{
 "ocl_version": "0.1.0",
 "name": "Borvigveien",
 "slug": "borvigveien",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 35.047437759443234,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 250.0,
   "end_distance_m": 252.0,
   "start_elevation_m": 22.83448907101127,
   "end_elevation_m": 23.535437826200134,
   "min_gradient_pct": -9.770764997345616
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.653464455372077,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 249.0,
   "end_distance_m": 252.0,
   "start_elevation_m": 22.58583389253897,
   "end_elevation_m": 23.535437826200134,
   "min_gradient_pct": -7.7254210312827825
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.149929984166953,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 197.0,
   "end_distance_m": 202.0,
   "start_elevation_m": 12.585592707506764,
   "end_elevation_m": 13.743089206715112,
   "min_gradient_pct": -6.106128554305608
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.70640111659384,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 197.0,
   "end_distance_m": 207.0,
   "start_elevation_m": 12.585592707506764,
   "end_elevation_m": 14.856232819166149,
   "min_gradient_pct": -3.7594653556176594
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.09133443101735,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 196.0,
   "end_distance_m": 216.0,
   "start_elevation_m": 12.377312617460122,
   "end_elevation_m": 16.795579503663593,
   "min_gradient_pct": -3.1023617002826165
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.848916589513454,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 189.0,
   "end_distance_m": 214.0,
   "start_elevation_m": 10.917143466308994,
   "end_elevation_m": 16.37937261368736,
   "min_gradient_pct": -2.721392117683852
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.022029958426906,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 170.0,
   "end_distance_m": 220.0,
   "start_elevation_m": 7.062526240037195,
   "end_elevation_m": 17.573541219250647,
   "min_gradient_pct": -2.2025493064707877
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.68192570164682,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 152.0,
   "end_distance_m": 252.0,
   "start_elevation_m": 3.8535121245533164,
   "end_elevation_m": 23.535437826200134,
   "min_gradient_pct": -1.2899729195342835
  }
 ],
 "shape": {
  "ascent_concentration": 0.58,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 120.0,
  "shape_class": "stepped"
 },
 "length_m": 277.8253392537928,
 "start_elevation_m": 1.7766330026930943,
 "end_elevation_m": 24.441587489472134,
 "endpoint_gain_m": 22.66495448677904,
 "overall_gradient_pct": 8.15798679402481,
 "accumulated_ascent_m": 24.68314265082375,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.149929984166953,
   "start_distance_m": 197.0,
   "end_distance_m": 202.0,
   "midpoint_distance_m": 199.5,
   "start_elevation_m": 12.585592707506764,
   "end_elevation_m": 13.743089206715112,
   "start_xy": [
    29305.711879575578,
    6463251.709820926
   ],
   "end_xy": [
    29310.16656595033,
    6463254.005852002
   ]
  },
  "max_10m": {
   "gradient_pct": 22.70640111659384,
   "start_distance_m": 197.0,
   "end_distance_m": 207.0,
   "midpoint_distance_m": 202.0,
   "start_elevation_m": 12.585592707506764,
   "end_elevation_m": 14.856232819166149,
   "start_xy": [
    29305.711879575578,
    6463251.709820926
   ],
   "end_xy": [
    29314.621252325083,
    6463256.301883076
   ]
  },
  "max_20m": {
   "gradient_pct": 22.09133443101735,
   "start_distance_m": 196.0,
   "end_distance_m": 216.0,
   "midpoint_distance_m": 206.0,
   "start_elevation_m": 12.377312617460122,
   "end_elevation_m": 16.795579503663593,
   "start_xy": [
    29304.820942300626,
    6463251.250614711
   ],
   "end_xy": [
    29322.639687799638,
    6463260.434739012
   ]
  },
  "max_25m": {
   "gradient_pct": 21.848916589513454,
   "start_distance_m": 189.0,
   "end_distance_m": 214.0,
   "midpoint_distance_m": 201.5,
   "start_elevation_m": 10.917143466308994,
   "end_elevation_m": 16.37937261368736,
   "start_xy": [
    29298.40114323185,
    6463248.432742804
   ],
   "end_xy": [
    29320.85781324974,
    6463259.516326582
   ]
  },
  "max_50m": {
   "gradient_pct": 21.022029958426906,
   "start_distance_m": 170.0,
   "end_distance_m": 220.0,
   "midpoint_distance_m": 195.0,
   "start_elevation_m": 7.062526240037195,
   "end_elevation_m": 17.573541219250647,
   "start_xy": [
    29280.78535928358,
    6463241.19677034
   ],
   "end_xy": [
    29326.20343689944,
    6463262.271563872
   ]
  },
  "max_100m": {
   "gradient_pct": 19.68192570164682,
   "start_distance_m": 152.0,
   "end_distance_m": 252.0,
   "midpoint_distance_m": 202.0,
   "start_elevation_m": 3.8535121245533164,
   "end_elevation_m": 23.535437826200134,
   "start_xy": [
    29264.796142533312,
    6463232.996472764
   ],
   "end_xy": [
    29349.874700615477,
    6463282.903021062
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.106128554305608,
   "start_distance_m": 19.0,
   "end_distance_m": 24.0,
   "midpoint_distance_m": 21.5,
   "start_elevation_m": 2.6862014409939743,
   "end_elevation_m": 2.380895013278694,
   "start_xy": [
    29175.46395005785,
    6463142.742854425
   ],
   "end_xy": [
    29180.251305336227,
    6463144.225184537
   ]
  },
  "min_10m": {
   "gradient_pct": -3.7594653556176594,
   "start_distance_m": 78.0,
   "end_distance_m": 88.0,
   "midpoint_distance_m": 83.0,
   "start_elevation_m": 1.9533604424129476,
   "end_elevation_m": 1.5774139068511817,
   "start_xy": [
    29224.290489984716,
    6463172.541413045
   ],
   "end_xy": [
    29228.25069139349,
    6463181.742361855
   ]
  },
  "min_20m": {
   "gradient_pct": -3.1023617002826165,
   "start_distance_m": 72.0,
   "end_distance_m": 92.0,
   "midpoint_distance_m": 82.0,
   "start_elevation_m": 2.103368838633716,
   "end_elevation_m": 1.4828964985771926,
   "start_xy": [
    29221.96016164696,
    6463166.997346647
   ],
   "end_xy": [
    29230.347212536268,
    6463185.159797203
   ]
  },
  "min_25m": {
   "gradient_pct": -2.721392117683852,
   "start_distance_m": 70.0,
   "end_distance_m": 95.0,
   "midpoint_distance_m": 82.5,
   "start_elevation_m": 2.1256801992619625,
   "end_elevation_m": 1.4453321698409995,
   "start_xy": [
    29220.59474740538,
    6463165.583256374
   ],
   "end_xy": [
    29231.919603393355,
    6463187.722873713
   ]
  },
  "min_50m": {
   "gradient_pct": -2.2025493064707877,
   "start_distance_m": 42.0,
   "end_distance_m": 92.0,
   "midpoint_distance_m": 67.0,
   "start_elevation_m": 2.5841711518125865,
   "end_elevation_m": 1.4828964985771926,
   "start_xy": [
    29197.017432726814,
    6463150.744636787
   ],
   "end_xy": [
    29230.347212536268,
    6463185.159797203
   ]
  },
  "min_100m": {
   "gradient_pct": -1.2899729195342835,
   "start_distance_m": 16.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 66.0,
   "start_elevation_m": 2.663110616477076,
   "end_elevation_m": 1.3731376969427926,
   "start_xy": [
    29172.591536890817,
    6463141.853456358
   ],
   "end_xy": [
    29240.194898432906,
    6463206.934340684
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 35.047437759443234,
   "start_distance_m": 250.0,
   "end_distance_m": 252.0,
   "midpoint_distance_m": 251.0,
   "start_elevation_m": 22.83448907101127,
   "end_elevation_m": 23.535437826200134,
   "start_xy": [
    29348.840196611993,
    6463281.200422877
   ],
   "end_xy": [
    29349.874700615477,
    6463282.903021062
   ]
  },
  "max_3m": {
   "gradient_pct": 31.653464455372077,
   "start_distance_m": 249.0,
   "end_distance_m": 252.0,
   "midpoint_distance_m": 250.5,
   "start_elevation_m": 22.58583389253897,
   "end_elevation_m": 23.535437826200134,
   "start_xy": [
    29348.26055802032,
    6463280.382707754
   ],
   "end_xy": [
    29349.874700615477,
    6463282.903021062
   ]
  }
 },
 "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": 0.154,
   "obstruction_max_height_m": 12.58,
   "flagged_windows_m": [
    25
   ]
  },
  "review": [],
  "extent": []
 },
 "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-b01",
   "road_pbf": "no-b01-block-batch-no-b01.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_E29000-N6463000_1m.tif"
  ],
  "calculated_at": "2026-10-03T19:38:58+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/no-b01-block-batch-no-b01.osm.pbf",
  "osm_snapshot": "",
  "run_id": "no-b01",
  "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": [
   "E29000-N6463000"
  ],
  "elevation_blocks": [
   "nhm-dtm-1m"
  ],
  "nhm_laser_projects": [
   {
    "last_flight_date": "2009-01-01",
    "name": "Farsund Lyngdal 2009",
    "points_per_m2": 1.8,
    "resolution_m": 1,
    "season": "season-unknown",
    "year": 2009
   },
   {
    "last_flight_date": "2017-05-05",
    "name": "NDH Farsund-Lyngdal-H\u00e6gebostad 5pkt 2017",
    "points_per_m2": 5,
    "resolution_m": 0.25,
    "season": "",
    "year": 2017
   }
  ],
  "nhm_last_flight_date": "2017-05-05",
  "nhm_flight_season_unknown": [
   "Farsund Lyngdal 2009"
  ],
  "nhm_retrieved_at": "2026-10-03T17:18:36Z",
  "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": 18,
   "stations_resolved": 18,
   "width_median_m": 4.12,
   "width_p10_m": 2.92,
   "width_min_m": 2.75,
   "width_max_m": 11.75,
   "bounded_share": 0.278,
   "unbounded_share": 0.722,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.25,
   "window_m": [
    189.0,
    214.0
   ],
   "width_at_max25_m": 3.25,
   "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": 18,
    "stations_resolved": 18,
    "width_median_m": 5.38,
    "width_p10_m": 1.85,
    "width_min_m": 1.25,
    "width_max_m": 11.0,
    "bounded_share": 0.889,
    "unbounded_share": 0.111,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.88,
    "window_m": [
     189.0,
     214.0
    ],
    "width_at_max25_m": 3.75,
    "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
   }
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Lyngdal",
  "county": "Agder",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}