OneAvailableUsername/worldcog

DEM Cloud-Optimized GeoTIFFs

Range-readable Cloud-Optimized GeoTIFF (COG) elevation rasters. Clients stream only the tiles/zoom they need (no full download).

Files

File	Description
copernicus_world_30m_lerc.cog.tif	Global 30 m elevation, COG, LERC_ZSTD
france_dtm_5m_lerc.cog.tif	Metropolitan France 5 m DTM (IGN RGE ALTI derivative), Lambert-93, COG, LERC_ZSTD

Copernicus World 30 m

Property	Value
Dimensions	1,296,005 × 626,400 px
Bands	1 (elevation, Float32, meters)
CRS	EPSG:4326 (WGS 84, geographic)
Pixel size	0.0002777778° ≈ 1 arc-second (~30 m at equator)
Extent	lon −180.0014 → 180.0000, lat −89.9999 → 84.0001
Layout	COG, 512 × 512 internal tiles, BAND interleave
Compression	LERC_ZSTD, MAX_Z_ERROR=1 (≤ 1 m vertical error)
Overviews	11 levels (down to 633 × 306)
NoData	none set

Derived from Copernicus DEM data.

France 5 m DTM

Property	Value
Dimensions	230,000 × 214,000 px
Bands	1 (elevation, Float32, meters)
CRS	EPSG:2154 (RGF93 / Lambert-93)
Pixel size	5 m × 5 m
Extent	94,997.5–1,244,997.5 E, 6,045,002.5–7,115,002.5 N
Layout	COG, 512 × 512 internal tiles, BAND interleave
Compression	LERC_ZSTD, MAX_Z_ERROR=0.01 (≤ 1 cm vertical error)
Overviews	9 levels (down to 449 × 417)
NoData	−99999
Elevation	min −120 m, max 4,779 m, mean 344 m (45% of pixels valid)
Size	~28.3 GB

Metropolitan France including Corsica. Processed as a single COG from IGN RGE ALTI 5 m tiles.

Reading without downloading

GDAL (vsicurl):

gdalinfo /vsicurl/https://huggingface.co/datasets/OneAvailableUsername/worldcog/resolve/main/france_dtm_5m_lerc.cog.tif

Python (rasterio):

import rasterio
url = "https://huggingface.co/datasets/OneAvailableUsername/worldcog/resolve/main/france_dtm_5m_lerc.cog.tif"
with rasterio.open(url) as src:
    print(src.crs, src.res)
    window = rasterio.windows.from_bounds(650000, 6865000, 660000, 6875000, src.transform)
    elev = src.read(1, window=window)

Notes

• Copernicus values are ellipsoidal/orthometric elevations in meters as provided by the source product. LERC_ZSTD there is lossy to a bounded 1 m vertical error — suitable for visualization and most analysis, not for sub-meter vertical work.
• The France DTM uses a 1 cm LERC max-z-error and is the national 5 m surface in Lambert-93.

Attribution & licence

Two source licences apply, one per file:

• copernicus_world_30m_lerc.cog.tif — Copernicus DEM © ESA / European Commission. Use is subject to the Copernicus DEM licence terms. Confirm the exact source product (GLO-30 / GLO-90 / EEA-10) and licence before downstream use.
• france_dtm_5m_lerc.cog.tif — derived from IGN RGE ALTI © IGN. Redistributable under Licence Ouverte / Open Licence 2.0 (Etalab). Attribute IGN.