{
 "ocl_version": "0.1.0",
 "name": "Chemin de Chardonney",
 "slug": "chemin-de-chardonney-3",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.565918356825932,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 739.0,
   "end_distance_m": 741.0,
   "start_elevation_m": 1063.5603209362644,
   "end_elevation_m": 1064.0316393034009,
   "min_gradient_pct": -1.6454247861759086
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.290174279137926,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1886.0,
   "end_distance_m": 1889.0,
   "start_elevation_m": 1188.6394842723691,
   "end_elevation_m": 1189.3381895007433,
   "min_gradient_pct": -0.9062454223756807
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.782631697997203,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 738.0,
   "end_distance_m": 743.0,
   "start_elevation_m": 1063.3496683445126,
   "end_elevation_m": 1064.4387999294124,
   "min_gradient_pct": -0.7346652695832745
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.347126572929938,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 731.0,
   "end_distance_m": 741.0,
   "start_elevation_m": 1061.8969266461079,
   "end_elevation_m": 1064.0316393034009,
   "min_gradient_pct": 0.29363495381971916
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.077377044856576,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 723.0,
   "end_distance_m": 743.0,
   "start_elevation_m": 1060.223324520441,
   "end_elevation_m": 1064.4387999294124,
   "min_gradient_pct": 1.0696357332096795
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.983430641995255,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 725.0,
   "end_distance_m": 750.0,
   "start_elevation_m": 1060.62538935795,
   "end_elevation_m": 1065.871247018449,
   "min_gradient_pct": 1.1073020441499466
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.056203135113265,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 705.0,
   "end_distance_m": 755.0,
   "start_elevation_m": 1056.8468490989098,
   "end_elevation_m": 1066.8749506664665,
   "min_gradient_pct": 1.4393971528734255
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.177960629124073,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 665.0,
   "end_distance_m": 765.0,
   "start_elevation_m": 1049.4985759919814,
   "end_elevation_m": 1068.6765366211055,
   "min_gradient_pct": 1.9848773657826086
  }
 ],
 "shape": {
  "ascent_concentration": 0.353,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 506.0,
  "shape_class": "sustained"
 },
 "length_m": 2153.5000000001137,
 "start_elevation_m": 990.6508636708928,
 "end_elevation_m": 1213.374590042195,
 "endpoint_gain_m": 222.72372637130218,
 "overall_gradient_pct": 10.342406611158134,
 "accumulated_ascent_m": 223.50462798678745,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.782631697997203,
   "start_distance_m": 738.0,
   "end_distance_m": 743.0,
   "midpoint_distance_m": 740.5,
   "start_elevation_m": 1063.3496683445126,
   "end_elevation_m": 1064.4387999294124,
   "start_xy": [
    2590492.2072295425,
    1114840.370948658
   ],
   "end_xy": [
    2590496.3043053793,
    1114837.5100409666
   ]
  },
  "max_10m": {
   "gradient_pct": 21.347126572929938,
   "start_distance_m": 731.0,
   "end_distance_m": 741.0,
   "midpoint_distance_m": 736.0,
   "start_elevation_m": 1061.8969266461079,
   "end_elevation_m": 1064.0316393034009,
   "start_xy": [
    2590486.869368689,
    1114844.8975368438
   ],
   "end_xy": [
    2590494.646069702,
    1114838.6281833132
   ]
  },
  "max_20m": {
   "gradient_pct": 21.077377044856576,
   "start_distance_m": 723.0,
   "end_distance_m": 743.0,
   "midpoint_distance_m": 733.0,
   "start_elevation_m": 1060.223324520441,
   "end_elevation_m": 1064.4387999294124,
   "start_xy": [
    2590481.5788984816,
    1114850.87096125
   ],
   "end_xy": [
    2590496.3043053793,
    1114837.5100409666
   ]
  },
  "max_25m": {
   "gradient_pct": 20.983430641995255,
   "start_distance_m": 725.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 737.5,
   "start_elevation_m": 1060.62538935795,
   "end_elevation_m": 1065.871247018449,
   "start_xy": [
    2590482.757147654,
    1114849.2549570824
   ],
   "end_xy": [
    2590502.313775423,
    1114833.9265282443
   ]
  },
  "max_50m": {
   "gradient_pct": 20.056203135113265,
   "start_distance_m": 705.0,
   "end_distance_m": 755.0,
   "midpoint_distance_m": 730.0,
   "start_elevation_m": 1056.8468490989098,
   "end_elevation_m": 1066.8749506664665,
   "start_xy": [
    2590472.739094299,
    1114866.531127676
   ],
   "end_xy": [
    2590506.754913421,
    1114831.6295115184
   ]
  },
  "max_100m": {
   "gradient_pct": 19.177960629124073,
   "start_distance_m": 665.0,
   "end_distance_m": 765.0,
   "midpoint_distance_m": 715.0,
   "start_elevation_m": 1049.4985759919814,
   "end_elevation_m": 1068.6765366211055,
   "start_xy": [
    2590447.2532272195,
    1114897.3366414516
   ],
   "end_xy": [
    2590515.846570933,
    1114827.477062548
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.7346652695832745,
   "start_distance_m": 241.0,
   "end_distance_m": 246.0,
   "midpoint_distance_m": 243.5,
   "start_elevation_m": 1003.4282657183753,
   "end_elevation_m": 1003.3915324548962,
   "start_xy": [
    2590281.776422265,
    1115186.1023971958
   ],
   "end_xy": [
    2590278.7195934067,
    1115182.146148708
   ]
  },
  "min_10m": {
   "gradient_pct": 0.29363495381971916,
   "start_distance_m": 239.0,
   "end_distance_m": 249.0,
   "midpoint_distance_m": 244.0,
   "start_elevation_m": 1003.414887980378,
   "end_elevation_m": 1003.44425147576,
   "start_xy": [
    2590282.8884367067,
    1115187.7646852974
   ],
   "end_xy": [
    2590276.8714777986,
    1115179.78300082
   ]
  },
  "min_20m": {
   "gradient_pct": 1.0696357332096795,
   "start_distance_m": 2074.0,
   "end_distance_m": 2094.0,
   "midpoint_distance_m": 2084.0,
   "start_elevation_m": 1209.8041462566835,
   "end_elevation_m": 1210.0180734033254,
   "start_xy": [
    2590756.5785540515,
    1113735.4798952108
   ],
   "end_xy": [
    2590756.5775728356,
    1113715.5160855353
   ]
  },
  "min_25m": {
   "gradient_pct": 1.1073020441499466,
   "start_distance_m": 2071.0,
   "end_distance_m": 2096.0,
   "midpoint_distance_m": 2083.5,
   "start_elevation_m": 1209.7603614259083,
   "end_elevation_m": 1210.0371869369458,
   "start_xy": [
    2590756.9434363265,
    1113738.453448854
   ],
   "end_xy": [
    2590756.6525743483,
    1113713.5174925975
   ]
  },
  "min_50m": {
   "gradient_pct": 1.4393971528734255,
   "start_distance_m": 2062.0,
   "end_distance_m": 2112.0,
   "midpoint_distance_m": 2087.0,
   "start_elevation_m": 1209.6215574384596,
   "end_elevation_m": 1210.3412560148963,
   "start_xy": [
    2590759.7276770724,
    1113746.9974335467
   ],
   "end_xy": [
    2590756.298260709,
    1113697.5635868867
   ]
  },
  "min_100m": {
   "gradient_pct": 1.9848773657826086,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 990.6508636708928,
   "end_elevation_m": 992.6357410366754,
   "start_xy": [
    2590344.038,
    1115187.793
   ],
   "end_xy": [
    2590341.5452140407,
    1115273.8900883151
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.565918356825932,
   "start_distance_m": 739.0,
   "end_distance_m": 741.0,
   "midpoint_distance_m": 740.0,
   "start_elevation_m": 1063.5603209362644,
   "end_elevation_m": 1064.0316393034009,
   "start_xy": [
    2590492.988631713,
    1114839.747513131
   ],
   "end_xy": [
    2590494.646069702,
    1114838.6281833132
   ]
  },
  "max_3m": {
   "gradient_pct": 23.290174279137926,
   "start_distance_m": 1886.0,
   "end_distance_m": 1889.0,
   "midpoint_distance_m": 1887.5,
   "start_elevation_m": 1188.6394842723691,
   "end_elevation_m": 1189.3381895007433,
   "start_xy": [
    2590808.794713557,
    1113891.1528965198
   ],
   "end_xy": [
    2590811.7905406496,
    1113891.2408947044
   ]
  }
 },
 "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": {
  "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:2056",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
   "data/cache/ch/swissalti3d_2024_2590-1113_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2024_2590-1114_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2024_2590-1115_0.5_2056_5728.tif"
  ],
  "calculated_at": "2026-09-15T21:30:26+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/switzerland-2026-09-10.osm.pbf",
  "osm_snapshot": "2026-09-09T20:21:20Z",
  "run_id": "retro-260915-dogleg-all",
  "elevation_provider": "swisstopo swissALTI3D",
  "elevation_licence": "swisstopo open government data (OGD): free use, attribution '\u00a9 swisstopo' \u2014 https://www.swisstopo.admin.ch/en/terms-and-conditions",
  "elevation_dataset": "swissALTI3D 0.5 m DTM (Federal Office of Topography swisstopo)",
  "elevation_tile_ids": [
   "2590-1113",
   "2590-1114",
   "2590-1115"
  ],
  "route_cut_m": 2153.5,
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Nendaz",
  "county": "Valais/Wallis",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}