{
 "ocl_version": "0.1.0",
 "name": "Chemin de la Ville",
 "slug": "chemin-de-la-ville",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.36635493411586,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 750.0,
   "end_distance_m": 752.0,
   "start_elevation_m": 372.9361572414041,
   "end_elevation_m": 373.6234843400864,
   "min_gradient_pct": -8.781629727803875,
   "suppressed_max_gradient_pct": 48.37053388565096,
   "suppressed_location_m": [
    779.0,
    781.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.608730633679063,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 821.0,
   "end_distance_m": 824.0,
   "start_elevation_m": 381.71411193464985,
   "end_elevation_m": 382.5123738536602,
   "min_gradient_pct": -8.535709008430103,
   "suppressed_max_gradient_pct": 37.919671214189066,
   "suppressed_location_m": [
    778.0,
    781.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.53829536476269,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 820.0,
   "end_distance_m": 825.0,
   "start_elevation_m": 381.5229513038517,
   "end_elevation_m": 382.69986607208983,
   "min_gradient_pct": -8.033837186978872,
   "suppressed_max_gradient_pct": 29.316923958988355,
   "suppressed_location_m": [
    777.0,
    782.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.52490918334047,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1185.0,
   "end_distance_m": 1195.0,
   "start_elevation_m": 421.10429323014375,
   "end_elevation_m": 423.3567841484778,
   "min_gradient_pct": -6.342510372492143
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.795413255819085,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1183.0,
   "end_distance_m": 1203.0,
   "start_elevation_m": 420.6662213508298,
   "end_elevation_m": 425.0253040019936,
   "min_gradient_pct": -4.765188337813413
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.617447719778966,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1183.0,
   "end_distance_m": 1208.0,
   "start_elevation_m": 420.6662213508298,
   "end_elevation_m": 426.07058328077454,
   "min_gradient_pct": -3.657332337211301
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.417208666192323,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1188.0,
   "end_distance_m": 1238.0,
   "start_elevation_m": 421.7573608628298,
   "end_elevation_m": 431.96596519592595,
   "min_gradient_pct": -0.26048443198192217
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.63129435538434,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1140.0,
   "end_distance_m": 1240.0,
   "start_elevation_m": 412.7513340448283,
   "end_elevation_m": 432.38262840021264,
   "min_gradient_pct": 1.9161865369516136
  }
 ],
 "shape": {
  "ascent_concentration": 0.307,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 238.0,
  "shape_class": "sustained"
 },
 "length_m": 1240.4741824439354,
 "start_elevation_m": 289.1345919049097,
 "end_elevation_m": 432.47732189942724,
 "endpoint_gain_m": 143.34272999451753,
 "overall_gradient_pct": 11.555478705095586,
 "accumulated_ascent_m": 144.86108534371607,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.53829536476269,
   "start_distance_m": 820.0,
   "end_distance_m": 825.0,
   "midpoint_distance_m": 822.5,
   "start_elevation_m": 381.5229513038517,
   "end_elevation_m": 382.69986607208983,
   "start_xy": [
    918166.1178686405,
    6462298.3105697045
   ],
   "end_xy": [
    918166.2674429577,
    6462303.308331956
   ]
  },
  "max_10m": {
   "gradient_pct": 22.52490918334047,
   "start_distance_m": 1185.0,
   "end_distance_m": 1195.0,
   "midpoint_distance_m": 1190.0,
   "start_elevation_m": 421.10429323014375,
   "end_elevation_m": 423.3567841484778,
   "start_xy": [
    917896.2323384675,
    6462349.327138417
   ],
   "end_xy": [
    917888.9601565411,
    6462356.191202085
   ]
  },
  "max_20m": {
   "gradient_pct": 21.795413255819085,
   "start_distance_m": 1183.0,
   "end_distance_m": 1203.0,
   "midpoint_distance_m": 1193.0,
   "start_elevation_m": 420.6662213508298,
   "end_elevation_m": 425.0253040019936,
   "start_xy": [
    917897.6867748528,
    6462347.954325684
   ],
   "end_xy": [
    917882.64547424,
    6462361.088465734
   ]
  },
  "max_25m": {
   "gradient_pct": 21.617447719778966,
   "start_distance_m": 1183.0,
   "end_distance_m": 1208.0,
   "midpoint_distance_m": 1195.5,
   "start_elevation_m": 420.6662213508298,
   "end_elevation_m": 426.07058328077454,
   "start_xy": [
    917897.6867748528,
    6462347.954325684
   ],
   "end_xy": [
    917878.5299769533,
    6462363.925485103
   ]
  },
  "max_50m": {
   "gradient_pct": 20.417208666192323,
   "start_distance_m": 1188.0,
   "end_distance_m": 1238.0,
   "midpoint_distance_m": 1213.0,
   "start_elevation_m": 421.7573608628298,
   "end_elevation_m": 431.96596519592595,
   "start_xy": [
    917894.0506838895,
    6462351.386357518
   ],
   "end_xy": [
    917853.831533005,
    6462380.952749168
   ]
  },
  "max_100m": {
   "gradient_pct": 19.63129435538434,
   "start_distance_m": 1140.0,
   "end_distance_m": 1240.0,
   "midpoint_distance_m": 1190.0,
   "start_elevation_m": 412.7513340448283,
   "end_elevation_m": 432.38262840021264,
   "start_xy": [
    917917.6942898228,
    6462310.245832576
   ],
   "end_xy": [
    917852.1893477167,
    6462382.094339058
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.033837186978872,
   "start_distance_m": 994.0,
   "end_distance_m": 999.0,
   "midpoint_distance_m": 996.5,
   "start_elevation_m": 389.9124439738374,
   "end_elevation_m": 389.51075211448847,
   "start_xy": [
    918035.7689487325,
    6462240.144476056
   ],
   "end_xy": [
    918031.7555774815,
    6462237.16238766
   ]
  },
  "min_10m": {
   "gradient_pct": -6.342510372492143,
   "start_distance_m": 992.0,
   "end_distance_m": 1002.0,
   "midpoint_distance_m": 997.0,
   "start_elevation_m": 390.01219003261167,
   "end_elevation_m": 389.37793899536246,
   "start_xy": [
    918037.3742972328,
    6462241.337311414
   ],
   "end_xy": [
    918029.3487430726,
    6462235.371537514
   ]
  },
  "min_20m": {
   "gradient_pct": -4.765188337813413,
   "start_distance_m": 983.0,
   "end_distance_m": 1003.0,
   "midpoint_distance_m": 993.0,
   "start_elevation_m": 390.30685548868615,
   "end_elevation_m": 389.35381782112347,
   "start_xy": [
    918044.5983654845,
    6462246.705070527
   ],
   "end_xy": [
    918028.5468529525,
    6462234.774065979
   ]
  },
  "min_25m": {
   "gradient_pct": -3.657332337211301,
   "start_distance_m": 979.0,
   "end_distance_m": 1004.0,
   "midpoint_distance_m": 991.5,
   "start_elevation_m": 390.27128197105253,
   "end_elevation_m": 389.3569488867497,
   "start_xy": [
    918047.8090624854,
    6462249.090741244
   ],
   "end_xy": [
    918027.7449628322,
    6462234.176594444
   ]
  },
  "min_50m": {
   "gradient_pct": -0.26048443198192217,
   "start_distance_m": 954.0,
   "end_distance_m": 1004.0,
   "midpoint_distance_m": 979.0,
   "start_elevation_m": 389.48719110274067,
   "end_elevation_m": 389.3569488867497,
   "start_xy": [
    918067.3884941434,
    6462264.618648848
   ],
   "end_xy": [
    918027.7449628322,
    6462234.176594444
   ]
  },
  "min_100m": {
   "gradient_pct": 1.9161865369516136,
   "start_distance_m": 904.0,
   "end_distance_m": 1004.0,
   "midpoint_distance_m": 954.0,
   "start_elevation_m": 387.4407623497981,
   "end_elevation_m": 389.3569488867497,
   "start_xy": [
    918106.8536672218,
    6462295.2214879785
   ],
   "end_xy": [
    918027.7449628322,
    6462234.176594444
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.36635493411586,
   "start_distance_m": 750.0,
   "end_distance_m": 752.0,
   "midpoint_distance_m": 751.0,
   "start_elevation_m": 372.9361572414041,
   "end_elevation_m": 373.6234843400864,
   "start_xy": [
    918171.2436911621,
    6462232.196011566
   ],
   "end_xy": [
    918170.2151743323,
    6462233.911282137
   ]
  },
  "max_3m": {
   "gradient_pct": 26.608730633679063,
   "start_distance_m": 821.0,
   "end_distance_m": 824.0,
   "midpoint_distance_m": 822.5,
   "start_elevation_m": 381.71411193464985,
   "end_elevation_m": 382.5123738536602,
   "start_xy": [
    918166.1477835039,
    6462299.310122155
   ],
   "end_xy": [
    918166.2375280942,
    6462302.308779506
   ]
  }
 },
 "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": {
  "texture_suppression": {
   "masked_fraction": 0.008,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 5.0,
     "start_m": 777.0,
     "end_m": 782.0,
     "raw_pct": 29.32,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.221,
   "obstruction_max_height_m": 24.43,
   "flagged_windows_m": [
    2,
    3,
    5
   ]
  },
  "excluded_ranges_m": [
   [
    775.0,
    784.0
   ]
  ],
  "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_E917-N6462_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E918-N6461_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E918-N6462_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:07:38+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps2",
  "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": [
   "E917-N6462",
   "E918-N6461",
   "E918-N6462"
  ],
  "elevation_blocks": [
   "21LHD6PM@2025-03-25"
  ],
  "ign_dalles": [
   "LHD_FXX_0917_6463_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0918_6462_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0918_6463_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6PM"
  ],
  "ign_editions": [
   "2025-03-25"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0917_6463_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0918_6462_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0918_6463_MNT_O_0M50_LAMB93_IGN69": "2025-03-25"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 9,
  "carriageway": {
   "stations": 56,
   "stations_resolved": 56,
   "width_median_m": 5.62,
   "width_p10_m": 3.12,
   "width_min_m": 1.5,
   "width_max_m": 12.0,
   "bounded_share": 0.268,
   "unbounded_share": 0.732,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.75,
   "window_m": [
    1183.0,
    1208.0
   ],
   "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": 56,
    "stations_resolved": 56,
    "width_median_m": 3.75,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.696,
    "unbounded_share": 0.304,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.0,
    "window_m": [
     1183.0,
     1208.0
    ],
    "width_at_max25_m": 9.25,
    "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": "Meylan",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}