The traditional two dimensions express method of geographic information system can't meet the need of people

especially for city planer. The 3D building models can recover city construction environment

and finish querying

measuring

cruising et al jobs. It is signify in city geography information system. VRML technology can building dynamic

reality

senseful virtual environment and it don't limit to the bound of field

is an efficient tool for analysis city scene. In this paper we use maximum bound box method to merge 3D building model and 2 5D DEM at first

then use Meier relate data structural to represent topology and semantic information in geometry model and realized dynamic display through the VRML browser to finish the job of using regular 2D GIS data to construct 3D building virtual reality model. The last experiment results show that our method can dynamic display 3D building model at different viewpoint?scale and view angle in VRML browser and realized stereoscopic viewing on the computer screen. Based on experiment and analyzing

we can draw the conclusion that the condition of building 3D building model is provided with the mature development of 2D GIS.