{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.2857, 6.0595)",
 "slug": "discovered-lane-44-2857-6-0595",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.52783504831723,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3483.0,
   "end_distance_m": 3485.0,
   "start_elevation_m": 1132.4337118339715,
   "end_elevation_m": 1133.2442685349379,
   "min_gradient_pct": -123.63329140519,
   "suppressed_max_gradient_pct": 114.67634197759935,
   "suppressed_location_m": [
    909.0,
    911.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.29510989118868,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3482.0,
   "end_distance_m": 3485.0,
   "start_elevation_m": 1132.2454152382022,
   "end_elevation_m": 1133.2442685349379,
   "min_gradient_pct": -116.2132321088355,
   "suppressed_max_gradient_pct": 105.90367005947883,
   "suppressed_location_m": [
    908.0,
    911.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.22983350777031,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3480.0,
   "end_distance_m": 3485.0,
   "start_elevation_m": 1132.0327768595494,
   "end_elevation_m": 1133.2442685349379,
   "min_gradient_pct": -109.7783964739574,
   "suppressed_max_gradient_pct": 98.93087923802568,
   "suppressed_location_m": [
    909.0,
    914.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.963373018418224,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3633.0,
   "end_distance_m": 3643.0,
   "start_elevation_m": 1144.1253352205106,
   "end_elevation_m": 1146.3216725223524,
   "min_gradient_pct": -76.12979987016502,
   "suppressed_max_gradient_pct": 76.11604623606922,
   "suppressed_location_m": [
    905.0,
    915.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.718962463069147,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3633.0,
   "end_distance_m": 3653.0,
   "start_elevation_m": 1144.1253352205106,
   "end_elevation_m": 1148.4691277131244,
   "min_gradient_pct": -39.671774606595704,
   "suppressed_max_gradient_pct": 41.720429008628344,
   "suppressed_location_m": [
    905.0,
    925.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.523120074205508,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3633.0,
   "end_distance_m": 3658.0,
   "start_elevation_m": 1144.1253352205106,
   "end_elevation_m": 1149.506115239062,
   "min_gradient_pct": -31.781662525966112,
   "suppressed_max_gradient_pct": 34.67300356889564,
   "suppressed_location_m": [
    905.0,
    930.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.53664216052448,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3616.0,
   "end_distance_m": 3666.0,
   "start_elevation_m": 1141.1522314117437,
   "end_elevation_m": 1150.920552492006,
   "min_gradient_pct": -14.667605800074853,
   "suppressed_max_gradient_pct": 19.986948038738547,
   "suppressed_location_m": [
    905.0,
    955.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.801572021058064,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 3602.0,
   "end_distance_m": 3702.0,
   "start_elevation_m": 1139.350196547439,
   "end_elevation_m": 1154.1517685684971,
   "min_gradient_pct": -5.387990004983976
  }
 ],
 "shape": {
  "ascent_concentration": 0.304,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 76.0,
  "shape_class": "sustained"
 },
 "length_m": 3702.439160340191,
 "start_elevation_m": 899.0230577392574,
 "end_elevation_m": 1154.2078855761902,
 "endpoint_gain_m": 255.18482783693275,
 "overall_gradient_pct": 6.892343581777738,
 "accumulated_ascent_m": 269.8058691244672,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.22983350777031,
   "start_distance_m": 3480.0,
   "end_distance_m": 3485.0,
   "midpoint_distance_m": 3482.5,
   "start_elevation_m": 1132.0327768595494,
   "end_elevation_m": 1133.2442685349379,
   "start_xy": [
    944687.2285809008,
    6358108.531109614
   ],
   "end_xy": [
    944687.6545699557,
    6358113.512051542
   ]
  },
  "max_10m": {
   "gradient_pct": 21.963373018418224,
   "start_distance_m": 3633.0,
   "end_distance_m": 3643.0,
   "midpoint_distance_m": 3638.0,
   "start_elevation_m": 1144.1253352205106,
   "end_elevation_m": 1146.3216725223524,
   "start_xy": [
    944809.1139326365,
    6358143.428026223
   ],
   "end_xy": [
    944818.8867455572,
    6358141.365259534
   ]
  },
  "max_20m": {
   "gradient_pct": 21.718962463069147,
   "start_distance_m": 3633.0,
   "end_distance_m": 3653.0,
   "midpoint_distance_m": 3643.0,
   "start_elevation_m": 1144.1253352205106,
   "end_elevation_m": 1148.4691277131244,
   "start_xy": [
    944809.1139326365,
    6358143.428026223
   ],
   "end_xy": [
    944828.0087058251,
    6358137.396889574
   ]
  },
  "max_25m": {
   "gradient_pct": 21.523120074205508,
   "start_distance_m": 3633.0,
   "end_distance_m": 3658.0,
   "midpoint_distance_m": 3645.5,
   "start_elevation_m": 1144.1253352205106,
   "end_elevation_m": 1149.506115239062,
   "start_xy": [
    944809.1139326365,
    6358143.428026223
   ],
   "end_xy": [
    944831.8154556899,
    6358134.155183933
   ]
  },
  "max_50m": {
   "gradient_pct": 19.53664216052448,
   "start_distance_m": 3616.0,
   "end_distance_m": 3666.0,
   "midpoint_distance_m": 3641.0,
   "start_elevation_m": 1141.1522314117437,
   "end_elevation_m": 1150.920552492006,
   "start_xy": [
    944792.1605366052,
    6358143.942196209
   ],
   "end_xy": [
    944837.9062554736,
    6358128.968454906
   ]
  },
  "max_100m": {
   "gradient_pct": 14.801572021058064,
   "start_distance_m": 3602.0,
   "end_distance_m": 3702.0,
   "midpoint_distance_m": 3652.0,
   "start_elevation_m": 1139.350196547439,
   "end_elevation_m": 1154.1517685684971,
   "start_xy": [
    944778.1749138576,
    6358143.307880544
   ],
   "end_xy": [
    944853.9339396236,
    6358097.060323934
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -109.7783964739574,
   "start_distance_m": 897.0,
   "end_distance_m": 902.0,
   "midpoint_distance_m": 899.5,
   "start_elevation_m": 928.8956180314306,
   "end_elevation_m": 923.4066982077327,
   "start_xy": [
    944402.5718150671,
    6358543.151786295
   ],
   "end_xy": [
    944401.9965808142,
    6358538.337786889
   ]
  },
  "min_10m": {
   "gradient_pct": -76.12979987016502,
   "start_distance_m": 895.0,
   "end_distance_m": 905.0,
   "midpoint_distance_m": 900.0,
   "start_elevation_m": 930.8518240278148,
   "end_elevation_m": 923.2388440407983,
   "start_xy": [
    944402.1211473683,
    6358545.100349516
   ],
   "end_xy": [
    944401.1251530773,
    6358535.467139975
   ]
  },
  "min_20m": {
   "gradient_pct": -39.671774606595704,
   "start_distance_m": 885.0,
   "end_distance_m": 905.0,
   "midpoint_distance_m": 895.0,
   "start_elevation_m": 931.1731989621175,
   "end_elevation_m": 923.2388440407983,
   "start_xy": [
    944395.5262710546,
    6358552.16217852
   ],
   "end_xy": [
    944401.1251530773,
    6358535.467139975
   ]
  },
  "min_25m": {
   "gradient_pct": -31.781662525966112,
   "start_distance_m": 880.0,
   "end_distance_m": 905.0,
   "midpoint_distance_m": 892.5,
   "start_elevation_m": 931.1842596722898,
   "end_elevation_m": 923.2388440407983,
   "start_xy": [
    944390.9650244946,
    6358554.210355714
   ],
   "end_xy": [
    944401.1251530773,
    6358535.467139975
   ]
  },
  "min_50m": {
   "gradient_pct": -14.667605800074853,
   "start_distance_m": 855.0,
   "end_distance_m": 905.0,
   "midpoint_distance_m": 880.0,
   "start_elevation_m": 930.5726469408357,
   "end_elevation_m": 923.2388440407983,
   "start_xy": [
    944371.7601225489,
    6358569.1764100045
   ],
   "end_xy": [
    944401.1251530773,
    6358535.467139975
   ]
  },
  "min_100m": {
   "gradient_pct": -5.387990004983976,
   "start_distance_m": 805.0,
   "end_distance_m": 905.0,
   "midpoint_distance_m": 855.0,
   "start_elevation_m": 928.6268340457823,
   "end_elevation_m": 923.2388440407983,
   "start_xy": [
    944336.8604434503,
    6358602.8199609015
   ],
   "end_xy": [
    944401.1251530773,
    6358535.467139975
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.52783504831723,
   "start_distance_m": 3483.0,
   "end_distance_m": 3485.0,
   "midpoint_distance_m": 3484.0,
   "start_elevation_m": 1132.4337118339715,
   "end_elevation_m": 1133.2442685349379,
   "start_xy": [
    944687.4937686214,
    6358111.519365874
   ],
   "end_xy": [
    944687.6545699557,
    6358113.512051542
   ]
  },
  "max_3m": {
   "gradient_pct": 33.29510989118868,
   "start_distance_m": 3482.0,
   "end_distance_m": 3485.0,
   "midpoint_distance_m": 3483.5,
   "start_elevation_m": 1132.2454152382022,
   "end_elevation_m": 1133.2442685349379,
   "start_xy": [
    944687.4053727145,
    6358110.523280454
   ],
   "end_xy": [
    944687.6545699557,
    6358113.512051542
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.016,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.025,
   "obstruction_max_height_m": 16.8,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    0.0,
    20.0
   ],
   [
    882.0,
    921.0
   ]
  ],
  "review": [],
  "extent": [
   "descends_at_start",
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "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_E944-N6357_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E944-N6358_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E944-N6359_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:28:32+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps3",
  "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": [
   "E944-N6357",
   "E944-N6358",
   "E944-N6359"
  ],
  "elevation_blocks": [
   "21LHD8QO@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_0944_6358_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0944_6359_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0944_6360_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8QO"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0944_6358_MNT_O_0M50_LAMB93_IGN69": "2025-04-02",
   "LHD_FXX_0944_6359_MNT_O_0M50_LAMB93_IGN69": "2025-04-02",
   "LHD_FXX_0944_6360_MNT_O_0M50_LAMB93_IGN69": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 8,
  "structure_mask_ranges_m": [
   [
    898.7,
    915.9
   ],
   [
    0.0,
    15.0
   ]
  ],
  "mask_basin_extension_m": 11.0,
  "carriageway": {
   "stations": 155,
   "stations_resolved": 155,
   "width_median_m": 5.0,
   "width_p10_m": 3.5,
   "width_min_m": 1.75,
   "width_max_m": 12.0,
   "bounded_share": 0.323,
   "unbounded_share": 0.677,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.0,
   "window_m": [
    3633.0,
    3658.0
   ],
   "width_at_max25_m": 3.75,
   "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": 155,
    "stations_resolved": 155,
    "width_median_m": 7.0,
    "width_p10_m": 4.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.755,
    "unbounded_share": 0.245,
    "confidence_median": 1.0,
    "width_median_bounded_m": 6.5,
    "window_m": [
     3633.0,
     3658.0
    ],
    "width_at_max25_m": 4.25,
    "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": "Valavoire",
  "county": "Alpes-de-Haute-Provence",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}