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Lane near Pointe du Rossignol (43.1502, 6.3994)

Mixed surface (33% unpaved) · ranked

425.2 m · net rise 70.3 m · overall 16.5% · evidence quality A (high) · Le Lavandou · Var

Shape: sustained — 32% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 141 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 IGN’s BD TOPO® road network, OpenStreetMap and the classified LiDAR HD point cloud, 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.

Lane near Pointe du Rossignol (43.1502, 6.3994) (Le Lavandou, Var) is 425.2 m long at 16.5% overall; its steepest 25 m averages 28.4% and its steepest 100 m 21.3%, measured from IGN's LiDAR HD 0.5 m laser surveys along the mapped road centreline.

Gradient ladder what do windows mean?

WindowMaximumLocated at
2 m (diagnostic)36%347–349 m
3 m (diagnostic)34%346–349 m
5 m33%344–349 m
10 m31%339–349 m
20 m29.7%337–357 m
25 m28.4%336–361 m
50 m23.7%335–385 m
100 m21.3%325–425 m

may start earliermay 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: mixed (33% unpaved), according to BD TOPO®, IGN's national topographic database: paved for the first 281 m; unpaved from 281 m to the top. The steepest 25 m lies on the unpaved part.

Access: Ranked 2026-10-24: IGN BD TOPO carries 100% of the route as public road (0% restricted), which answers the OSM audit question (unnamed service way, untagged surface).

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 © IGN, BD ORTHO® (Licence Ouverte Etalab 2.0)

Lane near Pointe du Rossignol (43.1502, 6.3994) 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 Pointe du Rossignol (43.1502, 6.3994) elevation profile
Lane near Pointe du Rossignol (43.1502, 6.3994) rolling gradient profile
 

Measurement card

ElevationIGN LiDAR HD MNT 0.5 m — LiDAR HD — MNT (sol) et MNS (surface), 0,50 m (Institut national de l'information géographique et forestière), RGF93 / Lambert-93 EPSG:2154, altitudes IGN69
Resolution / CRS0.5 m grid, EPSG:2154; sampled every 1.0 m, bilinear interpolation
TilesE976-N6233
Road centrelineOpenStreetMap (local PBF extract)
Quality statusevidence quality A; no review flags; no caveated windows
AnalysisOCL 0.1.0, analysis 0.1.0, run fr-pr7, calculated 2026-09-25

Provenance

{
  "analysis_version": "0.1.0",
  "run_manifest": {
    "manifest_version": "1",
    "code_git_sha": "41205ec4649bb0a4093af76ff34281a5d9a13832",
    "code_git_dirty": "false",
    "analysis_version": "0.1.0",
    "analysis_config_digest": "sha256:8c94015b54267da4",
    "python": "3.14.4",
    "numpy": "2.5.3",
    "rasterio": "1.5.1",
    "pyproj": "3.8.0",
    "laspy": "2.7.0",
    "shapely": "2.1.2",
    "pyosmium": "4.3.1",
    "libosmium": "2.23.1",
    "gdal": "3.12.4",
    "proj": "9.8.1",
    "run_id": "fr-pr7",
    "road_pbf": "block-batch-fr-pr7.osm.pbf",
    "region_key": "france",
    "crs": "EPSG:2154",
    "elevation_provider_key": "ign-lidarhd",
    "tile_index": "wms-grid",
    "authority": "bdtopo",
    "registry_pbf": "france-vosges-2026-09-16.osm.pbf",
    "tile_index_snapshot": "sha256:ba95a0bf562c86eb"
  },
  "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:2154",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
    "data/cache/fr/ign-lidarhd_dtm_E976-N6233_0m5@22LHDQR-2025-03-11.tif"
  ],
  "calculated_at": "2026-09-25T09:17:47+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pr7.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pr7",
  "elevation_provider": "IGN LiDAR HD MNT 0.5 m",
  "elevation_licence": "Licence Ouverte / Open Licence 2.0 (Etalab) \u2014 \u00a9 IGN, LiDAR HD (MNT/MNS), data.geopf.fr; reproduction autoris\u00e9e avec mention de la source et de la date",
  "elevation_dataset": "LiDAR HD \u2014 MNT (sol) et MNS (surface), 0,50 m (Institut national de l'information g\u00e9ographique et foresti\u00e8re), RGF93 / Lambert-93 EPSG:2154, altitudes IGN69",
  "elevation_vertical_datum": "IGN69",
  "elevation_tile_ids": [
    "E976-N6233"
  ],
  "elevation_blocks": [
    "22LHDQR@2025-03-11"
  ],
  "ign_dalles": [
    "LHD_FXX_0976_6234_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
    "22LHDQR"
  ],
  "ign_editions": [
    "2025-03-11"
  ],
  "ign_dsm_edition": {
    "LHD_FXX_0976_6234_MNT_O_0M50_LAMB93_IGN69": "2025-03-11"
  },
  "route_cut_m": 425.2,
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
    "stations": 24,
    "stations_resolved": 24,
    "width_median_m": 4.25,
    "width_p10_m": 3.5,
    "width_min_m": 1.5,
    "width_max_m": 10.0,
    "bounded_share": 0.625,
    "unbounded_share": 0.375,
    "confidence_median": 0.557,
    "width_median_bounded_m": 4.0,
    "window_m": [
      336.0,
      361.0
    ],
    "width_at_max25_m": 4.0,
    "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": 24,
      "stations_resolved": 24,
      "width_median_m": 5.0,
      "width_p10_m": 2.33,
      "width_min_m": 1.25,
      "width_max_m": 9.25,
      "bounded_share": 0.792,
      "unbounded_share": 0.208,
      "confidence_median": 1.0,
      "width_median_bounded_m": 4.5,
      "window_m": [
        336.0,
        361.0
      ],
      "width_at_max25_m": 5.0,
      "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"
}