| --- |
| license: other |
| license_name: copernicus-dem-eula |
| license_link: https://spacedata.copernicus.eu/documents/20123/121286/CSCDA_ESA_Mission-specific+Annex.pdf |
| pretty_name: World Copernicus 30 m DEM (Cloud-Optimized GeoTIFF) |
| tags: |
| - geospatial |
| - dem |
| - digital-elevation-model |
| - elevation |
| - raster |
| - cog |
| - cloud-optimized-geotiff |
| - copernicus |
| - earth-observation |
| --- |
| |
| # World Copernicus 30 m DEM — Cloud-Optimized GeoTIFF |
|
|
| A single-file, global **digital elevation model** at ~30 m resolution, packaged as a |
| **Cloud-Optimized GeoTIFF (COG)** so it can be read by range request directly from the Hub |
| (no full download needed). Derived from **Copernicus DEM** data. |
|
|
| ## File |
|
|
| | File | Description | |
| |---|---| |
| | `copernicus_world_30m_lerc.cog.tif` | Global 30 m elevation, COG, LERC_ZSTD compressed | |
| |
| ## Raster specification |
| |
| | 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 | |
|
|
| ## Reading without downloading |
|
|
| The COG layout + overviews let clients stream only the tiles/zoom they need. |
|
|
| **GDAL (vsicurl):** |
| ```bash |
| gdalinfo /vsicurl/https://huggingface.co/datasets/OneAvailableUsername/worldcog/resolve/main/copernicus_world_30m_lerc.cog.tif |
| ``` |
|
|
| **Python (rasterio):** |
| ```python |
| import rasterio |
| url = "https://huggingface.co/datasets/OneAvailableUsername/worldcog/resolve/main/copernicus_world_30m_lerc.cog.tif" |
| with rasterio.open(url) as src: |
| print(src.profile) |
| # windowed read of a small AOI, only the needed tiles are fetched |
| window = rasterio.windows.from_bounds(144.9, -37.9, 145.1, -37.7, src.transform) |
| elev = src.read(1, window=window) |
| ``` |
|
|
| ## Notes |
|
|
| - Values are ellipsoidal/orthometric elevations in **meters** as provided by the source Copernicus DEM product. |
| - `LERC_ZSTD` is lossy to a bounded **1 m** vertical error — suitable for visualization and most analysis, not for sub-meter vertical work. |
|
|
| ## Attribution & licence |
|
|
| Produced from **Copernicus DEM** © ESA / European Commission. Use is subject to the |
| Copernicus DEM licence terms — attribute the source when redistributing or publishing |
| derived products. Confirm the exact source product (GLO-30 / GLO-90 / EEA-10) and licence |
| before downstream use. |
|
|
