Research on the 3-D Scene Quick Build Method of Virtual City and Implementation Method of Basic GIS Function

Aiming at the common problems of virtual city modeling,such as low efficiency and large amount of data，this paper proposes a quick method to build a virtual city.The method realizes data read automatically through AutoCAD VBA programming, generated the VRML code automatically, buildthree-dimensional scene by the VRML code integration and realize the Web publishing of virual city via Web.