{
 "ocl_version": "0.1.0",
 "name": "Rue du 8 Mai 1945",
 "slug": "rue-du-8-mai-1945-3",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.80347468768116,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 117.0,
   "end_distance_m": 119.0,
   "start_elevation_m": 260.70894392285186,
   "end_elevation_m": 261.2050134166055,
   "min_gradient_pct": -5.140241846594051
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.55154126352757,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 180.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 273.9387632698769,
   "end_elevation_m": 274.67530950778274,
   "min_gradient_pct": -3.4214643388755426
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.340535724928714,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 179.0,
   "end_distance_m": 184.0,
   "start_elevation_m": 273.6982040813598,
   "end_elevation_m": 274.9152308676062,
   "min_gradient_pct": -2.4626174933359835
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.833025256614064,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 164.0,
   "end_distance_m": 174.0,
   "start_elevation_m": 270.1696598032694,
   "end_elevation_m": 272.5529623289308,
   "min_gradient_pct": -0.7870020259738908
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.727855321684217,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 164.0,
   "end_distance_m": 184.0,
   "start_elevation_m": 270.1696598032694,
   "end_elevation_m": 274.9152308676062,
   "min_gradient_pct": 0.5954898780132112
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.666157005911145,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 159.0,
   "end_distance_m": 184.0,
   "start_elevation_m": 268.99869161612844,
   "end_elevation_m": 274.9152308676062,
   "min_gradient_pct": 0.9113533433423981
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.661601490573958,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 148.0,
   "end_distance_m": 198.0,
   "start_elevation_m": 266.55618270708703,
   "end_elevation_m": 277.886983452374,
   "min_gradient_pct": 1.2484734457341347
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.991833899246103,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 117.0,
   "end_distance_m": 217.0,
   "start_elevation_m": 260.70894392285186,
   "end_elevation_m": 281.70077782209796,
   "min_gradient_pct": 1.5841360665016282
  }
 ],
 "shape": {
  "ascent_concentration": 0.601,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 150.0,
  "shape_class": "stepped"
 },
 "length_m": 430.0629503956303,
 "start_elevation_m": 253.67639692993032,
 "end_elevation_m": 290.60300110840626,
 "endpoint_gain_m": 36.92660417847594,
 "overall_gradient_pct": 8.586325361090937,
 "accumulated_ascent_m": 37.225299913180976,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.340535724928714,
   "start_distance_m": 179.0,
   "end_distance_m": 184.0,
   "midpoint_distance_m": 181.5,
   "start_elevation_m": 273.6982040813598,
   "end_elevation_m": 274.9152308676062,
   "start_xy": [
    908379.6908196777,
    6496097.593415728
   ],
   "end_xy": [
    908374.772438675,
    6496098.48086479
   ]
  },
  "max_10m": {
   "gradient_pct": 23.833025256614064,
   "start_distance_m": 164.0,
   "end_distance_m": 174.0,
   "midpoint_distance_m": 169.0,
   "start_elevation_m": 270.1696598032694,
   "end_elevation_m": 272.5529623289308,
   "start_xy": [
    908394.5403251713,
    6496095.4739378225
   ],
   "end_xy": [
    908384.6406548423,
    6496096.886923093
   ]
  },
  "max_20m": {
   "gradient_pct": 23.727855321684217,
   "start_distance_m": 164.0,
   "end_distance_m": 184.0,
   "midpoint_distance_m": 174.0,
   "start_elevation_m": 270.1696598032694,
   "end_elevation_m": 274.9152308676062,
   "start_xy": [
    908394.5403251713,
    6496095.4739378225
   ],
   "end_xy": [
    908374.772438675,
    6496098.48086479
   ]
  },
  "max_25m": {
   "gradient_pct": 23.666157005911145,
   "start_distance_m": 159.0,
   "end_distance_m": 184.0,
   "midpoint_distance_m": 171.5,
   "start_elevation_m": 268.99869161612844,
   "end_elevation_m": 274.9152308676062,
   "start_xy": [
    908399.4901603359,
    6496094.767445188
   ],
   "end_xy": [
    908374.772438675,
    6496098.48086479
   ]
  },
  "max_50m": {
   "gradient_pct": 22.661601490573958,
   "start_distance_m": 148.0,
   "end_distance_m": 198.0,
   "midpoint_distance_m": 173.0,
   "start_elevation_m": 266.55618270708703,
   "end_elevation_m": 277.886983452374,
   "start_xy": [
    908410.379797698,
    6496093.21316139
   ],
   "end_xy": [
    908361.0583097923,
    6496101.295588397
   ]
  },
  "max_100m": {
   "gradient_pct": 20.991833899246103,
   "start_distance_m": 117.0,
   "end_distance_m": 217.0,
   "midpoint_distance_m": 167.0,
   "start_elevation_m": 260.70894392285186,
   "end_elevation_m": 281.70077782209796,
   "start_xy": [
    908441.0687757184,
    6496088.832907053
   ],
   "end_xy": [
    908342.4462777372,
    6496105.115570437
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.4626174933359835,
   "start_distance_m": 2.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 253.69622911557724,
   "end_elevation_m": 253.57309824091044,
   "start_xy": [
    908542.6029449216,
    6496126.810472565
   ],
   "end_xy": [
    908538.2578072255,
    6496124.336653978
   ]
  },
  "min_10m": {
   "gradient_pct": -0.7870020259738908,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 253.67639692993032,
   "end_elevation_m": 253.59769672733293,
   "start_xy": [
    908544.341,
    6496127.8
   ],
   "end_xy": [
    908535.6507246079,
    6496122.852362826
   ]
  },
  "min_20m": {
   "gradient_pct": 0.5954898780132112,
   "start_distance_m": 1.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 253.7147274322669,
   "end_elevation_m": 253.83382540786954,
   "start_xy": [
    908543.4719724607,
    6496127.305236283
   ],
   "end_xy": [
    908526.0914216765,
    6496117.409961934
   ]
  },
  "min_25m": {
   "gradient_pct": 0.9113533433423981,
   "start_distance_m": 1.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 13.5,
   "start_elevation_m": 253.7147274322669,
   "end_elevation_m": 253.9425657681025,
   "start_xy": [
    908543.4719724607,
    6496127.305236283
   ],
   "end_xy": [
    908521.7462839803,
    6496114.936143347
   ]
  },
  "min_50m": {
   "gradient_pct": 1.2484734457341347,
   "start_distance_m": 307.0,
   "end_distance_m": 357.0,
   "midpoint_distance_m": 332.0,
   "start_elevation_m": 288.20105605822926,
   "end_elevation_m": 288.8252927810963,
   "start_xy": [
    908259.3182742529,
    6496139.014354693
   ],
   "end_xy": [
    908213.9419328935,
    6496160.007487726
   ]
  },
  "min_100m": {
   "gradient_pct": 1.5841360665016282,
   "start_distance_m": 300.0,
   "end_distance_m": 400.0,
   "midpoint_distance_m": 350.0,
   "start_elevation_m": 288.0538376334027,
   "end_elevation_m": 289.6379736999043,
   "start_xy": [
    908265.709470507,
    6496136.1590770455
   ],
   "end_xy": [
    908195.8619103977,
    6496188.709129422
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.80347468768116,
   "start_distance_m": 117.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 118.0,
   "start_elevation_m": 260.70894392285186,
   "end_elevation_m": 261.2050134166055,
   "start_xy": [
    908441.0687757184,
    6496088.832907053
   ],
   "end_xy": [
    908439.0888416526,
    6496089.1155041065
   ]
  },
  "max_3m": {
   "gradient_pct": 24.55154126352757,
   "start_distance_m": 180.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 181.5,
   "start_elevation_m": 273.9387632698769,
   "end_elevation_m": 274.67530950778274,
   "start_xy": [
    908378.7008526447,
    6496097.734714255
   ],
   "end_xy": [
    908375.7520193094,
    6496098.279813103
   ]
  }
 },
 "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": 0.197,
   "obstruction_max_height_m": 30.66,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": []
 },
 "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_E908-N6496_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:37:22+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": [
   "E908-N6496"
  ],
  "elevation_blocks": [
   "21LHD6PL@2025-03-07"
  ],
  "ign_dalles": [
   "LHD_FXX_0908_6497_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6PL"
  ],
  "ign_editions": [
   "2025-03-07"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0908_6497_MNT_O_0M50_LAMB93_IGN69": "2025-03-07"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 24,
   "stations_resolved": 24,
   "width_median_m": 6.75,
   "width_p10_m": 4.83,
   "width_min_m": 4.0,
   "width_max_m": 12.0,
   "bounded_share": 0.167,
   "unbounded_share": 0.833,
   "confidence_median": 0.0,
   "width_median_bounded_m": 6.5,
   "window_m": [
    159.0,
    184.0
   ],
   "width_at_max25_m": 6.75,
   "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": 24,
    "stations_resolved": 24,
    "width_median_m": 4.38,
    "width_p10_m": 0.65,
    "width_min_m": 0.0,
    "width_max_m": 12.0,
    "bounded_share": 0.792,
    "unbounded_share": 0.208,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.5,
    "window_m": [
     159.0,
     184.0
    ],
    "width_at_max25_m": 1.0,
    "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": "Le Pont-de-Beauvoisin",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}