By the different wavelet bases, the comPressed multi-level vector map datacan be obtained, and the data can be used to enlarge and reduce electrica1 maP,building InaP Mase and so on.

• 利用这一系列模型，可以根据原矢量数据得到多层次、多细节的压缩数据，以满足地理环境仿真和数据库建设等应用中不同层次的需求。