{
 "ocl_version": "0.1.0",
 "name": "Chemin de Meitreille",
 "slug": "chemin-de-meitreille",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 35.80091999411934,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3409.0,
   "end_distance_m": 3411.0,
   "start_elevation_m": 1694.7428456609352,
   "end_elevation_m": 1695.4588640608176,
   "min_gradient_pct": -19.994150402828836,
   "suppressed_max_gradient_pct": 45.59014614630996,
   "suppressed_location_m": [
    1640.0,
    1642.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.245188033307993,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3409.0,
   "end_distance_m": 3412.0,
   "start_elevation_m": 1694.7428456609352,
   "end_elevation_m": 1695.5902013019345,
   "min_gradient_pct": -10.409777380891683,
   "suppressed_max_gradient_pct": 35.07247611432831,
   "suppressed_location_m": [
    1640.0,
    1643.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.882184970471826,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3409.0,
   "end_distance_m": 3414.0,
   "start_elevation_m": 1694.7428456609352,
   "end_elevation_m": 1695.8869549094588,
   "min_gradient_pct": -5.606760845967074,
   "suppressed_max_gradient_pct": 26.068706624764673,
   "suppressed_location_m": [
    1640.0,
    1645.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.291743729755126,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 3959.0,
   "end_distance_m": 3969.0,
   "start_elevation_m": 1760.021783452145,
   "end_elevation_m": 1762.1509578251205,
   "min_gradient_pct": -5.402247640793121
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.994796626862353,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 3951.0,
   "end_distance_m": 3971.0,
   "start_elevation_m": 1758.3664280508342,
   "end_elevation_m": 1762.5653873762067,
   "min_gradient_pct": -4.926445066403176
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.813976861154515,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 3943.0,
   "end_distance_m": 3968.0,
   "start_elevation_m": 1756.7411373609816,
   "end_elevation_m": 1761.9446315762702,
   "min_gradient_pct": -4.6510460631116075
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.581194696153034,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 3926.0,
   "end_distance_m": 3976.0,
   "start_elevation_m": 1753.2569935074791,
   "end_elevation_m": 1763.5475908555557,
   "min_gradient_pct": -2.7235615868139575
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.267778829128247,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 3918.0,
   "end_distance_m": 4018.0,
   "start_elevation_m": 1751.8112349789535,
   "end_elevation_m": 1771.0790138080818,
   "min_gradient_pct": -1.0052429508352816
  }
 ],
 "shape": {
  "ascent_concentration": 0.314,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 629.0,
  "shape_class": "sustained"
 },
 "length_m": 4257.336724935693,
 "start_elevation_m": 1368.3372959335975,
 "end_elevation_m": 1805.373301375013,
 "endpoint_gain_m": 437.03600544141545,
 "overall_gradient_pct": 10.265478952643026,
 "accumulated_ascent_m": 440.6826653351304,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.882184970471826,
   "start_distance_m": 3409.0,
   "end_distance_m": 3414.0,
   "midpoint_distance_m": 3411.5,
   "start_elevation_m": 1694.7428456609352,
   "end_elevation_m": 1695.8869549094588,
   "start_xy": [
    2578209.6025552684,
    1135124.983494222
   ],
   "end_xy": [
    2578214.583146662,
    1135124.6147707654
   ]
  },
  "max_10m": {
   "gradient_pct": 21.291743729755126,
   "start_distance_m": 3959.0,
   "end_distance_m": 3969.0,
   "midpoint_distance_m": 3964.0,
   "start_elevation_m": 1760.021783452145,
   "end_elevation_m": 1762.1509578251205,
   "start_xy": [
    2578748.657270766,
    1135046.7786038674
   ],
   "end_xy": [
    2578758.565704029,
    1135048.1287706238
   ]
  },
  "max_20m": {
   "gradient_pct": 20.994796626862353,
   "start_distance_m": 3951.0,
   "end_distance_m": 3971.0,
   "midpoint_distance_m": 3961.0,
   "start_elevation_m": 1758.3664280508342,
   "end_elevation_m": 1762.5653873762067,
   "start_xy": [
    2578740.730524156,
    1135045.698470462
   ],
   "end_xy": [
    2578760.5473906817,
    1135048.3988039752
   ]
  },
  "max_25m": {
   "gradient_pct": 20.813976861154515,
   "start_distance_m": 3943.0,
   "end_distance_m": 3968.0,
   "midpoint_distance_m": 3955.5,
   "start_elevation_m": 1756.7411373609816,
   "end_elevation_m": 1761.9446315762702,
   "start_xy": [
    2578732.778929967,
    1135044.9268326766
   ],
   "end_xy": [
    2578757.5748607027,
    1135047.9937539482
   ]
  },
  "max_50m": {
   "gradient_pct": 20.581194696153034,
   "start_distance_m": 3926.0,
   "end_distance_m": 3976.0,
   "midpoint_distance_m": 3951.0,
   "start_elevation_m": 1753.2569935074791,
   "end_elevation_m": 1763.5475908555557,
   "start_xy": [
    2578715.7843753463,
    1135044.496584783
   ],
   "end_xy": [
    2578765.5016073133,
    1135049.0738873535
   ]
  },
  "max_100m": {
   "gradient_pct": 19.267778829128247,
   "start_distance_m": 3918.0,
   "end_distance_m": 4018.0,
   "midpoint_distance_m": 3968.0,
   "start_elevation_m": 1751.8112349789535,
   "end_elevation_m": 1771.0790138080818,
   "start_xy": [
    2578707.786937878,
    1135044.294115186
   ],
   "end_xy": [
    2578806.4652780737,
    1135058.2253189506
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.606760845967074,
   "start_distance_m": 1374.0,
   "end_distance_m": 1379.0,
   "midpoint_distance_m": 1376.5,
   "start_elevation_m": 1489.2692470506402,
   "end_elevation_m": 1488.9889090083418,
   "start_xy": [
    2576359.0508279004,
    1134848.2463566274
   ],
   "end_xy": [
    2576361.5028683594,
    1134852.6038212099
   ]
  },
  "min_10m": {
   "gradient_pct": -5.402247640793121,
   "start_distance_m": 1375.0,
   "end_distance_m": 1385.0,
   "midpoint_distance_m": 1380.0,
   "start_elevation_m": 1489.2076995644604,
   "end_elevation_m": 1488.6674748003811,
   "start_xy": [
    2576359.541235992,
    1134849.117849544
   ],
   "end_xy": [
    2576364.4453169107,
    1134857.8327787088
   ]
  },
  "min_20m": {
   "gradient_pct": -4.926445066403176,
   "start_distance_m": 1369.0,
   "end_distance_m": 1389.0,
   "midpoint_distance_m": 1379.0,
   "start_elevation_m": 1489.504492807258,
   "end_elevation_m": 1488.5192037939773,
   "start_xy": [
    2576356.6851829886,
    1134843.8413934049
   ],
   "end_xy": [
    2576365.923860147,
    1134861.5463379873
   ]
  },
  "min_25m": {
   "gradient_pct": -4.6510460631116075,
   "start_distance_m": 1368.0,
   "end_distance_m": 1393.0,
   "midpoint_distance_m": 1380.5,
   "start_elevation_m": 1489.53570513836,
   "end_elevation_m": 1488.3729436225822,
   "start_xy": [
    2576356.212095172,
    1134842.960378128
   ],
   "end_xy": [
    2576367.3627844127,
    1134865.2785621174
   ]
  },
  "min_50m": {
   "gradient_pct": -2.7235615868139575,
   "start_distance_m": 1362.0,
   "end_distance_m": 1412.0,
   "midpoint_distance_m": 1387.0,
   "start_elevation_m": 1489.5912916826064,
   "end_elevation_m": 1488.2295108891994,
   "start_xy": [
    2576353.367036605,
    1134837.6780226878
   ],
   "end_xy": [
    2576376.7509149387,
    1134881.732013457
   ]
  },
  "min_100m": {
   "gradient_pct": -1.0052429508352816,
   "start_distance_m": 1362.0,
   "end_distance_m": 1462.0,
   "midpoint_distance_m": 1412.0,
   "start_elevation_m": 1489.5912916826064,
   "end_elevation_m": 1488.5860487317711,
   "start_xy": [
    2576353.367036605,
    1134837.6780226878
   ],
   "end_xy": [
    2576422.5539300865,
    1134898.1131819698
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 35.80091999411934,
   "start_distance_m": 3409.0,
   "end_distance_m": 3411.0,
   "midpoint_distance_m": 3410.0,
   "start_elevation_m": 1694.7428456609352,
   "end_elevation_m": 1695.4588640608176,
   "start_xy": [
    2578209.6025552684,
    1135124.983494222
   ],
   "end_xy": [
    2578211.5945048807,
    1135124.875577788
   ]
  },
  "max_3m": {
   "gradient_pct": 28.245188033307993,
   "start_distance_m": 3409.0,
   "end_distance_m": 3412.0,
   "midpoint_distance_m": 3410.5,
   "start_elevation_m": 1694.7428456609352,
   "end_elevation_m": 1695.5902013019345,
   "start_xy": [
    2578209.6025552684,
    1135124.983494222
   ],
   "end_xy": [
    2578212.5907188077,
    1135124.7886421138
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.001,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    1638.0,
    1643.0
   ]
  ],
  "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:2056",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
   "data/cache/ch/swissalti3d_2021_2576-1134_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2021_2576-1135_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2021_2577-1134_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2021_2577-1135_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2021_2578-1134_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2021_2578-1135_0.5_2056_5728.tif"
  ],
  "calculated_at": "2026-09-11T01:30:19+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/switzerland-2026-09-10-batch.osm.pbf",
  "osm_snapshot": "",
  "run_id": "ch-run7-260911",
  "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": [
   "2576-1134",
   "2576-1135",
   "2577-1134",
   "2577-1135",
   "2578-1134",
   "2578-1135"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Ormont-Dessus",
  "county": "Vaud",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}