Research On The Key Technologies Of3D Visualization Of Seabed Geological Body

In this thesis, the key technologies of3D visualization of seabed geological bodywere researched based on the Kriging spatial interpolation method, according to theapplication requirements for visualization of the undersea environment. Moreover, athree-dimensional environment was developed based on VC++platform andOpenSceneGraph visualization library,which can realize the reconstruction andvisualization of the seabed geological body. The main contents of this thesis includedsuch aspects as following:1. research on the theories of Kriging spatial interpolation methodThe systematic research of geological statistics was conducted, includingregionalized variable, stationarity assumption and the intrinsic hypothesis, variogram,normal distribution, multi-linear regression theory and so on, which set a solidtheoretical foundation for the design and development of Kriging interpolationmethod.2. seabed geological modeling technology research based on Kriging methodBased on the shortcomings of the existing methods of spatial interpolation, thisthesis analyzed, researched and designed a Kriging interpolation method forconstruction of geological body. Furthermore, the Kriging interpolation methodoptimized from grouping of points, reduction of Kriging equation dimension andother aspects. At last, the design of Kriging spatial interpolation method was appliedto construct the3D geological body.3. the design and development of3D visualization system of seabed geologicalbodyBased on the study of seabed geological3D modeling technology, a3Dvisualization system of seabed geological body was designed and developed usingVisual C++development platform and OpenSceneGraph visualization library. In thissystem, undersea geological model, grid model, profile model and drilling model can be constructed and visualized interactively, which can reproduce the topographicalfeatures of seabed surface and characteristics of subsurface geological structures fromdifferent view angles. As a result, the design and development of3D visualizationsystem of seabed geological body can provide a convenient, intuitive and professionalundersea visualization tools for marine scientific research and engineeringdevelopment.