{
 "ocl_version": "0.1.0",
 "name": "Chemin de l'Alouette",
 "slug": "chemin-de-l-alouette",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.21612045741722,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 524.0,
   "end_distance_m": 526.0,
   "start_elevation_m": 276.51353206445185,
   "end_elevation_m": 277.1578544736002,
   "min_gradient_pct": -6.570237801579992,
   "suppressed_max_gradient_pct": 69.44352381307226,
   "suppressed_location_m": [
    575.0,
    577.0
   ],
   "suppressed_min_gradient_pct": -35.85999388797063,
   "suppressed_min_location_m": [
    573.0,
    575.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.46702277470293,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 523.0,
   "end_distance_m": 526.0,
   "start_elevation_m": 276.2438437903591,
   "end_elevation_m": 277.1578544736002,
   "min_gradient_pct": -5.8580389496777725,
   "suppressed_max_gradient_pct": 57.832268539461516,
   "suppressed_location_m": [
    575.0,
    578.0
   ],
   "suppressed_min_gradient_pct": -20.79459124952905,
   "suppressed_min_location_m": [
    572.0,
    575.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.068492267213742,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 522.0,
   "end_distance_m": 527.0,
   "start_elevation_m": 276.0333203563661,
   "end_elevation_m": 277.3867449697268,
   "min_gradient_pct": -4.791249924547856,
   "suppressed_max_gradient_pct": 40.18821475695631,
   "suppressed_location_m": [
    575.0,
    580.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.528982748256908,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 516.0,
   "end_distance_m": 526.0,
   "start_elevation_m": 274.8049561987745,
   "end_elevation_m": 277.1578544736002,
   "min_gradient_pct": -2.882182581190591,
   "suppressed_max_gradient_pct": 29.477475654604177,
   "suppressed_location_m": [
    575.0,
    585.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.605567940311175,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 507.0,
   "end_distance_m": 527.0,
   "start_elevation_m": 272.86563138166457,
   "end_elevation_m": 277.3867449697268,
   "min_gradient_pct": -2.0689594559706848,
   "suppressed_max_gradient_pct": 24.243591344046536,
   "suppressed_location_m": [
    575.0,
    595.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.747552718359202,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 502.0,
   "end_distance_m": 527.0,
   "start_elevation_m": 271.949856790137,
   "end_elevation_m": 277.3867449697268,
   "min_gradient_pct": -2.031244837621216,
   "suppressed_max_gradient_pct": 23.57370894848259,
   "suppressed_location_m": [
    575.0,
    600.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.918695319453946,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 483.0,
   "end_distance_m": 533.0,
   "start_elevation_m": 268.95268948709554,
   "end_elevation_m": 278.4120371468225,
   "min_gradient_pct": -1.3907201440034669,
   "suppressed_max_gradient_pct": 20.603070173931428,
   "suppressed_location_m": [
    575.0,
    625.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.881703691169662,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 472.0,
   "end_distance_m": 572.0,
   "start_elevation_m": 267.4731578181053,
   "end_elevation_m": 284.35486150927494,
   "min_gradient_pct": -0.5857580251122272,
   "suppressed_max_gradient_pct": 18.211575602153573,
   "suppressed_location_m": [
    509.0,
    609.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.392,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 153.0,
  "shape_class": "sustained"
 },
 "length_m": 2323.286055499553,
 "start_elevation_m": 226.55639939453744,
 "end_elevation_m": 399.51147821607924,
 "endpoint_gain_m": 172.9550788215418,
 "overall_gradient_pct": 7.444415999146217,
 "accumulated_ascent_m": 176.21943078739895,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.068492267213742,
   "start_distance_m": 522.0,
   "end_distance_m": 527.0,
   "midpoint_distance_m": 524.5,
   "start_elevation_m": 276.0333203563661,
   "end_elevation_m": 277.3867449697268,
   "start_xy": [
    870101.5448476246,
    6322552.659035129
   ],
   "end_xy": [
    870101.7306709762,
    6322547.662489353
   ]
  },
  "max_10m": {
   "gradient_pct": 23.528982748256908,
   "start_distance_m": 516.0,
   "end_distance_m": 526.0,
   "midpoint_distance_m": 521.0,
   "start_elevation_m": 274.8049561987745,
   "end_elevation_m": 277.1578544736002,
   "start_xy": [
    870101.3218596028,
    6322558.654890059
   ],
   "end_xy": [
    870101.6935063059,
    6322548.661798508
   ]
  },
  "max_20m": {
   "gradient_pct": 22.605567940311175,
   "start_distance_m": 507.0,
   "end_distance_m": 527.0,
   "midpoint_distance_m": 517.0,
   "start_elevation_m": 272.86563138166457,
   "end_elevation_m": 277.3867449697268,
   "start_xy": [
    870100.8833195291,
    6322567.644163353
   ],
   "end_xy": [
    870101.7306709762,
    6322547.662489353
   ]
  },
  "max_25m": {
   "gradient_pct": 21.747552718359202,
   "start_distance_m": 502.0,
   "end_distance_m": 527.0,
   "midpoint_distance_m": 514.5,
   "start_elevation_m": 271.949856790137,
   "end_elevation_m": 277.3867449697268,
   "start_xy": [
    870100.6362317931,
    6322572.638054387
   ],
   "end_xy": [
    870101.7306709762,
    6322547.662489353
   ]
  },
  "max_50m": {
   "gradient_pct": 18.918695319453946,
   "start_distance_m": 483.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 508.0,
   "start_elevation_m": 268.95268948709554,
   "end_elevation_m": 278.4120371468225,
   "start_xy": [
    870099.6890948197,
    6322591.614406912
   ],
   "end_xy": [
    870102.706510786,
    6322541.800546444
   ]
  },
  "max_100m": {
   "gradient_pct": 16.881703691169662,
   "start_distance_m": 472.0,
   "end_distance_m": 572.0,
   "midpoint_distance_m": 522.0,
   "start_elevation_m": 267.4731578181053,
   "end_elevation_m": 284.35486150927494,
   "start_xy": [
    870099.0720374001,
    6322602.597086009
   ],
   "end_xy": [
    870117.0073469117,
    6322505.621812857
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.791249924547856,
   "start_distance_m": 2016.0,
   "end_distance_m": 2021.0,
   "midpoint_distance_m": 2018.5,
   "start_elevation_m": 386.2158514903868,
   "end_elevation_m": 385.9762889941594,
   "start_xy": [
    870739.3939111466,
    6321282.060863233
   ],
   "end_xy": [
    870743.7791901751,
    6321279.663307902
   ]
  },
  "min_10m": {
   "gradient_pct": -2.882182581190591,
   "start_distance_m": 2013.0,
   "end_distance_m": 2023.0,
   "midpoint_distance_m": 2018.0,
   "start_elevation_m": 386.2542467234235,
   "end_elevation_m": 385.9660284653044,
   "start_xy": [
    870736.7707379756,
    6321283.516528893
   ],
   "end_xy": [
    870745.6463282958,
    6321278.946512787
   ]
  },
  "min_20m": {
   "gradient_pct": -2.0689594559706848,
   "start_distance_m": 1782.0,
   "end_distance_m": 1802.0,
   "midpoint_distance_m": 1792.0,
   "start_elevation_m": 384.8086126781669,
   "end_elevation_m": 384.3948207869728,
   "start_xy": [
    870572.1750394551,
    6321443.703969009
   ],
   "end_xy": [
    870583.285629021,
    6321427.076413902
   ]
  },
  "min_25m": {
   "gradient_pct": -2.031244837621216,
   "start_distance_m": 1782.0,
   "end_distance_m": 1807.0,
   "midpoint_distance_m": 1794.5,
   "start_elevation_m": 384.8086126781669,
   "end_elevation_m": 384.3008014687616,
   "start_xy": [
    870572.1750394551,
    6321443.703969009
   ],
   "end_xy": [
    870586.3817706602,
    6321423.1579440255
   ]
  },
  "min_50m": {
   "gradient_pct": -1.3907201440034669,
   "start_distance_m": 1782.0,
   "end_distance_m": 1832.0,
   "midpoint_distance_m": 1807.0,
   "start_elevation_m": 384.8086126781669,
   "end_elevation_m": 384.1132526061652,
   "start_xy": [
    870572.1750394551,
    6321443.703969009
   ],
   "end_xy": [
    870603.4676532134,
    6321404.9894139245
   ]
  },
  "min_100m": {
   "gradient_pct": -0.5857580251122272,
   "start_distance_m": 1775.0,
   "end_distance_m": 1875.0,
   "midpoint_distance_m": 1825.0,
   "start_elevation_m": 384.8073368438028,
   "end_elevation_m": 384.22157881869055,
   "start_xy": [
    870568.488905672,
    6321449.654802374
   ],
   "end_xy": [
    870637.1660482008,
    6321378.388239513
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.21612045741722,
   "start_distance_m": 524.0,
   "end_distance_m": 526.0,
   "midpoint_distance_m": 525.0,
   "start_elevation_m": 276.51353206445185,
   "end_elevation_m": 277.1578544736002,
   "start_xy": [
    870101.6191769653,
    6322550.660416818
   ],
   "end_xy": [
    870101.6935063059,
    6322548.661798508
   ]
  },
  "max_3m": {
   "gradient_pct": 30.46702277470293,
   "start_distance_m": 523.0,
   "end_distance_m": 526.0,
   "midpoint_distance_m": 524.5,
   "start_elevation_m": 276.2438437903591,
   "end_elevation_m": 277.1578544736002,
   "start_xy": [
    870101.582012295,
    6322551.659725973
   ],
   "end_xy": [
    870101.6935063059,
    6322548.661798508
   ]
  }
 },
 "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": 0.003,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    2.0,
    3.0
   ],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.229,
   "obstruction_max_height_m": 14.68,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    573.0,
    579.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "41205ec4649bb0a4093af76ff34281a5d9a13832",
   "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-pr1",
   "road_pbf": "block-batch-fr-pr1.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:ba95a0bf562c86eb"
  },
  "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_E869-N6322_0m5@21LHD7OP-2025-03-14.tif",
   "data/cache/fr/ign-lidarhd_dtm_E870-N6321_0m5@21LHD7OP-2025-03-14.tif",
   "data/cache/fr/ign-lidarhd_dtm_E870-N6322_0m5@21LHD7OP-2025-03-14.tif"
  ],
  "calculated_at": "2026-09-25T10:38:34+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pr1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pr1",
  "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": [
   "E869-N6322",
   "E870-N6321",
   "E870-N6322"
  ],
  "elevation_blocks": [
   "21LHD7OP@2025-03-14"
  ],
  "ign_dalles": [
   "LHD_FXX_0869_6323_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0870_6322_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0870_6323_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD7OP"
  ],
  "ign_editions": [
   "2025-03-14"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0869_6323_MNT_O_0M50_LAMB93_IGN69": "2025-03-14",
   "LHD_FXX_0870_6322_MNT_O_0M50_LAMB93_IGN69": "2025-03-14",
   "LHD_FXX_0870_6323_MNT_O_0M50_LAMB93_IGN69": "2025-03-14"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 10,
  "carriageway": {
   "stations": 99,
   "stations_resolved": 99,
   "width_median_m": 3.75,
   "width_p10_m": 2.75,
   "width_min_m": 1.25,
   "width_max_m": 12.0,
   "bounded_share": 0.556,
   "unbounded_share": 0.444,
   "confidence_median": 0.553,
   "width_median_bounded_m": 3.75,
   "window_m": [
    502.0,
    527.0
   ],
   "width_at_max25_m": 2.5,
   "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": 99,
    "stations_resolved": 99,
    "width_median_m": 3.0,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 10.75,
    "bounded_share": 0.869,
    "unbounded_share": 0.131,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.62,
    "window_m": [
     502.0,
     527.0
    ],
    "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": "Le Beaucet",
  "county": "Vaucluse",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}