{
 "ocl_version": "0.1.0",
 "name": "Impasse les Terrasses",
 "slug": "impasse-les-terrasses",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 31.081555860015442,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 721.0,
   "end_distance_m": 723.0,
   "start_elevation_m": 728.3167048308069,
   "end_elevation_m": 728.9383359480072,
   "min_gradient_pct": -9.722633580338425
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.76975917247273,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 720.0,
   "end_distance_m": 723.0,
   "start_elevation_m": 728.045243172833,
   "end_elevation_m": 728.9383359480072,
   "min_gradient_pct": -5.284255759060367
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.607763104826063,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 718.0,
   "end_distance_m": 723.0,
   "start_elevation_m": 727.5079477927659,
   "end_elevation_m": 728.9383359480072,
   "min_gradient_pct": -1.3306991573699634
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.857715324026685,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 714.0,
   "end_distance_m": 724.0,
   "start_elevation_m": 726.4949778831584,
   "end_elevation_m": 729.1807494155611,
   "min_gradient_pct": 1.9948418117155597
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.01098674389391,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 223.0,
   "end_distance_m": 243.0,
   "start_elevation_m": 661.0911629664506,
   "end_elevation_m": 666.2933603152294,
   "min_gradient_pct": 3.0560618984048915
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.502758504627764,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 221.0,
   "end_distance_m": 246.0,
   "start_elevation_m": 660.6171357356716,
   "end_elevation_m": 666.9928253618285,
   "min_gradient_pct": 3.4014522888660395
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 23.638140957509677,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 196.0,
   "end_distance_m": 246.0,
   "start_elevation_m": 655.1737548830737,
   "end_elevation_m": 666.9928253618285,
   "min_gradient_pct": 4.237055087478893
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.83082944076648,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 150.0,
   "end_distance_m": 250.0,
   "start_elevation_m": 648.539356032503,
   "end_elevation_m": 667.3701854732694,
   "min_gradient_pct": 4.979153263089756
  }
 ],
 "shape": {
  "ascent_concentration": 0.347,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 164.0,
  "shape_class": "sustained"
 },
 "length_m": 728.4000000000767,
 "start_elevation_m": 638.683907654296,
 "end_elevation_m": 729.8517793540096,
 "endpoint_gain_m": 91.1678716997136,
 "overall_gradient_pct": 12.516182276181219,
 "accumulated_ascent_m": 91.48317554702078,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.607763104826063,
   "start_distance_m": 718.0,
   "end_distance_m": 723.0,
   "midpoint_distance_m": 720.5,
   "start_elevation_m": 727.5079477927659,
   "end_elevation_m": 728.9383359480072,
   "start_xy": [
    768865.7300660692,
    6437629.7623739345
   ],
   "end_xy": [
    768866.577742091,
    6437634.689994594
   ]
  },
  "max_10m": {
   "gradient_pct": 26.857715324026685,
   "start_distance_m": 714.0,
   "end_distance_m": 724.0,
   "midpoint_distance_m": 719.0,
   "start_elevation_m": 726.4949778831584,
   "end_elevation_m": 729.1807494155611,
   "start_xy": [
    768865.0519252517,
    6437625.820277407
   ],
   "end_xy": [
    768866.7472772953,
    6437635.675518726
   ]
  },
  "max_20m": {
   "gradient_pct": 26.01098674389391,
   "start_distance_m": 223.0,
   "end_distance_m": 243.0,
   "midpoint_distance_m": 233.0,
   "start_elevation_m": 661.0911629664506,
   "end_elevation_m": 666.2933603152294,
   "start_xy": [
    769113.1300764938,
    6437685.5358882975
   ],
   "end_xy": [
    769095.5989344999,
    6437695.161845932
   ]
  },
  "max_25m": {
   "gradient_pct": 25.502758504627764,
   "start_distance_m": 221.0,
   "end_distance_m": 246.0,
   "midpoint_distance_m": 233.5,
   "start_elevation_m": 660.6171357356716,
   "end_elevation_m": 666.9928253618285,
   "start_xy": [
    769114.8831906932,
    6437684.573292534
   ],
   "end_xy": [
    769092.9692632008,
    6437696.605739578
   ]
  },
  "max_50m": {
   "gradient_pct": 23.638140957509677,
   "start_distance_m": 196.0,
   "end_distance_m": 246.0,
   "midpoint_distance_m": 221.0,
   "start_elevation_m": 655.1737548830737,
   "end_elevation_m": 666.9928253618285,
   "start_xy": [
    769136.7998328984,
    6437672.545800984
   ],
   "end_xy": [
    769092.9692632008,
    6437696.605739578
   ]
  },
  "max_100m": {
   "gradient_pct": 18.83082944076648,
   "start_distance_m": 150.0,
   "end_distance_m": 250.0,
   "midpoint_distance_m": 200.0,
   "start_elevation_m": 648.539356032503,
   "end_elevation_m": 667.3701854732694,
   "start_xy": [
    769177.1642500013,
    6437650.484209203
   ],
   "end_xy": [
    769093.5899416874,
    6437700.303079193
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.3306991573699634,
   "start_distance_m": 323.0,
   "end_distance_m": 328.0,
   "midpoint_distance_m": 325.5,
   "start_elevation_m": 671.6708524581029,
   "end_elevation_m": 671.6043175002344,
   "start_xy": [
    769074.5954971205,
    6437690.574669705
   ],
   "end_xy": [
    769071.2226815589,
    6437686.88429835
   ]
  },
  "min_10m": {
   "gradient_pct": 1.9948418117155597,
   "start_distance_m": 323.0,
   "end_distance_m": 333.0,
   "midpoint_distance_m": 328.0,
   "start_elevation_m": 671.6708524581029,
   "end_elevation_m": 671.8703366392745,
   "start_xy": [
    769074.5954971205,
    6437690.574669705
   ],
   "end_xy": [
    769068.3251930368,
    6437682.809428995
   ]
  },
  "min_20m": {
   "gradient_pct": 3.0560618984048915,
   "start_distance_m": 27.0,
   "end_distance_m": 47.0,
   "midpoint_distance_m": 37.0,
   "start_elevation_m": 640.0261269146524,
   "end_elevation_m": 640.6373392943334,
   "start_xy": [
    769286.2397439503,
    6437593.679422694
   ],
   "end_xy": [
    769268.5783390346,
    6437603.0576330945
   ]
  },
  "min_25m": {
   "gradient_pct": 3.4014522888660395,
   "start_distance_m": 21.0,
   "end_distance_m": 46.0,
   "midpoint_distance_m": 33.5,
   "start_elevation_m": 639.7330623545744,
   "end_elevation_m": 640.5834254267909,
   "start_xy": [
    769291.5013564058,
    6437590.795773207
   ],
   "end_xy": [
    769269.4723047884,
    6437602.609497813
   ]
  },
  "min_50m": {
   "gradient_pct": 4.237055087478893,
   "start_distance_m": 11.0,
   "end_distance_m": 61.0,
   "midpoint_distance_m": 36.0,
   "start_elevation_m": 639.344992446798,
   "end_elevation_m": 641.4635199905374,
   "start_xy": [
    769300.2707104983,
    6437585.989690728
   ],
   "end_xy": [
    769256.0628184812,
    6437609.331527043
   ]
  },
  "min_100m": {
   "gradient_pct": 4.979153263089756,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 638.683907654296,
   "end_elevation_m": 643.6630609173858,
   "start_xy": [
    769309.917,
    6437580.703
   ],
   "end_xy": [
    769221.1981540825,
    6437626.808803043
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 31.081555860015442,
   "start_distance_m": 721.0,
   "end_distance_m": 723.0,
   "midpoint_distance_m": 722.0,
   "start_elevation_m": 728.3167048308069,
   "end_elevation_m": 728.9383359480072,
   "start_xy": [
    768866.2386716823,
    6437632.71894633
   ],
   "end_xy": [
    768866.577742091,
    6437634.689994594
   ]
  },
  "max_3m": {
   "gradient_pct": 29.76975917247273,
   "start_distance_m": 720.0,
   "end_distance_m": 723.0,
   "midpoint_distance_m": 721.5,
   "start_elevation_m": 728.045243172833,
   "end_elevation_m": 728.9383359480072,
   "start_xy": [
    768866.0691364779,
    6437631.733422198
   ],
   "end_xy": [
    768866.577742091,
    6437634.689994594
   ]
  }
 },
 "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": 0.066,
   "obstruction_max_height_m": 10.07,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25
   ]
  },
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "1cc9fdcd6556a02163cb21acb2293cad3067d2a1",
   "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-mc6",
   "road_pbf": "block-batch-fr-mc6.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_E768-N6437_0m5@21LHD4MM-2025-03-12.tif",
   "data/cache/fr/ign-lidarhd_dtm_E769-N6437_0m5@21LHD4MM-2025-03-12.tif"
  ],
  "calculated_at": "2026-09-22T18:59:29+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc6.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc6",
  "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": [
   "E768-N6437",
   "E769-N6437"
  ],
  "elevation_blocks": [
   "21LHD4MM@2025-03-12"
  ],
  "ign_dalles": [
   "LHD_FXX_0768_6438_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0769_6438_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD4MM"
  ],
  "ign_editions": [
   "2025-03-12"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0768_6438_MNT_O_0M50_LAMB93_IGN69": "2025-03-12",
   "LHD_FXX_0769_6438_MNT_O_0M50_LAMB93_IGN69": "2025-03-12"
  },
  "route_cut_m": 728.4,
  "climb_origin": "discovered",
  "structure_own_ways": 3,
  "carriageway": {
   "stations": 36,
   "stations_resolved": 36,
   "width_median_m": 5.88,
   "width_p10_m": 3.62,
   "width_min_m": 2.25,
   "width_max_m": 12.0,
   "bounded_share": 0.25,
   "unbounded_share": 0.75,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.5,
   "window_m": [
    221.0,
    246.0
   ],
   "width_at_max25_m": 7.75,
   "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": 36,
    "stations_resolved": 36,
    "width_median_m": 4.62,
    "width_p10_m": 1.12,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.722,
    "unbounded_share": 0.278,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.12,
    "window_m": [
     221.0,
     246.0
    ],
    "width_at_max25_m": 3.0,
    "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": "Vals-pr\u00e8s-le-Puy",
  "county": "Haute-Loire",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}