SRTM30_PLUS v8: Global Topography and Bathymetry Model at 1 km Resolution

Global 30-arc second resolution topography and bathymetry data compiled from multiple sources. The dataset was developed by Scripps Institute of Oceanography, UCSD, and reformatted into a single GeoTiff by the eAtlas. It integrates land data from SRTM30 and ICESat, and ocean data calibrated using 298 million edited soundings from sources including NOAA, SIO, and GEBCO.

Use Cases

• Modeling seafloor terrain for oceanographic research based on the integrated bathymetry data.
• Creating global relief maps for visualization using the combined topography and bathymetry grid.
• Conducting coastal zone analysis where land elevation meets ocean depth data.
• Calibrating satellite-gravity models using the described gravity-to-topography ratio methodology.

Strengths

• Integrates data from numerous authoritative sources including 298 million edited soundings.
• Includes multibeam bathymetry data from 287 Scripps expeditions over three decades.
• Provided as a single, ready-to-use GeoTiff file (1.6 GB) with overviews for GIS applications.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• A more recent, higher-resolution version (SRTM15_plus) is noted as available.

Provenance

Source

Scripps Institute of Oceanography, University of California San Diego (UCSD)

Collection Method

Reformatted from 33 original NetCDF files into a single GeoTiff by the eAtlas (NERP TE 13.1).

Freshness

Last updated 2026-07-10 19:34:59.490428; freshness should be verified

Geography

Global