{
 "ocl_version": "0.1.0",
 "name": "Kongellbakken",
 "slug": "kongellbakken",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.076685046021566,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 191.0,
   "end_distance_m": 193.0,
   "start_elevation_m": 523.8494395594498,
   "end_elevation_m": 524.4309732603703,
   "min_gradient_pct": -16.584381648306135
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.88473063709019,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 191.0,
   "end_distance_m": 194.0,
   "start_elevation_m": 523.8494395594498,
   "end_elevation_m": 524.7159814785625,
   "min_gradient_pct": -16.28487091858422
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.378478318547877,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 191.0,
   "end_distance_m": 196.0,
   "start_elevation_m": 523.8494395594498,
   "end_elevation_m": 525.2683634753772,
   "min_gradient_pct": -15.391637330595813
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.947365594185385,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 190.0,
   "end_distance_m": 200.0,
   "start_elevation_m": 523.5780674638173,
   "end_elevation_m": 526.3728040232359,
   "min_gradient_pct": -12.762865759634678
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 27.277384621305032,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 186.0,
   "end_distance_m": 206.0,
   "start_elevation_m": 522.5791930371843,
   "end_elevation_m": 528.0346699614453,
   "min_gradient_pct": -9.180980298862096
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 26.777693184098098,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 182.0,
   "end_distance_m": 207.0,
   "start_elevation_m": 521.6064575009626,
   "end_elevation_m": 528.3008807969871,
   "min_gradient_pct": -8.234653328068816
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 25.780757605867393,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 158.0,
   "end_distance_m": 208.0,
   "start_elevation_m": 515.6502573739056,
   "end_elevation_m": 528.5406361768393,
   "min_gradient_pct": -5.973110210612958
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.076085592405434,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 108.0,
   "end_distance_m": 208.0,
   "start_elevation_m": 506.4645505844338,
   "end_elevation_m": 528.5406361768393,
   "min_gradient_pct": 2.0347588134076204
  }
 ],
 "shape": {
  "ascent_concentration": 0.493,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 144.0,
  "shape_class": "stepped"
 },
 "length_m": 235.08626012572805,
 "start_elevation_m": 502.84934535766683,
 "end_elevation_m": 528.194676768558,
 "endpoint_gain_m": 25.345331410891163,
 "overall_gradient_pct": 10.781289981531058,
 "accumulated_ascent_m": 29.198039115118377,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.378478318547877,
   "start_distance_m": 191.0,
   "end_distance_m": 196.0,
   "midpoint_distance_m": 193.5,
   "start_elevation_m": 523.8494395594498,
   "end_elevation_m": 525.2683634753772,
   "start_xy": [
    257427.15346836165,
    6689596.994464116
   ],
   "end_xy": [
    257426.22473541988,
    6689601.908871286
   ]
  },
  "max_10m": {
   "gradient_pct": 27.947365594185385,
   "start_distance_m": 190.0,
   "end_distance_m": 200.0,
   "midpoint_distance_m": 195.0,
   "start_elevation_m": 523.5780674638173,
   "end_elevation_m": 526.3728040232359,
   "start_xy": [
    257427.31994253572,
    6689596.008092641
   ],
   "end_xy": [
    257425.46473849053,
    6689605.837316576
   ]
  },
  "max_20m": {
   "gradient_pct": 27.277384621305032,
   "start_distance_m": 186.0,
   "end_distance_m": 206.0,
   "midpoint_distance_m": 196.0,
   "start_elevation_m": 522.5791930371843,
   "end_elevation_m": 528.0346699614453,
   "start_xy": [
    257427.98583923205,
    6689592.06260674
   ],
   "end_xy": [
    257424.23072352522,
    6689611.7103820965
   ]
  },
  "max_25m": {
   "gradient_pct": 26.777693184098098,
   "start_distance_m": 182.0,
   "end_distance_m": 207.0,
   "midpoint_distance_m": 194.5,
   "start_elevation_m": 521.6064575009626,
   "end_elevation_m": 528.3008807969871,
   "start_xy": [
    257428.5718530074,
    6689588.105745842
   ],
   "end_xy": [
    257423.9064758941,
    6689612.655946726
   ]
  },
  "max_50m": {
   "gradient_pct": 25.780757605867393,
   "start_distance_m": 158.0,
   "end_distance_m": 208.0,
   "midpoint_distance_m": 183.0,
   "start_elevation_m": 515.6502573739056,
   "end_elevation_m": 528.5406361768393,
   "start_xy": [
    257429.26785787442,
    6689564.151698312
   ],
   "end_xy": [
    257423.56991808175,
    6689613.597950561
   ]
  },
  "max_100m": {
   "gradient_pct": 22.076085592405434,
   "start_distance_m": 108.0,
   "end_distance_m": 208.0,
   "midpoint_distance_m": 158.0,
   "start_elevation_m": 506.4645505844338,
   "end_elevation_m": 528.5406361768393,
   "start_xy": [
    257427.24726871288,
    6689514.265059532
   ],
   "end_xy": [
    257423.56991808175,
    6689613.597950561
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -15.391637330595813,
   "start_distance_m": 2.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 502.6474866846508,
   "end_elevation_m": 501.877904818121,
   "start_xy": [
    257410.96062942996,
    6689419.914787276
   ],
   "end_xy": [
    257415.93005362112,
    6689420.310878568
   ]
  },
  "min_10m": {
   "gradient_pct": -12.762865759634678,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 502.84934535766683,
   "end_elevation_m": 501.57305878170337,
   "start_xy": [
    257408.96,
    6689419.922
   ],
   "end_xy": [
    257418.8545808653,
    6689420.967982722
   ]
  },
  "min_20m": {
   "gradient_pct": -9.180980298862096,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 502.84934535766683,
   "end_elevation_m": 501.0131492978944,
   "start_xy": [
    257408.96,
    6689419.922
   ],
   "end_xy": [
    257425.8040952842,
    6689427.466000399
   ]
  },
  "min_25m": {
   "gradient_pct": -8.234653328068816,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 502.84934535766683,
   "end_elevation_m": 500.79068202564963,
   "start_xy": [
    257408.96,
    6689419.922
   ],
   "end_xy": [
    257427.18609340588,
    6689432.271472414
   ]
  },
  "min_50m": {
   "gradient_pct": -5.973110210612958,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 502.84934535766683,
   "end_elevation_m": 499.86279025236036,
   "start_xy": [
    257408.96,
    6689419.922
   ],
   "end_xy": [
    257431.76685679547,
    6689456.846961109
   ]
  },
  "min_100m": {
   "gradient_pct": 2.0347588134076204,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 502.84934535766683,
   "end_elevation_m": 504.88410417107445,
   "start_xy": [
    257408.96,
    6689419.922
   ],
   "end_xy": [
    257428.33108451436,
    6689506.336222734
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.076685046021566,
   "start_distance_m": 191.0,
   "end_distance_m": 193.0,
   "midpoint_distance_m": 192.0,
   "start_elevation_m": 523.8494395594498,
   "end_elevation_m": 524.4309732603703,
   "start_xy": [
    257427.15346836165,
    6689596.994464116
   ],
   "end_xy": [
    257426.79473311687,
    6689598.9625373185
   ]
  },
  "max_3m": {
   "gradient_pct": 28.88473063709019,
   "start_distance_m": 191.0,
   "end_distance_m": 194.0,
   "midpoint_distance_m": 192.5,
   "start_elevation_m": 523.8494395594498,
   "end_elevation_m": 524.7159814785625,
   "start_xy": [
    257427.15346836165,
    6689596.994464116
   ],
   "end_xy": [
    257426.60473388454,
    6689599.944648641
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.105,
   "obstruction_max_height_m": 6.95,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "descends_at_start"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "368c60c29e47d4b421849c953b172a04f7694146",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:8c94015b54267da4",
   "python": "3.14.4",
   "numpy": "2.5.3",
   "rasterio": "1.5.2",
   "pyproj": "3.8.0",
   "laspy": "2.7.0",
   "shapely": "2.1.2",
   "pyosmium": "4.3.1",
   "libosmium": "2.23.1",
   "gdal": "3.12.2",
   "proj": "9.8.1",
   "run_id": "no-b05",
   "road_pbf": "no-b05-block-batch-no-b05.osm.pbf",
   "region_key": "norway",
   "crs": "EPSG:25833",
   "elevation_provider_key": "nhm-no",
   "tile_index": "nhm-window",
   "authority": "nvdb",
   "registry_pbf": "norway-2026-10-01.osm.pbf"
  },
  "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
  ],
  "scale_correction": "point",
  "scale_correction_crs": "EPSG:25833",
  "elevation_crs": "EPSG:25833",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/no/nhm-no_dtm_E257000-N6689000_1m.tif",
   "data/cache/no/nhm-no_dtm_E257000-N6689500_1m.tif"
  ],
  "calculated_at": "2026-10-04T04:30:58+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/no-b05-block-batch-no-b05.osm.pbf",
  "osm_snapshot": "",
  "run_id": "no-b05",
  "elevation_provider": "Kartverket NHM DTM 1 m (laser-covered ground only)",
  "elevation_licence": "CC BY 4.0 \u2014 \u00a9 Kartverket (https://www.kartverket.no/api-og-data/vilkar-for-bruk)",
  "elevation_dataset": "Nasjonal h\u00f8ydemodell (NHM) DTM, 1 m, EPSG:25833, NN2000 (Kartverket), served by the hoydedata.no ImageServer; ground without a laser project is a coarser resampled product and is never measured",
  "elevation_vertical_datum": "NN2000",
  "elevation_tile_ids": [
   "E257000-N6689000",
   "E257000-N6689500"
  ],
  "elevation_blocks": [
   "nhm-dtm-1m"
  ],
  "nhm_laser_projects": [
   {
    "last_flight_date": "2007-01-01",
    "name": "Hadeland 2007",
    "points_per_m2": 0.4,
    "resolution_m": 1,
    "season": "season-unknown",
    "year": 2007
   },
   {
    "last_flight_date": "2015-06-20",
    "name": "Hadeland 2015",
    "points_per_m2": 5,
    "resolution_m": 0.25,
    "season": "",
    "year": 2015
   }
  ],
  "nhm_last_flight_date": "2015-06-20",
  "nhm_flight_season_unknown": [
   "Hadeland 2007"
  ],
  "nhm_retrieved_at": "2026-10-03T19:26:53Z",
  "nhm_note": "laser projects overlapping the route's cells; the mosaic draws on them by its own priority and which project supplied which pixel is not recorded",
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 1,
  "tunnel_check": "osm tunnel=* ways on 1 own way(s)",
  "tunnel_ranges_m": [],
  "underground_fraction": 0.0,
  "carriageway": {
   "stations": 16,
   "stations_resolved": 16,
   "width_median_m": 4.62,
   "width_p10_m": 3.25,
   "width_min_m": 3.25,
   "width_max_m": 8.75,
   "bounded_share": 0.438,
   "unbounded_share": 0.562,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.25,
   "window_m": [
    182.0,
    207.0
   ],
   "width_at_max25_m": 4.75,
   "window_stations": 7,
   "single_track": false,
   "single_track_rule": "PROVISIONAL (2026-09-15): width_p10_m <= 3.0 m with bounded_share >= 0.6; recorded, not a rule",
   "status": "ok",
   "source": "dtm",
   "station_m": 25.0,
   "window_station_m": 5.0,
   "halfwidth_m": 6.0,
   "step_m": 0.25,
   "level_tol_m": 0.12,
   "break_min_m": 0.3,
   "stations_failed": 0,
   "hedge_to_hedge": {
    "stations": 16,
    "stations_resolved": 16,
    "width_median_m": 5.25,
    "width_p10_m": 2.0,
    "width_min_m": 1.25,
    "width_max_m": 9.5,
    "bounded_share": 0.812,
    "unbounded_share": 0.188,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.0,
    "window_m": [
     182.0,
     207.0
    ],
    "width_at_max25_m": 6.5,
    "window_stations": 7,
    "status": "ok",
    "source": "dsm",
    "station_m": 25.0,
    "window_station_m": 5.0,
    "halfwidth_m": 6.0,
    "step_m": 0.25,
    "level_tol_m": 0.5,
    "break_min_m": 0.3,
    "stations_failed": 0
   }
  },
  "unmapped_bridge_span_unstable": {
   "start_m": 8.0,
   "end_m": 186.0,
   "span_m": 178.0,
   "floor_at_m": 56.0,
   "depth_m": 11.1,
   "drop_m": 2.1,
   "surface": "raw",
   "window_start_m": 182.0,
   "window_end_m": 207.0,
   "gap_m": 0.0,
   "unstable": true,
   "perturbation_hits": 2,
   "perturbations": [
    0.0,
    0.3333,
    0.6667
   ],
   "ruling": "the dip is not found at every sampling phase \u2014 reported, never held on (Peter 2026-09-20, suppression-verdict-stability)",
   "note": "A dip of 2 m below the road between 8 m and 186 m is found at some sampling phases and not others (2 of 3). Reported for a person; the page is NOT held on it (suppression-verdict-stability, Peter 2026-09-20)."
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Lunner",
  "county": "Akershus",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}