{
 "ocl_version": "0.1.0",
 "name": "Chemin Battelier",
 "slug": "chemin-battelier",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 41.0639948154639,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 931.0,
   "end_distance_m": 933.0,
   "start_elevation_m": 243.55476027333103,
   "end_elevation_m": 244.3760401696403,
   "min_gradient_pct": -9.707150763912864
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.58433851508486,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1074.0,
   "end_distance_m": 1077.0,
   "start_elevation_m": 268.8286083837528,
   "end_elevation_m": 269.92613853920534,
   "min_gradient_pct": -7.12183712667714
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.66320517220311,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1073.0,
   "end_distance_m": 1078.0,
   "start_elevation_m": 268.51757113805627,
   "end_elevation_m": 270.2507313966664,
   "min_gradient_pct": -3.9213602893477173
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.010824773351715,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1070.0,
   "end_distance_m": 1080.0,
   "start_elevation_m": 267.9101205507671,
   "end_elevation_m": 270.71120302810226,
   "min_gradient_pct": -1.553083948219296
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.067189288011548,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1059.0,
   "end_distance_m": 1079.0,
   "start_elevation_m": 265.6686283997357,
   "end_elevation_m": 270.48206625733803,
   "min_gradient_pct": -1.095344773269744
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.21107110931166,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1055.0,
   "end_distance_m": 1080.0,
   "start_elevation_m": 264.90843525077435,
   "end_elevation_m": 270.71120302810226,
   "min_gradient_pct": -0.8705902547796995
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.745216574594792,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1030.0,
   "end_distance_m": 1080.0,
   "start_elevation_m": 259.83859474080487,
   "end_elevation_m": 270.71120302810226,
   "min_gradient_pct": -0.09241283065296102
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.503355490756007,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1027.0,
   "end_distance_m": 1127.0,
   "start_elevation_m": 259.2744933547048,
   "end_elevation_m": 279.7778488454608,
   "min_gradient_pct": 0.6781219637095433
  }
 ],
 "shape": {
  "ascent_concentration": 0.583,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 317.0,
  "shape_class": "stepped"
 },
 "length_m": 1551.2847700364553,
 "start_elevation_m": 201.35860713867086,
 "end_elevation_m": 294.8499265605529,
 "endpoint_gain_m": 93.49131942188203,
 "overall_gradient_pct": 6.026702590504061,
 "accumulated_ascent_m": 95.0236430135912,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.66320517220311,
   "start_distance_m": 1073.0,
   "end_distance_m": 1078.0,
   "midpoint_distance_m": 1075.5,
   "start_elevation_m": 268.51757113805627,
   "end_elevation_m": 270.2507313966664,
   "start_xy": [
    448610.69659751054,
    6270490.034314338
   ],
   "end_xy": [
    448605.9199370042,
    6270488.556642382
   ]
  },
  "max_10m": {
   "gradient_pct": 28.010824773351715,
   "start_distance_m": 1070.0,
   "end_distance_m": 1080.0,
   "midpoint_distance_m": 1075.0,
   "start_elevation_m": 267.9101205507671,
   "end_elevation_m": 270.71120302810226,
   "start_xy": [
    448613.5625938144,
    6270490.920917511
   ],
   "end_xy": [
    448604.0092728017,
    6270487.9655736005
   ]
  },
  "max_20m": {
   "gradient_pct": 24.067189288011548,
   "start_distance_m": 1059.0,
   "end_distance_m": 1079.0,
   "midpoint_distance_m": 1069.0,
   "start_elevation_m": 265.6686283997357,
   "end_elevation_m": 270.48206625733803,
   "start_xy": [
    448624.07124692836,
    6270494.171795812
   ],
   "end_xy": [
    448604.96460490295,
    6270488.261107991
   ]
  },
  "max_25m": {
   "gradient_pct": 23.21107110931166,
   "start_distance_m": 1055.0,
   "end_distance_m": 1080.0,
   "midpoint_distance_m": 1067.5,
   "start_elevation_m": 264.90843525077435,
   "end_elevation_m": 270.71120302810226,
   "start_xy": [
    448627.8925753334,
    6270495.353933376
   ],
   "end_xy": [
    448604.0092728017,
    6270487.9655736005
   ]
  },
  "max_50m": {
   "gradient_pct": 21.745216574594792,
   "start_distance_m": 1030.0,
   "end_distance_m": 1080.0,
   "midpoint_distance_m": 1055.0,
   "start_elevation_m": 259.83859474080487,
   "end_elevation_m": 270.71120302810226,
   "start_xy": [
    448650.7110373801,
    6270505.3621938
   ],
   "end_xy": [
    448604.0092728017,
    6270487.9655736005
   ]
  },
  "max_100m": {
   "gradient_pct": 20.503355490756007,
   "start_distance_m": 1027.0,
   "end_distance_m": 1127.0,
   "midpoint_distance_m": 1077.0,
   "start_elevation_m": 259.2744933547048,
   "end_elevation_m": 279.7778488454608,
   "start_xy": [
    448653.38290782657,
    6270506.726418238
   ],
   "end_xy": [
    448558.0798346992,
    6270494.943796121
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.9213602893477173,
   "start_distance_m": 224.0,
   "end_distance_m": 229.0,
   "midpoint_distance_m": 226.5,
   "start_elevation_m": 211.31875899461053,
   "end_elevation_m": 211.12269098014315,
   "start_xy": [
    449359.4417002283,
    6270603.006214577
   ],
   "end_xy": [
    449357.0130790951,
    6270607.376775112
   ]
  },
  "min_10m": {
   "gradient_pct": -1.553083948219296,
   "start_distance_m": 1245.0,
   "end_distance_m": 1255.0,
   "midpoint_distance_m": 1250.0,
   "start_elevation_m": 286.363827621935,
   "end_elevation_m": 286.2085192271131,
   "start_xy": [
    448454.8653510391,
    6270442.6622565165
   ],
   "end_xy": [
    448446.6253468487,
    6270436.996364624
   ]
  },
  "min_20m": {
   "gradient_pct": -1.095344773269744,
   "start_distance_m": 1239.0,
   "end_distance_m": 1259.0,
   "midpoint_distance_m": 1249.0,
   "start_elevation_m": 286.42406441102776,
   "end_elevation_m": 286.2049954563738,
   "start_xy": [
    448459.80935355334,
    6270446.061791653
   ],
   "end_xy": [
    448443.3293451725,
    6270434.730007867
   ]
  },
  "min_25m": {
   "gradient_pct": -0.8705902547796995,
   "start_distance_m": 1240.0,
   "end_distance_m": 1265.0,
   "midpoint_distance_m": 1252.5,
   "start_elevation_m": 286.4310647071998,
   "end_elevation_m": 286.2134171435049,
   "start_xy": [
    448458.9853531343,
    6270445.495202463
   ],
   "end_xy": [
    448438.4984745325,
    6270431.185232995
   ]
  },
  "min_50m": {
   "gradient_pct": -0.09241283065296102,
   "start_distance_m": 1223.0,
   "end_distance_m": 1273.0,
   "midpoint_distance_m": 1248.0,
   "start_elevation_m": 286.2967004168023,
   "end_elevation_m": 286.25049400147583,
   "start_xy": [
    448472.993360258,
    6270455.127218681
   ],
   "end_xy": [
    448432.4901689134,
    6270425.903162985
   ]
  },
  "min_100m": {
   "gradient_pct": 0.6781219637095433,
   "start_distance_m": 1216.0,
   "end_distance_m": 1316.0,
   "midpoint_distance_m": 1266.0,
   "start_elevation_m": 286.24014815557655,
   "end_elevation_m": 286.9182701192861,
   "start_xy": [
    448478.7613631913,
    6270459.093343006
   ],
   "end_xy": [
    448400.19552621077,
    6270397.512036683
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 41.0639948154639,
   "start_distance_m": 931.0,
   "end_distance_m": 933.0,
   "midpoint_distance_m": 932.0,
   "start_elevation_m": 243.55476027333103,
   "end_elevation_m": 244.3760401696403,
   "start_xy": [
    448708.69297025487,
    6270448.701211755
   ],
   "end_xy": [
    448707.98461636587,
    6270450.571568611
   ]
  },
  "max_3m": {
   "gradient_pct": 36.58433851508486,
   "start_distance_m": 1074.0,
   "end_distance_m": 1077.0,
   "midpoint_distance_m": 1075.5,
   "start_elevation_m": 268.8286083837528,
   "end_elevation_m": 269.92613853920534,
   "start_xy": [
    448609.7412654093,
    6270489.738779947
   ],
   "end_xy": [
    448606.8752691055,
    6270488.852176773
   ]
  }
 },
 "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": 0.218,
   "obstruction_max_height_m": 22.71,
   "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-pyr2",
   "road_pbf": "block-batch-fr-pyr2.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:c54ac68b3f57b41b"
  },
  "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_E448-N6270_0m5@21LHD1GQ-2025-04-11.tif",
   "data/cache/fr/ign-lidarhd_dtm_E449-N6270_0m5@21LHD1GQ-2026-03-20.tif"
  ],
  "calculated_at": "2026-09-20T06:42:00+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pyr2",
  "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": [
   "E448-N6270",
   "E449-N6270"
  ],
  "elevation_blocks": [
   "21LHD1GQ@2025-04-11",
   "21LHD1GQ@2026-03-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0448_6271_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0449_6271_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD1GQ"
  ],
  "ign_editions": [
   "2025-04-11",
   "2026-03-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0448_6271_MNT_O_0M50_LAMB93_IGN69": "2025-04-11",
   "LHD_FXX_0449_6271_MNT_O_0M50_LAMB93_IGN69": "2026-03-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 68,
   "stations_resolved": 68,
   "width_median_m": 4.38,
   "width_p10_m": 2.42,
   "width_min_m": 2.0,
   "width_max_m": 11.0,
   "bounded_share": 0.279,
   "unbounded_share": 0.721,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.0,
   "window_m": [
    1055.0,
    1080.0
   ],
   "width_at_max25_m": 2.88,
   "window_stations": 6,
   "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": 68,
    "stations_resolved": 68,
    "width_median_m": 6.0,
    "width_p10_m": 1.43,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.662,
    "unbounded_share": 0.338,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.0,
    "window_m": [
     1055.0,
     1080.0
    ],
    "width_at_max25_m": 3.0,
    "window_stations": 6,
    "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": "Corb\u00e8re-Ab\u00e8res",
  "county": "Pyr\u00e9n\u00e9es-Atlantiques",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}