Journal of Geo-information Science ›› 2015, Vol. 17 ›› Issue (2): 215-221.doi: 10.3724/SP.J.1047.2015.00215

• Orginal Article • Previous Articles     Next Articles

Network Simulation and Visual Analysis of Spatiotemporal Process: A Case Study of Dam-break Flood Routing

ZHU Jun1,2,3,*(), YIN Lingzhi1,2, CAO Zhenyu3, ZHANG Xiang1,2, XU Zhu1,2,4, GONG Jing3   

  1. 1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China
    2. State-province Joint Engineering Laboratory of Spatial Information Technology for High-speed Railway Safety, Chengdu 610031, China
    3. Sichuan Engineering Research Center for Emergency Mapping & Disaster Reduction, Chengdu 610041, China
    4. Collaborative Innovation Center for Rail Transportation Safety,Chengdu 610031, China
  • Received:2014-11-12 Revised:2014-12-08 Online:2015-02-10 Published:2015-02-10
  • Contact: ZHU Jun E-mail:vgezj@163.com
  • About author:

    *The author: SHEN Jingwei, E-mail:jingweigis@163.com

Abstract:

Many complicated geographic phenomena such as dam-break flood were complex giant systems, and the dynamic development of their spatiotemporal process is more important than the final formation of the spatial pattern. Therefore, the simulation and analysis of spatiotemporal process and the disaster forecasting warning have become a hot research direction in the field of geographic information science. Meanwhile, with the popularization of Web-GIS technology, the integration of real-time content on web and the visual expression of geographic spatiotemporal process simulation are also demanded by the public urgently. With the rapid development of web service, network technology and their applications in GIS, it is possible to realize the visualization analysis, share and manage distributed spatial data on different clients. After analyzing the latest Web-GIS technology, this paper focuses on the simulation and visual analysis of dam-break flooding spatiotemporal process in the network environment, which can be implemented by applying HTML5, WebGL, Ajax, Web Service technology and other technologies. Some key technologies, which include rapid computing of spatiotemporal process model, B/S network architecture construction, three-dimensional scene rendering optimization, and dynamic interaction analysis, are also discussed in details. Finally, a prototype system was constructed and an experiment of the network simulation and visual analysis of a dam-break flood spatiotemporal process case was conducted on a study region. Experimental results showed that the methods addressed in this paper could successfully publish spatiotemporal process information, conduct online impact analysis and realize the three-dimensional visualization representation under the network environment, which could meet different requirements of browsing, querying and analyzing. It can provide an efficient support to dam-break management and emergency decision-making.

Key words: spatiotemporal process simulation, WebGIS service, dam-break flood, interactive visualization analysis, WebGL