{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (48.8474, -0.5234)",
 "slug": "discovered-lane-48-8474-0-5234",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 43.30537774415504,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 325.0,
   "end_distance_m": 327.0,
   "start_elevation_m": 114.68712016165546,
   "end_elevation_m": 115.55322771653856,
   "min_gradient_pct": -8.60742957226961
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 39.64427150583418,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 325.0,
   "end_distance_m": 328.0,
   "start_elevation_m": 114.68712016165546,
   "end_elevation_m": 115.87644830683048,
   "min_gradient_pct": -3.7958407805547267
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 33.965695502673725,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 324.0,
   "end_distance_m": 329.0,
   "start_elevation_m": 114.38444137000874,
   "end_elevation_m": 116.08272614514243,
   "min_gradient_pct": 0.6272710419290206
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 30.525817013595713,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 323.0,
   "end_distance_m": 333.0,
   "start_elevation_m": 114.21983317568353,
   "end_elevation_m": 117.2724148770431,
   "min_gradient_pct": 1.8701799943789865
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.377331695471895,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 313.0,
   "end_distance_m": 333.0,
   "start_elevation_m": 111.99694853794873,
   "end_elevation_m": 117.2724148770431,
   "min_gradient_pct": 2.308205833867163
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.625992234327327,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 308.0,
   "end_distance_m": 333.0,
   "start_elevation_m": 111.11591681846127,
   "end_elevation_m": 117.2724148770431,
   "min_gradient_pct": 2.7107080107680304
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.694067561854098,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 324.0,
   "end_distance_m": 374.0,
   "start_elevation_m": 114.38444137000874,
   "end_elevation_m": 124.7314751509358,
   "min_gradient_pct": 3.40809938808934
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.04455081724238,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 297.0,
   "end_distance_m": 397.0,
   "start_elevation_m": 109.3527371171706,
   "end_elevation_m": 128.397287934413,
   "min_gradient_pct": 3.9215813957775936
  }
 ],
 "shape": {
  "ascent_concentration": 0.396,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 341.0,
  "shape_class": "sustained"
 },
 "length_m": 559.681218670396,
 "start_elevation_m": 75.62842530029046,
 "end_elevation_m": 138.3862283215339,
 "endpoint_gain_m": 62.75780302124345,
 "overall_gradient_pct": 11.21313364245699,
 "accumulated_ascent_m": 63.18593024559527,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 33.965695502673725,
   "start_distance_m": 324.0,
   "end_distance_m": 329.0,
   "midpoint_distance_m": 326.5,
   "start_elevation_m": 114.38444137000874,
   "end_elevation_m": 116.08272614514243,
   "start_xy": [
    441538.4915784179,
    6866603.863643625
   ],
   "end_xy": [
    441534.5223475364,
    6866600.823050556
   ]
  },
  "max_10m": {
   "gradient_pct": 30.525817013595713,
   "start_distance_m": 323.0,
   "end_distance_m": 333.0,
   "midpoint_distance_m": 328.0,
   "start_elevation_m": 114.21983317568353,
   "end_elevation_m": 117.2724148770431,
   "start_xy": [
    441539.28542459424,
    6866604.471762238
   ],
   "end_xy": [
    441531.3469628312,
    6866598.390576101
   ]
  },
  "max_20m": {
   "gradient_pct": 26.377331695471895,
   "start_distance_m": 313.0,
   "end_distance_m": 333.0,
   "midpoint_distance_m": 323.0,
   "start_elevation_m": 111.99694853794873,
   "end_elevation_m": 117.2724148770431,
   "start_xy": [
    441547.2238863573,
    6866610.552948375
   ],
   "end_xy": [
    441531.3469628312,
    6866598.390576101
   ]
  },
  "max_25m": {
   "gradient_pct": 24.625992234327327,
   "start_distance_m": 308.0,
   "end_distance_m": 333.0,
   "midpoint_distance_m": 320.5,
   "start_elevation_m": 111.11591681846127,
   "end_elevation_m": 117.2724148770431,
   "start_xy": [
    441551.28368244536,
    6866613.453192707
   ],
   "end_xy": [
    441531.3469628312,
    6866598.390576101
   ]
  },
  "max_50m": {
   "gradient_pct": 20.694067561854098,
   "start_distance_m": 324.0,
   "end_distance_m": 374.0,
   "midpoint_distance_m": 349.0,
   "start_elevation_m": 114.38444137000874,
   "end_elevation_m": 124.7314751509358,
   "start_xy": [
    441538.4915784179,
    6866603.863643625
   ],
   "end_xy": [
    441501.8038410574,
    6866570.28496845
   ]
  },
  "max_100m": {
   "gradient_pct": 19.04455081724238,
   "start_distance_m": 297.0,
   "end_distance_m": 397.0,
   "midpoint_distance_m": 347.0,
   "start_elevation_m": 109.3527371171706,
   "end_elevation_m": 128.397287934413,
   "start_xy": [
    441560.97678094474,
    6866618.653562068
   ],
   "end_xy": [
    441486.8444194334,
    6866552.814544737
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.6272710419290206,
   "start_distance_m": 497.0,
   "end_distance_m": 502.0,
   "midpoint_distance_m": 499.5,
   "start_elevation_m": 136.37269654052832,
   "end_elevation_m": 136.40406009262477,
   "start_xy": [
    441420.34704224573,
    6866478.196169599
   ],
   "end_xy": [
    441416.2905781302,
    6866475.27921462
   ]
  },
  "min_10m": {
   "gradient_pct": 1.8701799943789865,
   "start_distance_m": 549.0,
   "end_distance_m": 559.0,
   "midpoint_distance_m": 554.0,
   "start_elevation_m": 138.18974416473338,
   "end_elevation_m": 138.37676216417128,
   "start_xy": [
    441377.89563393226,
    6866448.171498743
   ],
   "end_xy": [
    441369.7264968688,
    6866442.40389962
   ]
  },
  "min_20m": {
   "gradient_pct": 2.308205833867163,
   "start_distance_m": 539.0,
   "end_distance_m": 559.0,
   "midpoint_distance_m": 549.0,
   "start_elevation_m": 137.91512099739785,
   "end_elevation_m": 138.37676216417128,
   "start_xy": [
    441386.06477099564,
    6866453.9390978655
   ],
   "end_xy": [
    441369.7264968688,
    6866442.40389962
   ]
  },
  "min_25m": {
   "gradient_pct": 2.7107080107680304,
   "start_distance_m": 534.0,
   "end_distance_m": 559.0,
   "midpoint_distance_m": 546.5,
   "start_elevation_m": 137.69908516147927,
   "end_elevation_m": 138.37676216417128,
   "start_xy": [
    441390.14933952736,
    6866456.822897427
   ],
   "end_xy": [
    441369.7264968688,
    6866442.40389962
   ]
  },
  "min_50m": {
   "gradient_pct": 3.40809938808934,
   "start_distance_m": 509.0,
   "end_distance_m": 559.0,
   "midpoint_distance_m": 534.0,
   "start_elevation_m": 136.6727124701266,
   "end_elevation_m": 138.37676216417128,
   "start_xy": [
    441410.57218218583,
    6866471.241895233
   ],
   "end_xy": [
    441369.7264968688,
    6866442.40389962
   ]
  },
  "min_100m": {
   "gradient_pct": 3.9215813957775936,
   "start_distance_m": 459.0,
   "end_distance_m": 559.0,
   "midpoint_distance_m": 509.0,
   "start_elevation_m": 134.4551807683937,
   "end_elevation_m": 138.37676216417128,
   "start_xy": [
    441446.5217920299,
    6866505.717987411
   ],
   "end_xy": [
    441369.7264968688,
    6866442.40389962
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 43.30537774415504,
   "start_distance_m": 325.0,
   "end_distance_m": 327.0,
   "midpoint_distance_m": 326.0,
   "start_elevation_m": 114.68712016165546,
   "end_elevation_m": 115.55322771653856,
   "start_xy": [
    441537.6977322416,
    6866603.255525011
   ],
   "end_xy": [
    441536.110039889,
    6866602.039287783
   ]
  },
  "max_3m": {
   "gradient_pct": 39.64427150583418,
   "start_distance_m": 325.0,
   "end_distance_m": 328.0,
   "midpoint_distance_m": 326.5,
   "start_elevation_m": 114.68712016165546,
   "end_elevation_m": 115.87644830683048,
   "start_xy": [
    441537.6977322416,
    6866603.255525011
   ],
   "end_xy": [
    441535.3161937127,
    6866601.43116917
   ]
  }
 },
 "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": 0.08,
   "obstruction_max_height_m": 15.24,
   "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": "11607044e533e467c5c753c7fffd2d09371a473e",
   "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-no2",
   "road_pbf": "block-batch-fr-no2.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": "sha256:396cc16291f947a7"
  },
  "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_E441-N6866_0m5@24LHDGE-2026-06-17.tif"
  ],
  "calculated_at": "2026-09-26T01:20:31+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-no2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-no2",
  "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": [
   "E441-N6866"
  ],
  "elevation_blocks": [
   "24LHDGE@2026-06-17"
  ],
  "ign_dalles": [
   "LHD_FXX_0441_6867_MNT_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "24LHDGE"
  ],
  "ign_editions": [
   "2026-06-17"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0441_6867_MNT_0M50_LAMB93_IGN69": "2026-06-17"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 29,
   "stations_resolved": 29,
   "width_median_m": 3.25,
   "width_p10_m": 1.4,
   "width_min_m": 1.0,
   "width_max_m": 9.0,
   "bounded_share": 0.414,
   "unbounded_share": 0.586,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.25,
   "window_m": [
    308.0,
    333.0
   ],
   "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": 29,
    "stations_resolved": 29,
    "width_median_m": 4.25,
    "width_p10_m": 1.0,
    "width_min_m": 1.0,
    "width_max_m": 11.75,
    "bounded_share": 0.828,
    "unbounded_share": 0.172,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.62,
    "window_m": [
     308.0,
     333.0
    ],
    "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": "Saint-Pierre-du-Regard",
  "county": "Orne",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}