传统的分形地形生成方法得到的地形是各向同性的，为了使生成的分形地形具有各向异性特征，提出了一种新的分形地形生成方法，该方法利用组合分形布朗曲面模型，将具有不同特征的两种分形布朗曲面相融合，使得生成的地形具有各向异性特征。对组合分形布朗曲面算法进行了仿真实验，生成了最终的分形地形。对仿真结果的分析表明，生成的分形地形的特征具有各向异性特征，和实际的自然地形特征相符合，从而证明了该算法的有效性。

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.