{
 "ocl_version": "0.1.0",
 "name": "Gjertrudbakken",
 "slug": "gjertrudbakken",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.39264183266638,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 43.0,
   "end_distance_m": 45.0,
   "start_elevation_m": 7.473016254009433,
   "end_elevation_m": 7.900869090662761,
   "min_gradient_pct": -1.2608758646514895
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 21.103020806756618,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 42.0,
   "end_distance_m": 45.0,
   "start_elevation_m": 7.267778466460062,
   "end_elevation_m": 7.900869090662761,
   "min_gradient_pct": -0.6976740974266704
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 20.949065172296315,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 43.0,
   "end_distance_m": 48.0,
   "start_elevation_m": 7.473016254009433,
   "end_elevation_m": 8.52046951262425,
   "min_gradient_pct": -0.4384292603901585
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.652584946638246,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 38.0,
   "end_distance_m": 48.0,
   "start_elevation_m": 6.4552110179604245,
   "end_elevation_m": 8.52046951262425,
   "min_gradient_pct": 1.294455698557706
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.48036607994764,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 29.0,
   "end_distance_m": 49.0,
   "start_elevation_m": 4.632973930279248,
   "end_elevation_m": 8.729047146268776,
   "min_gradient_pct": 1.9011208195038165
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.165608922731842,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 26.0,
   "end_distance_m": 51.0,
   "start_elevation_m": 4.070074484840607,
   "end_elevation_m": 9.111476715523567,
   "min_gradient_pct": 2.082232319762653
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.866173080625945,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 20.0,
   "end_distance_m": 70.0,
   "start_elevation_m": 3.2842309746718126,
   "end_elevation_m": 11.717317514984785,
   "min_gradient_pct": 2.5255010581340116
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.148256292793297,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 162.0,
   "end_distance_m": 262.0,
   "start_elevation_m": 19.99412731362501,
   "end_elevation_m": 34.142383606418306,
   "min_gradient_pct": 2.9621846963011365
  }
 ],
 "shape": {
  "ascent_concentration": 0.433,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 171.0,
  "shape_class": "sustained"
 },
 "length_m": 618.9269763838906,
 "start_elevation_m": 2.524214577344198,
 "end_elevation_m": 50.61580217877007,
 "endpoint_gain_m": 48.09158760142587,
 "overall_gradient_pct": 7.770155355386703,
 "accumulated_ascent_m": 48.205688907504225,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 20.949065172296315,
   "start_distance_m": 43.0,
   "end_distance_m": 48.0,
   "midpoint_distance_m": 45.5,
   "start_elevation_m": 7.473016254009433,
   "end_elevation_m": 8.52046951262425,
   "start_xy": [
    62722.63944123136,
    6810367.00036865
   ],
   "end_xy": [
    62727.62775379835,
    6810367.379060655
   ]
  },
  "max_10m": {
   "gradient_pct": 20.652584946638246,
   "start_distance_m": 38.0,
   "end_distance_m": 48.0,
   "midpoint_distance_m": 43.0,
   "start_elevation_m": 6.4552110179604245,
   "end_elevation_m": 8.52046951262425,
   "start_xy": [
    62717.629802034346,
    6810367.028400927
   ],
   "end_xy": [
    62727.62775379835,
    6810367.379060655
   ]
  },
  "max_20m": {
   "gradient_pct": 20.48036607994764,
   "start_distance_m": 29.0,
   "end_distance_m": 49.0,
   "midpoint_distance_m": 39.0,
   "start_elevation_m": 4.632973930279248,
   "end_elevation_m": 8.729047146268776,
   "start_xy": [
    62708.61717092979,
    6810366.847758105
   ],
   "end_xy": [
    62728.6236010301,
    6810367.4894186435
   ]
  },
  "max_25m": {
   "gradient_pct": 20.165608922731842,
   "start_distance_m": 26.0,
   "end_distance_m": 51.0,
   "midpoint_distance_m": 38.5,
   "start_elevation_m": 4.070074484840607,
   "end_elevation_m": 9.111476715523567,
   "start_xy": [
    62705.61458054391,
    6810366.70821692
   ],
   "end_xy": [
    62730.615295493604,
    6810367.71013462
   ]
  },
  "max_50m": {
   "gradient_pct": 16.866173080625945,
   "start_distance_m": 20.0,
   "end_distance_m": 70.0,
   "midpoint_distance_m": 45.0,
   "start_elevation_m": 3.2842309746718126,
   "end_elevation_m": 11.717317514984785,
   "start_xy": [
    62699.609399772125,
    6810366.429134548
   ],
   "end_xy": [
    62748.14442841857,
    6810374.402103253
   ]
  },
  "max_100m": {
   "gradient_pct": 14.148256292793297,
   "start_distance_m": 162.0,
   "end_distance_m": 262.0,
   "midpoint_distance_m": 212.0,
   "start_elevation_m": 19.99412731362501,
   "end_elevation_m": 34.142383606418306,
   "start_xy": [
    62800.098174978324,
    6810449.659119035
   ],
   "end_xy": [
    62889.866867963545,
    6810491.24706791
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.4384292603901585,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 2.524214577344198,
   "end_elevation_m": 2.50229311432469,
   "start_xy": [
    62679.923,
    6810363.591
   ],
   "end_xy": [
    62684.644139749245,
    6810365.229395662
   ]
  },
  "min_10m": {
   "gradient_pct": 1.294455698557706,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 2.524214577344198,
   "end_elevation_m": 2.6536601471999686,
   "start_xy": [
    62679.923,
    6810363.591
   ],
   "end_xy": [
    62689.60273178869,
    6810365.943295297
   ]
  },
  "min_20m": {
   "gradient_pct": 1.9011208195038165,
   "start_distance_m": 564.0,
   "end_distance_m": 584.0,
   "midpoint_distance_m": 574.0,
   "start_elevation_m": 49.24800286857364,
   "end_elevation_m": 49.628227032474406,
   "start_xy": [
    63109.49552420689,
    6810694.317481915
   ],
   "end_xy": [
    63125.07220796227,
    6810706.903228466
   ]
  },
  "min_25m": {
   "gradient_pct": 2.082232319762653,
   "start_distance_m": 559.0,
   "end_distance_m": 584.0,
   "midpoint_distance_m": 571.5,
   "start_elevation_m": 49.10766895253374,
   "end_elevation_m": 49.628227032474406,
   "start_xy": [
    63105.86559734893,
    6810690.864845715
   ],
   "end_xy": [
    63125.07220796227,
    6810706.903228466
   ]
  },
  "min_50m": {
   "gradient_pct": 2.5255010581340116,
   "start_distance_m": 549.0,
   "end_distance_m": 599.0,
   "midpoint_distance_m": 574.0,
   "start_elevation_m": 48.80224437751952,
   "end_elevation_m": 50.06499490658653,
   "start_xy": [
    63098.60574363301,
    6810683.959573316
   ],
   "end_xy": [
    63137.37839276255,
    6810715.525989353
   ]
  },
  "min_100m": {
   "gradient_pct": 2.9621846963011365,
   "start_distance_m": 518.0,
   "end_distance_m": 618.0,
   "midpoint_distance_m": 568.0,
   "start_elevation_m": 47.687012837902664,
   "end_elevation_m": 50.6491975342038,
   "start_xy": [
    63075.68771730168,
    6810663.002277156
   ],
   "end_xy": [
    63154.04497013753,
    6810724.452343203
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.39264183266638,
   "start_distance_m": 43.0,
   "end_distance_m": 45.0,
   "midpoint_distance_m": 44.0,
   "start_elevation_m": 7.473016254009433,
   "end_elevation_m": 7.900869090662761,
   "start_xy": [
    62722.63944123136,
    6810367.00036865
   ],
   "end_xy": [
    62724.64021210309,
    6810367.047986691
   ]
  },
  "max_3m": {
   "gradient_pct": 21.103020806756618,
   "start_distance_m": 42.0,
   "end_distance_m": 45.0,
   "midpoint_distance_m": 43.5,
   "start_elevation_m": 7.267778466460062,
   "end_elevation_m": 7.900869090662761,
   "start_xy": [
    62721.63751339196,
    6810367.005975105
   ],
   "end_xy": [
    62724.64021210309,
    6810367.047986691
   ]
  }
 },
 "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": 0.008,
   "obstruction_max_height_m": 5.72,
   "flagged_windows_m": []
  },
  "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-b06",
   "road_pbf": "no-b06-block-batch-no-b06.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_E62500-N6810000_1m.tif",
   "data/cache/no/nhm-no_dtm_E62500-N6810500_1m.tif",
   "data/cache/no/nhm-no_dtm_E63000-N6810000_1m.tif",
   "data/cache/no/nhm-no_dtm_E63000-N6810500_1m.tif"
  ],
  "calculated_at": "2026-10-03T19:30:48+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/no-b06-block-batch-no-b06.osm.pbf",
  "osm_snapshot": "",
  "run_id": "no-b06",
  "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": [
   "E62500-N6810000",
   "E62500-N6810500",
   "E63000-N6810000",
   "E63000-N6810500"
  ],
  "elevation_blocks": [
   "nhm-dtm-1m"
  ],
  "nhm_laser_projects": [
   {
    "last_flight_date": "2017-09-16",
    "name": "NDH Balestrand-Leikanger-Sogndal-Fj\u00e6rland 5pkt 2017",
    "points_per_m2": 5,
    "resolution_m": 0.25,
    "season": "",
    "year": 2017
   },
   {
    "last_flight_date": "2016-10-11",
    "name": "NDH Leikanger-Sogndal 2pkt 2016",
    "points_per_m2": 2,
    "resolution_m": 0.5,
    "season": "",
    "year": 2016
   },
   {
    "last_flight_date": "2021-01-01",
    "name": "RV13 Skare-Sogndal mobil 2021",
    "points_per_m2": 100,
    "resolution_m": 0.25,
    "season": "season-unknown",
    "year": 2021
   },
   {
    "last_flight_date": "2009-01-01",
    "name": "Sogn og Fjordane 2009",
    "points_per_m2": 2,
    "resolution_m": 0.5,
    "season": "season-unknown",
    "year": 2009
   }
  ],
  "nhm_last_flight_date": "2017-09-16",
  "nhm_flight_season_unknown": [
   "RV13 Skare-Sogndal mobil 2021",
   "Sogn og Fjordane 2009"
  ],
  "nhm_retrieved_at": "2026-10-03T09:02:51Z",
  "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": 31,
   "stations_resolved": 31,
   "width_median_m": 6.5,
   "width_p10_m": 3.75,
   "width_min_m": 2.5,
   "width_max_m": 12.0,
   "bounded_share": 0.097,
   "unbounded_share": 0.903,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.75,
   "window_m": [
    26.0,
    51.0
   ],
   "width_at_max25_m": 5.0,
   "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": 31,
    "stations_resolved": 31,
    "width_median_m": 9.75,
    "width_p10_m": 4.75,
    "width_min_m": 2.25,
    "width_max_m": 12.0,
    "bounded_share": 0.419,
    "unbounded_share": 0.581,
    "confidence_median": 0.0,
    "width_median_bounded_m": 5.5,
    "window_m": [
     26.0,
     51.0
    ],
    "width_at_max25_m": 8.5,
    "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
   }
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Sogndal",
  "county": "Vestland",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}