The traditional fractal method for terrain generation has an isotropic fractal feature.In order to generate anisotropic terrain

a new approach to generating anisotropic terrain based on fractal is proposed in this paper.This approach uses the combined fractal Brown surface(CFBS) model and incorporates two fractal Brown surface(FBS) with different fractal features.The fractal features of the corresponding terrain are anisotropic.Finally

some simulations based on CFBS are conducted and the final figures of the corresponding terrains are shown in this paper.The analyses of the simulation results show that the fractal feature is anisotropic

which is accordant to the actual terrain.The simulation results verify the validity of the CFBS model.