中文摘要：

SONG Hongquan, received his Ph.D degree in Key Laboratory of Virtual Geographical Environment, Ministry of Education, Nanjing Normal University in 2013. He is currently a lecturer in College of Life Sciences, Henan University. His research interests include spatial analysis, GIS software design and development, GIS and remote sensing applications. Email： hqsong@henu.edu.cn LIU Xuejun, is currently a professor in Key Laboratory of Virtual Geographical Environment, Ministry of Education, Nanjing Normal University. His current research interests includes Video-GlS, DEM and digital terrain analysis, and transportation GIS. Emaih liuxueju n@njnu.edu.cn Corresponding author Xuejun Liu, E-mail： liuxuejun@njnu.edu. cn LU Guonian, is currently a professor in Key Laboratory of Virtual Geographical Environment, Ministry of Education, Nanjing Normal University. His research interests covered a wide range of topics on GIS, including geographical information science, virtual geographical environment, and geographic modeling. Email： gnlu@njnu.edu.cn Zhang Xingguo, received his Ph.D degree in Key Laboratory of Virtual Geographical Environment, Ministry of Education, Nanjing Normal University in 2014. He is currently a lecturer in College of Urban and Environmental Science, Xinyang Normal University. His research interest includes video GIS, GIS software design and development, digital terrain analysis. Email： zhangxingguo2012@163.com. WANG Feng, received her B.S. degree in College of Real Estate, Beijing Normal University Zhuhai Campus in 2010. She received her M.S. degree in Geographical Information Science from University of Edinburgh in 2011. She is currently a research assistant in College of Life Sciences, Henan University. Her research interest includes spatial analysis and applications of GIS. Email： f_wang108@126.com