LIVING SURVEY — measurements are reviewed continuously as new data and local evidence arrive. Seen a sign, a gate, or a better name? Submit an update no account needed · photos welcome via GitHub

← all climbs

Lane near Krumbach

Surface unknown — likely unpaved · ranked

982.1 m · net rise 129.5 m · overall 13.2% · evidence quality B (good) · Eibiswald · Steiermark

Shape: sustained — 34% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 307 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 GIP.at 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 58% 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.

Lane near Krumbach (Eibiswald, Steiermark) is 982.1 m long at 13.2% overall; its steepest 25 m averages ≈21.2% and its steepest 100 m ≈20.2%, measured from Austria's national 1 m airborne-laser terrain model along the mapped road centreline.

Gradient ladder what do windows mean?

WindowMaximumLocated at
2 m (diagnostic)≈23%435–437 munder overhead cover terrain reads 29.7% at 203–205 m across a structure and terrain that holds no road surface (dense canopy, no bench) — excluded
3 m (diagnostic)≈22%434–437 munder overhead cover terrain reads 28.3% at 202–205 m across a structure and terrain that holds no road surface (dense canopy, no bench) — excluded
5 m≈22%386–391 munder overhead cover terrain reads 25.9% at 188–193 m across terrain that holds no road surface (dense canopy, no bench) — excluded
10 m≈22%387–397 munder overhead cover terrain reads 24.1% at 196–206 m across terrain that holds no road surface (dense canopy, no bench) — excluded
20 m≈21.4%380–400 munder overhead cover terrain reads 23.6% at 186–206 m across terrain that holds no road surface (dense canopy, no bench) — excluded
25 m≈21.2%384–409 munder overhead cover terrain reads 22.9% at 181–206 m across a structure and terrain that holds no road surface (dense canopy, no bench) — excluded
50 m≈20.7%371–421 munder overhead cover
100 m≈20.2%366–466 munder overhead cover

may continue beyond end 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: GIP.at, Austria's official transport graph records no surface for this road; the map may tell you more.

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 · aerial imagery © basemap.at (CC BY 4.0)

Lane near Krumbach 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).

Lane near Krumbach elevation profile
Lane near Krumbach rolling gradient profile
 

Measurement card

ElevationBEV ALS DTM 1 m — ALS DTM Höhenraster 1 m (Bundesamt für Eich- und Vermessungswesen with the Länder), EPSG:3035
Resolution / CRS1.0 m grid, EPSG:3035; sampled every 1.0 m, bilinear interpolation
TilesE4709-N2634, E4710-N2634
Road centrelineOpenStreetMap (local PBF extract)
Quality statusevidence quality B; caveated windows: canopy or structure, no bench excluded
AnalysisOCL 0.1.0, analysis 0.1.0, run ef261007-fus-mean-at1, calculated 2026-10-07

Provenance

{
  "analysis_version": "0.1.0",
  "run_manifest": {
    "manifest_version": "1",
    "code_git_sha": "06237a00d8cad9ff7e3fb0457285d1df5726599e",
    "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": "ef261007-fus-mean-at1",
    "road_pbf": "batch-austria-chunk002.pbf",
    "region_key": "austria",
    "crs": "EPSG:3035",
    "elevation_provider_key": "bev-als",
    "tile_index": "cog-grid",
    "authority": "gip",
    "registry_pbf": "austria-2026-09-11.osm.pbf",
    "tile_index_snapshot": "sha256:41caef11a32bc092"
  },
  "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:3035",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
    "data/cache/at/bev-als_dtm_E4709-N2634@20250915.tif",
    "data/cache/at/bev-als_dtm_E4710-N2634@20250915.tif"
  ],
  "calculated_at": "2026-10-07T13:03:49+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/ef261007-fus-mean-at1/at/batch-austria-chunk002.pbf",
  "osm_snapshot": "",
  "run_id": "ef261007-fus-mean-at1",
  "edition_pin": {
    "catalogue_only": true
  },
  "elevation_provider": "BEV ALS DTM 1 m",
  "elevation_licence": "Creative Commons Attribution 4.0 (CC BY 4.0) \u2014 \u00a9 BEV / L\u00e4nder, data.gv.at",
  "elevation_dataset": "ALS DTM H\u00f6henraster 1 m (Bundesamt f\u00fcr Eich- und Vermessungswesen with the L\u00e4nder), EPSG:3035",
  "elevation_tile_ids": [
    "E4709-N2634",
    "E4710-N2634"
  ],
  "elevation_blocks": [
    "N2600000E4700000@2025-09-15"
  ],
  "bev_dsm_release": {
    "N2600000E4700000": "20250915"
  },
  "climb_origin": "discovered",
  "seam_filled_samples": {
    "count": 0,
    "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "edition_fusion": {
    "method": "mean",
    "method_version": "edition-fusion-1.0",
    "class": "agree-mean",
    "sources": [
      {
        "role": "older (shifted onto the newer datum)",
        "dataset": "BEV ALS DTM 1 m",
        "edition": "BEV 2022-09-15",
        "flight_year": null,
        "tile_ids": [
          "data/cache/at/bev-als_dtm_E4709-N2634@20220915.tif",
          "data/cache/at/bev-als_dtm_E4710-N2634@20220915.tif"
        ],
        "content_sha256": null
      },
      {
        "role": "newer (datum)",
        "dataset": "BEV ALS DTM 1 m",
        "edition": "BEV 2025-09-15",
        "flight_year": null,
        "tile_ids": [
          "data/cache/at/bev-als_dtm_E4709-N2634@20250915.tif",
          "data/cache/at/bev-als_dtm_E4710-N2634@20250915.tif"
        ],
        "content_sha256": null
      }
    ],
    "weights": {
      "older": 0.5,
      "newer": 0.5
    },
    "datum": "newer edition",
    "datum_offset_m": 0.0001,
    "disagreement": {
      "window_m": 25.0,
      "window_start_m": 384.0,
      "gradient_older_pct": 21.381,
      "gradient_newer_pct": 20.994,
      "gradient_difference_pp": -0.387,
      "agree_threshold_pp": 0.6,
      "agree": true
    },
    "note": "equal-weight mean of the two datum-aligned editions; the editions agree within 0.6 pp at the headline window (-0.39 pp)",
    "obstruction": {
      "window_m": 25.0,
      "older_window_obstructed": true,
      "newer_window_obstructed": true,
      "older_obstructed_fraction": 0.431,
      "newer_obstructed_fraction": 0.576,
      "field": "quality_summary.overhead_obstruction.flagged_windows_m / obstructed_fraction"
    },
    "error_basis": "edition-fusion-study-261007 step 2: three-cornered hat over 71 independent triples (65 at): older edition 2.4 cm, newer 2.8 cm robust sigma, effectively equal; mean beat newest on 66 % and oldest on 85 % of 65 at pages",
    "published_max25_pct": 23.26,
    "max25_pct": 21.19,
    "ruling": "(chat, 'yes, go ahead with 1-3'), edition fusion study",
    "applied_on": "2026-10-07"
  },
  "structure_own_ways": 1,
  "tunnel_check": "osm tunnel=* ways on 1 own way(s)",
  "tunnel_ranges_m": [],
  "underground_fraction": 0.0,
  "structure_own_ways_source": "map-matched to the road network: the entry carried no way list, so the ways the route runs along were found by geometry (ukclimb.batch.own_ways_by_geometry)",
  "prior_doc": {
    "slug": "discovered-lane-46-7075-15-0846",
    "calculated_at": "2026-09-11T07:16:44+00:00",
    "code_git_sha": null,
    "analysis_version": "0.1.0",
    "run_id": "at-run1-260911",
    "path": "output/er261007-ctl-at1/at/priors/discovered-lane-46-7075-15-0846/discovered-lane-46-7075-15-0846.json",
    "spans": 0,
    "sources": []
  },
  "carriageway": {
    "stations": 46,
    "stations_resolved": 46,
    "width_median_m": 4.0,
    "width_p10_m": 2.38,
    "width_min_m": 2.0,
    "width_max_m": 12.0,
    "bounded_share": 0.413,
    "unbounded_share": 0.587,
    "confidence_median": 0.0,
    "width_median_bounded_m": 4.0,
    "window_m": [
      384.0,
      409.0
    ],
    "width_at_max25_m": 3.75,
    "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": 46,
      "stations_resolved": 46,
      "width_median_m": 2.0,
      "width_p10_m": 1.12,
      "width_min_m": 0.5,
      "width_max_m": 12.0,
      "bounded_share": 0.935,
      "unbounded_share": 0.065,
      "confidence_median": 1.0,
      "width_median_bounded_m": 2.0,
      "window_m": [
        384.0,
        409.0
      ],
      "width_at_max25_m": 2.5,
      "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
    }
  },
  "remeasured": {
    "on": "2026-10-07",
    "why": "(chat, 'yes, go ahead with 1-3'), edition fusion study: equal-weight mean of the two datum-aligned editions",
    "published_max25_pct": 23.26,
    "max25_pct": 21.19
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
}