Global Multi Resolution Topography (GMRT) synthesis - global elevation model with continuously expanded bathymetry data.
The GMRT synthesis is a compilation of curated multibeam sonar data collected by scientists and institutions worldwide, processed and seamlessly merged into a regularly-updated global digital elevation model covering land and ocean. Multibeam bathymetry data are unique among the marine geophysical data types in their relevance for a broad range of scientific investigations and non-academic uses, providing fundamental characterization of the physical environment and serving as primary base maps for multidisciplinary programs. While specialist expertise is needed to access, quality control and process multibeam bathymetry data files to generate high-quality bathymetric maps, the GMRT Synthesis provides free open access to bathymetric images and gridded bathymetric data for specialist and non-specialist users alike.
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