New SRTM15+ Global Bathymetry and Topography Dataset Released

Jan 26, 2021

OpenTopography is pleased to announce the release of the SRTM15+ V2.1 global bathymetry and topography dataset. This dataset is the latest iteration of the SRTM+ digital elevation model (DEM) where the "plus" indicates the addition of ocean bathymetry from shipboard soundings and satellite-derived predicted depths. This DEM is a global elevation grid with a spatial sampling interval of 15 arc seconds (approximately 500 x 500 m pixel size at the equator). New data consists of >33.6 million multibeam and singlebeam measurements collated by several institutions.

For more information on this dataset, see its associated publication:
Tozer, B, Sandwell, D. T., Smith, W. H. F., Olson, C., Beale, J. R., & Wessel, P. (2019). Global bathymetry and topography at 15 arc sec: SRTM15+. Earth and Space Science, 6, 1847.

or visit the project website for more details.

Get the data:

Mediterranean Bathymetry
Colored Digital Elevation Model (DEM) of the Mediterranean Sea draped on Google Earth imagery

Hawaii Archipelago
Colored Digital Elevation Model of the Hawaiian Archipelago and its bathymetry draped on Google Earth imagery