Xin Zhang 0007 Huabin Chen Huasheng Hong Tianhe Chi Service-Oriented Geographic Information Sharing and Service Architecture for Digital City. 381-386 2007 AWIC http://dx.doi.org/10.1007/978-3-540-72575-6_61 conf/awic/2007 db/conf/awic/awic2007.html#ZhangCHC07