{
 "ocl_version": "0.1.0",
 "name": "Chemin des Colins",
 "slug": "chemin-des-colins",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 35.639501055641176,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 800.0,
   "end_distance_m": 802.0,
   "start_elevation_m": 548.9133420167904,
   "end_elevation_m": 549.6261320379032,
   "min_gradient_pct": -0.3809189018966208
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 34.15522348198389,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 800.0,
   "end_distance_m": 803.0,
   "start_elevation_m": 548.9133420167904,
   "end_elevation_m": 549.9379987212499,
   "min_gradient_pct": 0.541908344928288
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.927790347641803,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 798.0,
   "end_distance_m": 803.0,
   "start_elevation_m": 548.5416092038678,
   "end_elevation_m": 549.9379987212499,
   "min_gradient_pct": 2.260861960805869
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.698816326677616,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 793.0,
   "end_distance_m": 803.0,
   "start_elevation_m": 547.6681170885821,
   "end_elevation_m": 549.9379987212499,
   "min_gradient_pct": 2.3530956046244
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.540216098605924,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 783.0,
   "end_distance_m": 803.0,
   "start_elevation_m": 545.6299555015287,
   "end_elevation_m": 549.9379987212499,
   "min_gradient_pct": 2.831043729653686
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.720663169157433,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 778.0,
   "end_distance_m": 803.0,
   "start_elevation_m": 544.7578329289605,
   "end_elevation_m": 549.9379987212499,
   "min_gradient_pct": 3.2086116668228897
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.858406308316944,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 753.0,
   "end_distance_m": 803.0,
   "start_elevation_m": 540.5087955670914,
   "end_elevation_m": 549.9379987212499,
   "min_gradient_pct": 4.506554025173614
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.047330060652257,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 703.0,
   "end_distance_m": 803.0,
   "start_elevation_m": 532.8906686605976,
   "end_elevation_m": 549.9379987212499,
   "min_gradient_pct": 5.553512027058218
  }
 ],
 "shape": {
  "ascent_concentration": 0.337,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 181.0,
  "shape_class": "sustained"
 },
 "length_m": 878.5789017152379,
 "start_elevation_m": 462.72513814025683,
 "end_elevation_m": 558.9039866777241,
 "endpoint_gain_m": 96.17884853746727,
 "overall_gradient_pct": 10.947092896232608,
 "accumulated_ascent_m": 96.38544937375718,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.927790347641803,
   "start_distance_m": 798.0,
   "end_distance_m": 803.0,
   "midpoint_distance_m": 800.5,
   "start_elevation_m": 548.5416092038678,
   "end_elevation_m": 549.9379987212499,
   "start_xy": [
    870969.5196594689,
    6391783.846933229
   ],
   "end_xy": [
    870966.1426745873,
    6391787.534204999
   ]
  },
  "max_10m": {
   "gradient_pct": 22.698816326677616,
   "start_distance_m": 793.0,
   "end_distance_m": 803.0,
   "midpoint_distance_m": 798.0,
   "start_elevation_m": 547.6681170885821,
   "end_elevation_m": 549.9379987212499,
   "start_xy": [
    870972.8966443506,
    6391780.159661458
   ],
   "end_xy": [
    870966.1426745873,
    6391787.534204999
   ]
  },
  "max_20m": {
   "gradient_pct": 21.540216098605924,
   "start_distance_m": 783.0,
   "end_distance_m": 803.0,
   "midpoint_distance_m": 793.0,
   "start_elevation_m": 545.6299555015287,
   "end_elevation_m": 549.9379987212499,
   "start_xy": [
    870979.6506141139,
    6391772.785117918
   ],
   "end_xy": [
    870966.1426745873,
    6391787.534204999
   ]
  },
  "max_25m": {
   "gradient_pct": 20.720663169157433,
   "start_distance_m": 778.0,
   "end_distance_m": 803.0,
   "midpoint_distance_m": 790.5,
   "start_elevation_m": 544.7578329289605,
   "end_elevation_m": 549.9379987212499,
   "start_xy": [
    870983.0275989956,
    6391769.097846147
   ],
   "end_xy": [
    870966.1426745873,
    6391787.534204999
   ]
  },
  "max_50m": {
   "gradient_pct": 18.858406308316944,
   "start_distance_m": 753.0,
   "end_distance_m": 803.0,
   "midpoint_distance_m": 778.0,
   "start_elevation_m": 540.5087955670914,
   "end_elevation_m": 549.9379987212499,
   "start_xy": [
    871003.2180118874,
    6391754.519798374
   ],
   "end_xy": [
    870966.1426745873,
    6391787.534204999
   ]
  },
  "max_100m": {
   "gradient_pct": 17.047330060652257,
   "start_distance_m": 703.0,
   "end_distance_m": 803.0,
   "midpoint_distance_m": 753.0,
   "start_elevation_m": 532.8906686605976,
   "end_elevation_m": 549.9379987212499,
   "start_xy": [
    871041.861305644,
    6391724.346674084
   ],
   "end_xy": [
    870966.1426745873,
    6391787.534204999
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 2.260861960805869,
   "start_distance_m": 383.0,
   "end_distance_m": 388.0,
   "midpoint_distance_m": 385.5,
   "start_elevation_m": 499.9011963560205,
   "end_elevation_m": 500.01423945406077,
   "start_xy": [
    871001.1209495886,
    6391574.199279347
   ],
   "end_xy": [
    871002.6043547553,
    6391569.424396195
   ]
  },
  "min_10m": {
   "gradient_pct": 2.3530956046244,
   "start_distance_m": 383.0,
   "end_distance_m": 393.0,
   "midpoint_distance_m": 388.0,
   "start_elevation_m": 499.9011963560205,
   "end_elevation_m": 500.1365059164829,
   "start_xy": [
    871001.1209495886,
    6391574.199279347
   ],
   "end_xy": [
    871004.0877599219,
    6391564.649513044
   ]
  },
  "min_20m": {
   "gradient_pct": 2.831043729653686,
   "start_distance_m": 383.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 393.0,
   "start_elevation_m": 499.9011963560205,
   "end_elevation_m": 500.4674051019512,
   "start_xy": [
    871001.1209495886,
    6391574.199279347
   ],
   "end_xy": [
    871007.0545702552,
    6391555.09974674
   ]
  },
  "min_25m": {
   "gradient_pct": 3.2086116668228897,
   "start_distance_m": 381.0,
   "end_distance_m": 406.0,
   "midpoint_distance_m": 393.5,
   "start_elevation_m": 499.80492316350615,
   "end_elevation_m": 500.60707608021187,
   "start_xy": [
    871000.0029021184,
    6391575.844050646
   ],
   "end_xy": [
    871007.9446133552,
    6391552.23481685
   ]
  },
  "min_50m": {
   "gradient_pct": 4.506554025173614,
   "start_distance_m": 375.0,
   "end_distance_m": 425.0,
   "midpoint_distance_m": 400.0,
   "start_elevation_m": 499.53375617966776,
   "end_elevation_m": 501.78703319225457,
   "start_xy": [
    870996.4451930313,
    6391580.675479633
   ],
   "end_xy": [
    871014.0095165869,
    6391534.229845656
   ]
  },
  "min_100m": {
   "gradient_pct": 5.553512027058218,
   "start_distance_m": 374.0,
   "end_distance_m": 474.0,
   "midpoint_distance_m": 424.0,
   "start_elevation_m": 499.45724517292035,
   "end_elevation_m": 505.01075719997857,
   "start_xy": [
    870995.5553913016,
    6391580.682227894
   ],
   "end_xy": [
    871047.8330198072,
    6391504.672688228
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 35.639501055641176,
   "start_distance_m": 800.0,
   "end_distance_m": 802.0,
   "midpoint_distance_m": 801.0,
   "start_elevation_m": 548.9133420167904,
   "end_elevation_m": 549.6261320379032,
   "start_xy": [
    870968.1688655163,
    6391785.321841937
   ],
   "end_xy": [
    870966.8180715636,
    6391786.796750645
   ]
  },
  "max_3m": {
   "gradient_pct": 34.15522348198389,
   "start_distance_m": 800.0,
   "end_distance_m": 803.0,
   "midpoint_distance_m": 801.5,
   "start_elevation_m": 548.9133420167904,
   "end_elevation_m": 549.9379987212499,
   "start_xy": [
    870968.1688655163,
    6391785.321841937
   ],
   "end_xy": [
    870966.1426745873,
    6391787.534204999
   ]
  }
 },
 "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": 0.114,
   "obstruction_max_height_m": 18.57,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20
   ]
  },
  "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_E870-N6391_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E871-N6391_0m5.tif"
  ],
  "calculated_at": "2026-09-17T03:03:14+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps1",
  "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": [
   "E870-N6391",
   "E871-N6391"
  ],
  "elevation_blocks": [
   "22LHD5ON@2025-08-13"
  ],
  "ign_dalles": [
   "LHD_FXX_0870_6392_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0871_6392_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD5ON"
  ],
  "ign_editions": [
   "2025-08-13"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0870_6392_MNT_O_0M50_LAMB93_IGN69": "2025-08-13",
   "LHD_FXX_0871_6392_MNT_O_0M50_LAMB93_IGN69": "2025-08-13"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 42,
   "stations_resolved": 42,
   "width_median_m": 3.75,
   "width_p10_m": 2.0,
   "width_min_m": 1.5,
   "width_max_m": 8.0,
   "bounded_share": 0.476,
   "unbounded_share": 0.524,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.75,
   "window_m": [
    778.0,
    803.0
   ],
   "width_at_max25_m": 2.5,
   "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": 42,
    "stations_resolved": 42,
    "width_median_m": 5.25,
    "width_p10_m": 1.25,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.881,
    "unbounded_share": 0.119,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.25,
    "window_m": [
     778.0,
     803.0
    ],
    "width_at_max25_m": 1.25,
    "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": "B\u00e9zaudun-sur-B\u00eene",
  "county": "Dr\u00f4me",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}