Discussed basic concept and content of Grid, Data Grid, SIG, Grid GIS and Spatial Data Grid. And also the relationship among them with middleware technology, distributed computing, Peer-to-Peer, Web GIS and OpenGIS.

• 论述了网格、数据网格、SIG、Grid GIS和空间数据网格的基本概念和基本内容，并讨论了他们与中间件技术、分布计算技术、P2P技术、Web GIS、OpenGIS之间的关系。