{
 "ocl_version": "0.1.0",
 "name": "Alpstrasse",
 "slug": "alpstrasse-6",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.38799931296944,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 888.0,
   "end_distance_m": 890.0,
   "start_elevation_m": 1342.1517389623307,
   "end_elevation_m": 1342.57949894859,
   "min_gradient_pct": -30.465393868382762,
   "suppressed_max_gradient_pct": 65.77714462448512,
   "suppressed_location_m": [
    2522.0,
    2524.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 18.844414087849753,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 13.0,
   "end_distance_m": 16.0,
   "start_elevation_m": 1240.273397511437,
   "end_elevation_m": 1240.8387299340725,
   "min_gradient_pct": -27.61371717107674,
   "suppressed_max_gradient_pct": 56.42405752608587,
   "suppressed_location_m": [
    2522.0,
    2525.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 18.7058968366091,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 14.0,
   "end_distance_m": 19.0,
   "start_elevation_m": 1240.4438604069314,
   "end_elevation_m": 1241.379155248762,
   "min_gradient_pct": -23.69443562617107,
   "suppressed_max_gradient_pct": 53.30329604189046,
   "suppressed_location_m": [
    2522.0,
    2527.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 18.50901399088798,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 10.0,
   "end_distance_m": 20.0,
   "start_elevation_m": 1239.71208213434,
   "end_elevation_m": 1241.562983533429,
   "min_gradient_pct": -16.2069872426423,
   "suppressed_max_gradient_pct": 42.34452495431242,
   "suppressed_location_m": [
    2520.0,
    2530.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 17.971709476240676,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 33.0,
   "end_distance_m": 53.0,
   "start_elevation_m": 1243.7971254785557,
   "end_elevation_m": 1247.3914673738038,
   "min_gradient_pct": -4.984876250634898,
   "suppressed_max_gradient_pct": 26.49611156004994,
   "suppressed_location_m": [
    2510.0,
    2530.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 17.92503265236519,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 40.0,
   "end_distance_m": 65.0,
   "start_elevation_m": 1245.0207886090257,
   "end_elevation_m": 1249.502046772117,
   "min_gradient_pct": -2.562860642204214,
   "suppressed_max_gradient_pct": 23.370367907851687,
   "suppressed_location_m": [
    2505.0,
    2530.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.825932335658308,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 9.0,
   "end_distance_m": 59.0,
   "start_elevation_m": 1239.5321576348801,
   "end_elevation_m": 1248.4451238027093,
   "min_gradient_pct": 3.5077378527043948
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.714845161621497,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 8.0,
   "end_distance_m": 108.0,
   "start_elevation_m": 1239.351963747588,
   "end_elevation_m": 1257.0668089092094,
   "min_gradient_pct": 6.114722453521836
  }
 ],
 "shape": {
  "ascent_concentration": 0.269,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 366.0,
  "shape_class": "sustained"
 },
 "length_m": 3077.0570740557173,
 "start_elevation_m": 1238.5365043896431,
 "end_elevation_m": 1577.5339013330047,
 "endpoint_gain_m": 338.99739694336154,
 "overall_gradient_pct": 11.016935623379444,
 "accumulated_ascent_m": 340.70096941960514,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 18.7058968366091,
   "start_distance_m": 14.0,
   "end_distance_m": 19.0,
   "midpoint_distance_m": 16.5,
   "start_elevation_m": 1240.4438604069314,
   "end_elevation_m": 1241.379155248762,
   "start_xy": [
    2750588.637989704,
    1174263.0190117492
   ],
   "end_xy": [
    2750584.5261406866,
    1174265.7809234948
   ]
  },
  "max_10m": {
   "gradient_pct": 18.50901399088798,
   "start_distance_m": 10.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 15.0,
   "start_elevation_m": 1239.71208213434,
   "end_elevation_m": 1241.562983533429,
   "start_xy": [
    2750591.0588248335,
    1174259.8653507251
   ],
   "end_xy": [
    2750583.647215459,
    1174266.2578830784
   ]
  },
  "max_20m": {
   "gradient_pct": 17.971709476240676,
   "start_distance_m": 33.0,
   "end_distance_m": 53.0,
   "midpoint_distance_m": 43.0,
   "start_elevation_m": 1243.7971254785557,
   "end_elevation_m": 1247.3914673738038,
   "start_xy": [
    2750571.3193150433,
    1174270.362220884
   ],
   "end_xy": [
    2750554.2175980066,
    1174279.6938499815
   ]
  },
  "max_25m": {
   "gradient_pct": 17.92503265236519,
   "start_distance_m": 40.0,
   "end_distance_m": 65.0,
   "midpoint_distance_m": 52.5,
   "start_elevation_m": 1245.0207886090257,
   "end_elevation_m": 1249.502046772117,
   "start_xy": [
    2750564.6573453587,
    1174272.511211108
   ],
   "end_xy": [
    2750547.770785583,
    1174289.8059745857
   ]
  },
  "max_50m": {
   "gradient_pct": 17.825932335658308,
   "start_distance_m": 9.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 34.0,
   "start_elevation_m": 1239.5321576348801,
   "end_elevation_m": 1248.4451238027093,
   "start_xy": [
    2750591.4899678873,
    1174258.9630672066
   ],
   "end_xy": [
    2750550.9118556455,
    1174284.6938642259
   ]
  },
  "max_100m": {
   "gradient_pct": 17.714845161621497,
   "start_distance_m": 8.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 58.0,
   "start_elevation_m": 1239.351963747588,
   "end_elevation_m": 1257.0668089092094,
   "start_xy": [
    2750591.9219185864,
    1174258.0611699878
   ],
   "end_xy": [
    2750511.0591331073,
    1174308.9692884432
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -23.69443562617107,
   "start_distance_m": 2538.0,
   "end_distance_m": 2543.0,
   "midpoint_distance_m": 2540.5,
   "start_elevation_m": 1529.9935382208828,
   "end_elevation_m": 1528.8088164395742,
   "start_xy": [
    2749267.1055503017,
    1174337.7551947914
   ],
   "end_xy": [
    2749263.156152342,
    1174334.688885491
   ]
  },
  "min_10m": {
   "gradient_pct": -16.2069872426423,
   "start_distance_m": 2538.0,
   "end_distance_m": 2548.0,
   "midpoint_distance_m": 2543.0,
   "start_elevation_m": 1529.9935382208828,
   "end_elevation_m": 1528.3728394966186,
   "start_xy": [
    2749267.1055503017,
    1174337.7551947914
   ],
   "end_xy": [
    2749258.827882694,
    1174332.239236726
   ]
  },
  "min_20m": {
   "gradient_pct": -4.984876250634898,
   "start_distance_m": 2538.0,
   "end_distance_m": 2558.0,
   "midpoint_distance_m": 2548.0,
   "start_elevation_m": 1529.9935382208828,
   "end_elevation_m": 1528.9965629707558,
   "start_xy": [
    2749267.1055503017,
    1174337.7551947914
   ],
   "end_xy": [
    2749249.6597204194,
    1174328.246145526
   ]
  },
  "min_25m": {
   "gradient_pct": -2.562860642204214,
   "start_distance_m": 2534.0,
   "end_distance_m": 2559.0,
   "midpoint_distance_m": 2546.5,
   "start_elevation_m": 1529.7008232576559,
   "end_elevation_m": 1529.0601080971048,
   "start_xy": [
    2749270.265284714,
    1174340.2079639616
   ],
   "end_xy": [
    2749248.7432770208,
    1174327.8459812317
   ]
  },
  "min_50m": {
   "gradient_pct": 3.5077378527043948,
   "start_distance_m": 2530.0,
   "end_distance_m": 2580.0,
   "midpoint_distance_m": 2555.0,
   "start_elevation_m": 1529.3494639745413,
   "end_elevation_m": 1531.1033329008935,
   "start_xy": [
    2749273.4250071347,
    1174342.660748574
   ],
   "end_xy": [
    2749228.569334617,
    1174322.3314037404
   ]
  },
  "min_100m": {
   "gradient_pct": 6.114722453521836,
   "start_distance_m": 2977.0,
   "end_distance_m": 3077.0,
   "midpoint_distance_m": 3027.0,
   "start_elevation_m": 1571.4158458018671,
   "end_elevation_m": 1577.530568255389,
   "start_xy": [
    2748954.0634769746,
    1174094.4862393572
   ],
   "end_xy": [
    2748888.8930893047,
    1174018.967623829
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.38799931296944,
   "start_distance_m": 888.0,
   "end_distance_m": 890.0,
   "midpoint_distance_m": 889.0,
   "start_elevation_m": 1342.1517389623307,
   "end_elevation_m": 1342.57949894859,
   "start_xy": [
    2750102.1431523757,
    1174196.0197849453
   ],
   "end_xy": [
    2750100.6851387993,
    1174194.6507722067
   ]
  },
  "max_3m": {
   "gradient_pct": 18.844414087849753,
   "start_distance_m": 13.0,
   "end_distance_m": 16.0,
   "midpoint_distance_m": 14.5,
   "start_elevation_m": 1240.273397511437,
   "end_elevation_m": 1240.8387299340725,
   "start_xy": [
    2750589.2959986036,
    1174262.266001598
   ],
   "end_xy": [
    2750587.160781733,
    1174264.3461190772
   ]
  }
 },
 "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": 0.002,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.005,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 5.0,
     "start_m": 2527.0,
     "end_m": 2532.0,
     "raw_pct": 23.85,
     "reason": "spike+mask-edge"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "excluded_ranges_m": [
   [
    2520.0,
    2534.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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_2023_2748-1173_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2023_2748-1174_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2023_2749-1173_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2023_2749-1174_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2023_2750-1173_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2023_2750-1174_0.5_2056_5728.tif"
  ],
  "calculated_at": "2026-09-12T01:31:36+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-ch-ch/batch-switzerland-rchunk02.pbf",
  "osm_snapshot": "",
  "run_id": "texture-ch-ch-260912",
  "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": [
   "2748-1173",
   "2748-1174",
   "2749-1173",
   "2749-1174",
   "2750-1173",
   "2750-1174"
  ],
  "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": "Flerden",
  "county": "Graub\u00fcnden/Grischun/Grigioni",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}