{
 "ocl_version": "0.1.0",
 "name": "Chemin de la Source",
 "slug": "chemin-de-la-source-5",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 42.05742007505151,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 813.0,
   "end_distance_m": 815.0,
   "start_elevation_m": 64.24835946024531,
   "end_elevation_m": 65.08950786174634,
   "min_gradient_pct": -17.61972297602199
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.842566056502335,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 813.0,
   "end_distance_m": 816.0,
   "start_elevation_m": 64.24835946024531,
   "end_elevation_m": 65.35363644194038,
   "min_gradient_pct": -13.999191666357072
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.829535693178855,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 813.0,
   "end_distance_m": 818.0,
   "start_elevation_m": 64.24835946024531,
   "end_elevation_m": 65.98983624490425,
   "min_gradient_pct": -12.5824228989228
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.880484025784813,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 795.0,
   "end_distance_m": 805.0,
   "start_elevation_m": 60.472010513439514,
   "end_elevation_m": 63.160058916017995,
   "min_gradient_pct": -10.880057801429501
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.935068521022842,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 798.0,
   "end_distance_m": 818.0,
   "start_elevation_m": 61.202822540699685,
   "end_elevation_m": 65.98983624490425,
   "min_gradient_pct": -9.127172621679378
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.59674923835948,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 793.0,
   "end_distance_m": 818.0,
   "start_elevation_m": 60.090648935314384,
   "end_elevation_m": 65.98983624490425,
   "min_gradient_pct": -8.467176229659344
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.928110487228764,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 787.0,
   "end_distance_m": 837.0,
   "start_elevation_m": 59.1731144471604,
   "end_elevation_m": 68.63716969077478,
   "min_gradient_pct": -6.918173900391209
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.77521974853228,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 787.0,
   "end_distance_m": 887.0,
   "start_elevation_m": 59.1731144471604,
   "end_elevation_m": 74.94833419569268,
   "min_gradient_pct": -6.452142424359607
  }
 ],
 "shape": {
  "ascent_concentration": 0.592,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 124.0,
  "shape_class": "stepped"
 },
 "length_m": 1670.4758249482038,
 "start_elevation_m": 57.637501487272715,
 "end_elevation_m": 119.38046912603808,
 "endpoint_gain_m": 61.742967638765364,
 "overall_gradient_pct": 3.6961305705025587,
 "accumulated_ascent_m": 82.75389853457139,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.829535693178855,
   "start_distance_m": 813.0,
   "end_distance_m": 818.0,
   "midpoint_distance_m": 815.5,
   "start_elevation_m": 64.24835946024531,
   "end_elevation_m": 65.98983624490425,
   "start_xy": [
    494760.062164052,
    6411846.181021726
   ],
   "end_xy": [
    494762.83443671325,
    6411850.342091816
   ]
  },
  "max_10m": {
   "gradient_pct": 26.880484025784813,
   "start_distance_m": 795.0,
   "end_distance_m": 805.0,
   "midpoint_distance_m": 800.0,
   "start_elevation_m": 60.472010513439514,
   "end_elevation_m": 63.160058916017995,
   "start_xy": [
    494762.37154461246,
    6411828.46182437
   ],
   "end_xy": [
    494760.8862837798,
    6411838.350909275
   ]
  },
  "max_20m": {
   "gradient_pct": 23.935068521022842,
   "start_distance_m": 798.0,
   "end_distance_m": 818.0,
   "midpoint_distance_m": 808.0,
   "start_elevation_m": 61.202822540699685,
   "end_elevation_m": 65.98983624490425,
   "start_xy": [
    494761.92596636264,
    6411831.428549841
   ],
   "end_xy": [
    494762.83443671325,
    6411850.342091816
   ]
  },
  "max_25m": {
   "gradient_pct": 23.59674923835948,
   "start_distance_m": 793.0,
   "end_distance_m": 818.0,
   "midpoint_distance_m": 805.5,
   "start_elevation_m": 60.090648935314384,
   "end_elevation_m": 65.98983624490425,
   "start_xy": [
    494762.668596779,
    6411826.484007388
   ],
   "end_xy": [
    494762.83443671325,
    6411850.342091816
   ]
  },
  "max_50m": {
   "gradient_pct": 18.928110487228764,
   "start_distance_m": 787.0,
   "end_distance_m": 837.0,
   "midpoint_distance_m": 812.0,
   "start_elevation_m": 59.1731144471604,
   "end_elevation_m": 68.63716969077478,
   "start_xy": [
    494765.0694705358,
    6411821.069620167
   ],
   "end_xy": [
    494774.3428760072,
    6411865.383586794
   ]
  },
  "max_100m": {
   "gradient_pct": 15.77521974853228,
   "start_distance_m": 787.0,
   "end_distance_m": 887.0,
   "midpoint_distance_m": 837.0,
   "start_elevation_m": 59.1731144471604,
   "end_elevation_m": 74.94833419569268,
   "start_xy": [
    494765.0694705358,
    6411821.069620167
   ],
   "end_xy": [
    494803.52872391127,
    6411905.437948259
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.5824228989228,
   "start_distance_m": 369.0,
   "end_distance_m": 374.0,
   "midpoint_distance_m": 371.5,
   "start_elevation_m": 65.00071773902204,
   "end_elevation_m": 64.3715965940759,
   "start_xy": [
    495115.7699091104,
    6411651.327671521
   ],
   "end_xy": [
    495111.5979374274,
    6411654.08351119
   ]
  },
  "min_10m": {
   "gradient_pct": -10.880057801429501,
   "start_distance_m": 365.0,
   "end_distance_m": 375.0,
   "midpoint_distance_m": 370.0,
   "start_elevation_m": 65.34418482469039,
   "end_elevation_m": 64.25617904454744,
   "start_xy": [
    495119.10748645675,
    6411649.122999786
   ],
   "end_xy": [
    495110.7635430908,
    6411654.634679123
   ]
  },
  "min_20m": {
   "gradient_pct": -9.127172621679378,
   "start_distance_m": 355.0,
   "end_distance_m": 375.0,
   "midpoint_distance_m": 365.0,
   "start_elevation_m": 66.08161356888331,
   "end_elevation_m": 64.25617904454744,
   "start_xy": [
    495127.4514298227,
    6411643.611320451
   ],
   "end_xy": [
    495110.7635430908,
    6411654.634679123
   ]
  },
  "min_25m": {
   "gradient_pct": -8.467176229659344,
   "start_distance_m": 359.0,
   "end_distance_m": 384.0,
   "midpoint_distance_m": 371.5,
   "start_elevation_m": 65.82909384482048,
   "end_elevation_m": 63.71229978740564,
   "start_xy": [
    495124.11385247635,
    6411645.815992185
   ],
   "end_xy": [
    495103.25399406144,
    6411659.595190526
   ]
  },
  "min_50m": {
   "gradient_pct": -6.918173900391209,
   "start_distance_m": 340.0,
   "end_distance_m": 390.0,
   "midpoint_distance_m": 365.0,
   "start_elevation_m": 66.89828270000052,
   "end_elevation_m": 63.43919574980492,
   "start_xy": [
    495139.96734487166,
    6411635.343801446
   ],
   "end_xy": [
    495098.24762804183,
    6411662.9021981275
   ]
  },
  "min_100m": {
   "gradient_pct": -6.452142424359607,
   "start_distance_m": 288.0,
   "end_distance_m": 388.0,
   "midpoint_distance_m": 338.0,
   "start_elevation_m": 69.9958137041816,
   "end_elevation_m": 63.54367127982199,
   "start_xy": [
    495181.22464699013,
    6411603.742103784
   ],
   "end_xy": [
    495099.9164167151,
    6411661.79986226
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 42.05742007505151,
   "start_distance_m": 813.0,
   "end_distance_m": 815.0,
   "midpoint_distance_m": 814.0,
   "start_elevation_m": 64.24835946024531,
   "end_elevation_m": 65.08950786174634,
   "start_xy": [
    494760.062164052,
    6411846.181021726
   ],
   "end_xy": [
    494761.1710731165,
    6411847.8454497615
   ]
  },
  "max_3m": {
   "gradient_pct": 36.842566056502335,
   "start_distance_m": 813.0,
   "end_distance_m": 816.0,
   "midpoint_distance_m": 814.5,
   "start_elevation_m": 64.24835946024531,
   "end_elevation_m": 65.35363644194038,
   "start_xy": [
    494760.062164052,
    6411846.181021726
   ],
   "end_xy": [
    494761.72552764876,
    6411848.67766378
   ]
  }
 },
 "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": 0.377,
   "obstruction_max_height_m": 22.01,
   "flagged_windows_m": [
    10,
    50,
    100
   ]
  },
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "16bcc1553fe58b280e0c4a66a3ab0980530490a6",
   "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-so3",
   "road_pbf": "block-batch-fr-so3.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": "sha256:18f786cf9fa98070"
  },
  "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_E494-N6411_0m5@21LHD2HN-2025-06-11.tif",
   "data/cache/fr/ign-lidarhd_dtm_E494-N6412_0m5@21LHD2HN-2025-06-11.tif",
   "data/cache/fr/ign-lidarhd_dtm_E495-N6411_0m5@21LHD2HN-2025-06-11.tif",
   "data/cache/fr/ign-lidarhd_dtm_E495-N6412_0m5@21LHD2HN-2025-06-11.tif"
  ],
  "calculated_at": "2026-09-27T05:27:32+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-so3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-so3",
  "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": [
   "E494-N6411",
   "E494-N6412",
   "E495-N6411",
   "E495-N6412"
  ],
  "elevation_blocks": [
   "21LHD2HN@2025-06-11"
  ],
  "ign_dalles": [
   "LHD_FXX_0494_6412_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0494_6413_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0495_6412_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0495_6413_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD2HN"
  ],
  "ign_editions": [
   "2025-06-11"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0494_6412_MNT_O_0M50_LAMB93_IGN69": "2025-06-11",
   "LHD_FXX_0494_6413_MNT_O_0M50_LAMB93_IGN69": "2025-06-11",
   "LHD_FXX_0495_6412_MNT_O_0M50_LAMB93_IGN69": "2025-06-11",
   "LHD_FXX_0495_6413_MNT_O_0M50_LAMB93_IGN69": "2025-06-11"
  },
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked",
  "carriageway": {
   "stations": 73,
   "stations_resolved": 73,
   "width_median_m": 5.75,
   "width_p10_m": 2.05,
   "width_min_m": 1.0,
   "width_max_m": 11.5,
   "bounded_share": 0.301,
   "unbounded_share": 0.699,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.38,
   "window_m": [
    793.0,
    818.0
   ],
   "width_at_max25_m": 2.0,
   "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": 73,
    "stations_resolved": 73,
    "width_median_m": 3.5,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.644,
    "unbounded_share": 0.356,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.25,
    "window_m": [
     793.0,
     818.0
    ],
    "width_at_max25_m": 1.5,
    "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": "Pomport",
  "county": "Dordogne",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}