Design and implementation of disaster background database and visualization system

In this paper, management of multi-source heterogeneous disaster background data and fast reconstruction methods of 3D scene are proposed. 2D disasters background database system and 3D disaster visualization system are designed and implemented. By the shared metadata dimensions, integrated organization of disaster background data is realized. Based on multi-threaded pre-caching technology, fast scheduling and display of remote sensing images are achieved. Through interactive mechanism, synchronized data display and operation between 2D and 3D system are realized. Finally, 3D visualization of Wenchuan earthquake area and sea level flooded simulation in the New Coastal Region of Tianjin are took to verify the feasibility of the system. The system has characters of running fast, easy to operate, simple to deploy, and suitable for practical application in disaster rescue.