On the basis of investigation of present development of 3D GIS, we analyse the cause of difficulties in applying 3D GIS to geology, and discuss the solution and development trend from the point of view 3D data structure, GIS data and DBMS.

• 在三维地理信息系统（3D－GIS）的发展现状分析的基础上，指出了3D－GIS在地学应用中所遇到的困难和原因，并且从3D数据结构和GIS数据及数据库管理系统方面入手，对解决办法及发展趋势进行了探讨