{
 "ocl_version": "0.1.0",
 "name": "Impasse du Castanet",
 "slug": "impasse-du-castanet",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 35.882739408873476,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 52.0,
   "end_distance_m": 54.0,
   "start_elevation_m": 264.72141882907283,
   "end_elevation_m": 265.4390736172503,
   "min_gradient_pct": -1.948298919444369
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.648601291070083,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 372.0,
   "end_distance_m": 375.0,
   "start_elevation_m": 308.2166100387059,
   "end_elevation_m": 309.136068077438,
   "min_gradient_pct": -0.7048018673401657
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 30.043595509265515,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 371.0,
   "end_distance_m": 376.0,
   "start_elevation_m": 307.9291455656412,
   "end_elevation_m": 309.43132534110447,
   "min_gradient_pct": -0.030010597904492897
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.91585462173225,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 371.0,
   "end_distance_m": 381.0,
   "start_elevation_m": 307.9291455656412,
   "end_elevation_m": 310.8207310278144,
   "min_gradient_pct": 0.4737620681004273
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 27.93817801191267,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 366.0,
   "end_distance_m": 386.0,
   "start_elevation_m": 306.6161248433674,
   "end_elevation_m": 312.20376044574994,
   "min_gradient_pct": 0.856780796220562
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 26.98646636272224,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 361.0,
   "end_distance_m": 386.0,
   "start_elevation_m": 305.4571438550694,
   "end_elevation_m": 312.20376044574994,
   "min_gradient_pct": 0.8740958908722405
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.854919019153954,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 347.0,
   "end_distance_m": 397.0,
   "start_elevation_m": 302.9838391927056,
   "end_elevation_m": 314.4112987022826,
   "min_gradient_pct": 1.2006691780190977
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.925896802708902,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 297.0,
   "end_distance_m": 397.0,
   "start_elevation_m": 292.4854018995737,
   "end_elevation_m": 314.4112987022826,
   "min_gradient_pct": 3.664324252757069
  }
 ],
 "shape": {
  "ascent_concentration": 0.422,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 213.0,
  "shape_class": "sustained"
 },
 "length_m": 397.4361339615439,
 "start_elevation_m": 262.5067927702662,
 "end_elevation_m": 314.51936580329846,
 "endpoint_gain_m": 52.012573033032254,
 "overall_gradient_pct": 13.087026716615814,
 "accumulated_ascent_m": 52.12000832481641,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 30.043595509265515,
   "start_distance_m": 371.0,
   "end_distance_m": 376.0,
   "midpoint_distance_m": 373.5,
   "start_elevation_m": 307.9291455656412,
   "end_elevation_m": 309.43132534110447,
   "start_xy": [
    791850.2421765822,
    6363682.073068604
   ],
   "end_xy": [
    791848.8455777129,
    6363677.315253652
   ]
  },
  "max_10m": {
   "gradient_pct": 28.91585462173225,
   "start_distance_m": 371.0,
   "end_distance_m": 381.0,
   "midpoint_distance_m": 376.0,
   "start_elevation_m": 307.9291455656412,
   "end_elevation_m": 310.8207310278144,
   "start_xy": [
    791850.2421765822,
    6363682.073068604
   ],
   "end_xy": [
    791847.8657365651,
    6363672.412410998
   ]
  },
  "max_20m": {
   "gradient_pct": 27.93817801191267,
   "start_distance_m": 366.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 376.0,
   "start_elevation_m": 306.6161248433674,
   "end_elevation_m": 312.20376044574994,
   "start_xy": [
    791852.4593919925,
    6363686.554581275
   ],
   "end_xy": [
    791846.8296849689,
    6363667.520928903
   ]
  },
  "max_25m": {
   "gradient_pct": 26.98646636272224,
   "start_distance_m": 361.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 373.5,
   "start_elevation_m": 305.4571438550694,
   "end_elevation_m": 312.20376044574994,
   "start_xy": [
    791855.0321316946,
    6363690.789311443
   ],
   "end_xy": [
    791846.8296849689,
    6363667.520928903
   ]
  },
  "max_50m": {
   "gradient_pct": 22.854919019153954,
   "start_distance_m": 347.0,
   "end_distance_m": 397.0,
   "midpoint_distance_m": 372.0,
   "start_elevation_m": 302.9838391927056,
   "end_elevation_m": 314.4112987022826,
   "start_xy": [
    791865.063276752,
    6363700.535452879
   ],
   "end_xy": [
    791844.5503714574,
    6363656.7596682925
   ]
  },
  "max_100m": {
   "gradient_pct": 21.925896802708902,
   "start_distance_m": 297.0,
   "end_distance_m": 397.0,
   "midpoint_distance_m": 347.0,
   "start_elevation_m": 292.4854018995737,
   "end_elevation_m": 314.4112987022826,
   "start_xy": [
    791909.1235673968,
    6363723.287148947
   ],
   "end_xy": [
    791844.5503714574,
    6363656.7596682925
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.030010597904492897,
   "start_distance_m": 1.0,
   "end_distance_m": 6.0,
   "midpoint_distance_m": 3.5,
   "start_elevation_m": 262.5246146926349,
   "end_elevation_m": 262.52311416273966,
   "start_xy": [
    792061.5704699071,
    6363903.021434331
   ],
   "end_xy": [
    792061.0390864202,
    6363898.106752783
   ]
  },
  "min_10m": {
   "gradient_pct": 0.4737620681004273,
   "start_distance_m": 95.0,
   "end_distance_m": 105.0,
   "midpoint_distance_m": 100.0,
   "start_elevation_m": 269.75593365817224,
   "end_elevation_m": 269.8033098649823,
   "start_xy": [
    792009.104881998,
    6363859.932205996
   ],
   "end_xy": [
    791999.3179259923,
    6363861.985372365
   ]
  },
  "min_20m": {
   "gradient_pct": 0.856780796220562,
   "start_distance_m": 95.0,
   "end_distance_m": 115.0,
   "midpoint_distance_m": 105.0,
   "start_elevation_m": 269.75593365817224,
   "end_elevation_m": 269.92728981741635,
   "start_xy": [
    792009.104881998,
    6363859.932205996
   ],
   "end_xy": [
    791989.4370465489,
    6363862.735968221
   ]
  },
  "min_25m": {
   "gradient_pct": 0.8740958908722405,
   "start_distance_m": 95.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 107.5,
   "start_elevation_m": 269.75593365817224,
   "end_elevation_m": 269.9744576308903,
   "start_xy": [
    792009.104881998,
    6363859.932205996
   ],
   "end_xy": [
    791984.5429727372,
    6363862.039555388
   ]
  },
  "min_50m": {
   "gradient_pct": 1.2006691780190977,
   "start_distance_m": 92.0,
   "end_distance_m": 142.0,
   "midpoint_distance_m": 117.0,
   "start_elevation_m": 269.69318000603715,
   "end_elevation_m": 270.2935145950467,
   "start_xy": [
    792012.0409687998,
    6363859.316256085
   ],
   "end_xy": [
    791965.4607463604,
    6363851.169651603
   ]
  },
  "min_100m": {
   "gradient_pct": 3.664324252757069,
   "start_distance_m": 84.0,
   "end_distance_m": 184.0,
   "midpoint_distance_m": 134.0,
   "start_elevation_m": 269.2563561676879,
   "end_elevation_m": 272.92068042044497,
   "start_xy": [
    792019.8705336044,
    6363857.67372299
   ],
   "end_xy": [
    791930.8821752243,
    6363827.356418735
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 35.882739408873476,
   "start_distance_m": 52.0,
   "end_distance_m": 54.0,
   "midpoint_distance_m": 53.0,
   "start_elevation_m": 264.72141882907283,
   "end_elevation_m": 265.4390736172503,
   "start_xy": [
    792051.7844302165,
    6363856.590755121
   ],
   "end_xy": [
    792049.7850195,
    6363856.542208375
   ]
  },
  "max_3m": {
   "gradient_pct": 30.648601291070083,
   "start_distance_m": 372.0,
   "end_distance_m": 375.0,
   "midpoint_distance_m": 373.5,
   "start_elevation_m": 308.2166100387059,
   "end_elevation_m": 309.136068077438,
   "start_xy": [
    791849.7987335002,
    6363681.17676607
   ],
   "end_xy": [
    791849.0345544679,
    6363678.297235213
   ]
  }
 },
 "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": 0.055,
   "obstruction_max_height_m": 17.27,
   "flagged_windows_m": [
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "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-mc7",
   "road_pbf": "block-batch-fr-mc7.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_E791-N6363_0m5@22LHD5NO-2025-04-22.tif",
   "data/cache/fr/ign-lidarhd_dtm_E792-N6363_0m5@22LHD5NO-2025-04-22.tif"
  ],
  "calculated_at": "2026-09-22T13:57:44+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc7.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc7",
  "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": [
   "E791-N6363",
   "E792-N6363"
  ],
  "elevation_blocks": [
   "22LHD5NO@2025-04-22"
  ],
  "ign_dalles": [
   "LHD_FXX_0791_6364_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0792_6364_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD5NO"
  ],
  "ign_editions": [
   "2025-04-22"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0791_6364_MNT_O_0M50_LAMB93_IGN69": "2025-04-22",
   "LHD_FXX_0792_6364_MNT_O_0M50_LAMB93_IGN69": "2025-04-22"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 3,
  "carriageway": {
   "stations": 22,
   "stations_resolved": 22,
   "width_median_m": 4.62,
   "width_p10_m": 2.5,
   "width_min_m": 2.25,
   "width_max_m": 9.0,
   "bounded_share": 0.364,
   "unbounded_share": 0.636,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.75,
   "window_m": [
    361.0,
    386.0
   ],
   "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": 22,
    "stations_resolved": 22,
    "width_median_m": 4.75,
    "width_p10_m": 1.5,
    "width_min_m": 0.5,
    "width_max_m": 11.0,
    "bounded_share": 0.909,
    "unbounded_share": 0.091,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.75,
    "window_m": [
     361.0,
     386.0
    ],
    "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": "Banne",
  "county": "Ard\u00e8che",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}