{
 "ocl_version": "0.1.0",
 "name": "Chemin de Saint-Alyre",
 "slug": "chemin-de-saint-alyre",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 46.56239870043919,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1096.0,
   "end_distance_m": 1098.0,
   "start_elevation_m": 478.9060000902507,
   "end_elevation_m": 479.8372480642595,
   "min_gradient_pct": -1.5711494523799274
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 39.23194068848753,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1096.0,
   "end_distance_m": 1099.0,
   "start_elevation_m": 478.9060000902507,
   "end_elevation_m": 480.0829583109053,
   "min_gradient_pct": -1.3730464508209177
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.00897361524676,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1096.0,
   "end_distance_m": 1101.0,
   "start_elevation_m": 478.9060000902507,
   "end_elevation_m": 480.30644877101304,
   "min_gradient_pct": -0.8139582838680326
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.622210218222563,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1079.0,
   "end_distance_m": 1089.0,
   "start_elevation_m": 475.79422316005355,
   "end_elevation_m": 478.0564441818758,
   "min_gradient_pct": 0.16018157522580623
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.556942001294885,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1068.0,
   "end_distance_m": 1088.0,
   "start_elevation_m": 473.5550435618925,
   "end_elevation_m": 477.86643196215147,
   "min_gradient_pct": 2.491461415077083
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.396821857153327,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1074.0,
   "end_distance_m": 1099.0,
   "start_elevation_m": 474.733752846617,
   "end_elevation_m": 480.0829583109053,
   "min_gradient_pct": 3.0761520861440204
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.5301065528389,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1049.0,
   "end_distance_m": 1099.0,
   "start_elevation_m": 470.3179050344859,
   "end_elevation_m": 480.0829583109053,
   "min_gradient_pct": 4.145588897404764
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.70313548413816,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 999.0,
   "end_distance_m": 1099.0,
   "start_elevation_m": 462.37982282676717,
   "end_elevation_m": 480.0829583109053,
   "min_gradient_pct": 5.9004670016980185
  }
 ],
 "shape": {
  "ascent_concentration": 0.367,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 279.0,
  "shape_class": "sustained"
 },
 "length_m": 1125.5169475455662,
 "start_elevation_m": 366.2848287652599,
 "end_elevation_m": 484.1364673198776,
 "endpoint_gain_m": 117.85163855461775,
 "overall_gradient_pct": 10.470889737521839,
 "accumulated_ascent_m": 117.9687979901314,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.00897361524676,
   "start_distance_m": 1096.0,
   "end_distance_m": 1101.0,
   "midpoint_distance_m": 1098.5,
   "start_elevation_m": 478.9060000902507,
   "end_elevation_m": 480.30644877101304,
   "start_xy": [
    712297.1717980498,
    6508532.248444606
   ],
   "end_xy": [
    712299.0524706285,
    6508536.881269949
   ]
  },
  "max_10m": {
   "gradient_pct": 22.622210218222563,
   "start_distance_m": 1079.0,
   "end_distance_m": 1089.0,
   "midpoint_distance_m": 1084.0,
   "start_elevation_m": 475.79422316005355,
   "end_elevation_m": 478.0564441818758,
   "start_xy": [
    712290.777511282,
    6508516.496838442
   ],
   "end_xy": [
    712294.5388564395,
    6508525.762489127
   ]
  },
  "max_20m": {
   "gradient_pct": 21.556942001294885,
   "start_distance_m": 1068.0,
   "end_distance_m": 1088.0,
   "midpoint_distance_m": 1078.0,
   "start_elevation_m": 473.5550435618925,
   "end_elevation_m": 477.86643196215147,
   "start_xy": [
    712286.9956244758,
    6508506.184058893
   ],
   "end_xy": [
    712294.1627219238,
    6508524.835924058
   ]
  },
  "max_25m": {
   "gradient_pct": 21.396821857153327,
   "start_distance_m": 1074.0,
   "end_distance_m": 1099.0,
   "midpoint_distance_m": 1086.5,
   "start_elevation_m": 474.733752846617,
   "end_elevation_m": 480.0829583109053,
   "start_xy": [
    712288.8968387033,
    6508511.8640131
   ],
   "end_xy": [
    712298.300201597,
    6508535.028139811
   ]
  },
  "max_50m": {
   "gradient_pct": 19.5301065528389,
   "start_distance_m": 1049.0,
   "end_distance_m": 1099.0,
   "midpoint_distance_m": 1074.0,
   "start_elevation_m": 470.3179050344859,
   "end_elevation_m": 480.0829583109053,
   "start_xy": [
    712281.9615633059,
    6508487.863081076
   ],
   "end_xy": [
    712298.300201597,
    6508535.028139811
   ]
  },
  "max_100m": {
   "gradient_pct": 17.70313548413816,
   "start_distance_m": 999.0,
   "end_distance_m": 1099.0,
   "midpoint_distance_m": 1049.0,
   "start_elevation_m": 462.37982282676717,
   "end_elevation_m": 480.0829583109053,
   "start_xy": [
    712268.7140339118,
    6508439.64998156
   ],
   "end_xy": [
    712298.300201597,
    6508535.028139811
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.8139582838680326,
   "start_distance_m": 82.0,
   "end_distance_m": 87.0,
   "midpoint_distance_m": 84.5,
   "start_elevation_m": 372.6769152127861,
   "end_elevation_m": 372.6362172985927,
   "start_xy": [
    712278.7312895337,
    6507646.421058038
   ],
   "end_xy": [
    712282.5091876563,
    6507649.696342114
   ]
  },
  "min_10m": {
   "gradient_pct": 0.16018157522580623,
   "start_distance_m": 79.0,
   "end_distance_m": 89.0,
   "midpoint_distance_m": 84.0,
   "start_elevation_m": 372.6406273131745,
   "end_elevation_m": 372.6566454706971,
   "start_xy": [
    712277.3773829562,
    6507643.746649173
   ],
   "end_xy": [
    712284.0024536122,
    6507651.022591531
   ]
  },
  "min_20m": {
   "gradient_pct": 2.491461415077083,
   "start_distance_m": 75.0,
   "end_distance_m": 95.0,
   "midpoint_distance_m": 85.0,
   "start_elevation_m": 372.469402816163,
   "end_elevation_m": 372.9676950991784,
   "start_xy": [
    712275.9082196825,
    6507640.0289634885
   ],
   "end_xy": [
    712287.4448456417,
    6507655.936850083
   ]
  },
  "min_25m": {
   "gradient_pct": 3.0761520861440204,
   "start_distance_m": 560.0,
   "end_distance_m": 585.0,
   "midpoint_distance_m": 572.5,
   "start_elevation_m": 410.2992986598859,
   "end_elevation_m": 411.0683366814219,
   "start_xy": [
    712417.7770621827,
    6508054.4554934185
   ],
   "end_xy": [
    712412.1821949573,
    6508078.7005312955
   ]
  },
  "min_50m": {
   "gradient_pct": 4.145588897404764,
   "start_distance_m": 555.0,
   "end_distance_m": 605.0,
   "midpoint_distance_m": 580.0,
   "start_elevation_m": 410.02067489722475,
   "end_elevation_m": 412.09346934592713,
   "start_xy": [
    712419.538321374,
    6508049.775967154
   ],
   "end_xy": [
    712412.6116163695,
    6508098.695920695
   ]
  },
  "min_100m": {
   "gradient_pct": 5.9004670016980185,
   "start_distance_m": 382.0,
   "end_distance_m": 482.0,
   "midpoint_distance_m": 432.0,
   "start_elevation_m": 396.508958738269,
   "end_elevation_m": 402.409425739967,
   "start_xy": [
    712448.2651378765,
    6507891.813137655
   ],
   "end_xy": [
    712455.9404629624,
    6507986.852620024
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 46.56239870043919,
   "start_distance_m": 1096.0,
   "end_distance_m": 1098.0,
   "midpoint_distance_m": 1097.0,
   "start_elevation_m": 478.9060000902507,
   "end_elevation_m": 479.8372480642595,
   "start_xy": [
    712297.1717980498,
    6508532.248444606
   ],
   "end_xy": [
    712297.9240670813,
    6508534.101574743
   ]
  },
  "max_3m": {
   "gradient_pct": 39.23194068848753,
   "start_distance_m": 1096.0,
   "end_distance_m": 1099.0,
   "midpoint_distance_m": 1097.5,
   "start_elevation_m": 478.9060000902507,
   "end_elevation_m": 480.0829583109053,
   "start_xy": [
    712297.1717980498,
    6508532.248444606
   ],
   "end_xy": [
    712298.300201597,
    6508535.028139811
   ]
  }
 },
 "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": 0.058,
   "obstruction_max_height_m": 13.66,
   "flagged_windows_m": [
    2
   ]
  },
  "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-mc5",
   "road_pbf": "block-batch-fr-mc5.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_E712-N6507_0m5@22LHD4LL-2025-07-24.tif",
   "data/cache/fr/ign-lidarhd_dtm_E712-N6508_0m5@22LHD4LL-2025-07-24.tif"
  ],
  "calculated_at": "2026-09-22T17:11:02+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc5.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc5",
  "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": [
   "E712-N6507",
   "E712-N6508"
  ],
  "elevation_blocks": [
   "22LHD4LL@2025-07-24"
  ],
  "ign_dalles": [
   "LHD_FXX_0712_6508_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0712_6509_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD4LL"
  ],
  "ign_editions": [
   "2025-07-24"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0712_6508_MNT_O_0M50_LAMB93_IGN69": "2025-07-24",
   "LHD_FXX_0712_6509_MNT_O_0M50_LAMB93_IGN69": "2025-07-24"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 5,
  "carriageway": {
   "stations": 52,
   "stations_resolved": 52,
   "width_median_m": 7.75,
   "width_p10_m": 4.1,
   "width_min_m": 2.5,
   "width_max_m": 12.0,
   "bounded_share": 0.212,
   "unbounded_share": 0.788,
   "confidence_median": 0.0,
   "width_median_bounded_m": 6.25,
   "window_m": [
    1074.0,
    1099.0
   ],
   "width_at_max25_m": 3.5,
   "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": 52,
    "stations_resolved": 52,
    "width_median_m": 7.75,
    "width_p10_m": 2.78,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.654,
    "unbounded_share": 0.346,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.0,
    "window_m": [
     1074.0,
     1099.0
    ],
    "width_at_max25_m": 3.5,
    "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": "Veyre-Monton",
  "county": "Puy-de-D\u00f4me",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}