{
 "ocl_version": "0.1.0",
 "name": "Ra Str\u00e1da de Prel\u00f3nga",
 "slug": "ra-strada-de-prelonga-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.208754347789863,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 733.0,
   "end_distance_m": 735.0,
   "start_elevation_m": 723.2561134176508,
   "end_elevation_m": 723.7602885046066,
   "min_gradient_pct": 0.19268516896886467
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.48992454568497,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 728.0,
   "end_distance_m": 731.0,
   "start_elevation_m": 722.0617001891225,
   "end_elevation_m": 722.796397925493,
   "min_gradient_pct": 1.1079080923991569
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.5953794875345,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 730.0,
   "end_distance_m": 735.0,
   "start_elevation_m": 722.5305195302299,
   "end_elevation_m": 723.7602885046066,
   "min_gradient_pct": 1.3549032337050448
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.88723391085591,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 728.0,
   "end_distance_m": 738.0,
   "start_elevation_m": 722.0617001891225,
   "end_elevation_m": 724.450423580208,
   "min_gradient_pct": 1.6555484747573246
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.01635967845243,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 719.0,
   "end_distance_m": 739.0,
   "start_elevation_m": 720.0726219343084,
   "end_elevation_m": 724.6758938699988,
   "min_gradient_pct": 1.9301495941869007
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.594825105578366,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 716.0,
   "end_distance_m": 741.0,
   "start_elevation_m": 719.4642828758292,
   "end_elevation_m": 725.1129891522238,
   "min_gradient_pct": 2.2504388717975417
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.04375333935309,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 691.0,
   "end_distance_m": 741.0,
   "start_elevation_m": 714.5911124825473,
   "end_elevation_m": 725.1129891522238,
   "min_gradient_pct": 2.9303161047778303
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.350040682753388,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 453.0,
   "end_distance_m": 553.0,
   "start_elevation_m": 678.1499344966887,
   "end_elevation_m": 695.4999751794421,
   "min_gradient_pct": 5.148099846198761
  }
 ],
 "shape": {
  "ascent_concentration": 0.349,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 345.0,
  "shape_class": "sustained"
 },
 "length_m": 802.9225697778757,
 "start_elevation_m": 636.426843779292,
 "end_elevation_m": 727.467754654546,
 "endpoint_gain_m": 91.04091087525399,
 "overall_gradient_pct": 11.338691214078086,
 "accumulated_ascent_m": 91.09207489426353,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.5953794875345,
   "start_distance_m": 730.0,
   "end_distance_m": 735.0,
   "midpoint_distance_m": 732.5,
   "start_elevation_m": 722.5305195302299,
   "end_elevation_m": 723.7602885046066,
   "start_xy": [
    2721320.616045294,
    1101871.3915536148
   ],
   "end_xy": [
    2721323.770788308,
    1101867.5143430338
   ]
  },
  "max_10m": {
   "gradient_pct": 23.88723391085591,
   "start_distance_m": 728.0,
   "end_distance_m": 738.0,
   "midpoint_distance_m": 733.0,
   "start_elevation_m": 722.0617001891225,
   "end_elevation_m": 724.450423580208,
   "start_xy": [
    2721319.312070735,
    1101872.9080134227
   ],
   "end_xy": [
    2721325.6129468684,
    1101865.146548313
   ]
  },
  "max_20m": {
   "gradient_pct": 23.01635967845243,
   "start_distance_m": 719.0,
   "end_distance_m": 739.0,
   "midpoint_distance_m": 729.0,
   "start_elevation_m": 720.0726219343084,
   "end_elevation_m": 724.6758938699988,
   "start_xy": [
    2721313.4441852192,
    1101879.7320825588
   ],
   "end_xy": [
    2721326.226999722,
    1101864.3572834064
   ]
  },
  "max_25m": {
   "gradient_pct": 22.594825105578366,
   "start_distance_m": 716.0,
   "end_distance_m": 741.0,
   "midpoint_distance_m": 728.5,
   "start_elevation_m": 719.4642828758292,
   "end_elevation_m": 725.1129891522238,
   "start_xy": [
    2721311.4882233804,
    1101882.006772271
   ],
   "end_xy": [
    2721327.4551054286,
    1101862.7787535926
   ]
  },
  "max_50m": {
   "gradient_pct": 21.04375333935309,
   "start_distance_m": 691.0,
   "end_distance_m": 741.0,
   "midpoint_distance_m": 716.0,
   "start_elevation_m": 714.5911124825473,
   "end_elevation_m": 725.1129891522238,
   "start_xy": [
    2721292.8800925957,
    1101898.170364534
   ],
   "end_xy": [
    2721327.4551054286,
    1101862.7787535926
   ]
  },
  "max_100m": {
   "gradient_pct": 17.350040682753388,
   "start_distance_m": 453.0,
   "end_distance_m": 553.0,
   "midpoint_distance_m": 503.0,
   "start_elevation_m": 678.1499344966887,
   "end_elevation_m": 695.4999751794421,
   "start_xy": [
    2721115.323095704,
    1101804.4699791945
   ],
   "end_xy": [
    2721180.4708869085,
    1101830.0386591617
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.3549032337050448,
   "start_distance_m": 755.0,
   "end_distance_m": 760.0,
   "midpoint_distance_m": 757.5,
   "start_elevation_m": 726.0736206178476,
   "end_elevation_m": 726.1413657795329,
   "start_xy": [
    2721323.875823037,
    1101850.42448977
   ],
   "end_xy": [
    2721320.731027872,
    1101846.537297548
   ]
  },
  "min_10m": {
   "gradient_pct": 1.6555484747573246,
   "start_distance_m": 752.0,
   "end_distance_m": 762.0,
   "midpoint_distance_m": 757.0,
   "start_elevation_m": 726.016133228861,
   "end_elevation_m": 726.1816880763367,
   "start_xy": [
    2721325.762700136,
    1101852.756805103
   ],
   "end_xy": [
    2721319.473109806,
    1101844.9824206592
   ]
  },
  "min_20m": {
   "gradient_pct": 1.9301495941869007,
   "start_distance_m": 748.0,
   "end_distance_m": 768.0,
   "midpoint_distance_m": 758.0,
   "start_elevation_m": 725.9482080755979,
   "end_elevation_m": 726.3342379944353,
   "start_xy": [
    2721327.9124168875,
    1101856.1005865308
   ],
   "end_xy": [
    2721315.7583036073,
    1101840.2720787076
   ]
  },
  "min_25m": {
   "gradient_pct": 2.2504388717975417,
   "start_distance_m": 747.0,
   "end_distance_m": 772.0,
   "midpoint_distance_m": 759.5,
   "start_elevation_m": 725.9155899295482,
   "end_elevation_m": 726.4781996474976,
   "start_xy": [
    2721328.3069823342,
    1101857.0113085348
   ],
   "end_xy": [
    2721313.372827637,
    1101837.0612370118
   ]
  },
  "min_50m": {
   "gradient_pct": 2.9303161047778303,
   "start_distance_m": 752.0,
   "end_distance_m": 802.0,
   "midpoint_distance_m": 777.0,
   "start_elevation_m": 726.016133228861,
   "end_elevation_m": 727.4812912812499,
   "start_xy": [
    2721325.762700136,
    1101852.756805103
   ],
   "end_xy": [
    2721295.80097538,
    1101812.7487487579
   ]
  },
  "min_100m": {
   "gradient_pct": 5.148099846198761,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 636.426843779292,
   "end_elevation_m": 641.5749436254907,
   "start_xy": [
    2720903.864,
    1101838.91
   ],
   "end_xy": [
    2720949.406169782,
    1101919.6806476652
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.208754347789863,
   "start_distance_m": 733.0,
   "end_distance_m": 735.0,
   "midpoint_distance_m": 734.0,
   "start_elevation_m": 723.2561134176508,
   "end_elevation_m": 723.7602885046066,
   "start_xy": [
    2721322.542682601,
    1101869.0928728473
   ],
   "end_xy": [
    2721323.770788308,
    1101867.5143430338
   ]
  },
  "max_3m": {
   "gradient_pct": 24.48992454568497,
   "start_distance_m": 728.0,
   "end_distance_m": 731.0,
   "midpoint_distance_m": 729.5,
   "start_elevation_m": 722.0617001891225,
   "end_elevation_m": 722.796397925493,
   "start_xy": [
    2721319.312070735,
    1101872.9080134227
   ],
   "end_xy": [
    2721321.268032573,
    1101870.6333237106
   ]
  }
 },
 "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": []
 },
 "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_2022_2720-1101_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2022_2721-1101_0.5_2056_5728.tif"
  ],
  "calculated_at": "2026-09-11T03:30:57+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": [
   "2720-1101",
   "2721-1101"
  ],
  "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": "Lugano",
  "county": "Ticino",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}