A piecewise bilinear interpolation algorithm based on the fractal features of natural landscape was presented.The statistical fractal features of the original coarse terrain data set were determined through linear regression,based on which a denser terrain can be derived by means of bilinear interpola- tion.The special feature of the presented algorithm is thatit can process coarse sample data with un- equal spacing and generater realistic interpolated surface at the same time.The corroborating experime...