{
 "ocl_version": "0.1.0",
 "name": "Via Alp da Rueun",
 "slug": "via-alp-da-rueun",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 16.83277936333525,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 2371.0,
   "end_distance_m": 2373.0,
   "start_elevation_m": 1440.4160059250696,
   "end_elevation_m": 1440.7526615123363,
   "min_gradient_pct": 3.8022101072215264
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 16.921507849300117,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 2370.0,
   "end_distance_m": 2373.0,
   "start_elevation_m": 1440.2450162768573,
   "end_elevation_m": 1440.7526615123363,
   "min_gradient_pct": 3.9497026242694724
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 16.535485219396833,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2368.0,
   "end_distance_m": 2373.0,
   "start_elevation_m": 1439.9258872513665,
   "end_elevation_m": 1440.7526615123363,
   "min_gradient_pct": 4.3726822354483375
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 16.091194690109205,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2367.0,
   "end_distance_m": 2377.0,
   "start_elevation_m": 1439.7654887873339,
   "end_elevation_m": 1441.3746082563448,
   "min_gradient_pct": 4.706291629215684
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 15.435360398930698,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2362.0,
   "end_distance_m": 2382.0,
   "start_elevation_m": 1439.0262924970082,
   "end_elevation_m": 1442.1133645767943,
   "min_gradient_pct": 5.063279185584406
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 15.212955140265876,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2362.0,
   "end_distance_m": 2387.0,
   "start_elevation_m": 1439.0262924970082,
   "end_elevation_m": 1442.8295312820746,
   "min_gradient_pct": 5.1564927572135275
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 14.217024734042752,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2357.0,
   "end_distance_m": 2407.0,
   "start_elevation_m": 1438.3526691726468,
   "end_elevation_m": 1445.4611815396681,
   "min_gradient_pct": 6.048712004099798
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.376587677670614,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 170.0,
   "end_distance_m": 270.0,
   "start_elevation_m": 1193.3749834078533,
   "end_elevation_m": 1206.751571085524,
   "min_gradient_pct": 6.590714289211519
  }
 ],
 "shape": {
  "ascent_concentration": 0.273,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 417.0,
  "shape_class": "sustained"
 },
 "length_m": 3101.919210133334,
 "start_elevation_m": 1172.278866570329,
 "end_elevation_m": 1516.9368570068395,
 "endpoint_gain_m": 344.65799043651054,
 "overall_gradient_pct": 11.11112079613755,
 "accumulated_ascent_m": 344.65799043651054,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 16.535485219396833,
   "start_distance_m": 2368.0,
   "end_distance_m": 2373.0,
   "midpoint_distance_m": 2370.5,
   "start_elevation_m": 1439.9258872513665,
   "end_elevation_m": 1440.7526615123363,
   "start_xy": [
    2729419.756057178,
    1184054.8293376532
   ],
   "end_xy": [
    2729416.849887072,
    1184058.898018801
   ]
  },
  "max_10m": {
   "gradient_pct": 16.091194690109205,
   "start_distance_m": 2367.0,
   "end_distance_m": 2377.0,
   "midpoint_distance_m": 2372.0,
   "start_elevation_m": 1439.7654887873339,
   "end_elevation_m": 1441.3746082563448,
   "start_xy": [
    2729420.3378830263,
    1184054.0160244694
   ],
   "end_xy": [
    2729414.5237999116,
    1184062.1521409156
   ]
  },
  "max_20m": {
   "gradient_pct": 15.435360398930698,
   "start_distance_m": 2362.0,
   "end_distance_m": 2382.0,
   "midpoint_distance_m": 2372.0,
   "start_elevation_m": 1439.0262924970082,
   "end_elevation_m": 1442.1133645767943,
   "start_xy": [
    2729423.2933341675,
    1184049.9855400932
   ],
   "end_xy": [
    2729411.61702162,
    1184066.2203873245
   ]
  },
  "max_25m": {
   "gradient_pct": 15.212955140265876,
   "start_distance_m": 2362.0,
   "end_distance_m": 2387.0,
   "midpoint_distance_m": 2374.5,
   "start_elevation_m": 1439.0262924970082,
   "end_elevation_m": 1442.8295312820746,
   "start_xy": [
    2729423.2933341675,
    1184049.9855400932
   ],
   "end_xy": [
    2729409.1686417167,
    1184070.5731750126
   ]
  },
  "max_50m": {
   "gradient_pct": 14.217024734042752,
   "start_distance_m": 2357.0,
   "end_distance_m": 2407.0,
   "midpoint_distance_m": 2382.0,
   "start_elevation_m": 1438.3526691726468,
   "end_elevation_m": 1445.4611815396681,
   "start_xy": [
    2729426.903301949,
    1184046.528272245
   ],
   "end_xy": [
    2729399.998594263,
    1184088.3470364632
   ]
  },
  "max_100m": {
   "gradient_pct": 13.376587677670614,
   "start_distance_m": 170.0,
   "end_distance_m": 270.0,
   "midpoint_distance_m": 220.0,
   "start_elevation_m": 1193.3749834078533,
   "end_elevation_m": 1206.751571085524,
   "start_xy": [
    2729039.167076411,
    1183516.216620845
   ],
   "end_xy": [
    2729136.566774937,
    1183493.887152579
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 4.3726822354483375,
   "start_distance_m": 2976.0,
   "end_distance_m": 2981.0,
   "midpoint_distance_m": 2978.5,
   "start_elevation_m": 1504.662782651847,
   "end_elevation_m": 1504.8814167636194,
   "start_xy": [
    2729577.7152815377,
    1184260.0642499996
   ],
   "end_xy": [
    2729582.3526597666,
    1184261.924417649
   ]
  },
  "min_10m": {
   "gradient_pct": 4.706291629215684,
   "start_distance_m": 2971.0,
   "end_distance_m": 2981.0,
   "midpoint_distance_m": 2976.0,
   "start_elevation_m": 1504.4107876006979,
   "end_elevation_m": 1504.8814167636194,
   "start_xy": [
    2729572.9863596307,
    1184258.4402768288
   ],
   "end_xy": [
    2729582.3526597666,
    1184261.924417649
   ]
  },
  "min_20m": {
   "gradient_pct": 5.063279185584406,
   "start_distance_m": 2967.0,
   "end_distance_m": 2987.0,
   "midpoint_distance_m": 2977.0,
   "start_elevation_m": 1504.2076246034692,
   "end_elevation_m": 1505.220280440586,
   "start_xy": [
    2729569.203181545,
    1184257.1412156469
   ],
   "end_xy": [
    2729587.84778828,
    1184264.3334739085
   ]
  },
  "min_25m": {
   "gradient_pct": 5.1564927572135275,
   "start_distance_m": 2963.0,
   "end_distance_m": 2988.0,
   "midpoint_distance_m": 2975.5,
   "start_elevation_m": 1503.9787296432767,
   "end_elevation_m": 1505.26785283258,
   "start_xy": [
    2729565.4146729046,
    1184255.8581130188
   ],
   "end_xy": [
    2729588.763853781,
    1184264.734502583
   ]
  },
  "min_50m": {
   "gradient_pct": 6.048712004099798,
   "start_distance_m": 796.0,
   "end_distance_m": 846.0,
   "midpoint_distance_m": 821.0,
   "start_elevation_m": 1263.4979985598145,
   "end_elevation_m": 1266.5223545618644,
   "start_xy": [
    2729471.8401972232,
    1183593.1671262512
   ],
   "end_xy": [
    2729422.4193494385,
    1183585.987187195
   ]
  },
  "min_100m": {
   "gradient_pct": 6.590714289211519,
   "start_distance_m": 746.0,
   "end_distance_m": 846.0,
   "midpoint_distance_m": 796.0,
   "start_elevation_m": 1259.9316402726529,
   "end_elevation_m": 1266.5223545618644,
   "start_xy": [
    2729518.8105684104,
    1183589.1588828715
   ],
   "end_xy": [
    2729422.4193494385,
    1183585.987187195
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 16.83277936333525,
   "start_distance_m": 2371.0,
   "end_distance_m": 2373.0,
   "midpoint_distance_m": 2372.0,
   "start_elevation_m": 1440.4160059250696,
   "end_elevation_m": 1440.7526615123363,
   "start_xy": [
    2729418.0120592047,
    1184057.270334822
   ],
   "end_xy": [
    2729416.849887072,
    1184058.898018801
   ]
  },
  "max_3m": {
   "gradient_pct": 16.921507849300117,
   "start_distance_m": 2370.0,
   "end_distance_m": 2373.0,
   "midpoint_distance_m": 2371.5,
   "start_elevation_m": 1440.2450162768573,
   "end_elevation_m": 1440.7526615123363,
   "start_xy": [
    2729418.5938850488,
    1184056.457021635
   ],
   "end_xy": [
    2729416.849887072,
    1184058.898018801
   ]
  }
 },
 "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_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_2023_2728-1183_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2023_2728-1184_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2023_2729-1183_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2023_2729-1184_0.5_2056_5728.tif"
  ],
  "calculated_at": "2026-09-15T22:02:13+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": [
   "2728-1183",
   "2728-1184",
   "2729-1183",
   "2729-1184"
  ],
  "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": "Ilanz/Glion",
  "county": "Graub\u00fcnden/Grischun/Grigioni",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}