WANG Wenjun, male, postdoctoral researcher, his research interests are GIS and joint emergency response. LUO Yingwei, male, associate professor, his research interests are distributed computing, software agent and GIS. Corresponding author: LUO Yingwei. lyw@pku.edu.cn. LIU Xinpeng, male, candidate of Master's degree, his research interests are Web Service and GIS. WANG Xiaolin, male, an associate professor, his research interests are component technology and GIS. XU Zhuoqun, male, professor, his research interesls distributed/parallel computing, AI and GIS.