",
  "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": [
   "E499-N6360",
   "E499-N6361"
  ],
  "elevation_blocks": [
   "21LHD2HO@2025-02-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0499_6361_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0499_6362_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD2HO"
  ],
  "ign_editions": [
   "2025-02-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0499_6361_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0499_6362_MNT_O_0M50_LAMB93_IGN69": "2025-02-20"
  },
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked",
  "carriageway": {
   "stations": 18,
   "stations_resolved": 18,
   "width_median_m": 4.12,
   "width_p10_m": 2.67,
   "width_min_m": 2.25,
   "width_max_m": 11.5,
   "bounded_share": 0.278,
   "unbounded_share": 0.722,
   "confidence_median": 0.0,
   "width_median_bounded_m": 2.75,
   "window_m": [
    86.0,
    111.0
   ],
   "width_at_max25_m": 3.75,
   "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": 18,
    "stations_resolved": 18,
    "width_median_m": 2.62,
    "width_p10_m": 1.28,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.722,
    "unbounded_share": 0.278,
    "confidence_median": 1.0,
    "width_median_bounded_m": 1.75,
    "window_m": [
     86.0,
     111.0
    ],
    "width_at_max25_m": 7.25,
    "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": "Saint-Sardos",
  "county": "Lot-et-Garonne",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}