{
 "ocl_version": "0.1.0",
 "name": "Chemin des Blanchets Hauts",
 "slug": "chemin-des-blanchets-hauts",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.37676756054867,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 323.0,
   "end_distance_m": 325.0,
   "start_elevation_m": 140.50990157164546,
   "end_elevation_m": 140.95743692285643,
   "min_gradient_pct": -4.5351566123244424
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.376513247198204,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 322.0,
   "end_distance_m": 325.0,
   "start_elevation_m": 140.28614152544048,
   "end_elevation_m": 140.95743692285643,
   "min_gradient_pct": -3.8665501618055487
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.060692100431538,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 322.0,
   "end_distance_m": 327.0,
   "start_elevation_m": 140.28614152544048,
   "end_elevation_m": 141.38917613046206,
   "min_gradient_pct": -3.7300201299592572
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.127157163686547,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 322.0,
   "end_distance_m": 332.0,
   "start_elevation_m": 140.28614152544048,
   "end_elevation_m": 142.39885724180914,
   "min_gradient_pct": -3.22360249391636
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.564440316077395,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 317.0,
   "end_distance_m": 337.0,
   "start_elevation_m": 139.2966338886743,
   "end_elevation_m": 143.4095219518898,
   "min_gradient_pct": -3.084769836635388
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.26253930778057,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 317.0,
   "end_distance_m": 342.0,
   "start_elevation_m": 139.2966338886743,
   "end_elevation_m": 144.36226871561945,
   "min_gradient_pct": -3.068280739874808
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.958159332733487,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 305.0,
   "end_distance_m": 355.0,
   "start_elevation_m": 137.233571515949,
   "end_elevation_m": 146.21265118231574,
   "min_gradient_pct": -2.9885824769274905
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.9210389024758,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 264.0,
   "end_distance_m": 364.0,
   "start_elevation_m": 133.25305950498415,
   "end_elevation_m": 147.17409840745995,
   "min_gradient_pct": -2.598653649586794
  }
 ],
 "shape": {
  "ascent_concentration": 0.689,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 67.0,
  "shape_class": "stepped"
 },
 "length_m": 832.3811923450193,
 "start_elevation_m": 119.63619459105921,
 "end_elevation_m": 149.38036785791442,
 "endpoint_gain_m": 29.744173266855213,
 "overall_gradient_pct": 3.5733836300479926,
 "accumulated_ascent_m": 33.2755323503756,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.060692100431538,
   "start_distance_m": 322.0,
   "end_distance_m": 327.0,
   "midpoint_distance_m": 324.5,
   "start_elevation_m": 140.28614152544048,
   "end_elevation_m": 141.38917613046206,
   "start_xy": [
    554502.7977051319,
    6307597.007589823
   ],
   "end_xy": [
    554504.2110325518,
    6307592.21149708
   ]
  },
  "max_10m": {
   "gradient_pct": 21.127157163686547,
   "start_distance_m": 322.0,
   "end_distance_m": 332.0,
   "midpoint_distance_m": 327.0,
   "start_elevation_m": 140.28614152544048,
   "end_elevation_m": 142.39885724180914,
   "start_xy": [
    554502.7977051319,
    6307597.007589823
   ],
   "end_xy": [
    554506.7403731972,
    6307588.007515697
   ]
  },
  "max_20m": {
   "gradient_pct": 20.564440316077395,
   "start_distance_m": 317.0,
   "end_distance_m": 337.0,
   "midpoint_distance_m": 327.0,
   "start_elevation_m": 139.2966338886743,
   "end_elevation_m": 143.4095219518898,
   "start_xy": [
    554502.8589046164,
    6307602.002623291
   ],
   "end_xy": [
    554509.9192734461,
    6307584.1481643
   ]
  },
  "max_25m": {
   "gradient_pct": 20.26253930778057,
   "start_distance_m": 317.0,
   "end_distance_m": 342.0,
   "midpoint_distance_m": 329.5,
   "start_elevation_m": 139.2966338886743,
   "end_elevation_m": 144.36226871561945,
   "start_xy": [
    554502.8589046164,
    6307602.002623291
   ],
   "end_xy": [
    554513.0981736949,
    6307580.288812903
   ]
  },
  "max_50m": {
   "gradient_pct": 17.958159332733487,
   "start_distance_m": 305.0,
   "end_distance_m": 355.0,
   "midpoint_distance_m": 330.0,
   "start_elevation_m": 137.233571515949,
   "end_elevation_m": 146.21265118231574,
   "start_xy": [
    554503.3172028876,
    6307613.989964094
   ],
   "end_xy": [
    554521.363314342,
    6307570.25449927
   ]
  },
  "max_100m": {
   "gradient_pct": 13.9210389024758,
   "start_distance_m": 264.0,
   "end_distance_m": 364.0,
   "midpoint_distance_m": 314.0,
   "start_elevation_m": 133.25305950498415,
   "end_elevation_m": 147.17409840745995,
   "start_xy": [
    554531.7786894398,
    6307643.077843539
   ],
   "end_xy": [
    554526.0378260845,
    6307562.688270512
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.7300201299592572,
   "start_distance_m": 593.0,
   "end_distance_m": 598.0,
   "midpoint_distance_m": 595.5,
   "start_elevation_m": 147.25888919880595,
   "end_elevation_m": 147.07238819230798,
   "start_xy": [
    554387.9956138342,
    6307413.4868147755
   ],
   "end_xy": [
    554383.5184673913,
    6307411.260795969
   ]
  },
  "min_10m": {
   "gradient_pct": -3.22360249391636,
   "start_distance_m": 545.0,
   "end_distance_m": 555.0,
   "midpoint_distance_m": 550.0,
   "start_elevation_m": 148.6624773050232,
   "end_elevation_m": 148.34011705563157,
   "start_xy": [
    554430.9762196867,
    6307434.856595321
   ],
   "end_xy": [
    554422.0219268007,
    6307430.404557707
   ]
  },
  "min_20m": {
   "gradient_pct": -3.084769836635388,
   "start_distance_m": 549.0,
   "end_distance_m": 569.0,
   "midpoint_distance_m": 559.0,
   "start_elevation_m": 148.54750776423896,
   "end_elevation_m": 147.93055379691188,
   "start_xy": [
    554427.3945025323,
    6307433.075780275
   ],
   "end_xy": [
    554409.4859167605,
    6307424.171705048
   ]
  },
  "min_25m": {
   "gradient_pct": -3.068280739874808,
   "start_distance_m": 541.0,
   "end_distance_m": 566.0,
   "midpoint_distance_m": 553.5,
   "start_elevation_m": 148.7816933943323,
   "end_elevation_m": 148.0146232093636,
   "start_xy": [
    554434.557936841,
    6307436.637410366
   ],
   "end_xy": [
    554412.1722046263,
    6307425.507316331
   ]
  },
  "min_50m": {
   "gradient_pct": -2.9885824769274905,
   "start_distance_m": 545.0,
   "end_distance_m": 595.0,
   "midpoint_distance_m": 570.0,
   "start_elevation_m": 148.6624773050232,
   "end_elevation_m": 147.16818606655946,
   "start_xy": [
    554430.9762196867,
    6307434.856595321
   ],
   "end_xy": [
    554386.204755257,
    6307412.596407252
   ]
  },
  "min_100m": {
   "gradient_pct": -2.598653649586794,
   "start_distance_m": 518.0,
   "end_distance_m": 618.0,
   "midpoint_distance_m": 568.0,
   "start_elevation_m": 149.25171295629852,
   "end_elevation_m": 146.65305930671173,
   "start_xy": [
    554455.1528104787,
    6307446.877096877
   ],
   "end_xy": [
    554365.9655138059,
    6307401.7359123705
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.37676756054867,
   "start_distance_m": 323.0,
   "end_distance_m": 325.0,
   "midpoint_distance_m": 324.0,
   "start_elevation_m": 140.50990157164546,
   "end_elevation_m": 140.95743692285643,
   "start_xy": [
    554503.0803706158,
    6307596.048371274
   ],
   "end_xy": [
    554503.6457015838,
    6307594.129934177
   ]
  },
  "max_3m": {
   "gradient_pct": 22.376513247198204,
   "start_distance_m": 322.0,
   "end_distance_m": 325.0,
   "midpoint_distance_m": 323.5,
   "start_elevation_m": 140.28614152544048,
   "end_elevation_m": 140.95743692285643,
   "start_xy": [
    554502.7977051319,
    6307597.007589823
   ],
   "end_xy": [
    554503.6457015838,
    6307594.129934177
   ]
  }
 },
 "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": 0.047,
   "obstruction_max_height_m": 11.76,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "06fa4c370391597f015858e97dcf01ca2f5b3640",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:0048c2bbb24ab95e",
   "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-pyr3",
   "road_pbf": "block-batch-fr-pyr3.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": "sha256:79dd257545ed11dc"
  },
  "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_E554-N6307_0m5@21LHD2IP-2025-04-10.tif"
  ],
  "calculated_at": "2026-09-20T08:01:03+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pyr3",
  "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": [
   "E554-N6307"
  ],
  "elevation_blocks": [
   "21LHD2IP@2025-04-10"
  ],
  "ign_dalles": [
   "LHD_FXX_0554_6308_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD2IP"
  ],
  "ign_editions": [
   "2025-04-10"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0554_6308_MNT_O_0M50_LAMB93_IGN69": "2025-04-10"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 40,
   "stations_resolved": 40,
   "width_median_m": 7.5,
   "width_p10_m": 5.0,
   "width_min_m": 4.0,
   "width_max_m": 12.0,
   "bounded_share": 0.025,
   "unbounded_share": 0.975,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.75,
   "window_m": [
    317.0,
    342.0
   ],
   "width_at_max25_m": 6.5,
   "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": 40,
    "stations_resolved": 40,
    "width_median_m": 10.75,
    "width_p10_m": 1.25,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.325,
    "unbounded_share": 0.675,
    "confidence_median": 0.0,
    "width_median_bounded_m": 2.25,
    "window_m": [
     317.0,
     342.0
    ],
    "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": "Saven\u00e8s",
  "county": "Tarn-et-Garonne",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}