三维地形生成与仿真有助于更好地理解地形结构和提高地理数据分析的水平,但由于实际地形起伏千差万别,非常不规则,因此按给定条件进行地形的生成与仿真是非常困难的.本文把地形看成随机统计过程,将分形几何模型与随机点生成技术及实用回归技术相结合,提出了一套切实可行的地形生成技术与方法,在给定地形特征或地形参数(如平均高程、最大高程及其位置、最小高程及其位置、高程标准差、相关长度等)条件,通过模拟符合地形统计特征的随机过程,即可通过计算机自动产生符合要求的“真实”的三维地形。模拟与仿真的结果证明了本方法的可

Since its extreme irregularity and complexity of real topography.3D realistic terrain generation is one of the most challenging problems under some given condition.In this paper.real terrain is regarded as a hierarchical and stochastic process.through the integration of fractal geometry.random number generation and our established terrain model for description of terrain structure.a realistic and feasible hierarchical method for 3D terrain generation is proposed and established. The method we propose is formed by three stages:determination of initial simulation condition.formation of controlling terrain sketch;and addition of localized terrain details by fractal interpolation. Any kind of wonderlul terrains can be simulated according to some given condition such as required topographic parameters(average height,standard deviation.average slope.terrain frequency.terrain relative length etc.)or some known characteristic points by the use of our method.Experimental results show its ellectivity and realiability of this method.