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Summary: In recent years, with the development of the virtual reality technology and data acquisition technology, people increase thedemand of GIS visualization. Especially accounting for occupying 70 percent of global area, and as a based environmentalvisualization, global ocean visualization is particularly important in some applications. This paper studies the global oceanvisualization and modeling techniques under the framework of the WGS84 ellipsoid and achieves a method of rapid global oceanphotorealistic rendering.  The main research works are as follow: 1. In the height field modeling, with the law of statistical and spectral marine and Phillip wave spectrum, we can produce a singleheight map which considers the wind farm on the ocean wave magnitude of impact; 2. With ellipsoid rectangular grid mapping relationship, the single height map produced above will be mapped to the ellipsoidrepeatedly, and achieve a goal of global ocean height field modeling; 3. With the conversion of screen space coordinate system and the rectangular spatial coordinate system, sampling points can beacquired by the view-dependent ellipsoid; 4. With the introduction of global bathymetric data, and came through the GPU for rapid sampling, so that we can get samplingpoints related to transparency and depth values to achieve a global ocean and land border processing

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

Global ocean modeling and rendering techniques based on ellipsoid Rectangular grid mapping