{
 "ocl_version": "0.1.0",
 "name": "Aecherli",
 "slug": "aecherli",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.549691055456833,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 240.0,
   "end_distance_m": 242.0,
   "start_elevation_m": 457.508147382003,
   "end_elevation_m": 457.95914120311215,
   "min_gradient_pct": -2.123503657074366
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.357902750258063,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 238.0,
   "end_distance_m": 241.0,
   "start_elevation_m": 457.0723587486007,
   "end_elevation_m": 457.74309583110846,
   "min_gradient_pct": -1.2541939758667315
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.14452663628208,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 237.0,
   "end_distance_m": 242.0,
   "start_elevation_m": 456.85191487129805,
   "end_elevation_m": 457.95914120311215,
   "min_gradient_pct": -0.9237283492655024
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.436198864853395,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 237.0,
   "end_distance_m": 247.0,
   "start_elevation_m": 456.85191487129805,
   "end_elevation_m": 458.9955347577834,
   "min_gradient_pct": -0.2920982892436541
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.771657775943595,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 236.0,
   "end_distance_m": 256.0,
   "start_elevation_m": 456.6420528988863,
   "end_elevation_m": 460.796384454075,
   "min_gradient_pct": 0.04271014991473976
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.31344573917204,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 236.0,
   "end_distance_m": 261.0,
   "start_elevation_m": 456.6420528988863,
   "end_elevation_m": 461.7204143336793,
   "min_gradient_pct": 0.04785102216374071
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.175437489880437,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 235.0,
   "end_distance_m": 285.0,
   "start_elevation_m": 456.4667143757554,
   "end_elevation_m": 465.5544331206956,
   "min_gradient_pct": 0.27697864157471486
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.956747628572543,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 205.0,
   "end_distance_m": 305.0,
   "start_elevation_m": 451.69845108872835,
   "end_elevation_m": 468.6551987173009,
   "min_gradient_pct": 0.30591641966253746
  }
 ],
 "shape": {
  "ascent_concentration": 0.563,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 112.0,
  "shape_class": "stepped"
 },
 "length_m": 305.9556403123307,
 "start_elevation_m": 445.7130389921879,
 "end_elevation_m": 468.84914399928886,
 "endpoint_gain_m": 23.13610500710098,
 "overall_gradient_pct": 7.561914852585426,
 "accumulated_ascent_m": 23.790785059798736,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.14452663628208,
   "start_distance_m": 237.0,
   "end_distance_m": 242.0,
   "midpoint_distance_m": 239.5,
   "start_elevation_m": 456.85191487129805,
   "end_elevation_m": 457.95914120311215,
   "start_xy": [
    2671872.9404701875,
    1203267.8478514168
   ],
   "end_xy": [
    2671868.296795789,
    1203269.701574179
   ]
  },
  "max_10m": {
   "gradient_pct": 21.436198864853395,
   "start_distance_m": 237.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 242.0,
   "start_elevation_m": 456.85191487129805,
   "end_elevation_m": 458.9955347577834,
   "start_xy": [
    2671872.9404701875,
    1203267.8478514168
   ],
   "end_xy": [
    2671863.749719367,
    1203271.7119119337
   ]
  },
  "max_20m": {
   "gradient_pct": 20.771657775943595,
   "start_distance_m": 236.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 246.0,
   "start_elevation_m": 456.6420528988863,
   "end_elevation_m": 460.796384454075,
   "start_xy": [
    2671873.8692050674,
    1203267.4771068643
   ],
   "end_xy": [
    2671864.146170804,
    1203279.3249694163
   ]
  },
  "max_25m": {
   "gradient_pct": 20.31344573917204,
   "start_distance_m": 236.0,
   "end_distance_m": 261.0,
   "midpoint_distance_m": 248.5,
   "start_elevation_m": 456.6420528988863,
   "end_elevation_m": 461.7204143336793,
   "start_xy": [
    2671873.8692050674,
    1203267.4771068643
   ],
   "end_xy": [
    2671868.724959505,
    1203281.2724647718
   ]
  },
  "max_50m": {
   "gradient_pct": 18.175437489880437,
   "start_distance_m": 235.0,
   "end_distance_m": 285.0,
   "midpoint_distance_m": 260.0,
   "start_elevation_m": 456.4667143757554,
   "end_elevation_m": 465.5544331206956,
   "start_xy": [
    2671874.7979399473,
    1203267.1063623119
   ],
   "end_xy": [
    2671892.2794252606,
    1203285.7874988285
   ]
  },
  "max_100m": {
   "gradient_pct": 16.956747628572543,
   "start_distance_m": 205.0,
   "end_distance_m": 305.0,
   "midpoint_distance_m": 255.0,
   "start_elevation_m": 451.69845108872835,
   "end_elevation_m": 468.6551987173009,
   "start_xy": [
    2671899.794747823,
    1203252.2507021693
   ],
   "end_xy": [
    2671911.9777447423,
    1203289.2346686248
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.9237283492655024,
   "start_distance_m": 143.0,
   "end_distance_m": 148.0,
   "midpoint_distance_m": 145.5,
   "start_elevation_m": 446.35972827901264,
   "end_elevation_m": 446.31354186154937,
   "start_xy": [
    2671929.964843327,
    1203200.3946624738
   ],
   "end_xy": [
    2671930.349522279,
    1203205.3798427216
   ]
  },
  "min_10m": {
   "gradient_pct": -0.2920982892436541,
   "start_distance_m": 57.0,
   "end_distance_m": 67.0,
   "midpoint_distance_m": 62.0,
   "start_elevation_m": 446.0475286763239,
   "end_elevation_m": 446.01831884739954,
   "start_xy": [
    2671962.877502371,
    1203141.1361400608
   ],
   "end_xy": [
    2671953.0212149518,
    1203142.8253997534
   ]
  },
  "min_20m": {
   "gradient_pct": 0.04271014991473976,
   "start_distance_m": 7.0,
   "end_distance_m": 27.0,
   "midpoint_distance_m": 17.0,
   "start_elevation_m": 445.7432110926046,
   "end_elevation_m": 445.75175312258756,
   "start_xy": [
    2672012.221623986,
    1203133.1196801318
   ],
   "end_xy": [
    2671992.48687243,
    1203136.317012825
   ]
  },
  "min_25m": {
   "gradient_pct": 0.04785102216374071,
   "start_distance_m": 3.0,
   "end_distance_m": 28.0,
   "midpoint_distance_m": 15.5,
   "start_elevation_m": 445.7309621368803,
   "end_elevation_m": 445.74292489242123,
   "start_xy": [
    2672016.0789817083,
    1203132.0610057707
   ],
   "end_xy": [
    2671991.498591061,
    1203136.4696559915
   ]
  },
  "min_50m": {
   "gradient_pct": 0.27697864157471486,
   "start_distance_m": 99.0,
   "end_distance_m": 149.0,
   "midpoint_distance_m": 124.0,
   "start_elevation_m": 446.18803864847825,
   "end_elevation_m": 446.3265279692656,
   "start_xy": [
    2671927.34084279,
    1203156.4862954502
   ],
   "end_xy": [
    2671930.371473977,
    1203206.3767129225
   ]
  },
  "min_100m": {
   "gradient_pct": 0.30591641966253746,
   "start_distance_m": 48.0,
   "end_distance_m": 148.0,
   "midpoint_distance_m": 98.0,
   "start_elevation_m": 446.00762544188683,
   "end_elevation_m": 446.31354186154937,
   "start_xy": [
    2671971.7481610486,
    1203139.6158063377
   ],
   "end_xy": [
    2671930.349522279,
    1203205.3798427216
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.549691055456833,
   "start_distance_m": 240.0,
   "end_distance_m": 242.0,
   "midpoint_distance_m": 241.0,
   "start_elevation_m": 457.508147382003,
   "end_elevation_m": 457.95914120311215,
   "start_xy": [
    2671870.1542655486,
    1203268.9600850742
   ],
   "end_xy": [
    2671868.296795789,
    1203269.701574179
   ]
  },
  "max_3m": {
   "gradient_pct": 22.357902750258063,
   "start_distance_m": 238.0,
   "end_distance_m": 241.0,
   "midpoint_distance_m": 239.5,
   "start_elevation_m": 457.0723587486007,
   "end_elevation_m": 457.74309583110846,
   "start_xy": [
    2671872.011735308,
    1203268.2185959693
   ],
   "end_xy": [
    2671869.2255306686,
    1203269.3308296266
   ]
  }
 },
 "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_2022_2671-1203_0.5_2056_5728.tif",
   "data/cache/ch/swissalti3d_2022_2672-1203_0.5_2056_5728.tif"
  ],
  "calculated_at": "2026-09-11T04:59:14+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": [
   "2671-1203",
   "2672-1203"
  ],
  "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": "Stans",
  "county": "Nidwalden",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}