Applications of 3-D visualizations of oceanographic data bases

Creative use of 2D techniques in oceanographic data analysis has proven sufficient for many tasks of analysis, review, and planning. Often, however, a greater understanding of a data set and reduced analysis time can be achieved by supplementing traditional methods with 3D visualization and display techniques. Virtual-environment visualization of 3D surfaces offers a means to review large ocean areas rapidly as a component of oceanographic data base verification and validation. For this paper, 3D temperature, salinity, and density surfaces are combined with high-resolution models of seafloor bathymetry and supplemented with retrievable alphanumeric markups such as latitudes and longitudes and point values of displayed parameters. These visualizations can enhance considerably the oceanographer's ability to detect and analyze features within the data sets. Applications to quality control of oceanographic data bases and modeled oceanographic fields are described and illustrated. Oceanographic fields for the examples are drawn from the Generalized Digital Environmental Model (GDEM) and the Modular Ocean Data Assimilation System (MODAS). Other potential applications described include sound-speed and density surfaces and oceanographic-feature displays for training, planning, and rehearsal as well as tactical displays for overall improved situational awareness. Examples presented may be viewed and navigated using electro-optical 3D eyewear in the Commander, Naval Meteorology and Oceanography Command booth.