The method to determine position in 3D digital sand table

This paper proposes a method to determine the working position in the 3D digital sand table. Starting from analyzing the actual business of the 3D digital sand table to propose the operation cases and build the algorithm to determine the position for each of those cases. Then, the presentation of the application of that method to specific functions of the GlobeDesktop system. Finally, the paper presents experimental content to evaluate the method.