{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (46.6627, 8.0628)",
 "slug": "discovered-lane-46-6627-8-0628",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.760708592134506,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 267.0,
   "end_distance_m": 269.0,
   "start_elevation_m": 1983.022102461583,
   "end_elevation_m": 1983.5173166334257,
   "min_gradient_pct": -4.658825528849775
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.02818594087724,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 258.0,
   "end_distance_m": 261.0,
   "start_elevation_m": 1980.963980193422,
   "end_elevation_m": 1981.6848257716483,
   "min_gradient_pct": -4.199044127941913
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.768919221070064,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 258.0,
   "end_distance_m": 263.0,
   "start_elevation_m": 1980.963980193422,
   "end_elevation_m": 1982.1524261544755,
   "min_gradient_pct": -3.845172922679012
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.031333166843524,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 258.0,
   "end_distance_m": 268.0,
   "start_elevation_m": 1980.963980193422,
   "end_elevation_m": 1983.2671135101064,
   "min_gradient_pct": -3.280235001091114
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.70874432069604,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 254.0,
   "end_distance_m": 274.0,
   "start_elevation_m": 1980.085764564918,
   "end_elevation_m": 1984.6275134290572,
   "min_gradient_pct": -2.6209303798520978
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.525560955419678,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 254.0,
   "end_distance_m": 279.0,
   "start_elevation_m": 1980.085764564918,
   "end_elevation_m": 1985.717154803773,
   "min_gradient_pct": -2.190038610198826
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.55560973114916,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 242.0,
   "end_distance_m": 292.0,
   "start_elevation_m": 1977.6681624855646,
   "end_elevation_m": 1988.4459673511392,
   "min_gradient_pct": -1.1848585737743633
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.992409361404725,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 239.0,
   "end_distance_m": 339.0,
   "start_elevation_m": 1977.144292136737,
   "end_elevation_m": 1997.1367014981417,
   "min_gradient_pct": -0.45147709791399393
  }
 ],
 "shape": {
  "ascent_concentration": 0.456,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 196.0,
  "shape_class": "stepped"
 },
 "length_m": 546.92359921808,
 "start_elevation_m": 1971.4755953906133,
 "end_elevation_m": 2026.9887471289185,
 "endpoint_gain_m": 55.51315173830517,
 "overall_gradient_pct": 10.150074309770256,
 "accumulated_ascent_m": 57.454278798954874,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.768919221070064,
   "start_distance_m": 258.0,
   "end_distance_m": 263.0,
   "midpoint_distance_m": 260.5,
   "start_elevation_m": 1980.963980193422,
   "end_elevation_m": 1982.1524261544755,
   "start_xy": [
    2647944.7921696124,
    1168212.7547106752
   ],
   "end_xy": [
    2647940.0067943884,
    1168211.3458235676
   ]
  },
  "max_10m": {
   "gradient_pct": 23.031333166843524,
   "start_distance_m": 258.0,
   "end_distance_m": 268.0,
   "midpoint_distance_m": 263.0,
   "start_elevation_m": 1980.963980193422,
   "end_elevation_m": 1983.2671135101064,
   "start_xy": [
    2647944.7921696124,
    1168212.7547106752
   ],
   "end_xy": [
    2647935.3130372576,
    1168209.6228482348
   ]
  },
  "max_20m": {
   "gradient_pct": 22.70874432069604,
   "start_distance_m": 254.0,
   "end_distance_m": 274.0,
   "midpoint_distance_m": 264.0,
   "start_elevation_m": 1980.085764564918,
   "end_elevation_m": 1984.6275134290572,
   "start_xy": [
    2647948.6993622766,
    1168213.6113584933
   ],
   "end_xy": [
    2647929.799768246,
    1168207.263867328
   ]
  },
  "max_25m": {
   "gradient_pct": 22.525560955419678,
   "start_distance_m": 254.0,
   "end_distance_m": 279.0,
   "midpoint_distance_m": 266.5,
   "start_elevation_m": 1980.085764564918,
   "end_elevation_m": 1985.717154803773,
   "start_xy": [
    2647948.6993622766,
    1168213.6113584933
   ],
   "end_xy": [
    2647925.5320215668,
    1168204.6588071974
   ]
  },
  "max_50m": {
   "gradient_pct": 21.55560973114916,
   "start_distance_m": 242.0,
   "end_distance_m": 292.0,
   "midpoint_distance_m": 267.0,
   "start_elevation_m": 1977.6681624855646,
   "end_elevation_m": 1988.4459673511392,
   "start_xy": [
    2647960.527413364,
    1168215.6112873235
   ],
   "end_xy": [
    2647915.1512628277,
    1168196.9163816913
   ]
  },
  "max_100m": {
   "gradient_pct": 19.992409361404725,
   "start_distance_m": 239.0,
   "end_distance_m": 339.0,
   "midpoint_distance_m": 289.0,
   "start_elevation_m": 1977.144292136737,
   "end_elevation_m": 1997.1367014981417,
   "start_xy": [
    2647963.49219983,
    1168216.0695876516
   ],
   "end_xy": [
    2647870.749804368,
    1168186.8392548885
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.845172922679012,
   "start_distance_m": 183.0,
   "end_distance_m": 188.0,
   "midpoint_distance_m": 185.5,
   "start_elevation_m": 1975.203490494729,
   "end_elevation_m": 1975.0112318485951,
   "start_xy": [
    2648018.926213892,
    1168222.9711899462
   ],
   "end_xy": [
    2648013.9556377577,
    1168222.5246788983
   ]
  },
  "min_10m": {
   "gradient_pct": -3.280235001091114,
   "start_distance_m": 182.0,
   "end_distance_m": 192.0,
   "midpoint_distance_m": 187.0,
   "start_elevation_m": 1975.2150908118485,
   "end_elevation_m": 1974.8870673117394,
   "start_xy": [
    2648019.9150169613,
    1168223.120416253
   ],
   "end_xy": [
    2648009.957100878,
    1168222.4164993046
   ]
  },
  "min_20m": {
   "gradient_pct": -2.6209303798520978,
   "start_distance_m": 181.0,
   "end_distance_m": 201.0,
   "midpoint_distance_m": 191.0,
   "start_elevation_m": 1975.2360096574475,
   "end_elevation_m": 1974.7118235814771,
   "start_xy": [
    2648020.9038200304,
    1168223.26964256
   ],
   "end_xy": [
    2648000.962189069,
    1168222.1363116237
   ]
  },
  "min_25m": {
   "gradient_pct": -2.190038610198826,
   "start_distance_m": 179.0,
   "end_distance_m": 204.0,
   "midpoint_distance_m": 191.5,
   "start_elevation_m": 1975.261700902136,
   "end_elevation_m": 1974.7141912495863,
   "start_xy": [
    2648022.87771559,
    1168223.587539273
   ],
   "end_xy": [
    2647997.969648909,
    1168221.9248798622
   ]
  },
  "min_50m": {
   "gradient_pct": -1.1848585737743633,
   "start_distance_m": 141.0,
   "end_distance_m": 191.0,
   "midpoint_distance_m": 166.0,
   "start_elevation_m": 1975.510004824297,
   "end_elevation_m": 1974.91757553741,
   "start_xy": [
    2648059.2856345437,
    1168234.370267855
   ],
   "end_xy": [
    2648010.9567350983,
    1168222.443544203
   ]
  },
  "min_100m": {
   "gradient_pct": -0.45147709791399393,
   "start_distance_m": 101.0,
   "end_distance_m": 201.0,
   "midpoint_distance_m": 151.0,
   "start_elevation_m": 1975.163300679391,
   "end_elevation_m": 1974.7118235814771,
   "start_xy": [
    2648091.788688223,
    1168257.2197249024
   ],
   "end_xy": [
    2648000.962189069,
    1168222.1363116237
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.760708592134506,
   "start_distance_m": 267.0,
   "end_distance_m": 269.0,
   "midpoint_distance_m": 268.0,
   "start_elevation_m": 1983.022102461583,
   "end_elevation_m": 1983.5173166334257,
   "start_xy": [
    2647936.2517886837,
    1168209.9674433013
   ],
   "end_xy": [
    2647934.3895771024,
    1168209.2393775627
   ]
  },
  "max_3m": {
   "gradient_pct": 24.02818594087724,
   "start_distance_m": 258.0,
   "end_distance_m": 261.0,
   "midpoint_distance_m": 259.5,
   "start_elevation_m": 1980.963980193422,
   "end_elevation_m": 1981.6848257716483,
   "start_xy": [
    2647944.7921696124,
    1168212.7547106752
   ],
   "end_xy": [
    2647941.884297241,
    1168212.0350137008
   ]
  }
 },
 "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_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_2025_2647-1168_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2025_2648-1168_0.5_2056_5728.tif"
  ],
  "calculated_at": "2026-09-11T03:00:23+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": [
   "2647-1168",
   "2648-1168"
  ],
  "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": "Grindelwald",
  "county": "Bern/Berne",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}