{
 "ocl_version": "0.1.0",
 "name": "Chemin Romain",
 "slug": "chemin-romain",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.152258725602337,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 66.0,
   "end_distance_m": 68.0,
   "start_elevation_m": 188.17665521977688,
   "end_elevation_m": 188.63970039428892,
   "min_gradient_pct": -6.151771855043364
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.709699596863175,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 65.0,
   "end_distance_m": 68.0,
   "start_elevation_m": 187.98840940638303,
   "end_elevation_m": 188.63970039428892,
   "min_gradient_pct": -5.120845540257808
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.621531298417835,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 63.0,
   "end_distance_m": 68.0,
   "start_elevation_m": 187.55862382936803,
   "end_elevation_m": 188.63970039428892,
   "min_gradient_pct": -3.6132100754718977
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.033613670055615,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 58.0,
   "end_distance_m": 68.0,
   "start_elevation_m": 186.53633902728336,
   "end_elevation_m": 188.63970039428892,
   "min_gradient_pct": 1.0552965067554965
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.31573391295609,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 58.0,
   "end_distance_m": 78.0,
   "start_elevation_m": 186.53633902728336,
   "end_elevation_m": 190.59948580987458,
   "min_gradient_pct": 6.225901111534
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.276031357006218,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 57.0,
   "end_distance_m": 82.0,
   "start_elevation_m": 186.33750777455447,
   "end_elevation_m": 191.40651561380602,
   "min_gradient_pct": 7.554076919320778
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.92320322495368,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 38.0,
   "end_distance_m": 88.0,
   "start_elevation_m": 182.65252037834455,
   "end_elevation_m": 192.6141219908214,
   "min_gradient_pct": 10.711680585148372
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.38999490277189,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "start_elevation_m": 176.1572423664357,
   "end_elevation_m": 194.54723726920759,
   "min_gradient_pct": 11.788977164746283
  }
 ],
 "shape": {
  "ascent_concentration": 0.337,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 124.0,
  "shape_class": "sustained"
 },
 "length_m": 233.40504152894735,
 "start_elevation_m": 176.1572423664357,
 "end_elevation_m": 209.95993020388465,
 "endpoint_gain_m": 33.80268783744896,
 "overall_gradient_pct": 14.482415467986659,
 "accumulated_ascent_m": 34.007057827095764,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.621531298417835,
   "start_distance_m": 63.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 65.5,
   "start_elevation_m": 187.55862382936803,
   "end_elevation_m": 188.63970039428892,
   "start_xy": [
    1054412.5637254368,
    6301787.208784615
   ],
   "end_xy": [
    1054408.9860845986,
    6301790.701704028
   ]
  },
  "max_10m": {
   "gradient_pct": 21.033613670055615,
   "start_distance_m": 58.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 63.0,
   "start_elevation_m": 186.53633902728336,
   "end_elevation_m": 188.63970039428892,
   "start_xy": [
    1054416.1413662753,
    6301783.7158652
   ],
   "end_xy": [
    1054408.9860845986,
    6301790.701704028
   ]
  },
  "max_20m": {
   "gradient_pct": 20.31573391295609,
   "start_distance_m": 58.0,
   "end_distance_m": 78.0,
   "midpoint_distance_m": 68.0,
   "start_elevation_m": 186.53633902728336,
   "end_elevation_m": 190.59948580987458,
   "start_xy": [
    1054416.1413662753,
    6301783.7158652
   ],
   "end_xy": [
    1054401.830802922,
    6301797.687542857
   ]
  },
  "max_25m": {
   "gradient_pct": 20.276031357006218,
   "start_distance_m": 57.0,
   "end_distance_m": 82.0,
   "midpoint_distance_m": 69.5,
   "start_elevation_m": 186.33750777455447,
   "end_elevation_m": 191.40651561380602,
   "start_xy": [
    1054416.8568944428,
    6301783.017281318
   ],
   "end_xy": [
    1054398.9686902512,
    6301800.481878388
   ]
  },
  "max_50m": {
   "gradient_pct": 19.92320322495368,
   "start_distance_m": 38.0,
   "end_distance_m": 88.0,
   "midpoint_distance_m": 63.0,
   "start_elevation_m": 182.65252037834455,
   "end_elevation_m": 192.6141219908214,
   "start_xy": [
    1054430.4519296286,
    6301769.744187545
   ],
   "end_xy": [
    1054394.6755212452,
    6301804.673381684
   ]
  },
  "max_100m": {
   "gradient_pct": 18.38999490277189,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 176.1572423664357,
   "end_elevation_m": 194.54723726920759,
   "start_xy": [
    1054457.642,
    6301743.198
   ],
   "end_xy": [
    1054385.5169654093,
    6301812.395906079
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.6132100754718977,
   "start_distance_m": 228.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 230.5,
   "start_elevation_m": 210.16430019353146,
   "end_elevation_m": 209.98363968975787,
   "start_xy": [
    1054269.3949716648,
    6301865.370853617
   ],
   "end_xy": [
    1054264.4163127257,
    6301864.909382957
   ]
  },
  "min_10m": {
   "gradient_pct": 1.0552965067554965,
   "start_distance_m": 223.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 228.0,
   "start_elevation_m": 209.87811003908232,
   "end_elevation_m": 209.98363968975787,
   "start_xy": [
    1054274.2952019551,
    6301864.499802321
   ],
   "end_xy": [
    1054264.4163127257,
    6301864.909382957
   ]
  },
  "min_20m": {
   "gradient_pct": 6.225901111534,
   "start_distance_m": 213.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 223.0,
   "start_elevation_m": 208.73845946745107,
   "end_elevation_m": 209.98363968975787,
   "start_xy": [
    1054283.608490202,
    6301860.858008529
   ],
   "end_xy": [
    1054264.4163127257,
    6301864.909382957
   ]
  },
  "min_25m": {
   "gradient_pct": 7.554076919320778,
   "start_distance_m": 208.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 220.5,
   "start_elevation_m": 208.09512045992767,
   "end_elevation_m": 209.98363968975787,
   "start_xy": [
    1054288.2651343257,
    6301859.0371116325
   ],
   "end_xy": [
    1054264.4163127257,
    6301864.909382957
   ]
  },
  "min_50m": {
   "gradient_pct": 10.711680585148372,
   "start_distance_m": 108.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 133.0,
   "start_elevation_m": 195.64067870646124,
   "end_elevation_m": 200.99651899903543,
   "start_xy": [
    1054378.737036937,
    6301816.6082879165
   ],
   "end_xy": [
    1054333.2586499935,
    6301837.350619078
   ]
  },
  "min_100m": {
   "gradient_pct": 11.788977164746283,
   "start_distance_m": 133.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 183.0,
   "start_elevation_m": 198.19466252501158,
   "end_elevation_m": 209.98363968975787,
   "start_xy": [
    1054356.159492335,
    6301827.323085979
   ],
   "end_xy": [
    1054264.4163127257,
    6301864.909382957
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.152258725602337,
   "start_distance_m": 66.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 67.0,
   "start_elevation_m": 188.17665521977688,
   "end_elevation_m": 188.63970039428892,
   "start_xy": [
    1054410.417140934,
    6301789.3045362625
   ],
   "end_xy": [
    1054408.9860845986,
    6301790.701704028
   ]
  },
  "max_3m": {
   "gradient_pct": 21.709699596863175,
   "start_distance_m": 65.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 66.5,
   "start_elevation_m": 187.98840940638303,
   "end_elevation_m": 188.63970039428892,
   "start_xy": [
    1054411.1326691015,
    6301788.60595238
   ],
   "end_xy": [
    1054408.9860845986,
    6301790.701704028
   ]
  }
 },
 "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": 0.064,
   "obstruction_max_height_m": 14.33,
   "flagged_windows_m": []
  },
  "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_E1054-N6301_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:35:56+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": [
   "E1054-N6301"
  ],
  "elevation_blocks": [
   "21LHD8SP@2025-06-20"
  ],
  "ign_dalles": [
   "LHD_FXX_1054_6302_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8SP"
  ],
  "ign_editions": [
   "2025-06-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1054_6302_MNT_O_0M50_LAMB93_IGN69": "2025-06-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 16,
   "stations_resolved": 16,
   "width_median_m": 5.38,
   "width_p10_m": 4.62,
   "width_min_m": 4.25,
   "width_max_m": 8.25,
   "bounded_share": 0.562,
   "unbounded_share": 0.438,
   "confidence_median": 0.665,
   "width_median_bounded_m": 5.0,
   "window_m": [
    57.0,
    82.0
   ],
   "width_at_max25_m": 5.25,
   "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": 16,
    "stations_resolved": 16,
    "width_median_m": 4.12,
    "width_p10_m": 2.38,
    "width_min_m": 1.0,
    "width_max_m": 7.25,
    "bounded_share": 0.938,
    "unbounded_share": 0.062,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.0,
    "window_m": [
     57.0,
     82.0
    ],
    "width_at_max25_m": 3.5,
    "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": "Cap-d'Ail",
  "county": "Alpes-Maritimes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}