{
 "ocl_version": "0.1.0",
 "name": "Alpstrasse Diggi",
 "slug": "alpstrasse-diggi-2",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.616636515701884,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1812.0,
   "end_distance_m": 1814.0,
   "start_elevation_m": 1306.261360438329,
   "end_elevation_m": 1307.013693168643,
   "min_gradient_pct": -103.93321149840631,
   "suppressed_max_gradient_pct": 295.19937528301625,
   "suppressed_location_m": [
    1150.0,
    1152.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.585705846313733,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1825.0,
   "end_distance_m": 1828.0,
   "start_elevation_m": 1307.6433112282116,
   "end_elevation_m": 1308.560882403601,
   "min_gradient_pct": -91.37956226099959,
   "suppressed_max_gradient_pct": 240.7237285548869,
   "suppressed_location_m": [
    1150.0,
    1153.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.881755423850336,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1824.0,
   "end_distance_m": 1829.0,
   "start_elevation_m": 1307.4354185539569,
   "end_elevation_m": 1308.8295063251494,
   "min_gradient_pct": -89.96105800861642,
   "suppressed_max_gradient_pct": 172.0635217849258,
   "suppressed_location_m": [
    1148.0,
    1153.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.59600707743357,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1821.0,
   "end_distance_m": 1831.0,
   "start_elevation_m": 1307.0544477528128,
   "end_elevation_m": 1309.1140484605562,
   "min_gradient_pct": -58.092519699603145,
   "suppressed_max_gradient_pct": 90.05405202042084,
   "suppressed_location_m": [
    1143.0,
    1153.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 19.898013547259552,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3215.0,
   "end_distance_m": 3235.0,
   "start_elevation_m": 1498.1648118491712,
   "end_elevation_m": 1502.144414558623,
   "min_gradient_pct": -29.408906010500004,
   "suppressed_max_gradient_pct": 48.024656650853785,
   "suppressed_location_m": [
    1133.0,
    1153.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 19.710905913685565,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3210.0,
   "end_distance_m": 3235.0,
   "start_elevation_m": 1497.2166880802017,
   "end_elevation_m": 1502.144414558623,
   "min_gradient_pct": -21.05514539754222,
   "suppressed_max_gradient_pct": 39.56990358081748,
   "suppressed_location_m": [
    1128.0,
    1153.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.123775671156636,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3138.0,
   "end_distance_m": 3188.0,
   "start_elevation_m": 1484.6281545619058,
   "end_elevation_m": 1493.6900423974841,
   "min_gradient_pct": -2.328936954492292,
   "suppressed_max_gradient_pct": 21.58129990363659,
   "suppressed_location_m": [
    1111.0,
    1161.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.955429878079713,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 3135.0,
   "end_distance_m": 3235.0,
   "start_elevation_m": 1484.1889846805434,
   "end_elevation_m": 1502.144414558623,
   "min_gradient_pct": 3.087447040598363
  }
 ],
 "shape": {
  "ascent_concentration": 0.32,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 418.0,
  "shape_class": "sustained"
 },
 "length_m": 3235.0999999999576,
 "start_elevation_m": 1145.2835734707114,
 "end_elevation_m": 1502.1691237809562,
 "endpoint_gain_m": 356.88555031024475,
 "overall_gradient_pct": 11.031669818869569,
 "accumulated_ascent_m": 371.91456517830056,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.881755423850336,
   "start_distance_m": 1824.0,
   "end_distance_m": 1829.0,
   "midpoint_distance_m": 1826.5,
   "start_elevation_m": 1307.4354185539569,
   "end_elevation_m": 1308.8295063251494,
   "start_xy": [
    2731362.6877011945,
    1224327.6375802956
   ],
   "end_xy": [
    2731367.1414673226,
    1224329.9100158974
   ]
  },
  "max_10m": {
   "gradient_pct": 20.59600707743357,
   "start_distance_m": 1821.0,
   "end_distance_m": 1831.0,
   "midpoint_distance_m": 1826.0,
   "start_elevation_m": 1307.0544477528128,
   "end_elevation_m": 1309.1140484605562,
   "start_xy": [
    2731360.0154885226,
    1224326.2740266996
   ],
   "end_xy": [
    2731368.923289922,
    1224330.8183702745
   ]
  },
  "max_20m": {
   "gradient_pct": 19.898013547259552,
   "start_distance_m": 3215.0,
   "end_distance_m": 3235.0,
   "midpoint_distance_m": 3225.0,
   "start_elevation_m": 1498.1648118491712,
   "end_elevation_m": 1502.144414558623,
   "start_xy": [
    2731569.965082725,
    1225048.4201612626
   ],
   "end_xy": [
    2731588.10644213,
    1225041.263409017
   ]
  },
  "max_25m": {
   "gradient_pct": 19.710905913685565,
   "start_distance_m": 3210.0,
   "end_distance_m": 3235.0,
   "midpoint_distance_m": 3222.5,
   "start_elevation_m": 1497.2166880802017,
   "end_elevation_m": 1502.144414558623,
   "start_xy": [
    2731565.6965924916,
    1225051.0005440083
   ],
   "end_xy": [
    2731588.10644213,
    1225041.263409017
   ]
  },
  "max_50m": {
   "gradient_pct": 18.123775671156636,
   "start_distance_m": 3138.0,
   "end_distance_m": 3188.0,
   "midpoint_distance_m": 3163.0,
   "start_elevation_m": 1484.6281545619058,
   "end_elevation_m": 1493.6900423974841,
   "start_xy": [
    2731571.9338647807,
    1225001.4398344357
   ],
   "end_xy": [
    2731548.1183804823,
    1225042.7959448597
   ]
  },
  "max_100m": {
   "gradient_pct": 17.955429878079713,
   "start_distance_m": 3135.0,
   "end_distance_m": 3235.0,
   "midpoint_distance_m": 3185.0,
   "start_elevation_m": 1484.1889846805434,
   "end_elevation_m": 1502.144414558623,
   "start_xy": [
    2731574.4246795005,
    1224999.7798470238
   ],
   "end_xy": [
    2731588.10644213,
    1225041.263409017
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -89.96105800861642,
   "start_distance_m": 1164.0,
   "end_distance_m": 1169.0,
   "midpoint_distance_m": 1166.5,
   "start_elevation_m": 1243.5674175947277,
   "end_elevation_m": 1239.0693646942968,
   "start_xy": [
    2731621.642775111,
    1224314.8189979682
   ],
   "end_xy": [
    2731617.217984682,
    1224312.4906465882
   ]
  },
  "min_10m": {
   "gradient_pct": -58.092519699603145,
   "start_distance_m": 1161.0,
   "end_distance_m": 1171.0,
   "midpoint_distance_m": 1166.0,
   "start_elevation_m": 1244.7549837534466,
   "end_elevation_m": 1238.9457317834863,
   "start_xy": [
    2731624.2976813843,
    1224316.215948616
   ],
   "end_xy": [
    2731615.448348834,
    1224311.5587735106
   ]
  },
  "min_20m": {
   "gradient_pct": -29.408906010500004,
   "start_distance_m": 1153.0,
   "end_distance_m": 1173.0,
   "midpoint_distance_m": 1163.0,
   "start_elevation_m": 1244.8414888424463,
   "end_elevation_m": 1238.9597076403463,
   "start_xy": [
    2731631.3769396734,
    1224319.9420846188
   ],
   "end_xy": [
    2731613.678398472,
    1224310.6274975024
   ]
  },
  "min_25m": {
   "gradient_pct": -21.05514539754222,
   "start_distance_m": 1153.0,
   "end_distance_m": 1178.0,
   "midpoint_distance_m": 1165.5,
   "start_elevation_m": 1244.8414888424463,
   "end_elevation_m": 1239.5777024930608,
   "start_xy": [
    2731631.3769396734,
    1224319.9420846188
   ],
   "end_xy": [
    2731609.1525704167,
    1224308.5720020328
   ]
  },
  "min_50m": {
   "gradient_pct": -2.328936954492292,
   "start_distance_m": 1153.0,
   "end_distance_m": 1203.0,
   "midpoint_distance_m": 1178.0,
   "start_elevation_m": 1244.8414888424463,
   "end_elevation_m": 1243.6770203652002,
   "start_xy": [
    2731631.3769396734,
    1224319.9420846188
   ],
   "end_xy": [
    2731584.1942239245,
    1224309.890352036
   ]
  },
  "min_100m": {
   "gradient_pct": 3.087447040598363,
   "start_distance_m": 1521.0,
   "end_distance_m": 1621.0,
   "midpoint_distance_m": 1571.0,
   "start_elevation_m": 1279.1488431464309,
   "end_elevation_m": 1282.2362901870292,
   "start_xy": [
    2731305.4037718526,
    1224192.4278547275
   ],
   "end_xy": [
    2731219.5084365285,
    1224186.8740118807
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.616636515701884,
   "start_distance_m": 1812.0,
   "end_distance_m": 1814.0,
   "midpoint_distance_m": 1813.0,
   "start_elevation_m": 1306.261360438329,
   "end_elevation_m": 1307.013693168643,
   "start_xy": [
    2731351.998508386,
    1224322.1840368207
   ],
   "end_xy": [
    2731353.7800144358,
    1224323.0930118582
   ]
  },
  "max_3m": {
   "gradient_pct": 30.585705846313733,
   "start_distance_m": 1825.0,
   "end_distance_m": 1828.0,
   "midpoint_distance_m": 1826.5,
   "start_elevation_m": 1307.6433112282116,
   "end_elevation_m": 1308.560882403601,
   "start_xy": [
    2731363.5784779224,
    1224328.0920212984
   ],
   "end_xy": [
    2731366.2506905994,
    1224329.4555748852
   ]
  }
 },
 "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": 0.017,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.021,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 10.0,
     "start_m": 1768.0,
     "end_m": 1778.0,
     "raw_pct": 20.98,
     "reason": "mask-edge"
    },
    {
     "window_m": 5.0,
     "start_m": 1769.0,
     "end_m": 1774.0,
     "raw_pct": 36.85,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "excluded_ranges_m": [
   [
    1145.0,
    1174.0
   ],
   [
    1766.0,
    1784.0
   ],
   [
    1936.0,
    1941.0
   ],
   [
    2340.0,
    2345.0
   ],
   [
    2749.0,
    2755.0
   ]
  ],
  "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_2020_2730-1223_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2020_2730-1224_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2020_2731-1223_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2019_2731-1224_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2019_2731-1225_0.5_2056_5728.tif"
  ],
  "calculated_at": "2026-09-15T21:27:34+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": [
   "2730-1223",
   "2730-1224",
   "2731-1223",
   "2731-1224",
   "2731-1225"
  ],
  "route_cut_m": 3235.1,
  "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": "Amden",
  "county": "St. Gallen",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}