3d Dynamic Terrain Visualization of Island Areas

There are multi-source data in island areas, such as land DEM, bathymetry and sea level data from tidal stations. Different data have different spatial references, especially in vertical datums. To visualize the different data in a system, those data needed to be converted into a same spatial reference. This paper presents a methodology to integrate multi-source data of island areas. To visualize the dynamic sea surface, this paper introduces a numerical tidal harmonic analysis and predication model to calculate the instantaneous sea level of tidal stations. With the discrete sea level points, this paper builds a sea surface DEM of East China Sea by interpolation algorithm. Based on the C++ and OpenGL, this paper offers a 3D visualization system which realizes the realistic 3D terrain visualization of island areas from water to land and the instantaneous shorelines generation. * Corresponding author. [email protected]