Xia Zhang Deren Li Zhanwu Yu Xinyan Zhu Study on Distributed Spatial Analysis Service. 525-531 2006 conf/imsccs/2006-1 IMSCCS (1) http://doi.ieeecomputersociety.org/10.1109/IMSCCS.2006.130 db/conf/imsccs/imsccs2006-1.html#ZhangLYZ06