General Bathymetric Chart of the Oceans Data

This repo holds scripts and docs for the Source.Coop GEBCO dataset.

Documentation

Get and convert data

Examples for getting and converting 2026 data from NetCDF to Cloud Optimised GeoTIFF.

Requires a few software packages and tools, like gdal, unzip, wget and a uv managed Python environment with rasterio and rio-stac plus the aws cli tool.

wget https://dap.ceda.ac.uk/bodc/gebco/global/gebco_2026/ice_surface_elevation/netcdf/GEBCO_2026.zip?download=1 \
 -O GEBCO_2026.zip

unzip GEBCO_2026.zip

gdal_translate GEBCO_2026.nc out.vrt

gdal_translate out.vrt GEBCO_2026.tif \
    -a_srs "EPSG:4326" \
    -of COG \
    -co OVERVIEW_RESAMPLING=AVERAGE -co BLOCKSIZE=512 -co COMPRESS=DEFLATE -co PREDICTOR=2 -co BIGTIFF=YES -co OVERVIEW_COUNT=7

Create a STAC Item

Change values as appropriate, install rasterio and rio-stac, then run the command to create the STAC Item. Manually format, so it's not on a single line.

rio stac \
    --datetime "2026-01-01T00:00:00.000Z" \
    --collection "gebco" \
    --asset-name "gebco" \
    --asset-href "https://data.source.coop/ausantarctic/gebco/GEBCO_2026.tif" \
    --with-proj \
    --with-raster \
    deploy/GEBCO_2026.tif > deploy/GEBCO_2026.stac-item.json

Sync to Source.Coop

Synchronise using the AWS CLI. First get credentials from Source.Coop, export them and then run the below command to sync.

aws s3 sync ./deploy s3://us-west-2.opendata.source.coop/ausantarctic/gebco/ --dryrun