{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (42.6285, 8.9212)",
 "slug": "discovered-lane-42-6285-8-9212",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.00901724065119,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 56.0,
   "end_distance_m": 58.0,
   "start_elevation_m": 51.54356714470059,
   "end_elevation_m": 52.08374748951361,
   "min_gradient_pct": -4.666613847034284
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.25482132056918,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 55.0,
   "end_distance_m": 58.0,
   "start_elevation_m": 51.35610284989654,
   "end_elevation_m": 52.08374748951361,
   "min_gradient_pct": -3.8831720417637903
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.947509439209114,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 161.0,
   "end_distance_m": 166.0,
   "start_elevation_m": 67.25885447912029,
   "end_elevation_m": 68.45622995108074,
   "min_gradient_pct": -3.489242984956036
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.407893910997046,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 158.0,
   "end_distance_m": 168.0,
   "start_elevation_m": 66.58397408663302,
   "end_elevation_m": 68.92476347773272,
   "min_gradient_pct": -2.5707053215130315
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.164715681634362,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 147.0,
   "end_distance_m": 167.0,
   "start_elevation_m": 64.05625456289108,
   "end_elevation_m": 68.68919769921796,
   "min_gradient_pct": -2.0549626387344944
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.121291250839136,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 147.0,
   "end_distance_m": 172.0,
   "start_elevation_m": 64.05625456289108,
   "end_elevation_m": 69.83657737560087,
   "min_gradient_pct": -1.857488064039103
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.798508304014202,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 130.0,
   "end_distance_m": 180.0,
   "start_elevation_m": 60.58726617384802,
   "end_elevation_m": 71.48652032585512,
   "min_gradient_pct": -1.6165819203006606
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.376407539196464,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 108.0,
   "end_distance_m": 208.0,
   "start_elevation_m": 57.45826902225454,
   "end_elevation_m": 74.834676561451,
   "min_gradient_pct": 0.4536006414512599
  }
 ],
 "shape": {
  "ascent_concentration": 0.458,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 90.0,
  "shape_class": "stepped"
 },
 "length_m": 306.47344685386054,
 "start_elevation_m": 43.80568939322448,
 "end_elevation_m": 74.96710114112805,
 "endpoint_gain_m": 31.16141174790357,
 "overall_gradient_pct": 10.167736248537919,
 "accumulated_ascent_m": 32.3859821371214,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.947509439209114,
   "start_distance_m": 161.0,
   "end_distance_m": 166.0,
   "midpoint_distance_m": 163.5,
   "start_elevation_m": 67.25885447912029,
   "end_elevation_m": 68.45622995108074,
   "start_xy": [
    1185877.715149076,
    6188100.743709869
   ],
   "end_xy": [
    1185882.0975163025,
    6188098.346454877
   ]
  },
  "max_10m": {
   "gradient_pct": 23.407893910997046,
   "start_distance_m": 158.0,
   "end_distance_m": 168.0,
   "midpoint_distance_m": 163.0,
   "start_elevation_m": 66.58397408663302,
   "end_elevation_m": 68.92476347773272,
   "start_xy": [
    1185875.0961383316,
    6188102.206851257
   ],
   "end_xy": [
    1185884.016455803,
    6188097.7828316055
   ]
  },
  "max_20m": {
   "gradient_pct": 23.164715681634362,
   "start_distance_m": 147.0,
   "end_distance_m": 167.0,
   "midpoint_distance_m": 157.0,
   "start_elevation_m": 64.05625456289108,
   "end_elevation_m": 68.68919769921796,
   "start_xy": [
    1185865.493098936,
    6188107.571703013
   ],
   "end_xy": [
    1185883.0569860528,
    6188098.064643241
   ]
  },
  "max_25m": {
   "gradient_pct": 23.121291250839136,
   "start_distance_m": 147.0,
   "end_distance_m": 172.0,
   "midpoint_distance_m": 159.5,
   "start_elevation_m": 64.05625456289108,
   "end_elevation_m": 69.83657737560087,
   "start_xy": [
    1185865.493098936,
    6188107.571703013
   ],
   "end_xy": [
    1185887.8543348042,
    6188096.655585062
   ]
  },
  "max_50m": {
   "gradient_pct": 21.798508304014202,
   "start_distance_m": 130.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 155.0,
   "start_elevation_m": 60.58726617384802,
   "end_elevation_m": 71.48652032585512,
   "start_xy": [
    1185850.6520380517,
    6188115.862837546
   ],
   "end_xy": [
    1185895.5300928068,
    6188094.401091972
   ]
  },
  "max_100m": {
   "gradient_pct": 17.376407539196464,
   "start_distance_m": 108.0,
   "end_distance_m": 208.0,
   "midpoint_distance_m": 158.0,
   "start_elevation_m": 57.45826902225454,
   "end_elevation_m": 74.834676561451,
   "start_xy": [
    1185831.4459592602,
    6188126.592541058
   ],
   "end_xy": [
    1185914.908856048,
    6188079.574199082
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.489242984956036,
   "start_distance_m": 299.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 301.5,
   "start_elevation_m": 75.13024321391477,
   "end_elevation_m": 74.95578106466697,
   "start_xy": [
    1185910.0072551984,
    6188001.179618314
   ],
   "end_xy": [
    1185911.9573224555,
    6187996.575572519
   ]
  },
  "min_10m": {
   "gradient_pct": -2.5707053215130315,
   "start_distance_m": 294.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 299.0,
   "start_elevation_m": 75.21285159681827,
   "end_elevation_m": 74.95578106466697,
   "start_xy": [
    1185908.0571879412,
    6188005.78366411
   ],
   "end_xy": [
    1185911.9573224555,
    6187996.575572519
   ]
  },
  "min_20m": {
   "gradient_pct": -2.0549626387344944,
   "start_distance_m": 262.0,
   "end_distance_m": 282.0,
   "midpoint_distance_m": 272.0,
   "start_elevation_m": 75.66814234854236,
   "end_elevation_m": 75.25714982079546,
   "start_xy": [
    1185897.2203466042,
    6188035.77897678
   ],
   "end_xy": [
    1185903.377026524,
    6188016.833374021
   ]
  },
  "min_25m": {
   "gradient_pct": -1.857488064039103,
   "start_distance_m": 257.0,
   "end_distance_m": 282.0,
   "midpoint_distance_m": 269.5,
   "start_elevation_m": 75.72152183680524,
   "end_elevation_m": 75.25714982079546,
   "start_xy": [
    1185896.1165703628,
    6188040.655622965
   ],
   "end_xy": [
    1185903.377026524,
    6188016.833374021
   ]
  },
  "min_50m": {
   "gradient_pct": -1.6165819203006606,
   "start_distance_m": 254.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 279.0,
   "start_elevation_m": 75.7640720248173,
   "end_elevation_m": 74.95578106466697,
   "start_xy": [
    1185895.4543046178,
    6188043.581610675
   ],
   "end_xy": [
    1185911.9573224555,
    6187996.575572519
   ]
  },
  "min_100m": {
   "gradient_pct": 0.4536006414512599,
   "start_distance_m": 206.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 256.0,
   "start_elevation_m": 74.51844215475387,
   "end_elevation_m": 74.97204279620513,
   "start_xy": [
    1185913.9754295587,
    6188081.34301648
   ],
   "end_xy": [
    1185912.7373493584,
    6187994.7339542
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.00901724065119,
   "start_distance_m": 56.0,
   "end_distance_m": 58.0,
   "midpoint_distance_m": 57.0,
   "start_elevation_m": 51.54356714470059,
   "end_elevation_m": 52.08374748951361,
   "start_xy": [
    1185780.9881343544,
    6188129.537068868
   ],
   "end_xy": [
    1185782.9863356475,
    6188129.621872121
   ]
  },
  "max_3m": {
   "gradient_pct": 24.25482132056918,
   "start_distance_m": 55.0,
   "end_distance_m": 58.0,
   "midpoint_distance_m": 56.5,
   "start_elevation_m": 51.35610284989654,
   "end_elevation_m": 52.08374748951361,
   "start_xy": [
    1185779.9890337077,
    6188129.494667242
   ],
   "end_xy": [
    1185782.9863356475,
    6188129.621872121
   ]
  }
 },
 "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": 0.117,
   "obstruction_max_height_m": 6.68,
   "flagged_windows_m": [
    2,
    3
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "33abfff569d4360542e616d0d42c1b94d0a711fa",
   "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-co2",
   "road_pbf": "block-batch-fr-co2.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": "sha256:2a717d675f2607cc"
  },
  "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_E1185-N6187_0m5@21LHDCorseUS-2025-04-02.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1185-N6188_0m5@21LHDCorseUS-2025-04-02.tif"
  ],
  "calculated_at": "2026-09-25T00:46:32+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-co2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-co2",
  "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": [
   "E1185-N6187",
   "E1185-N6188"
  ],
  "elevation_blocks": [
   "21LHDCorseUS@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_1185_6188_MNT_O_0M50_LAMB93_IGN78",
   "LHD_FXX_1185_6189_MNT_O_0M50_LAMB93_IGN78"
  ],
  "ign_missions": [
   "21LHDCorseUS"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1185_6188_MNT_O_0M50_LAMB93_IGN78": "2025-04-02",
   "LHD_FXX_1185_6189_MNT_O_0M50_LAMB93_IGN78": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 19,
   "stations_resolved": 19,
   "width_median_m": 5.5,
   "width_p10_m": 3.7,
   "width_min_m": 3.25,
   "width_max_m": 8.5,
   "bounded_share": 0.105,
   "unbounded_share": 0.895,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.62,
   "window_m": [
    147.0,
    172.0
   ],
   "width_at_max25_m": 5.0,
   "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": 19,
    "stations_resolved": 19,
    "width_median_m": 2.5,
    "width_p10_m": 1.0,
    "width_min_m": 1.0,
    "width_max_m": 7.5,
    "bounded_share": 0.895,
    "unbounded_share": 0.105,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.25,
    "window_m": [
     147.0,
     172.0
    ],
    "width_at_max25_m": 2.5,
    "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": "Corbara",
  "county": "Haute-Corse",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}