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Odreliveien

682.3 m · net rise 82.4 m · total ascent 87.0 m · overall 12.1% · evidence quality B (good) · Farsund · Agder

Shape: sustained — 34% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 67 m.

Found purely from mapping and LiDAR data, and not yet matched against books, race records or lists — it may be well known to locals under a name we've never heard. It was cross-checked against the NVDB road network, OpenStreetMap and a second terrain model, but a discovery can still be an artifact of the terrain model or the map. Treat it as a well-evidenced hypothesis until someone has ridden it. If you know this road, tell us what you found — photographs, corrections and local knowledge all welcome; the map links below let you scout it first.

≈ Overhead cover (tree canopy or structures) spans 93% of this route — detected by comparing the surface model (DSM, treetops and rooftops) against the terrain model (DTM, bare ground). Under cover the bare-ground model is built from fewer laser returns, so metre-scale readings can wobble; maxima whose window sits in a covered zone are marked ≈ below — less certain — the flag does not say whether the true value is higher or lower. Longer windows average over more clean ground and are steadier.

Gradient ladder what do windows mean?

WindowMaximumLocated at
2 m (diagnostic)≈38%555–557 munder overhead cover terrain reads 77.5% at 514–516 m across a structure and terrain that holds no road surface (dense canopy, no bench) — excluded
3 m (diagnostic)≈37%554–557 munder overhead cover terrain reads 73.6% at 514–517 m across a structure and terrain that holds no road surface (dense canopy, no bench) — excluded
5 m≈34%553–558 munder overhead cover terrain reads 66.9% at 512–517 m across a structure and terrain that holds no road surface (dense canopy, no bench) — excluded
10 m≈29%446–456 munder overhead cover terrain reads 58.2% at 507–517 m across a structure and terrain that holds no road surface (dense canopy, no bench) — excluded
20 m≈24.8%437–457 munder overhead cover terrain reads 45.4% at 503–523 m across a structure and terrain that holds no road surface (dense canopy, no bench) — excluded
25 m≈24.3%438–463 munder overhead cover terrain reads 40.4% at 499–524 m across a structure — excluded
50 m≈15.4%36–86 munder overhead cover terrain reads 24.6% at 480–530 m across a structure and terrain that holds no road surface (dense canopy, no bench) — excluded
100 m≈13.0%8–108 munder overhead cover terrain reads 20.3% at 423–523 m across a structure and terrain that holds no road surface (dense canopy, no bench) — excluded

may start earlier Extent detection suggests reviewing where this climb starts/ends.

Map

Check this route yourself: Google Maps route via their router · Street View at the base where coverage exists · geojson.io our exact measured line · OpenTopoMap

This climb's data: OCL JSON — the full gradient ladder, quality flags and provenance in the OpenClimb Ladder format.

Surface: paved throughout, according to NVDB, Norway's National Road Database.

Measured, not vetted. This page records what the laser record shows about the road's shape — nothing more. Nobody has necessarily ridden or inspected this road for the survey, and a page here is not a recommendation and no guarantee that the road is open, surfaced, rideable or safe. Gates, private sections, missing rights of way and hazards do not show up in elevation data. Check access and conditions on the ground and make your own judgment.

Ridden it, or know better? Submit data for this climb no account needed ·

Route colour = gradient over a 25 m window: <10% 10–20% 20–25% ≥25%

Route line = the road surface as the LiDAR survey finds it. Basemap roads are for orientation and may sit a few metres off.

  © OpenStreetMap contributors · topo tiles © OpenTopoMap (CC-BY-SA) · vector tiles OpenFreeMap

Odreliveien LiDAR hillshade map with contours

Profile

The map, profile and gradient chart share one position — move your pointer over them and the marker follows. Colors are the gradient bands; the shaded span is the steepest 25 m. Any 25 m figure is good to about a point either way (why).

Odreliveien elevation profile
Odreliveien rolling gradient profile
 

Measurement card

ElevationKartverket NHM DTM 1 m (laser-covered ground only) — Nasjonal høydemodell (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
Resolution / CRS1.0 m grid, EPSG:25833; sampled every 1.0 m, bilinear interpolation
TilesE17500-N6477500, E17500-N6478000, E18000-N6477500, E18000-N6478000
Road centrelineOpenStreetMap (local PBF extract)
Quality statusevidence quality B; caveated windows: canopy or structure, no bench excluded, no bench excluded min, structure excluded, texture excluded, texture excluded min
AnalysisOCL 0.1.0, analysis 0.1.0, run no-b01, calculated 2026-10-03

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_E17500-N6477500_1m.tif",
    "data/cache/no/nhm-no_dtm_E17500-N6478000_1m.tif",
    "data/cache/no/nhm-no_dtm_E18000-N6477500_1m.tif",
    "data/cache/no/nhm-no_dtm_E18000-N6478000_1m.tif"
  ],
  "calculated_at": "2026-10-03T19:35:09+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": [
    "E17500-N6477500",
    "E17500-N6478000",
    "E18000-N6477500",
    "E18000-N6478000"
  ],
  "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": "2008-01-01",
      "name": "Flekkefjord Farsund 2008",
      "points_per_m2": 2,
      "resolution_m": 0.5,
      "season": "season-unknown",
      "year": 2008
    },
    {
      "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",
    "Flekkefjord Farsund 2008"
  ],
  "nhm_retrieved_at": "2026-10-03T11:56:50Z",
  "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": 34,
    "stations_resolved": 34,
    "width_median_m": 7.62,
    "width_p10_m": 4.33,
    "width_min_m": 2.0,
    "width_max_m": 12.0,
    "bounded_share": 0.029,
    "unbounded_share": 0.971,
    "confidence_median": 0.0,
    "width_median_bounded_m": 2.25,
    "window_m": [
      438.0,
      463.0
    ],
    "width_at_max25_m": 8.75,
    "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": 34,
      "stations_resolved": 34,
      "width_median_m": 1.25,
      "width_p10_m": 0.58,
      "width_min_m": 0.5,
      "width_max_m": 12.0,
      "bounded_share": 0.941,
      "unbounded_share": 0.059,
      "confidence_median": 1.0,
      "width_median_bounded_m": 1.25,
      "window_m": [
        438.0,
        463.0
      ],
      "width_at_max25_m": 1.25,
      "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"
}