3GOODCHILD M F. Citizens as Voluntary Sensors: Spa- tial Data Infrastructure in the World of Web 2.0[ J]. In- ternational Journal of Spatial Data Infrastructures Re-search ,2007 (2) :24-32.
4ELWOOD S. Grassroots Groups as Stakeholders in Spa- tial Data Infrastructures: Challenges and Opportunities for Local Data Development and Sharing [ J]. Interna- tional Journal of Geographical Information Science, 2008, 22(1) :71-90.
5PENG Z R. A Proposed Framework for Feature-level Geospatial Data Sharing: A Case Study for Transporta- tion Network Data [ J ]. International Journal of Geo- graphical Information Science, 2005,19 (4) : 459-481.
6YANG C, RASKIN R. Introduction to Distributed Geo- graphic Information Processing Research [ J ]. Interna- tional Journal of Geographical Information Science, 2009, 23 (5) :553-560.
7ZHANG C, LI W. The Roles of Web Feature and Web Map Services in Real-time Geospatial Data Sharing for Time-critical Applications [ J].Cartography and Geo- graphic Information Science, 2005,32 ( 4 ) : 269-283.
