{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (43.8028, 7.5050)",
 "slug": "discovered-lane-43-8028-7-5050",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.99360409322219,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 20.0,
   "end_distance_m": 22.0,
   "start_elevation_m": 367.41714857722377,
   "end_elevation_m": 368.1770206590882,
   "min_gradient_pct": -3.1353737962177775
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.29176267560297,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 20.0,
   "end_distance_m": 23.0,
   "start_elevation_m": 367.41714857722377,
   "end_elevation_m": 368.50590145749186,
   "min_gradient_pct": -1.7724431609337898
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.876763547555356,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 20.0,
   "end_distance_m": 25.0,
   "start_elevation_m": 367.41714857722377,
   "end_elevation_m": 369.16098675460154,
   "min_gradient_pct": 0.13286218627854396
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 33.206773654410995,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 20.0,
   "end_distance_m": 30.0,
   "start_elevation_m": 367.41714857722377,
   "end_elevation_m": 370.73782594266487,
   "min_gradient_pct": 2.2908874230085985
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 29.10798778750575,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 11.0,
   "end_distance_m": 31.0,
   "start_elevation_m": 365.1623872496847,
   "end_elevation_m": 370.98398480718583,
   "min_gradient_pct": 2.8648035291936935
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 27.918409485388338,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 5.0,
   "end_distance_m": 30.0,
   "start_elevation_m": 363.7582235713178,
   "end_elevation_m": 370.73782594266487,
   "min_gradient_pct": 3.2612345768698106
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.909219487533846,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 185.0,
   "end_distance_m": 235.0,
   "start_elevation_m": 387.73985760405554,
   "end_elevation_m": 398.69446734782247,
   "min_gradient_pct": 3.343586155145317
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.80680895667058,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 152.0,
   "end_distance_m": 252.0,
   "start_elevation_m": 380.9089452105095,
   "end_elevation_m": 401.7157541671801,
   "min_gradient_pct": 7.443922225610265
  }
 ],
 "shape": {
  "ascent_concentration": 0.355,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 217.0,
  "shape_class": "sustained"
 },
 "length_m": 299.800000000021,
 "start_elevation_m": 362.543677158215,
 "end_elevation_m": 407.88682471272114,
 "endpoint_gain_m": 45.34314755450612,
 "overall_gradient_pct": 15.124465495164426,
 "accumulated_ascent_m": 45.40748607789931,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.876763547555356,
   "start_distance_m": 20.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 22.5,
   "start_elevation_m": 367.41714857722377,
   "end_elevation_m": 369.16098675460154,
   "start_xy": [
    1062355.8903241912,
    6310757.039117835
   ],
   "end_xy": [
    1062359.6558710462,
    6310760.314772976
   ]
  },
  "max_10m": {
   "gradient_pct": 33.206773654410995,
   "start_distance_m": 20.0,
   "end_distance_m": 30.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 367.41714857722377,
   "end_elevation_m": 370.73782594266487,
   "start_xy": [
    1062355.8903241912,
    6310757.039117835
   ],
   "end_xy": [
    1062361.8172780722,
    6310764.823466763
   ]
  },
  "max_20m": {
   "gradient_pct": 29.10798778750575,
   "start_distance_m": 11.0,
   "end_distance_m": 31.0,
   "midpoint_distance_m": 21.0,
   "start_elevation_m": 365.1623872496847,
   "end_elevation_m": 370.98398480718583,
   "start_xy": [
    1062349.048336268,
    6310751.1921356
   ],
   "end_xy": [
    1062362.2495594774,
    6310765.72520552
   ]
  },
  "max_25m": {
   "gradient_pct": 27.918409485388338,
   "start_distance_m": 5.0,
   "end_distance_m": 30.0,
   "midpoint_distance_m": 17.5,
   "start_elevation_m": 363.7582235713178,
   "end_elevation_m": 370.73782594266487,
   "start_xy": [
    1062344.063749376,
    6310748.103034214
   ],
   "end_xy": [
    1062361.8172780722,
    6310764.823466763
   ]
  },
  "max_50m": {
   "gradient_pct": 21.909219487533846,
   "start_distance_m": 185.0,
   "end_distance_m": 235.0,
   "midpoint_distance_m": 210.0,
   "start_elevation_m": 387.73985760405554,
   "end_elevation_m": 398.69446734782247,
   "start_xy": [
    1062391.3141308383,
    6310742.948899865
   ],
   "end_xy": [
    1062394.817516038,
    6310693.506051175
   ]
  },
  "max_100m": {
   "gradient_pct": 20.80680895667058,
   "start_distance_m": 152.0,
   "end_distance_m": 252.0,
   "midpoint_distance_m": 202.0,
   "start_elevation_m": 380.9089452105095,
   "end_elevation_m": 401.7157541671801,
   "start_xy": [
    1062387.0066523605,
    6310774.984437216
   ],
   "end_xy": [
    1062397.8644919358,
    6310676.781340778
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.13286218627854396,
   "start_distance_m": 33.0,
   "end_distance_m": 38.0,
   "midpoint_distance_m": 35.5,
   "start_elevation_m": 371.25100048112284,
   "end_elevation_m": 371.25764359043677,
   "start_xy": [
    1062363.2199955173,
    6310767.423543745
   ],
   "end_xy": [
    1062367.580503685,
    6310769.415506715
   ]
  },
  "min_10m": {
   "gradient_pct": 2.2908874230085985,
   "start_distance_m": 34.0,
   "end_distance_m": 44.0,
   "midpoint_distance_m": 39.0,
   "start_elevation_m": 371.3124479327336,
   "end_elevation_m": 371.5415366750345,
   "start_xy": [
    1062364.1187053907,
    6310767.8620874295
   ],
   "end_xy": [
    1062367.2585305972,
    6310763.424151832
   ]
  },
  "min_20m": {
   "gradient_pct": 2.8648035291936935,
   "start_distance_m": 34.0,
   "end_distance_m": 54.0,
   "midpoint_distance_m": 44.0,
   "start_elevation_m": 371.3124479327336,
   "end_elevation_m": 371.88540863857236,
   "start_xy": [
    1062364.1187053907,
    6310767.8620874295
   ],
   "end_xy": [
    1062364.7473367003,
    6310753.936932334
   ]
  },
  "min_25m": {
   "gradient_pct": 3.2612345768698106,
   "start_distance_m": 34.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 46.5,
   "start_elevation_m": 371.3124479327336,
   "end_elevation_m": 372.12775657695107,
   "start_xy": [
    1062364.1187053907,
    6310767.8620874295
   ],
   "end_xy": [
    1062362.6141345336,
    6310749.414825688
   ]
  },
  "min_50m": {
   "gradient_pct": 3.343586155145317,
   "start_distance_m": 34.0,
   "end_distance_m": 84.0,
   "midpoint_distance_m": 59.0,
   "start_elevation_m": 371.3124479327336,
   "end_elevation_m": 372.9842410103063,
   "start_xy": [
    1062364.1187053907,
    6310767.8620874295
   ],
   "end_xy": [
    1062354.7242274785,
    6310728.353157467
   ]
  },
  "min_100m": {
   "gradient_pct": 7.443922225610265,
   "start_distance_m": 33.0,
   "end_distance_m": 133.0,
   "midpoint_distance_m": 83.0,
   "start_elevation_m": 371.25100048112284,
   "end_elevation_m": 378.6949227067331,
   "start_xy": [
    1062363.2199955173,
    6310767.423543745
   ],
   "end_xy": [
    1062377.157626966,
    6310768.937260815
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.99360409322219,
   "start_distance_m": 20.0,
   "end_distance_m": 22.0,
   "midpoint_distance_m": 21.0,
   "start_elevation_m": 367.41714857722377,
   "end_elevation_m": 368.1770206590882,
   "start_xy": [
    1062355.8903241912,
    6310757.039117835
   ],
   "end_xy": [
    1062357.410765952,
    6310758.338447222
   ]
  },
  "max_3m": {
   "gradient_pct": 36.29176267560297,
   "start_distance_m": 20.0,
   "end_distance_m": 23.0,
   "midpoint_distance_m": 21.5,
   "start_elevation_m": 367.41714857722377,
   "end_elevation_m": 368.50590145749186,
   "start_xy": [
    1062355.8903241912,
    6310757.039117835
   ],
   "end_xy": [
    1062358.1709868324,
    6310758.988111914
   ]
  }
 },
 "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": 0.355,
   "obstruction_max_height_m": 17.59,
   "flagged_windows_m": [
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "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_E1062-N6310_0m5.tif"
  ],
  "calculated_at": "2026-09-17T03:09:41+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps4",
  "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": [
   "E1062-N6310"
  ],
  "elevation_blocks": [
   "21LHD8SP@2025-06-20"
  ],
  "ign_dalles": [
   "LHD_FXX_1062_6311_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8SP"
  ],
  "ign_editions": [
   "2025-06-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1062_6311_MNT_O_0M50_LAMB93_IGN69": "2025-06-20"
  },
  "route_cut_m": 299.8,
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 17,
   "stations_resolved": 17,
   "width_median_m": 2.75,
   "width_p10_m": 1.9,
   "width_min_m": 0.5,
   "width_max_m": 5.0,
   "bounded_share": 0.765,
   "unbounded_share": 0.235,
   "confidence_median": 0.709,
   "width_median_bounded_m": 3.0,
   "window_m": [
    5.0,
    30.0
   ],
   "width_at_max25_m": 2.0,
   "window_stations": 6,
   "single_track": true,
   "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": 17,
    "stations_resolved": 17,
    "width_median_m": 2.25,
    "width_p10_m": 0.8,
    "width_min_m": 0.5,
    "width_max_m": 8.5,
    "bounded_share": 0.941,
    "unbounded_share": 0.059,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.25,
    "window_m": [
     5.0,
     30.0
    ],
    "width_at_max25_m": 2.62,
    "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": "Castellar",
  "county": "Alpes-Maritimes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}