In order to study the rule of deformation prediction of coal mining subsidence in three-dimensional space, it is necessary to establish a three-dimensional geological model. This paper introduced the idea, construction methods and key technologies of three-dimensional geological modeling based on block method and arbitrary boundary conditions by using of VC++ and OpenGL development environment. For the method to build three-dimensional model is simple and accurate. It can be used in the study of mining subsidence prediction and displaying of deformation and failure in the three-dimensional space.
As an important means of virtual reality, image-based virtual space has become the key technology of strategy implementation of Digital Earth and Digital City, and the authenticity of walkthrough simulation is the focus of image-based virtual space systems. In this paper, we first analyzed the shortcomings and deficiencies of existing virtual space, and then proposed image array interpolation method. We inserted image array between adjacent scenes, and loaded it within the set time at the change of the scenes to achieve smooth transition. Finally, we designed and a free image-based virtual space system based on ArcGIS Server and Flex. The results show that this method is feasible and generally applicable.
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