Jian Tan Liang Gao Yingchao Ren Lei Wu Fuqing Zhang Lei Sheng Chongjun Yang Research on a Web Gis-Based GPS Vehicle Monitoring System. 926-929 2007 6 Data Science Journal http://www.jstage.jst.go.jp/article/dsj/6/0/6_S926/_article db/journals/datascience/datascience6.html#TanGRWZSY07