{
 "ocl_version": "0.1.0",
 "name": "Chemin de la Vieille Fontaine",
 "slug": "chemin-de-la-vieille-fontaine",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.274683715288404,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 146.0,
   "end_distance_m": 148.0,
   "start_elevation_m": 163.57457218558702,
   "end_elevation_m": 164.08006585989278,
   "min_gradient_pct": -4.481154706425627
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.038293319085863,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 152.0,
   "end_distance_m": 155.0,
   "start_elevation_m": 165.04200221311814,
   "end_elevation_m": 165.7931510126907,
   "min_gradient_pct": -1.3350498809254912
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.108719767223988,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 150.0,
   "end_distance_m": 155.0,
   "start_elevation_m": 164.53771502432951,
   "end_elevation_m": 165.7931510126907,
   "min_gradient_pct": -1.1265440170654983
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.60041224317024,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 147.0,
   "end_distance_m": 157.0,
   "start_elevation_m": 163.82152241872797,
   "end_elevation_m": 166.281563643045,
   "min_gradient_pct": -0.8000134219949473
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.175176699202297,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 138.0,
   "end_distance_m": 158.0,
   "start_elevation_m": 161.69469556701245,
   "end_elevation_m": 166.5297309068529,
   "min_gradient_pct": -0.7010135889606772
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.75526524813847,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 135.0,
   "end_distance_m": 160.0,
   "start_elevation_m": 161.0190748914772,
   "end_elevation_m": 166.95789120351182,
   "min_gradient_pct": -0.7000806541594784
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.407266503929236,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 116.0,
   "end_distance_m": 166.0,
   "start_elevation_m": 156.95561584211677,
   "end_elevation_m": 167.6592490940814,
   "min_gradient_pct": 0.0022524991742329803
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.53784770047298,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 317.0,
   "end_distance_m": 417.0,
   "start_elevation_m": 182.83257921876123,
   "end_elevation_m": 200.3704269192342,
   "min_gradient_pct": 0.7608154323645522
  }
 ],
 "shape": {
  "ascent_concentration": 0.401,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 196.0,
  "shape_class": "sustained"
 },
 "length_m": 417.44557787097364,
 "start_elevation_m": 155.42790409276935,
 "end_elevation_m": 200.49894583683138,
 "endpoint_gain_m": 45.07104174406203,
 "overall_gradient_pct": 10.796866497887022,
 "accumulated_ascent_m": 45.39122801828867,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.108719767223988,
   "start_distance_m": 150.0,
   "end_distance_m": 155.0,
   "midpoint_distance_m": 152.5,
   "start_elevation_m": 164.53771502432951,
   "end_elevation_m": 165.7931510126907,
   "start_xy": [
    1022498.8909522567,
    6286558.003145331
   ],
   "end_xy": [
    1022499.8935917587,
    6286553.104705372
   ]
  },
  "max_10m": {
   "gradient_pct": 24.60041224317024,
   "start_distance_m": 147.0,
   "end_distance_m": 157.0,
   "midpoint_distance_m": 152.0,
   "start_elevation_m": 163.82152241872797,
   "end_elevation_m": 166.281563643045,
   "start_xy": [
    1022498.2893685556,
    6286560.942209306
   ],
   "end_xy": [
    1022500.4445439283,
    6286551.182422021
   ]
  },
  "max_20m": {
   "gradient_pct": 24.175176699202297,
   "start_distance_m": 138.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 148.0,
   "start_elevation_m": 161.69469556701245,
   "end_elevation_m": 166.5297309068529,
   "start_xy": [
    1022496.4846174521,
    6286569.759401231
   ],
   "end_xy": [
    1022500.724038325,
    6286550.222274698
   ]
  },
  "max_25m": {
   "gradient_pct": 23.75526524813847,
   "start_distance_m": 135.0,
   "end_distance_m": 160.0,
   "midpoint_distance_m": 147.5,
   "start_elevation_m": 161.0190748914772,
   "end_elevation_m": 166.95789120351182,
   "start_xy": [
    1022495.883033751,
    6286572.698465207
   ],
   "end_xy": [
    1022501.2830271184,
    6286548.301980052
   ]
  },
  "max_50m": {
   "gradient_pct": 21.407266503929236,
   "start_distance_m": 116.0,
   "end_distance_m": 166.0,
   "midpoint_distance_m": 141.0,
   "start_elevation_m": 156.95561584211677,
   "end_elevation_m": 167.6592490940814,
   "start_xy": [
    1022491.9807289883,
    6286591.293324011
   ],
   "end_xy": [
    1022504.392579412,
    6286543.247285611
   ]
  },
  "max_100m": {
   "gradient_pct": 17.53784770047298,
   "start_distance_m": 317.0,
   "end_distance_m": 417.0,
   "midpoint_distance_m": 367.0,
   "start_elevation_m": 182.83257921876123,
   "end_elevation_m": 200.3704269192342,
   "start_xy": [
    1022589.2278268684,
    6286428.678660782
   ],
   "end_xy": [
    1022585.9847873833,
    6286336.291103913
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.1265440170654983,
   "start_distance_m": 63.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 65.5,
   "start_elevation_m": 156.30900619445987,
   "end_elevation_m": 156.2526789936066,
   "start_xy": [
    1022534.3498887512,
    6286617.688833619
   ],
   "end_xy": [
    1022529.6529938823,
    6286616.015762349
   ]
  },
  "min_10m": {
   "gradient_pct": -0.8000134219949473,
   "start_distance_m": 43.0,
   "end_distance_m": 53.0,
   "midpoint_distance_m": 48.0,
   "start_elevation_m": 156.42769915714646,
   "end_elevation_m": 156.34769781494697,
   "start_xy": [
    1022553.937269089,
    6286613.647233503
   ],
   "end_xy": [
    1022544.14357892,
    6286615.668033561
   ]
  },
  "min_20m": {
   "gradient_pct": -0.7010135889606772,
   "start_distance_m": 48.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 58.0,
   "start_elevation_m": 156.39288171139873,
   "end_elevation_m": 156.2526789936066,
   "start_xy": [
    1022549.0404240045,
    6286614.657633532
   ],
   "end_xy": [
    1022529.6529938823,
    6286616.015762349
   ]
  },
  "min_25m": {
   "gradient_pct": -0.7000806541594784,
   "start_distance_m": 43.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 55.5,
   "start_elevation_m": 156.42769915714646,
   "end_elevation_m": 156.2526789936066,
   "start_xy": [
    1022553.937269089,
    6286613.647233503
   ],
   "end_xy": [
    1022529.6529938823,
    6286616.015762349
   ]
  },
  "min_50m": {
   "gradient_pct": 0.0022524991742329803,
   "start_distance_m": 41.0,
   "end_distance_m": 91.0,
   "midpoint_distance_m": 66.0,
   "start_elevation_m": 156.42885395132686,
   "end_elevation_m": 156.42998020091397,
   "start_xy": [
    1022555.8960071228,
    6286613.243073491
   ],
   "end_xy": [
    1022508.0650620724,
    6286608.080952952
   ]
  },
  "min_100m": {
   "gradient_pct": 0.7608154323645522,
   "start_distance_m": 9.0,
   "end_distance_m": 109.0,
   "midpoint_distance_m": 59.0,
   "start_elevation_m": 155.91653794713548,
   "end_elevation_m": 156.67735337950003,
   "start_xy": [
    1022579.0842820382,
    6286630.843469586
   ],
   "end_xy": [
    1022494.8438703755,
    6286597.407551493
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.274683715288404,
   "start_distance_m": 146.0,
   "end_distance_m": 148.0,
   "midpoint_distance_m": 147.0,
   "start_elevation_m": 163.57457218558702,
   "end_elevation_m": 164.08006585989278,
   "start_xy": [
    1022498.0888406553,
    6286561.921897298
   ],
   "end_xy": [
    1022498.489896456,
    6286559.962521314
   ]
  },
  "max_3m": {
   "gradient_pct": 25.038293319085863,
   "start_distance_m": 152.0,
   "end_distance_m": 155.0,
   "midpoint_distance_m": 153.5,
   "start_elevation_m": 165.04200221311814,
   "end_elevation_m": 165.7931510126907,
   "start_xy": [
    1022499.2920080576,
    6286556.0437693475
   ],
   "end_xy": [
    1022499.8935917587,
    6286553.104705372
   ]
  }
 },
 "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": 0.217,
   "obstruction_max_height_m": 16.43,
   "flagged_windows_m": [
    25,
    50
   ]
  },
  "review": [],
  "extent": [
   "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_E1022-N6286_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:10:41+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": [
   "E1022-N6286"
  ],
  "elevation_blocks": [
   "22LHD6RQ@2025-03-13"
  ],
  "ign_dalles": [
   "LHD_FXX_1022_6287_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD6RQ"
  ],
  "ign_editions": [
   "2025-03-13"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1022_6287_MNT_O_0M50_LAMB93_IGN69": "2025-03-13"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 22,
   "stations_resolved": 22,
   "width_median_m": 5.0,
   "width_p10_m": 3.52,
   "width_min_m": 2.5,
   "width_max_m": 11.0,
   "bounded_share": 0.364,
   "unbounded_share": 0.636,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.62,
   "window_m": [
    135.0,
    160.0
   ],
   "width_at_max25_m": 5.5,
   "window_stations": 6,
   "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": 22,
    "stations_resolved": 22,
    "width_median_m": 3.62,
    "width_p10_m": 2.25,
    "width_min_m": 1.25,
    "width_max_m": 10.5,
    "bounded_share": 0.773,
    "unbounded_share": 0.227,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.25,
    "window_m": [
     135.0,
     160.0
    ],
    "width_at_max25_m": 4.12,
    "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": "Mougins",
  "county": "Alpes-Maritimes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}