{
 "ocl_version": "0.1.0",
 "name": "Chemin des Hautes Bruy\u00e8res",
 "slug": "chemin-des-hautes-bruyeres",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.229082652391526,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1144.0,
   "end_distance_m": 1146.0,
   "start_elevation_m": 306.24190535706305,
   "end_elevation_m": 306.8464870101109,
   "min_gradient_pct": -4.5308323460176325
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.59759819048683,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 635.0,
   "end_distance_m": 638.0,
   "start_elevation_m": 243.57506124461094,
   "end_elevation_m": 244.37298919032554,
   "min_gradient_pct": -3.8330409811351274
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.316073035625664,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 635.0,
   "end_distance_m": 640.0,
   "start_elevation_m": 243.57506124461094,
   "end_elevation_m": 244.84086489639222,
   "min_gradient_pct": -2.659390428821098
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.670752729172136,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 758.0,
   "end_distance_m": 768.0,
   "start_elevation_m": 264.3928574559044,
   "end_elevation_m": 266.8599327288216,
   "min_gradient_pct": -1.6388631498318773
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.095733981202727,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 751.0,
   "end_distance_m": 771.0,
   "start_elevation_m": 262.7801124809658,
   "end_elevation_m": 267.59925927720633,
   "min_gradient_pct": -1.4100996466422089
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.710688839936438,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 751.0,
   "end_distance_m": 776.0,
   "start_elevation_m": 262.7801124809658,
   "end_elevation_m": 268.7077846909499,
   "min_gradient_pct": -1.007355255715538
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.290554585610494,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 748.0,
   "end_distance_m": 798.0,
   "start_elevation_m": 262.2021541958737,
   "end_elevation_m": 272.8474314886789,
   "min_gradient_pct": 0.48573211378516135
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.59163681581913,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 737.0,
   "end_distance_m": 837.0,
   "start_elevation_m": 260.2071222287942,
   "end_elevation_m": 280.79875904461335,
   "min_gradient_pct": 1.3066653565096544
  }
 ],
 "shape": {
  "ascent_concentration": 0.517,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 191.0,
  "shape_class": "stepped"
 },
 "length_m": 1273.000000000416,
 "start_elevation_m": 207.40929156615334,
 "end_elevation_m": 313.6676401398931,
 "endpoint_gain_m": 106.25834857373974,
 "overall_gradient_pct": 8.347081584737236,
 "accumulated_ascent_m": 106.7287840489592,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.316073035625664,
   "start_distance_m": 635.0,
   "end_distance_m": 640.0,
   "midpoint_distance_m": 637.5,
   "start_elevation_m": 243.57506124461094,
   "end_elevation_m": 244.84086489639222,
   "start_xy": [
    830925.9840134264,
    6497144.741176293
   ],
   "end_xy": [
    830929.7869449897,
    6497141.698547519
   ]
  },
  "max_10m": {
   "gradient_pct": 24.670752729172136,
   "start_distance_m": 758.0,
   "end_distance_m": 768.0,
   "midpoint_distance_m": 763.0,
   "start_elevation_m": 264.3928574559044,
   "end_elevation_m": 266.8599327288216,
   "start_xy": [
    830991.9143724311,
    6497043.863272489
   ],
   "end_xy": [
    831001.2099845879,
    6497040.176594495
   ]
  },
  "max_20m": {
   "gradient_pct": 24.095733981202727,
   "start_distance_m": 751.0,
   "end_distance_m": 771.0,
   "midpoint_distance_m": 761.0,
   "start_elevation_m": 262.7801124809658,
   "end_elevation_m": 267.59925927720633,
   "start_xy": [
    830985.6554318828,
    6497046.99266375
   ],
   "end_xy": [
    831003.5608284686,
    6497038.461965947
   ]
  },
  "max_25m": {
   "gradient_pct": 23.710688839936438,
   "start_distance_m": 751.0,
   "end_distance_m": 776.0,
   "midpoint_distance_m": 763.5,
   "start_elevation_m": 262.7801124809658,
   "end_elevation_m": 268.7077846909499,
   "start_xy": [
    830985.6554318828,
    6497046.99266375
   ],
   "end_xy": [
    831006.7862262784,
    6497034.641388901
   ]
  },
  "max_50m": {
   "gradient_pct": 21.290554585610494,
   "start_distance_m": 748.0,
   "end_distance_m": 798.0,
   "midpoint_distance_m": 773.0,
   "start_elevation_m": 262.2021541958737,
   "end_elevation_m": 272.8474314886789,
   "start_xy": [
    830982.9825766383,
    6497048.354957713
   ],
   "end_xy": [
    831020.9779766416,
    6497017.830849896
   ]
  },
  "max_100m": {
   "gradient_pct": 20.59163681581913,
   "start_distance_m": 737.0,
   "end_distance_m": 837.0,
   "midpoint_distance_m": 787.0,
   "start_elevation_m": 260.2071222287942,
   "end_elevation_m": 280.79875904461335,
   "start_xy": [
    830976.5728789085,
    6497056.80542848
   ],
   "end_xy": [
    831047.7146333194,
    6496990.351748471
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.659390428821098,
   "start_distance_m": 926.0,
   "end_distance_m": 931.0,
   "midpoint_distance_m": 928.5,
   "start_elevation_m": 283.18916080980773,
   "end_elevation_m": 283.0561912883667,
   "start_xy": [
    831079.0807357084,
    6497071.477291098
   ],
   "end_xy": [
    831081.6729690132,
    6497075.7528409455
   ]
  },
  "min_10m": {
   "gradient_pct": -1.6388631498318773,
   "start_distance_m": 926.0,
   "end_distance_m": 936.0,
   "midpoint_distance_m": 931.0,
   "start_elevation_m": 283.18916080980773,
   "end_elevation_m": 283.02527449482454,
   "start_xy": [
    831079.0807357084,
    6497071.477291098
   ],
   "end_xy": [
    831084.2652023181,
    6497080.028390792
   ]
  },
  "min_20m": {
   "gradient_pct": -1.4100996466422089,
   "start_distance_m": 913.0,
   "end_distance_m": 933.0,
   "midpoint_distance_m": 923.0,
   "start_elevation_m": 283.29535864932166,
   "end_elevation_m": 283.0133387199932,
   "start_xy": [
    831074.3639562664,
    6497059.416435796
   ],
   "end_xy": [
    831082.7098623351,
    6497077.463060884
   ]
  },
  "min_25m": {
   "gradient_pct": -1.007355255715538,
   "start_distance_m": 912.0,
   "end_distance_m": 937.0,
   "midpoint_distance_m": 924.5,
   "start_elevation_m": 283.28990788451443,
   "end_elevation_m": 283.03806907058555,
   "start_xy": [
    831074.0413307016,
    6497058.469909122
   ],
   "end_xy": [
    831084.783648979,
    6497080.883500761
   ]
  },
  "min_50m": {
   "gradient_pct": 0.48573211378516135,
   "start_distance_m": 886.0,
   "end_distance_m": 936.0,
   "midpoint_distance_m": 911.0,
   "start_elevation_m": 282.78240843793196,
   "end_elevation_m": 283.02527449482454,
   "start_xy": [
    831065.653066015,
    6497033.860215594
   ],
   "end_xy": [
    831084.2652023181,
    6497080.028390792
   ]
  },
  "min_100m": {
   "gradient_pct": 1.3066653565096544,
   "start_distance_m": 262.0,
   "end_distance_m": 362.0,
   "midpoint_distance_m": 312.0,
   "start_elevation_m": 213.4925115771104,
   "end_elevation_m": 214.79917693362006,
   "start_xy": [
    830801.399263542,
    6496957.700953765
   ],
   "end_xy": [
    830773.4455993306,
    6497051.64591006
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.229082652391526,
   "start_distance_m": 1144.0,
   "end_distance_m": 1146.0,
   "midpoint_distance_m": 1145.0,
   "start_elevation_m": 306.24190535706305,
   "end_elevation_m": 306.8464870101109,
   "start_xy": [
    831256.1127669833,
    6497195.522050398
   ],
   "end_xy": [
    831257.8523175017,
    6497196.50894654
   ]
  },
  "max_3m": {
   "gradient_pct": 26.59759819048683,
   "start_distance_m": 635.0,
   "end_distance_m": 638.0,
   "midpoint_distance_m": 636.5,
   "start_elevation_m": 243.57506124461094,
   "end_elevation_m": 244.37298919032554,
   "start_xy": [
    830925.9840134264,
    6497144.741176293
   ],
   "end_xy": [
    830928.6254145843,
    6497143.318854275
   ]
  }
 },
 "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": 0.235,
   "obstruction_max_height_m": 17.07,
   "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": "076a8e7f889cfb3c2cf6b3de65a6030c7155b1f0",
   "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-mc8",
   "road_pbf": "block-batch-fr-mc8.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_E830-N6496_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E830-N6497_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E831-N6496_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E831-N6497_0m5@22LHD4NL-2025-08-06.tif"
  ],
  "calculated_at": "2026-09-22T15:52:48+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc8.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc8",
  "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": [
   "E830-N6496",
   "E830-N6497",
   "E831-N6496",
   "E831-N6497"
  ],
  "elevation_blocks": [
   "22LHD4NL@2025-08-06"
  ],
  "ign_dalles": [
   "LHD_FXX_0830_6497_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0830_6498_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0831_6497_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0831_6498_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD4NL"
  ],
  "ign_editions": [
   "2025-08-06"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0830_6497_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0830_6498_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0831_6497_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0831_6498_MNT_O_0M50_LAMB93_IGN69": "2025-08-06"
  },
  "route_summit_trim_m": 387.8,
  "route_summit_trim_loss_m": 8.8,
  "climb_origin": "discovered",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 57,
   "stations_resolved": 57,
   "width_median_m": 6.25,
   "width_p10_m": 3.5,
   "width_min_m": 2.0,
   "width_max_m": 11.0,
   "bounded_share": 0.386,
   "unbounded_share": 0.614,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.88,
   "window_m": [
    751.0,
    776.0
   ],
   "width_at_max25_m": 6.75,
   "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": 57,
    "stations_resolved": 57,
    "width_median_m": 5.25,
    "width_p10_m": 1.15,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.754,
    "unbounded_share": 0.246,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.25,
    "window_m": [
     751.0,
     776.0
    ],
    "width_at_max25_m": 2.0,
    "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": "Dargoire",
  "county": "Loire",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}